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Methaemoglobin is a form of haemoglobin with oxidised ferric (+3) iron rather than ferrous (+2) iron, which causes a leftward shift in the oxyhaemoglobin dissociation curve and prevents oxygen delivery. Anaesthesiologists need to be familiar with this differential diagnosis for hypoxia given the use of drugs in the perioperative setting known to induce methaemoglobinaemia, including benzocaine and lidocaine, antibiotics such as dapsone and anaesthetic gases, including nitric oxide. This case report details an interesting case of symptomatic methaemoglobinaemia in the perioperative period in the setting of dapsone use and an erector spinae block performed with ropivacaine.

Stenting for lower tracheal stenosis is a tricky situation and for the safe conduct of anesthesia, it is imperative to maintain spontaneous respiration. Airway topicalization is routinely recommended for anticipated difficult airway. We report a case of upper airway obstruction following lidocaine nebulization in a patient to be taken for tracheal stenting for lower tracheal stenosis. We would like to highlight that close monitoring of the patient is advisable during airway topicalization to detect any airway obstruction at the earliest and how fiberoptic intubation can play a pivotal role to secure the airway in an emergency scenario.

Summary Background The field of laryngology has grown exponentially since the advent of the transnasal flexible laryngoscopy. Flexible laryngoscopy when performed skillfully using the proper technique, facilitates a good view of the hidden areas of the larynx. Objective To compare the effectiveness of the topical agents in providing a more comfortable experience for the patient, allowing the practitioner to advance the endoscope with less friction, pain and discomfort for the patient using 10% lidocaine spray, 2% lidocaine gel, 4% lidocaine with xylometazoline (1:1) soaked pledgets, or aqueous gel. Materials and Methods A prospective randomized single-blinded clinical trial was conducted in a tertiary care teaching hospital in South India where 376 patients were recruited and allocated into four groups based on the topical preparation used. Following endoscopy, each subject filled a questionnaire grading their experience on a visual analogue scale. The clinician also then answered a questionnaire on aspects of the endoscopy performed. Results The pain score and the ease of performing the procedure among the different groups were comparable. Those in the 10% lidocaine arm experienced significant burning sensation (P = 0.0001). The other variables such as throat pain (P = 0.783), gag reflex (P = 0.318), unpleasant taste (P = 0.092), globus (P = 0.190), swallowing difficulty after the procedure (P = 0.273), difficulty in breathing (P = 0.744) and willingness to have a repeat procedure (P = 0.883) were also comparable. Conclusion Aqueous gel can be used topically during a flexible nasopharyngolaryngoscopy instead of an anesthetic agent alone or one combined with a nasal decongestant.

Background: Acute postoperative pain is associated with poor quality of recovery after surgery. Perioperative use of intravenous lignocaine or dexmedetomidine have demonstrated better pain control, early return of bowel function, and effects on quality of recovery. Methods: Ninety-six women planned for elective robotic abdominal hysterectomy were randomized into four groups. Groups received lignocaine infusion (1.5 mg.kg−1 loading, 2 mg.kg−1.h−1 infusion) (Group I), dexmedetomidine infusion (1 µg.kg−1 loading, 0.6 µg.kg−1.h−1 infusion) (Group 2), lidocaine (1.5 mg.kg−1 loading, 2 mg.kg−1.h−1 infusion), and dexmedetomidine infusions (1 µg.kg−1 loading, 0.5 µg.kg−1.h−1 infusion) (Group 3), and normal saline 10 mL loading, 1 mL.kg−1.h−1 infusion) (Group 4). Primary outcome was visual analogue pain scores at 1, 2, 4, 12, and 24 hours after surgery. Secondary outcomes included postoperative fentanyl requirement, time of return of bowel sounds and flatus, QoR15 score on day 1, 2, and discharge. Results The VAS was significantly lower in Groups 2 and 3 compared to Groups 1 and 4. Total postoperative fentanyl consumption in the first 24 hours was 256.25 ± 16.36 mcg (Group 1), 177.71 ± 16.81 mcg (Group 2), 114.17 ± 16.19 mcg (Group 3), and 304.42 ± 31.26 mcg (Group 4), respectively. Time to return of bowel sounds and passage of flatus was significantly shorter in Groups 2 and 3 (p < 0.01). QoR15 scores after surgery were higher in Group 3 compared to Groups 1, 2, and 4, (p < 0.01) respectively. Conclusion: Combined infusion of lignocaine and dexmedetomidine significantly decreased postoperative pain, fentanyl consumption, and improved quality of recovery score after surgery in patients undergoing Robotic abdominal hysterectomy.

Isolated injury to the axillary nerve associated with the patients surgical position is a very rare complication, and in most cases it is associated with the prone during spinal surgery. The presentation of this pathology in relation to surgeries of another nature is exceptional, with only a few cases in the scientific literature. We present the case of a patient who developed symptoms of isolated left axillary nerve palsy after undergoing lipoabdominoplasty and breast reduction, in which the prone and supine positions were alternated. The use of an infiltration solution with lidocaine and epinephrine could have contributed to the appearance of the lesion in this unique case. Finally, the clinical picture was fully resolved thanks to conservative treatment.

Success in anesthesia administration relieves the perception of pain during surgery. Lidocaine is the most commonly used local anesthetic agent in clinical medicine. Moreover, anesthetic agents' temperature changes can influence cell membrane permeability. Here, the effectiveness of different temperatures of Lidocaine (Lid.) on anesthesia success rate has been investigated in rats.Wistar male rats were pretreated by fast injection of lidocaine or saline into the hind paw or intradermal cheek at Room Temperature (RT) and Body Temperature (BT) (22°C and 37°C, respectively). Then, rat behaviors were evaluated by formalin-induced hind paw pain and orofacial pain tests, respectively. Moreover, using a single-unit recording technique, the spontaneous activity of the marginal nerve was recorded at room temperature in the RT-Lid. and BT-Lid. groups.Data analysis revealed that lidocaine had significant antinociceptive effects in both the BT-Lid. and RT-Lid. groups compared to the control groups (P0.05). Also, the number of spikes in the BT-Lid. and RT-Lid. groups were significantly lower than their baselines (P0.05). However, lidocaine at body temperature decreased the total time spent licking the hind paw, the number of lip rubbings, and the number of spikes firing by about 10%-15% compared to room temperature.In both behavioral and neural levels of the study, our results showed that an increase in the temperature of lidocaine toward body temperature could increase anesthesia success rate compared to administration of lidocaine at room temperature. These findings can be considered in the treatment of patients.Lidocaine at body temperature acted better than room temperature on pain control in the formalin-induced hind paw test.Lidocaine at body temperature acted better than room temperature on pain control in the orofacial formalin test.Lidocaine with different temperatures decreased the firing rate of the marginal nerve.Pain is defined as an unpleasant experience caused by tissue damage or fear of injury. During anesthetic injection in dentistry, pain has long been one of the problems of dentists. Studies have shown that one out of every three people is worried about going to dentistry, and one of four dental patients is afraid of injections. The fear of a patient in one of twenty patients is so much that interferes with dental treatment which consequently leads to stress when you visit the dentist, results in less oral hygiene and reduces the number of referrals. Lidocaine is the most commonly used local anesthetic agent in clinical medicine. Here, the effectiveness of different temperatures of lidocaine on anesthesia success rate in rats has been investigated in rats. The present study showed that warming the lidocaine cartridges to 37°C increased anesthesia success compared to anesthesia-induced at room temperature in both behavioral and neural levels of the study. Accordingly, a warmed anesthetic cartridge could be used to control pain by increasing the success rate during dental injection and designed a new animal model study for further investigation in comparing other anesthesia drugs.

Background Complex Regional Pain Syndrome (CRPS) is a neuropathic pain condition with no universally recognised treatment. The study evaluates the efficacy of a therapeutic protocol consisting of oral citalopram and lidocaine injections in patients affected by CRPS. Methods Between January 2010 and December 2014, 150 consecutive patients with CRPS were enrolled in the study and randomly assigned into three groups: group one - lidocaine injection and oral citalopram, group two - lidocaine injection and oral placebo, group three - injective and oral placebo. The Impairment Sum Score (ISS) was used to assess the severity of CRPS before, as well as at regular intervals after treatment commenced. Statistical significance (p Results The combined treatment proved to be more effective (ISS 47.6 to 12.6) than local anesthetic alone (ISS 47.5 to 21.5) and to placebo (ISS 47.2 to 29.9). Conclusion This study indicates that CRPS may be managed with well-tolerated association of oral citalopram and lidocaine injections.

