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Background Surgical stress may lead to postsurgical hypercoagulability, endothelial dysfunction and systemic inflammation, which can impact on patient recovery. Remote ischaemic preconditioning is a procedure that activates the body's endogenous defences against ischaemia and reperfusion injury. Studies have suggested that remote ischaemic preconditioning has antithrombotic, antioxidative and anti-inflammatory effects. The hypothesis was that remote ischaemic preconditioning reduces surgery-induced systemic stress response. Method During a 24-month period (2019–2021), adult patients undergoing subacute laparoscopic cholecystectomy due to acute cholecystitis were randomized to remote ischaemic preconditioning or control. Remote ischaemic preconditioning was performed less than 4 h before surgery on the upper arm. It consisted of four cycles of 5 min ischaemia and 5 min reperfusion. The gene expression of 750 genes involved in inflammatory processes, oxidative stress and endothelial function was investigated preoperatively and 2–4 h after surgery in both groups. In addition, changes in 20 inflammation- and vascular trauma–associated proteins were assessed preoperatively, 2–4 h after surgery and 24 h after surgery. Results A total of 60 patients were randomized. There were no statistically significant differences in gene expression 2–4 h after surgery between the groups (P > 0.05). Remote ischaemic preconditioning did not affect concentrations of circulating proteins up to 24 h after surgery (P > 0.05). Conclusion The study did not demonstrate any effect of remote ischaemic preconditioning on expression levels of the chosen genes or in circulating immunological cytokines and vascular trauma–associated proteins up to 24 h after subacute laparoscopic cholecystectomy in patients with acute cholecystitis. [ABSTRACT FROM AUTHOR]

Myocardial injury after non-cardiac surgery (MINS) is associated with a 2-3-fold increased risk of subsequent major cardiovascular events and postoperative mortality. The pathological mechanism behind MINS is not fully uncovered. We hypothesized that patients with MINS following hip fracture surgery would have an altered haemostatic balance pre- and postoperative compared with patients without MINS. This was investigated in a prospective single-centre observational study including patients consecutively. The outcomes were changes in thrombin generation, fibrinogen/fibrin turnover, tissue plasminogen activator, plasminogen activator inhibitor-1 and fibrin structure measurements in patients developing MINS and patients who did not. Outcomes were measured preoperatively and two hours postoperatively. Seventy-two patients were included whereof 26 (36%) patients developed MINS. D-dimer delta values were significantly higher in patients developing MINS than in patients who did not (p = 0.01). After adjusting for age, sex, smoking, alcohol abuse, atrial fibrillation, anticoagulant medication preoperative CRP, preoperative creatinine and duration of surgery, the association remained significant (p = 0.04). There were no significant changes in thrombin generation, in markers of fibrinogen/fibrin turnover besides D-dimer, or in fibrin structure measurements pre- and postoperatively between patients with and without MINS. As such, a relationship between the coagulative and fibrinolytic activity and MINS cannot be ruled out in patients with MINS after hip fracture surgery. Registration: The study was an observational sub-study to a multicentre randomised clinical trial registered at ClinicalTrials.gov (NCT02344797) [ABSTRACT FROM AUTHOR]

Endothelial dysfunction result from inflammation and excessive production of reactive oxygen species as part of the surgical stress response. Remote ischemic preconditioning (RIPC) potentially exerts anti-oxidative and anti-inflammatory properties, which might stabilise the endothelial function after non-cardiac surgery. This was a single centre randomised clinical trial including 60 patients undergoing sub-acute laparoscopic cholecystectomy due to acute cholecystitis. Patients were randomised to RIPC or control. The RIPC procedure consisted of four cycles of five minutes of ischaemia and reperfusion of one upper extremity. Endothelial function was assessed as the reactive hyperaemia index (RHI) and circulating biomarkers of nitric oxide (NO) bioavailability (L-arginine, asymmetric dimethylarginine (ADMA), L-arginine/ADMA ratio, tetra- and dihydrobiopterin (BH4 and BH2), and total plasma biopterin) preoperative, 2–4 h after surgery and 24 h after surgery. RHI did not differ between the groups (p = 0.07). Neither did levels of circulating biomarkers of NO bioavailability change in response to RIPC. L-arginine and L-arginine/ADMA ratio was suppressed preoperatively and increased 24 h after surgery (p < 0.001). The BH4/BH2-ratio had a high preoperative level, decreased 2–4 h after surgery and remained low 24 h after surgery (p = 0.01). RIPC did not influence endothelial function or markers of NO bioavailability until 24 h after sub-acute laparoscopic cholecystectomy. In response to surgery, markers of NO bioavailability increased, and oxidative stress decreased. These findings support that a minimally invasive removal of the inflamed gallbladder countereffects reduced markers of NO bioavailability and increased oxidative stress caused by acute cholecystitis. [ABSTRACT FROM AUTHOR]