Objective This review focused on comparing the anesthetic efficacy of intraosseous injection and conventional inferior alveolar nerve block in mandibular third molar surgery. Study Design Three electronic databases (PubMed, Scopus, and Web of Science) were accessed to identify randomized controlled trials comparing intraosseous injection with conventional inferior alveolar nerve block in mandibular third molar surgery. The outcome measures included onset of anesthesia, success of anesthetic technique, pain during injection of anesthesia, pain during surgery, and duration of anesthesia. Results Four studies met the inclusion criteria and consisted of 242 mandibular third molar surgeries. No significant differences were found between the anesthetic techniques in terms of onset of anesthesia, success of anesthetic technique, pain during injection of anesthesia, and pain during surgery. However, the intraosseous technique revealed a significantly shorter duration of anesthesia than the inferior alveolar nerve block (mean difference, −56.34 minutes; 95% confidence interval, −70.72 to −41.97; P Conclusions Despite having anesthetic efficacy similar to that of the conventional inferior alveolar nerve block, intraosseous injection has an added benefit of early recovery of sensation owing to its shorter duration of anesthesia.

Background. C-reactive protein (CRP) as a biochemical marker for non-specific inflammation provides an objective measure of invasiveness in total hip arthroplasty. Objective. The aim of our study was to compare CRP levels after hip surgery with either combined spinal and paravertebral blockade or spinal anesthesia alone. The aim of our study was to compare C-reactive protein levels after hip surgery with either combined spinal and paravertebral blockade or spinal anesthesia alone. Materials and methods. The prospective single-center cohort study included 22 patients having elective unilateral hip surgery and randomly divided into two groups. There was no statistically significant difference in anthropometric variables between the groups. In the first (control) group (n = 11: 5 men and 6 wo­men), single-shot spinal anesthesia (L3, plain 0.5% bupivacaine, 12 mg) was used. In the second (study) group (n = 11: 4 men and 7 women), the same spinal anesthesia was used intra-operatively; immediately after surgery the ipsilateral paravertebral space at L3 level was catheterized with Perifix 401 kit (B. Braun, Germany) and 1% lidocaine, 20 mL were administered. The unilateral prolonged paravertebral blockade was maintained with continuously administered 0.25% bupivacaine, 3 mL/hr, during the first post-operative day, then with slow 10-mL bolus each 8 hours during 2–3 days more. CRP levels were measured using a latex-enhanced turbidimetric immunoassay technique (Cobas 6000 Analyser, Roche Diagnoctics) preoperatively and on postoperative days 1, 3, and 7. The results are reported as the median (lower quartile — upper quartile [minimum — maximum]), Mann — Whitney U test was used for intergroup difference evaluation. Results. Preoperative CRP levels were 3.3 mg/L (1.2–6.9 [0.6–68.6]) in the first group and 3.5 mg/L (1.6–10.9 [0.1–58.7]) in the second group (р < 0.05). On the first post-operative day, CRP levels were 89.9 mg/L (44.2–131.1 [13.4–157.0]) in the first group and 30.5 mg/L (26.6–71.9 [21.6–89.6]) in the second group, the intergroup difference was statistically significant (p = 0.039). On the third post-operative day, CRP levels were 108.4 mg/L (80.3–146.5 [63.2–178.6]) in the first group and 74.6 mg/L (63.8–103.0 [20.9–160.5]) in the second group, the intergroup difference was statistically significant (p = 0.048). On the seventh post-operative day, CRP levels were 32.6 mg/L (17.5–63.3 [6.3–84.5]) in the first group and 14.9 mg/L (10.6–19.2 [8.8–25.0]) in the second group, the intergroup difference was statistically significant (p = 0.01). Conclusions. Post-operative analgesia with ipsilateral prolonged paravertebral blockade after intra-operative spinal anesthesia for hip surgery is associated with less C-reactive protein augmentation than with spinal anesthesia alone. The correlation between C-reactive protein response and postoperative pain intensiveness needs additional study.

Background. The general toxic effects of local anesthe­tics on vital organs are the most severe side effects of regional blockades. The purpose was to study the effectiveness and safety of combined solutions of local anesthetics in the brachial plexus block. Materials and methods. Forty-nine patients were divided into 2 study groups. The first group (controls) consisted of 24 individuals who received a solution of 0.5% bupivacaine 36 ml (180 mg) with adrenaline 1 : 200,000 as an adjuvant to block the brachial plexus. The second group (main) consisted of 25 patients, who were treated with a mixture of 2% lidocaine 12 ml (240 mg) and 0.5% bupivacaine 12 ml (60 mg) diluted with a solution of 0.9% NaCl 12 ml and adrenaline 1 : 200,000 as an adjuvant. Results. In the first group (bupivacaine), the onset time of sensory block averaged 11.3 ± 4.3 minutes, motor block — 21.0 ± 7.8 minutes. The motor block duration was 894 ± 237 minutes. In the second group (mixture), the onset time of sensory block averaged 8.0 ± 3.6 minutes, motor block — 14.0 ± 6.2 minutes, which was significantly less than in the first group. The duration of the motor block was 539 ± 186 minutes. The longest postoperative analgesia was registered in the bupivacaine group — 984 ± 263 minutes. The duration of postoperative analgesia in the main group was slightly shorter — 612 ± 210 minu­tes. Conclusions. The proposed combination of local anesthe­tics bupivacaine and lidocaine allows reducing the bupivacaine dose by three times, which decreases the toxic complications of conduction anesthesia. The clinical use of the proposed drug combination reduces the duration of the latent period and provides long-term postoperative analgesia., Актуальність. Найважчим проявом побічних ефектів при регіонарних блокадах є загальний токсичний вплив місцевих анестетиків на життєво важливі органи. Метою дослідження є вивчення ефективності й безпечності застосування комбінованих розчинів місцевих анестетиків при блокадах плечового сплетення. Матеріали та методи. 49 хворих було розподілено у 2 групи дослідження. Першу групу (контрольну) становили 24 хворі, яким для блокування плечового сплетення застосовувався розчин бупівакаїну 0,5% 36 мл (180 мг) з додаванням як ад’юванту адреналіну 1 : 200 000. Другу групу (основну) становили 25 хворих, яким для блокування плечового сплетення застосовувалась суміш розчинів лідокаїну 2% 12 мл (240 мг) і бупівакаїну 0,5% 12 мл (60 мг) з розведенням розчином NaCl 0,9% 12 мл і додаванням як ад’юванту адреналіну 1 : 200 000. Результати. У першій групі (бупівакаїн) час до початку сенсорної блокади в середньому становив 11,3 ± 4,3 хв, моторної блокади — 21,0 ± 7,8 хв. Тривалість моторного блоку — 894 ± 237 хв. У другій групі (суміш) час до початку сенсорної блокади в середньому становив 8,0 ± 3,6 хв, моторної блокади — 14,0 ± 6,2 хв, що було вірогідно меншим, ніж у першій групі. Тривалість моторного блоку — 539 ± 186 хв. Найбільшу тривалість післяопераційної аналгезії було зареєстровано в групі бупівакаїну — 984 ± 263 хв. В основній групі тривалість післяопераційного знеболювання була дещо меншою і становила 612 ± 210 хв. Висновки. Запропонована комбінація місцевих анестетиків бупівакаїну і лідокаїну дозволяє в три рази зменшити дозу бупівакаїну, що знижує імовірність токсичних ускладнень провідникової анестезії. Клінічне застосування запропонованої комбінації препаратів скорочує тривалість латентного періоду, забезпечує тривалу післяопераційну аналгезію.

Introduction Epistaxis is a very common presentation in the emergency department (ED), accounting for approximately 1 in 200 ED visits in the United States. Currently, standard practice includes the initial use of topical anesthetics and vasoconstrictors, followed by more invasive treatments such as nasal packing, cauterization or surgical ligation for refractory cases. Over the years several studies have investigated the potential use of topical Tranexamic Acid (TXA) in the management of epistaxis. We have conducted a meta-analysis to assess the efficacy of topical TXA versus other standard practices or placebo in the management of epistaxis. Methods PubMed and Scopus databases were searched from inception to April 2021. We included randomized controlled trials and observational studies investigating the efficacy of TXA in bleeding cessation in epistaxis in adults. The primary outcome measured was the prevalence of bleeding cessation after treatment at first assessment. Other outcomes were bleeding reoccurrence between 24 and 72 h and at 7–8 days. A random-effects model was used to estimate odds ratio (OR) for outcomes. Results A total of eight studies were included in the analysis, including seven randomized trials and one retrospective study. We included a total of 1299 patients, 596 (46%) received TXA while 703 (54%) received control treatment (placebo, lidocaine plus vasoconstrictors or local anesthetics). Patients who were treated with TXA were 3.5 times (OR 3.5, 95% CI 1.3–9.7) more likely to achieve bleeding cessation at the first assessment. Patients treated with TXA had 63% (OR 0.37, 95% CI 0.20–0.66) less likelihood of returning due to rebleeding at 24–72 h. Conclusion Topical TXA is associated with better bleeding cessation rates after treatment compared to the standard practices.

To compare the safety and efficacy of sub-Tenon injection of mitomycin C (MMC) with application of MMC-infused sponges during trabeculectomy.Single-center randomized clinical trial.A total of 56 eyes of 49 patients with open-angle glaucoma were included in this clinical trial.In this single-center randomized clinical trial, 56 eyes of 49 patients underwent trabeculectomy with MMC for primary open-angle glaucoma. Patients were randomized into 2 groups. The injection group received a sub-Tenon injection of 0.15 ml of 0.01% MMC diluted with preservative free lidocaine 2% (n = 27). In the sponges group, sponges soaked in 0.02% MMC were applied under the Tenon's capsule and the scleral flap for 2 minutes (n = 29). Intraocular pressure, endothelial cell count, best-corrected visual acuity, and number of intraocular pressure (IOP)-lowering medications were assessed before surgery and 1 week; 1, 3, and 6 months; and 1 year after surgery. Complete success was defined as IOP of 14 mmHg or less without medication. Bleb morphologic features were assessed using the Indiana Bleb Appearance Grading Scale bleb grading system.Intraocular pressure reduction was the primary outcome. Bleb morphologic features and endothelial cell counts (ECCs) were secondary outcomes.Mean IOP in the sponges group decreased from 30.5 ± 7.4 mmHg at baseline to 12.6 ± 5.9 mmHg at 1 year (P0.001); in the injection group, IOP decreased from 29.3 ± 6.8 mmHg at baseline to 12.7 ± 4.3 mmHg at 1 year (P0.001). No difference in IOP between the 2 groups was noted at any visit (P0.001). Surgical success was 81.5% and 82.8% in the injection and sponges groups, respectively, at 1 year. Mean ECC values were unchanged from baseline to 1 year after surgery for both groups (P = 0.444). Complication rates were similar in the 2 groups. Bleb morphologic features showed differences in the appearance and grading of the blebs between the 2 groups at 1 year, showing larger extent, lower height, and less vascularization in the injection group.Sub-Tenon injection of MMC during trabeculectomy seems to be as safe and as efficacious as conventional application of MMC with sponges at 1 year after surgery. Bleb morphologic features show notable differences that may suggest a better long-term outcome.

Background: Visceral and shoulder painare among the most frequent reported pain after laparoscopic cholecystectomy (LC). Objectives: To investigate the effectiveness and clinical value of rectal indomecthacin and intraperitoneal lidocaine for treating pain after laparoscopic cholecystectomy. Patients and methods: In Qena university hospital, this prospective randomized comparative study was conducted, 80 patients were scheduled to elective laparoscopic cholecystectomy. Group intraperitoneal"IP" lidocaine (40 patients) received 200 ml saline containing 200 mg 2%lidocaine immediately after pneumoperitoneum, the total solution was sprayed on the upper surface of the liver, right subdiaphragmatic space and around the cholecystectomy site. Group indomethacin (40 patients) received two 100 mg indomethacin rectal suppositories 2 hours prior to surgery. Results: VAS score was significantly lower in indomethacine group ( p value =0.03)over the 24 hours postoperative . The postoperative pethidine requirements were significant lower in group indomethacin mean (34±11.4 mg). Postoperative nausea and vomiting were less in group indomethacin with no statistically significant difference. Conclusion: preoperative rectal indomethacin suppositories decrease postoperative pain scores and analgesics requirements without producing side effects comparing to IP lidocaine in LC. Clinical trail .gov . ID:NCT04964180

Introduction and objectives: Although lidocaine is widely used to prevent cardiovascular changes resulting from laryngoscopy and orotracheal intubation, it is still unclear whether there are more efficacious drugs. This study aimed to compare the beta-blocker esmolol with lidocaine regarding the effects on hemodynamic response after orotracheal intubation. Methods: The study has a prospective, randomized, double-blind, superiority design, and assessed 69 participants between 18 and 70 years of age, ASA I-II, scheduled for elective or emergency surgery under general anesthesia with orotracheal intubation. Participants were randomly allocated to receive 1.5 mg.kg-1 esmolol bolus followed by 0.1 mg.kg-1.min-1 esmolol infusion (n = 34) or 1.5 mg.kg-1 lidocaine bolus followed by 1.5 mg.kg-1.h-1 lidocaine infusion (n = 35). We recorded changes in heart rate, arterial blood pressure and incidence of adverse events. Results: Post-intubation tachycardia episodes were significantly less frequent in the esmolol group (5.9% vs. 34.3%; Relative Risk (RR) 0.17; 95% Confidence Interval (95% CI) 0.04-0.71; Number Needed to Treat (NNT) 3.5; p = 0.015. After orotracheal intubation, mean heart rate was significantly lower in the esmolol group (74.5 vs. 84.5, p = 0.006). Similar results were observed in the subsequent 3 and 6 minutes (75.9 vs. 83.9, p = 0.023 and 74.6 vs. 83.0, p = 0.013, respectively). Conclusion: Esmolol was a safe and more effective intervention to reduce incidence of tachycardia and control heart rate immediately after tracheal intubation when compared to lidocaine.

Purpose Fentanyl is an analgesic that is frequently prescribed, which resulted in non-intentional as well as intentional misuse and deaths. Here, we present a postmortem case of a patient who clearly died of a fentanyl overdose due to an extensive number of fentanyl patches combined with oral intake of fentanyl and cocaine. We aimed to show how postmortem analysis can be used to interpret postmortem fentanyl concentrations in unique cases like the one we present. Case description A 23-year-old male was found dead in his bedroom with 67 non-prescribed patches of fentanyl on his body. In the room, there also were fentanyl tablets of 100 µg and cocaine powder, which had possibly also been taken by the deceased. To confirm the cause of death, urine and subclavian blood were retrieved to perform a standard postmortem toxicology screening. The toxicological screening revealed the presence of several drugs, including cocaine, fentanyl, lidocaine and paracetamol. Further analysis of the quantitative postmortem values of fentanyl with ultra-performance liquid chromatography-tandem mass spectrometry revealed a fentanyl concentration of 57.9 µg/L. Considering several issues around postmortem drug analyses, this value seemed to be in line with concentrations found in previously reported postmortem cases. Conclusion We were able to confirm the expected cause of death with an extensive toxicological screening in combination with the circumstantial evidence. We identified fentanyl as most important cause for the fatal outcome in this specific case and simultaneously contributed to the limited availability of knowledge on postmortem fentanyl concentrations.

Background Type 3 long QT syndrome (LQT3) is caused by pathogenic, gain-of-function variants in SCN5A leading to a prolonged action potential, ventricular ectopy, and torsades de pointes. Treatment options include pharmacotherapy, cardiac denervation, and/or device therapy. Rarely, patients with malignant LQT3 require cardiac transplantation. Objective The purpose of this study was to evaluate the role of chronic continuous intravenous (IV) lidocaine as a therapeutic option for select patients with LQT3 refractory to standard therapy. Methods We performed a retrospective review of patients evaluated and treated at Mayo Clinic and identified 4 of 161 patients with LQT3 (2.5%) who were refractory to standard therapies and therefore treated with IV lidocaine. Results There were 4 patients (2 female [50%]). The median age at first IV lidocaine infusion was 2 months (interquartile range 1.5–4.8 months), and the median cumulative duration on IV lidocaine was 11.5 months (interquartile range 8.7–17.8 months). The main indication for IV lidocaine in all patients was persistent ventricular arrhythmias. Before IV lidocaine, all patients received an implantable cardioverter-defibrillator, and while on intermittent IV lidocaine, all patients underwent bilateral cardiac sympathetic denervation. Additionally, 2 (50%) patients had cardiac ablation for premature ventricular complexes. In all patients, lidocaine infusion resulted in a significant reduction of LQT3-triggered cardiac events. The main side effects of IV lidocaine observed were dizziness (n = 2, 50%) and seizures (n = 2, 50%). During follow-up, 3 of 4 (75%) patients underwent orthotopic cardiac transplantation. The remaining patient continues to receive IV lidocaine bolus for rescue as needed. Conclusion For patients with LQT3 who are refractory to standard treatment, chronic IV lidocaine infusion can be used as a potential “bridge to transplant.”

OBJECTIVES Different anesthesia techniques are used for surgical implantation of paddle lead electrodes for neurostimulation through a laminectomy. We wanted to evaluate the use of dexmedetomidine as sedative for this procedure in a series of patients. Second, we wanted to verify whether the stimulation pattern and position of the electrode had to be changed during the procedure guided by the patient's feedback. MATERIAL AND METHODS Twenty-five consecutive patients received surgical implantation of a spinal cord stimulation electrode under conscious sedation using dexmedetomidine and local anesthesia. We evaluated the effects of the administered drug, the patient comfort, and the adequacy of the stimulation pattern. RESULTS Twenty-four patients completed the procedure with only dexmedetomidine and local anesthetic. Infusion was started on average 55 minutes (sd 29) prior to incision. The mean dose of lidocaine was 430 mg (sd 95). There were no significant hemodynamic changes. Median time to reach Modified Aldrete's score postoperative was 67 minutes (sd 38). In 46% of the patients, the position of the electrode was changed guided by the feedback of the patient. More than half of the patients remember most details of the procedure. Only four patients mentioned substantial discomfort and only three would definitely not want to undergo this procedure again. CONCLUSIONS Implantation of spinal cord stimulation electrodes through a surgical laminectomy using dexmedetomidine is a safe and feasible procedure with adequate comfort for patient and surgeon. This way of working increases the optimal position of the electrode resulting in the most convenient stimulation pattern and avoiding revisions.

Background: Local anesthetics often are used in rotator cuff tears as therapeutic tools, although some cases have reported that they have detrimental effects. Neurotropin (NTP) is used widely in Japan as a treatment for various chronic pain conditions and is shown to have protective effects on cartilage and nerve cells. In this study, we investigated the protective effect of NTP against lidocaine-induced cytotoxicity. Methods: Tenocytes from rotator cuff tendons were incubated with lidocaine, NTP, lidocaine with NTP, and a control medium. Cell viability was evaluated using the WST-8 assay. Cell apoptosis was detected via annexin V staining using flow cytometry. The expression of BCL-2 and cytochrome c, which are involved in the intrinsic mitochondrial pathway of apoptosis, was evaluated via Western blotting and immunohistochemical staining. Results: In the cell viability assay, lidocaine decreased cell viability in a dose-dependent manner, and NTP did not affect cell viability. Moreover, NTP significantly inhibited the cytotoxic effect of lidocaine. The flow cytometry analysis showed that lidocaine significantly induced apoptosis in tenocytes, and NTP considerably inhibited this lidocaine-induced apoptosis. Western blotting experiments showed that lidocaine decreased the protein expression of BCL-2, and that NTP conserved the expression of BCL-2, even when used with lidocaine. Immunohistochemical staining for cytochrome c showed that 0.1% lidocaine increased cytochrome c-positive cells, and NTP suppressed lidocaine-induced cytochrome c expression. Conclusions: NTP suppresses lidocaine-induced apoptosis of tenocytes by inhibiting the mitochondrial apoptotic pathway. Intra-articular/ bursal injection of NTP with lidocaine could protect tenocytes in rotator cuff tendons against lidocaine-induced apoptosis.

One of the biggest challenges in managing laminitis in horses remains the control of pain. The best analgesic approach is a multimodal approach, including nonsteroidal anti-inflammatory drugs, opioids, and/or constant rate infusions of α-2 agonists, ketamine, and lidocaine. Recent literature indicates that amitriptyline and soluble epoxide hydrolase inhibitor might be beneficial. Clinically oriented studies will be needed if they have a place in laminitis pain management. The systemic pain control can be combined with local techniques such as long-acting local anesthetics or epidural catheterization that allows for administration of potent analgesic therapy with a lower risk of negative side effects.

Objective Radial arterial puncture is a painful procedure. The aim of this study was to evaluate the effect of lidocaine spray (10%) on pain associated with radial artery blood withdrawal for arterial blood gas analysis. Methods This randomized, controlled, double-blind study was performed between December 2018 and September 2019. Before radial arterial puncture, 10% lidocaine or placebo spray was applied to each patient by the attending physician, who was blinded with regard to random assignment. The spray was administered six times on the site from a distance of 5 cm. After waiting for 5 min, a radial arterial puncture was performed routinely. The pain levels of patients during radial arterial puncture and 5 min after puncture were evaluated with the visual analog scale (VAS). The Wilcoxon test was used to compare pain scores during puncture. Results The research was performed with 67 patients (34 patients in the lidocaine group, 33 patients in the placebo group) who were admitted to the emergency department and required ABG analysis. Forty-three patients were men, and 24 were women. The ages of the patients ranged between 19 and 86 years, and the mean (± standard deviation) age was 56.3 ± 16.6 years. Pain levels, as measured by VAS, were significantly lower in the lidocaine group (24.00 mm IQR:[14.75–33.75]) compared with the placebo group (33.00 mm IQR:[22.00–61.50]) during radial arterial puncture (p = 0.011). Conclusions The level of pain perceived during radial arterial puncture was significantly lower in those who were administered lidocaine spray. Lidocaine spray application can be used in pain management related to radial arterial puncture.

Introduction The purpose of this prospective study was to determine the effect of a combination of nitrous oxide/oxygen and 1 set of supplemental intraligamentary/periodontal ligament (PDL) injections followed by a second set of PDL injections on anesthetic success in patients with symptomatic irreversible pulpitis (SIP). Methods Ninety-four patients with a mandibular posterior tooth diagnosed with SIP received nitrous oxide/oxygen and an inferior alveolar nerve block (IANB) with 2% lidocaine with 1:100,000 epinephrine. Patients rated the pain of PDL injections and endodontic access on a visual analog scale. If moderate to severe pain was felt during treatment, the operator administered 1 set of supplemental PDL injections with 4% articaine with 1:100,000 epinephrine. If moderate to severe pain was felt again during treatment, the operator administered a second set of supplemental PDL injections. Anesthetic success was defined as having no to mild pain during endodontic treatment. Results The success of the IANB with nitrous oxide was 44% (95% confidence interval [CI], 34%–54%). The overall anesthetic success rate (IANB with PDL injections) was increased from 69% (95% CI, 60%–78%) with 1 set of PDL injections to 80% (95% CI, 72%–88%) with a second set of PDL injections. Conclusions Although the second set of PDL injections increased anesthetic success, it was not sufficient to ensure complete pulpal anesthesia.

Background For emergent intrapartum cesarean delivery (CD), the literature does not support the use of any particular local anesthetic solution to extend epidural analgesia to cesarean anesthesia. We hypothesized that 3% chloroprocaine (CP) would be noninferior to a mixture of 2% lidocaine, 150 µg of epinephrine, 2 mL of 8.4% bicarbonate, and 100 µg of fentanyl (LEBF) in terms of onset time to surgical anesthesia. Methods In this single-center randomized noninferiority trial, adult healthy women undergoing CD were randomly assigned to epidural anesthesia with either CP or LEBF. Sensory blockade (pinprick) to T10 was established before operating room (OR) entry for elective CD. On arrival to the OR, participants received the epidural study medications in a standardized manner to simulate the conversion of "epidural labor analgesia to surgical anesthesia." The primary outcome was the time to loss of touch sensation at the T7 level. A noninferiority margin was set at 3 minutes. The secondary outcome was the need for intraoperative analgesia supplementation. Results In total, 70 women were enrolled in the study. The mean onset time to achieve a bilateral sensory block to touch at the T7 dermatome level was 655 (standard deviation [SD] = 258) seconds for group CP and 558 (269) seconds for group LEBF, a difference in means of 97 seconds (90% confidence interval [CI], SD = -10.6 to 204; P = .10 for noninferiority). The upper limit of the 90% CI for the mean difference exceeded the prespecified 3-minute noninferiority margin. There was no meaningful difference in the requirement for intraoperative analgesia between the 2 groups. Conclusion Both anesthetic solutions have a rapid onset of anesthesia when used to extend low-dose epidural sensory block to surgical anesthesia. Data from the current study provide insufficient evidence to confirm that CP is noninferior to LEBF for rapid epidural extension anesthesia for CD, and further research is required to determine noninferiority.

BACKGROUND With a 13 percent global prevalence, migraine headaches are the most commonly diagnosed neurologic disorder, and are a top five cause of visits to the emergency room. Surgical techniques, such as decompression and/or ablation of neurovasculature, have shown to provide relief. Popular diagnostic modalities to identify trigger loci include handheld Doppler examinations and botulinum toxin injection. This article aims to establish the positive predictive value of peripheral nerve blocks for identifying therapeutic surgical targets for migraine headache surgery. METHODS Electronic medical records of 36 patients were analyzed retrospectively. Patients underwent peripheral nerve blocks using 1% lidocaine with epinephrine and subsequent surgery on identified migraine headache trigger sites. Patients were grouped into successful and unsuccessful blocks and further categorized into successful and unsuccessful surgery subgroups. Group analysis was performed using paired t tests, and positive-predictive value calculations were performed on subgroups. RESULTS The preoperative Migraine Headache Index of patients with positive blocks was 152.71, versus 34.26 postoperatively (p < 0.001). Each index component also decreased significantly: frequency (22.11 versus 15.06 migraine headaches per month; p < 0.001), intensity (7.43 versus 4.12; p < 0.001), and duration (0.93 versus 0.55 days; p < 0.001). The positive-predictive value of diagnostic peripheral nerve blocks in identifying a migraine headache trigger site responsive to surgical intervention was calculated to be 0.89 (95 percent CI, 1 to 0.74). CONCLUSIONS To the authors' knowledge, this is the first study to investigate the positive-predictive value of peripheral nerve blocks as used in the diagnostic workup of patients with chronic migraine headaches. Peripheral nerve blocks serve as a reliable clinical tool in mapping migraine trigger sites for surgical intervention while offering more flexibility in their administration and recording as compared to established diagnostic methods. . CLINICAL QUESTION/LEVEL OF EVIDENCE Diagnostic, IV.

This study aimed to explore the effect and mechanism of lidocaine pretreatment combined with dexmedetomidine on oxidative stress in patients with intracranial aneurysm clipping. Many studies have used various drugs such as lidocaine to explore the effect and mechanism of lidocaine pretreatment. A total of 80 patients with intracranial aneurysm clipping surgery were randomly divided into 4 groups: the single lidocaine group, single dexmedetomidine group, lidocaine combined with dexmedetomidine group, and control group. The thread embolism method was used to establish a stable intracranial aneurysm model of Hashimoto rats. Fifty adult rats were randomly divided into a sham operation group, ligation of the left common carotid artery and bilateral posterior branch of renal artery, lidocaine group, dexmedetomidine group, and lidocaine combined with dexmedetomidine group. The colorimetric method was used to determine the oxidative stress indicators in brain tissue: MDA content, SOD activity, and T-AOC content. The western blot method characterized the protein levels related to oxidative stress: nNOS, iNOS, and NADPH oxidase subunits p22phox, gp91phox, and p47phox. The differences in each index between the groups were statistically significant ( P < 0.05 ). Animal experiment results revealed that the content of MDA in the brain tissue of rats in the LD group was significantly lower than that in the single-drug group and sham group. The T-AOC and SOD concentrations in the LD group were significantly higher than those in the single-drug group and sham group, and the differences between the groups were statistically significant ( P < 0.05 ). The protein expression of the LD group was significantly lower than that of the drug-alone group and model group, and the difference between groups was statistically significant ( P < 0.05 ). To sum up, lidocaine pretreatment combined with dexmedetomidine can effectively maintain the hemodynamic stability of patients with intracranial aneurysm clipping and reduce postoperative oxidative stress response. Its mechanism of action may be related to the inhibition of oxidative stress damage mediated by nNOS, iNOS, and p22phox, gp91phox, and p47phox in the hippocampus. Our study has significant and applicable medical aspects in lidocaine pretreatment combined with dexmedetomidine on oxidative stress in patients.

Chronic pain conditions are prevalent and cause a significant burden of disease. Intravenous lidocaine infusions have been reported to have an analgesic effect in patients with chronic neuropathic pain, but there is limited data supporting the efficacy of lidocaine across other chronic pain phenotypes. Our study aimed to evaluate the efficacy of a single infusion of intravenous lidocaine for pain relief and the impact on quality of life. We evaluated data from 74 patients with chronic pain who were treated with intravenous lidocaine at a specialist pain centre. Participants completed a questionnaire consisting of the Brief Pain Inventory (BPI) Short Form and additional EQ-5D quality of life metrics, before treatment and at follow-up. Data comparing pain severity did not demonstrate a statistically significant change after treatment when averaged across the entire patient cohort (6.15–5.88, p = .106), irrespective of gender or pain phenotype. Scores for pain interference showed statistically significant reductions following treatment (7.05–6.41, p = .023), which may have been driven through improvements in sleep (7.41–6.35, p = .001); however, these reductions are not clinically significant. The patient cohort was stratified into responders and non-responders based on >30% improvement in response to an overall impression of pain reduction question following treatment. In the ‘responder’ cohort, pain intensity scores showed a statistically significant reduction post-infusion (6.18–5.49, p = .0135), but no change was apparent for non-responders (6.07–6.09, p = .920). There were no differences between responders and non-responders for pain sub-types in our study. This study found no difference in pain outcomes in a cohort of patients with chronic pain, a mean of 63 days following a single lidocaine infusion. However, a specific subgroup of responders may show slight improvements in some pain outcomes that may warrant further exploration.

Background Digit replantation under wide-awake local anesthesia is a challenging method, and there are only a few works of literature on this procedure. This article describes the authors' clinical experience in finger replantation under wide-awake local anesthesia compared to general anesthesia. Methods Fifty-one patients who received single finger replantation after initial sharp amputation were included in the study of whom 16 received wide-awake local anesthesia and 35 general anesthesia treatment. The indications for wide-awake local anesthesia were sharp amputation injury, estimated operation time less than 3 hours, and cooperative patients. The wide-awake local anesthesia was performed with 1% or 2% lidocaine infiltrated at the volar midpoint of the metacarpophalangeal joint of the affected digit without sedation medications. Demographic data included surgical outcome, waiting time, operation time, and hospital stay. Results A total of 51 consecutive patients were included in this study. There were significantly shorter waiting times and operation times in the wide-awake local anesthesia group. The other parameters showed no significant differences. The overall success rate was 76.47 percent, with a mean overall operation time of 206 minutes. Conclusions In selected patients, finger replantation can be successfully performed under wide-awake local anesthesia, which has lower anesthesia risk and fewer medical expenses than general anesthesia. The method is feasible for single-digit replantation. Therefore, the finger replantation under wide-awake local anesthesia is a practicable alternative to general anesthesia. Clinical question/level of evidence Therapeutic, III.

OBJECTIVES The aim of this study was to assess whether the use of topical pharyngeal anesthesia improves endoscopist- and patient-reported tolerance and satisfaction, the total dose of propofol used and the rate of adverse effects associated with this procedure. METHODS This double-blind randomized clinical trial was conducted in patients undergoing elective oesophagogastroduodenoscopy, who met the inclusion criteria. Patients were randomly assigned to receive five squirts of lidocaine 10% spray (50 mg, n = 268) or placebo (n = 271) 3 min before starting the procedure or sedation. The main outcome measures were patient- and endoscopist-reported tolerance, and additionally, satisfaction with the procedure, adverse events and supplementary propofol used. RESULTS In the lidocaine group, it was twice (odds ratio [OR] 2.136, 95% confidence interval [CI] 1.228-3.715) or three times (OR 3.311, 95% CI 1.623-6.757) more likely that the endoscopist rated the procedure as well tolerated and easy to intubate than as well tolerated but the patient difficult to intubate or as poorly tolerated, respectively. Further, in these patients, less propofol was used (80 vs. 100 mg, P = 0.001). Controls were more likely to cough during the intubation (OR 2.172, 95% CI 1.378-3.423) and the procedure (OR 1.989, 95% CI 1.325-2.984), as well as more likely to retch (OR 3.582, 95% CI 1.667-7.7). CONCLUSIONS Topical lidocaine may improve the procedure as rated by the endoscopist, as well as reduce the requirement for propofol and rate of adverse events such as retching and coughing. No adverse events associated with lidocaine administration were observed. ClinicalTrials registration no. NCT02733471.

Background. The presence of opioid receptors around the peripheral nerves offers the possibility of providing postoperative analgesia, thereby encouraging the study of the effect of opioids in combination with local anesthesia (LA). Studies have also reported the efficacy of peripherally administered opioids in achieving adequate analgesia in regions with inflammation. Applying the concept of peripheral opioid receptors, our study aimed to evaluate the effectiveness of opioid analgesia in managing postoperative pain. The split-mouth study was carried out to evaluate the efficacy of buprenorphine added to lidocaine 2% in providing postoperative analgesia after the surgical extraction of the impacted mandibular third molar. Materials and Methods. We conducted a randomized, double-blinded, split-mouth trial among 21 patients with impacted mandibular third molars bilaterally. In all patients, bilateral impacted mandibular third molars were extracted at different periods. The primary outcomes assessed were postoperative analgesia by the VAS score and the number of rescue analgesics consumed by patients at 24, 48, and 72 hours of interval via a questionnaire. Results. There was a statistical significant difference in postoperative analgesia duration at 24 (P = 0.012) and 48 hours (P = 0.024), respectively, between the test and control group. Even though the mean number of rescue analgesics consumed by the test group was less than that of the control group, no significant difference was seen. Conclusion. Buprenorphine added to lidocaine 2% showed a minimal decrease in the pain score and duration of postoperative analgesia with no difference in the frequency of rescue analgesics consumed between the test and control.

BACKGROUND Pliaglis® is a self-occluding topical anesthetic containing a eutectic mixture of 7% lidocaine and 7% tetracaine, with proven efficacy and safety in several trials. AIMS To evaluate the effectiveness and safety of Pliaglis® for different dermatological procedures in real-life clinical practice. METHODS This retrospective, multicenter study included 35 patients treated with Pliaglis® prior to five dermatological procedures (pulsed dyed laser, picosecond laser, non-ablative fractional laser, radiofrequency microneedling, and photodynamic therapy). The primary endpoint was to assess the pain during the procedure with a visual analogue score (VAS) from 0 (no pain) to 10 (most severe pain). Secondary endpoints were the global effectiveness and tolerability (from 0 = very low to 10 = excellent), and the adverse events (AEs) after Pliaglis® removal, classified according to intensity (1-3). RESULTS The median and mean pain VAS reported by patients was 2 (range 0-9) and 2.9 (±2.3), respectively. More than 65% of the patients had a VAS score ≤3. The effectiveness reported by investigators was "very good" (median 8 [range 2-10], mean 7.5 [±1.9]), which was strongly correlated with the pain VAS reported by patients (Spearman coefficient = - 0.9; p

Coronavirus disease COVID-19 pandemic has imposed a reality that requires us to protect ourselves from infection, especially as the disease is highly infectious and has no specific treatment. Disinfectants are one of the most important ways to prevent the virus, specifically chlorine and alcohol-based hand sensitizers. This study aims to discuss the efficacy of both alcohol disinfectants and chlorine on the Coronavirus, and that discussion led us to the conclusion that both have an effective role in killing the virus in close proportion if used in the required circumstances and in the right way. Alcohol can also be used to make hand rubs, because of its short duration of action, and reduced side effects. Alcohol is superior to the time required to kill the organism, completing the task in just 30 seconds compared to chlorine, which takes 30 minutes. Chlorine can be used to disinfect many types of surfaces and facilities due to its dangerous adverse effects on humans

The coronavirus pandemic has had a severe impact on the health care system. It is also changing the appointment and conduct of diagnostic procedures, emergency and routine medical care. According to the medical guidelines of the European Society of Urology (EAU) for the provision of urological care during the current epidemic situation, various levels of urgency have been proposed for diagnostic and therapeutic measures depending on the type of disease. Urodynamic studies refer to studies with a priority level from P2 (for neurogenic dysfunction of the urinary tract) to P4 (for lower urinary tract dysfunction without the risk of damage to the upper urinary tract). The question arises regarding the safety of these studies, both for patients and medical staff, and possible measures to reduce the risk of infection in a viral pandemic. Because of the increased workload of hospitals that have not been redesigned for the fight against coronavirus infection and provide routine and emergency urological care, an even greater need has arisen to find effective and safe methods of local anaesthesia for performing urodynamic studies and intradetrusive injections of botulinum toxin type A under local anesthesia in outpatient and outpatient settings (for example, in a short-term hospital). This article presents a literature review on the principles and features of performing urodynamic studies in the context of the Covid-19 pandemic and the effectiveness and safety of using various methods of local anaesthesia when performing intradetrusor injections of botulinum toxin with detrusor hyperactivity of a neurogenic and non-neurogenic nature. There were evaluated forms of local anaesthesia such as intradetrusor instillation of lidocaine, electrophoresis, and the use of alternative solutions for urinary bladder irrigation (for example, Ringer’s solution).

Multicomponent analysis using overlapped spectra presents a great challenge in pharmaceutical quality control analysis. The present study was aimed to develop a simple and accurate UV spectrophotometric method for the determination of diclofenac sodium in the presence of lidocaine hydrochloride in an injectable dosage form. The proposed method is based on the simultaneous analysis of diclofenac sodium and lidocaine hydrochloride using two wavelengths (276 nm and 235 nm). Method validation was conducted in accordance with the ICH guidelines. The Beer-Lambert law was obeyed in a concentration range of 6 – 24 and 1.6 – 6.4 μg/mL for diclofenac sodium and lidocaine hydrochloride, respectively, with correlation coefficient not less than 0.996. It proved to be a precise method (RSD% < 3%, n = 6) with good recovery results, which reflects the freedom of interference with lidocaine and other excipients. Thus, the developed method has proved to be accurate and valid for the simultaneous analysis of diclofenac sodium and lidocaine hydrochloride.

Background Multimodal analgesia consists of the combination of analgesic drugs at low doses to act in different places along the path of pain. Studies with continuous infusion of analgesic drugs in cats are not common. This study aimed to evaluate the analgesic effect of maropitant, lidocaine and ketamine alone or in combination (intravenous bolus + subsequent continuous intravenous infusion) in the management of acute postoperative pain in cats undergoing ovariohysterectomy. Seventy healthy cats undergoing an ovariohysterectomy received a standard anesthetic protocol consisting of acepromazine and morphine, propofol (anesthesia induction), and isoflurane (anesthesia maintenance). The animals were stratified into seven groups (n = 10 in each group): control (CG), maropitant (MG), lidocaine (LG), ketamine (KG), maropitant + lidocaine (LMG), maropitant + ketamine (KMG), and maropitant + lidocaine + ketamine (LKMG). All drugs were injected first as an intravenous bolus and then by continuous intravenous infusion. During surgery, esophageal temperature, respiratory rate, heart rate, oxygen saturation, expired isoflurane concentration, and partial pressure of carbon dioxide at the end of expiration were evaluated at 7 time points. Postoperative pain was evaluated for 6 h after extubation using the visual analogue scale and the UNESP-Botucatu multidimensional composite pain scale for assessing postoperative pain in cats. Results Adverse effects related to maropitant, lidocaine and ketamine infusion were not observed. Pain scores were lower in the MG, KG and LG groups when compared to the CG group using both scales. Although pain scores were also lower in all combination groups than CG, more animals in these groups required rescue analgesia compared to MG. This indicates that the postoperative analgesic effect of all drugs, either alone or in combination, confers analgesia, although the combinations did not promote greater analgesia. Conclusions Continuous intravenous infusion of maropitant, lidocaine, and ketamine alone induces postoperative analgesic effect in cats undergoing ovariohysterectomy, but combinations of these drugs did not increase the analgesic effect. No adverse effect was observed with any drug or their combination.

For processing the development of psychological dependency, opioid reinforcement, and opiate-related associative reward, learning, and memory in the brain, the ventral tegmental area (VTA) is considered the key zone. As the responsible region for the morphine role in conditioned place preference (CPP), this area has an important role. So, the present research was conducted to investigate the effects of different intensities of electrical stimulation on VTA utilizing CPP, with two morphine doses. Reversible inactivation of VTA was performed via bilateral microinjection of Lidocaine into this area with two implanted separate cannulas. Our findings indicated that 5 mg/kg morphine-induced CPP was suppressed by 150 μA VTA electrical stimulation. The results also showed that bilateral Intra-VTA administration of Lidocaine significantly decreased the 5 mg/kg morphine-induced CPP acquisition phase in comparison with their respective sham group, which reversed in the reinstatement test. It should be concluded that these findings are important for the detection of mesolimbic nervous system ties and could help to find new ways to attenuate the rewarding action of morphine.

Lidocaine is the most commonly used local anesthetic (LA) agent in various dental as well as oral and maxillofacial procedures. Although rare, adverse effects and allergic reactions to lidocaine have been reported. In patients with suspected allergy to LA or a history of such reaction, careful history-taking and allergy testing should be performed to choose an alternative LA agent to avoid any adverse effects. Here, we present two cases of delayed hypersensitivity reaction to lidocaine, wherein the patients presented with erythema, edema, and itching. Intradermal testing confirmed allergic reaction to lidocaine, and the patients underwent successful dental treatment using an alternative LA agent. This report highlights the importance of allergy testing prior to LA use considering the serious consequences of allergy to these agents and describes the management of such patients using an alternative LA agent.

Peripheral intravenous catheter (PIVC) insertion is one of the most painful procedures pediatric patients undergo during hospitalization. To date, local anesthetics delivered via cream, patch, and needle-free injection have not been rigorously evaluated together. This study aimed to investigate feasibility and potential efficacy of local anesthetics on pain intensity during PIVC insertion in an unblinded, single-center, randomized clinical pilot trial. Between March 2017 and February 2020, 88 hospitalized children aged 12 months to 18 years in an acute pediatric unit at an academic medical center were randomized to 1 of 3 local anesthetics: 1) lidocaine/prilocaine cream, 2) lidocaine/tetracaine patch, and 3) unbuffered lidocaine needle-free injection. Feasibility outcomes were recruitment and protocol adherence. Pain intensity was measured using the Face, Legs, Activity, Cry, Consolability (age

The present study was designed to compare the effects of lidocaine and ropivacaine in intravenous regional anaesthesia (IVRA) in dogs. Twelve adult male dogs were used. Under isoflurane anaesthesia, exsanguination was performed in the target forelimb. Then, a blood pressure cuff was encircled around the limb proximal to the elbow joint with a pressure of approximately 150 mmHg above the mean arterial blood pressure. The animals then received one of the two treatments of lidocaine (3 mg/kg) or ropivacaine (1.5 mg/kg) with a final volume of 0.6 mL/kg into the cephalic vein. After 60 min, the anaesthesia was disrupted and the tourniquet was removed using intermittent opening (30 s) and closing (5 min) manner for three times. The results revealed that at 20 and 30 min after the initiation of IVRA, the dogs in ROP showed higher analgesia than LID. A leakage under the tourniquet during IVRA was detected. Tremor and hypersalivation were observed after tourniquet removal in some dogs. It was concluded that ropivacaine might provide a higher quality of anaesthesia than lidocaine in IVRA in dogs. The development of local anaesthetic toxicity is a major concern and should be considered at the time of tourniquet removal., The effects of lidocaine and ropivacaine in intravenous regional anaesthesia (IVRA) in dogs were investigated. The results showed that ropivacaine provided a better quality of analgesia than lidocaine. Leakage under the tourniquet during IVRA was detected. Tremor and hypersalivation were observed after tourniquet removal in some dogs.

Objective To evaluate the effects of dexmedetomidine administered perineurally or intramuscularly (IM) on sensory, motor function and postoperative analgesia produced by lidocaine for sciatic and femoral nerve blocks in dogs undergoing unilateral tibial tuberosity advancement surgery. Study design Prospective, blinded, clinical study. Animals A group of 30 dogs. Methods Dogs were anaesthetized with acepromazine, propofol and isoflurane in oxygen/air. Electrolocation-guided femoral and sciatic nerve blocks were performed: group L, 0.15 mL kg–1 2% lidocaine (n = 10); group LDloc, lidocaine and 0.15 μg kg–1 dexmedetomidine perineurally (n = 10); group LDsys, lidocaine and 0.3 μg kg–1 dexmedetomidine IM (n = 10). After anaesthesia, sensory blockade was evaluated by response to forceps pinch on skin innervated by the saphenous/femoral, common fibular and tibial nerves. Motor blockade was evaluated by observing the ability to walk and proprioception. Analgesia was monitored with Short Form of Glasgow Composite Pain Scale for up to 4 hours after extubation. Methadone IM was administered as rescue analgesia. Data were analysed by linear mixed effect models and Kaplan-Meier test (p Results Median duration of the sensory blockade for all nerves was longer (p Conclusions and clinical relevance Dexmedetomidine administered perineurally with lidocaine prolonged sensory blockade and analgesia during the immediate postoperative period. Systemic dexmedetomidine also prolonged the sensory blockade of perineural lidocaine.

Xuehai Guan,1,&ast; Ziyin Jiao,1,&ast; Xiaofang Gong,1 Huiyu Cao,1 Susu Liu,1 Hongmeng Lan,1 Xiaofang Huang,1 Yanmeng Tan,1 Bing Xu,2 Chengxin Lin1 1Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People’s Republic of China; 2Department of Rehabilitation, The People`s Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, People’s Republic of China&ast;These authors contributed equally to this workCorrespondence: Xuehai Guan; Chengxin LinDepartment of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, 530021, People’s Republic of ChinaTel/Fax +86-771-5356250Email guan_xh@aliyun.com; lin.chx@163.comBackground: Propofol-induced injection pain (PIP) is a well-known problem in general anesthesia. We hypothesized that pre-treatment with remimazolam prevents PIP in patients undergoing abortion or curettage.Materials and Methods: In this prospective, single-center, double-blinded, randomized, placebo-controlled clinical trial, adult patients aged 18 to 60 undergoing abortion or curettage were randomly assigned to three groups. Group Lido received system lidocaine (a bolus of 0.5 mg kg− 1, iv). Group Remi received remimazolam (a bolus of 0.1 mg kg− 1, iv). Group NS received identical volumes of 0.9% normal saline. Sixty seconds after the injection of lidocaine, remimazolam or saline, patients were injected with propofol at a rate of 12 mL/min until the loss of consciousness. The primary outcome was the incidence of PIP at the time of induction using 4-point scale. Secondary outcomes included propofol-induced injection pain, vital signs, the characteristics of anesthesia and surgery, and adverse events.Results: The incidence of patients with PIP was higher in group NS than that in group Lido and group Remi (75.7, 44.3, and 42.9%, respectively, p < 0.001). The percentages of patients with moderate PIP were higher in group NS than that in group Lido and group Remi (20.0, 2.9, and 1.4%, respectively, p < 0.001). Moreover, the consumption of propofol and the incidence of adverse event (hypoxemia and chin lifting) in group Remi were lower than that in group NS and Lido, and less patients got physical movement and cough in group Remi. The recovery time in group NS was longer than that in group Lido and Remi.Conclusion: Our findings indicate that pre-treatment with remimazolam reduced the incidence and intensity of PIP in abortion or curettage patients, equivalent to that of lidocaine without severe adverse effects.Trial Registration: Chinese Clinical Trial Registry (identifier: ChiCTR2100041805).Keywords: lidocaine, remimazolam, propofol injection pain, abortion, curettage

Peripheral venous cannulation (PVC) is a commonly performed invasive medical procedure. Topical treatments such as the eutectic mixture of local anaesthetics (EMLA®, Aspen Pharmacare Australia Pty Ltd, St Leonards, NSW) attenuate the associated pain, but are limited by requiring up to one hour of application before becoming effective. The Coolsense® (Coolsense Medical Ltd., Tel Aviv, Israel) pain numbing applicator is a new device using a cryoanalgesic means to anaesthetise skin within seconds. Coolsense is being increasingly used for cannulation, but comparative studies are lacking. We recruited 64 healthy adult volunteers to this open-label two sequence, two period randomised crossover trial. Participants had two 20 gauge venous cannulae inserted, one on the dorsum of each hand. Each cannulation attempt was preceded by treatment with Coolsense or an EMLA patch containing 2.5% lidocaine and 2.5% prilocaine. The primary outcome was participant pain using the 0–10 numerical pain rating scale. Secondary outcomes were participant satisfaction scores on a 0–10 scale, treatment preference, and failed cannulation attempts. Participants were randomly assigned to either the Coolsense EMLA ( n = 32) or EMLA Coolsense ( n = 32) sequence. All participants completed the trial. The pooled mean paired difference of the numerical pain rating scale was –1.84 (95% confidence intervals –1.28 to –2.41; P

Lidocaine (Lido) is an amide local anesthetic that has both excitatory and inhibitory effects on the central nervous system, and is one of a group of commonly used local nerve block drugs that are used in the clinic. However, traditional Lido does not meet the transdermal performance requirements of surface anesthetic agents for treating pain in patients. Optimizing the preparation of a Lido transdermal preparation and improving the control of anesthetic depth and efficiency has become a challenge in the field of topical anesthesia. In this study, a new type of Lido nano-transdermal preparation, carboxymethyl chitosan-modified lidocaine liposomes (Lido-CMCSNLP), were constructed based on nano-liposomes. Carboxymethyl chitosan can enhance the permeability of hydrophilic macromolecular pathways by interacting with negatively charged membrane glycoproteins, which is beneficial for the transdermal absorption of Lido. Therefore, Lido-CMCS-NLP provides a new approach for research in clinical topical anesthesia and perioperative topical analgesics.

BACKGROUND: Bladder cancer is one of the most common malignant tumors among humans and has a high mortality. Clinically, lidocaine is the most commonly used local anesthetic, which can inhibit the proliferation of bladder cancer cells; however, its downstream specific molecular mechanisms are unclear. METHODS: The SwissTarget and TargetNet databases were used to analyze the target of lidocaine. The online public cancer transcriptome database UALCAN was used to analyze the up-regulated genes in The Cancer Genome Atlas Urothelial Bladder Carcinoma (TCGA-BLCA) data collection, and the intersection of the 2 was used to obtain the core target. The only target, isoprenylcysteine carboxylmethyltransferase (ICMT), was obtained by combining the correlation between the target and the clinical information of bladder cancer and the Kaplan-Meier (K-M) survival curve. Then, UMUC3 and T24 cells were selected as research vectors in vitro. Cell proliferation, cell cycle, and apoptosis were detected by cell counting kit-8, colony formation, flow cytometry, and western blotting. RESULTS: Network pharmacology analysis showed that ICMT might be one of the targets of lidocaine, and the expression level of ICMT was closely related to the clinical phenotype of bladder cancer. Lidocaine treatment (4 and 8 mM) significantly inhibited the proliferation of UMUC3 and T24 cells, promoted apoptosis, and significantly inhibited the mass and volume of xenograft tumors. In vitro experiments showed that ICMT promoted the proliferation of UMUC3 and T24 cells. Lidocaine inhibited the expression of ICMT in UMUC3 and T24 cells in a concentration and time-dependent manner, and inhibited cell proliferation by down-regulating ICMT expression. CONCLUSIONS: Lidocaine exerts anti-tumor effect by down-regulating the expression of ICMT in bladder cancer.

Provoked vestibulodynia is a vulvar pain condition causing sexual dysfunction, affecting 8% to 10% of women. Our recently published randomized clinical trial (N = 108 couples) found that cognitive behavioral couple therapy (CBCT) and topical lidocaine reduced women's pain and associated sexual symptoms, with CBCT showing more benefits. Little is known about pretreatment predictors of treatment outcomes in couples sex therapy. In the current study, we examined women and their partners' pretreatment demographic (age, relationship length), clinical (pain duration, anxiety) and interpersonal (partner responses to pain, sexual goals) predictors/moderators of women's pain intensity, pain unpleasantness, and sexual function at posttreatment and 6-month follow-up. Longer relationship duration, lower anxiety in women, partner higher solicitousness and partner higher approach sexual goals predicted better pain outcomes for women with PVD irrespective of treatment condition. CBCT was more effective than lidocaine for improving women's sexual function at posttreatment when, at pretreatment, women had partners with higher anxiety and women reported lower approach sexual goals, whereas lidocaine was more effective for improving women's sexual function at follow-up when partners had higher approach sexual goals. Findings can assist clinicians in determining what treatment will be most beneficial for whom.

OBJECTIVES: Intravenous lidocaine can alleviate painful diabetic peripheral neuropathy (DPN) in some patients. Whether quantitative sensory testing (QST) can identify treatment responders have not been prospectively tested. METHODS: This was a prospective, randomized, double-blind, crossover, placebo-controlled trial comparing intravenous lidocaine to normal saline (placebo) for painful DPN. Thirty-four participants with painful DPN were enrolled and given intravenous lidocaine (5 mg/kg ideal body weight) or placebo as a 40-minute infusion, after a battery of QST parameters were tested on the dorsal foot, with a three-week washout period between infusions. RESULTS: Thirty-one participants completed both study sessions and were included in the final analysis. Lidocaine resulted in a 51% pain reduction 60-120 minutes after infusion initiation, as assessed on a 0-10 numerical rating scale, while placebo resulted in a 33.5% pain reduction (difference = 17.6%, 95% CI 1.9-33.3%, p = 0.03). Neither mechanical pain threshold, heat pain threshold, nor any of the other measured QST parameters predicted the response to treatment. Lidocaine administration reduced mean Neuropathic Pain Symptom Inventory paresthesia/dysesthesia scores when compared to placebo by 1.29 points (95% CI −2.03 to −0.55, p = 0.001), and paroxysmal pain scores by 0.84 points (95% CI −1.62 to −0.56, p = 0.04), without significant changes in burning, pressing or evoked pain sub-scores. DISCUSSION: While some participants reported therapeutic benefit from lidocaine administration, QST measures alone were not predictive of response to treatment. Further studies, powered to test more complex phenotypic interactions, may be required to identify reliable predictors of response to pharmacotherapy in patients with DPN.

Background The aim of the study was to evaluate the impact of addition of dexmedetomidine or magnesium sulphate to the standard local anesthetics mixture as a primary objective and to compare between both as a secondary objective utilizing the single-injection percutaneous technique for peribulbar block. In this prospective randomized double-blinded clinical trial (RCT), sixty patients, both sexes, aged 45 to 75, with an ASA of I to III, were scheduled for cataract extraction operation. They were divided into three equal groups; each received a single injection peribulbar block of a mixture of 0.5% bupivacaine (3 ml) + 2 percent lidocaine (3 ml) + 120 IU hyaluronidase + (control group (C): 0.5 ml of normal saline; group D: 50 μg of dexmedetomidine; group M: 50 mg of magnesium sulphate in 0.5 ml) with a total injected volume of 7 ml each. The duration of sensory, motor block, need for supplementary doses, hemodynamics, and satisfaction of patients and surgeons were assessed. Results For the primary outcome, both the dexmedetomidine and magnesium groups revealed statistically significant differences from the control group with shorter onsets of sensory block and lid akinesia (p value< 0.001 for both), shorter onset of globe akinesia for dexmedetomidine (p value and for magnesium sulphate (p value=0.022), prolonged duration of lid and globe akinesia and sensory block (p value), better patient satisfaction (p value=0.044) but insignificant difference regarding surgeons’ satisfaction (p value= 0.117) and a less frequent, but statistically insignificant need for supplementary injection (p value=0.075). The demographic and clinical hemodynamics and oxygen saturation parameters were comparable between the three groups. For the secondary outcome, dexmedetomidine was superior to magnesium sulphate regarding onset of globe and lid akinesia (p value= 0.047 and 0.003, respectively), and durations of globe akinesia and sensory block (p value= 0.02 and 0.016, respectively). No complications related to the drugs or procedure were recorded. Conclusions When compared to 50 mg magnesium sulphate, dexmedetomidine at a dose of 50 μg is a superior adjunct to local anesthetic combination in peribulbar block for cataract procedures in terms of start and duration of peribulbar block.

A selective, simple and new reversed phase high performance liquid chromatographic method (HPLC) was developed and validated for simultaneous determination of tinidazole (TIN) and lidocaine (LID) in the ovule dosage form in this study. Developed method was performed with gradient elution by getting C18 (250x4.6mm,5µm) reversed phase HPLC column, mobile phase containing 10mM potassium phosphate buffer (pH3.0), acetonitrile at 1.0 mL/min. Temperatures for column and autosampler were adjusted at 25Cº. The chromatographic separation was carried out at 220 nm wavelength. Retention times were found as 6.5 min for LID and 8.2 min. for TIN. The purity of each substance was evaluated getting a photodiode array detector. The linearity ranges were 75.0-195.0 µg/mL for TIN and 25.0-65.0 µg/mL for LID. The limit of dedection (LOD) and the limit of quantitation (LOQ) results were 0.05625 µg/mL and 0.225 µg/mL for TIN, 0.01875 µg/mL and 0.075 µg/mL for LID, respectively. The simple, sensitive and reproducible method was applied for simultaneous determination of TIN and LID in pharmaceutical preparations successfully.

Background Ultrasonography (US)-guided steroid injections can improve the accuracy of injection in patients with de Quervain disease, especially in those with an intracompartmental septum. Although the main lesion of de Quervain disease in patients with a septum is a stenosing tenosynovitis of the extensor pollicis brevis (EPB), no report we know of has compared injection into the EPB subcompartment with an injection into both the abductor pollicis longus (APL) and EPB subcompartments. In this randomized trial, we compared the results of US-guided steroid injections targeting both subcompartments and the EPB subcompartment alone in patients with de Quervain disease. Questions/purposes (1) Do patients who receive a steroid injection in the EPB subcompartment alone have lower pain scores at 6 weeks and at 3 months after US-guided injection compared with patients who receive an injection in both subcompartments? (2) Do patients who receive a steroid injection in the EPB subcompartment alone experience fewer steroid injection-related complications than patients who receive an injection in both subcompartments? Methods A randomized controlled study was performed at a single center between August 2018 and March 2021. Patients with a diagnosis of de Quervain disease and with a complete intracompartmental septum between the APL and the EPB tendons were included. In total, 112 patients had a diagnosis of de Quervain disease during the study period. Definite, complete subcompartmentalization was seen in 50 patients. Patients were randomly assigned to US-guided injections targeting both subcompartments (n = 25) or the EPB subcompartment alone (n = 25). There were no between-group differences in age, gender, affected wrist, or disease duration, and all patients had US evidence of tendinosis of the EPB, with or without tendinosis of the APL. Although 33% of patients (16 of 48) showed tendinosis of the APL, no patient showed tendinosis of the APL alone. In all patients, a dorsal-to-palmar side injection of 0.5 mL of 2% lidocaine and 0.5 mL of triamcinolone acetonide (40 mg/mL) was administered by two experienced hand surgeons. In the both-subcompartments group, US-guided injections were performed in each of the APL and EPB subcompartments. In the EPB subcompartment group, US-guided injections were administered in the EPB subcompartment only. All patients underwent the same protocol after the procedure. Four percent (n = 2, 1 in each group) of patients were excluded after randomization because their pain level was not registered. Pre- and postinjection clinical outcome assessments were completed by orthopaedic surgery residents not involved in patient management. Patients were regularly examined at baseline, 6 weeks, and 3 months to evaluate the intensity of pain. We assessed pain by the VAS score, where 0 indicated no pain and 100 the most pain. At baseline, the VAS score was 67 ± 14 in the both-subcompartment group and 67 ± 16 in the EPB subcompartment group (mean difference 0.17 [95% CI -8.45 to 8.82]; p = 0.97). Complications related to the steroid injection, including numbness, tendon rupture, and skin hypopigmentation, were also recorded at final follow-up examinations. To determine statistical power, the VAS score for pain at 6 weeks after the injection was used as the primary outcome variable. The minimum clinically important difference for the VAS score was deemed to be 20 mm, and we estimated an SD of 23. A sample size calculation indicated that a sample of 21 patients per group would provide 80% power to detect an effect of this size between the groups at the p = 0.05 level using a t-test. Results There were no differences in the VAS scores between the both-subcompartment group and the EPB group at 6 weeks (10 ± 6 versus 10 ± 7, mean difference -0.08 [95% CI -4.08 to 3.91]; p = 0.97). The same was true at 12 weeks (12 ± 13 versus 11 ± 15, mean difference 0.38 [95% CI -7.74 to 8.49]; p = 0.09). No adverse events related to treatment (such as tendon rupture, infections, and numbness) occurred in either group. However, skin hypopigmentation occurred at the final follow-up examination in both groups. The proportion of patients experiencing skin hypopigmentation in the EPB subcompartment group was lower than in the both-subcompartment group (33% [8 of 24] versus 67% [16 of 24]; odds ratio 0.25 [95% CI 0.08 to 0.83]; p = 0.02). Conclusion Our data suggest that a US-guided steroid injection targeting the EPB subcompartment alone is as effective in terms of pain reduction as targeting both subcompartments in patients with de Quervain disease who have complete septation. Furthermore, an injection targeting the EPB subcompartment alone can reduce the dose of steroids used, perhaps thereby decreasing complications related to steroid injections. We recommend using only single-compartment injections in this context, even among patients with an intracompartmental septum. Level of evidence Level I, therapeutic study.