Background: Optimal recovery can be defined as the adequate in‐hospital length of stay with minimal postoperative complications and readmissions. The quality of recovery beyond the immediate postoperative period after major emergency abdominal surgery is yet to be fully described. We hypothesized that long‐term measures of overall recovery were affected after surgery. The study aimed to investigate patient‐focused recovery‐related parameters 1 year after major emergency abdominal surgery. Method: This is a prospective study including patients undergoing major emergency abdominal surgery at a Danish secondary referral center. Three questionnaires were answered regarding the recovery following the procedure; Activities Assessment Scale (AAS); Quality of Recovery‐15 (QoR‐15), and Self‐complete Leeds Assessment of Neuropathic Symptoms and Signs (S‐LANSS). All questionnaires were answered at postoperative days (PODs) 14, 30, 90, and 365. Results: Eighty‐two patients were included, and 68 were available for follow‐up until 1 year after surgery. The response rates differed between the follow‐up time points, with a response rate of 85% (n = 59) at POD30 and 50% (n = 36) at POD365. A decrease in the level of physical function following surgery was observed in 60% of the patients at POD14, which improved to 36% at POD365. Twenty‐four patients (48%) reported postoperative pain at POD14, which declined to 9 (26%) at POD365. The maximum overall recovery was reached at POD30, which remained stable throughout the study period. Conclusion: One in three patients reported physical functional impairment, and one in four patients reported pain 1 year after their surgical procedure. [ABSTRACT FROM AUTHOR]

Background: Endothelial dysfunction seems to play a role in the pathophysiology of myocardial injury after surgery. The aim of this randomised clinical trial was to examine whether remote ischaemic preconditioning in relation to hip fracture surgery ameliorates post‐operative systemic endothelial dysfunction. Methods: This was a planned single‐centre pilot sub‐study of a multicentre, randomised clinical trial. Patients ≥45 years with a cardiovascular risk factor were randomised to remote ischaemic preconditioning (RIPC) or control (standard treatment) performed in relation with their hip fracture operation. RIPC consisted of four cycles of 5 minutes forearm ischaemia and reperfusion. The procedure was performed non‐invasively with a tourniquet. The endothelial function was assessed with non‐invasive digital pulse amplitude tonometry on post‐operative day 1 and expressed as the reactive hyperaemia index (RHI). Endothelial dysfunction was defined as RHI < 1.22. Results: Between February 2015 and December 2016, 18 patients were allocated to the RIPC group and 20 patients to the control group. The endothelial function was impaired in both groups on post‐operative day 1. RHI did not differ between the groups, 1.47 (95% CI 1.20‐1.75) in the RIPC group vs. 1.54 (95% CI 1.17‐1.91) in the control group, P =.76. Endothelial dysfunction was present in 3/18 patients (16.7%) in the RIPC group and 8/20 patients (40%) in the control group, P =.11. Conclusion: No beneficial effect of remote ischaemic preconditioning on the systemic endothelial dysfunction, assessed at a single time point on post‐operative day one, was detected after hip fracture surgery. [ABSTRACT FROM AUTHOR]

Background: The aim was to examine the risk of post-operative myocardial injury after major emergency abdominal surgery and identify pre- and intra-operative risk factors of post-operative myocardial injury. Moreover, the study aimed to examine the association between post-operative myocardial injury and clinical outcomes.Methods: This was a retrospective cohort study including patients undergoing major emergency abdominal surgery from February 2017 to January 2019. Troponin I was assessed on post-operative days 1-3. Post-operative myocardial injury was defined as a cardiac troponin I ≥ 45 ng per litre. Post-operative clinical outcomes included in-hospital myocardial infarction, in-hospital major adverse cardiovascular events, reoperation, admission to the intensive care unit, lengths of stay, 30- and 90-day all-cause mortality.Results: 98 out of 401 patients (24.4%) sustained a post-operative myocardial injury within the third post-operative day. Increasing age was an independent risk factor of post-operative myocardial injury (age per 10 years adjusted odds ratio 2.2 [95% CI 1.7-2.9], P < .0001). Patients with post-operative myocardial injury had an increased risk of major adverse cardiovascular events, a higher admission rate to the intensive care unit, a longer median post-operative length of stay and a higher 30- and 90-day all-cause mortality compared with patients without myocardial injury.Conclusion: One in four patients suffered a post-operative myocardial injury within the third post-operative day. Post-operative myocardial injury was a risk factor of adverse cardiac and non-cardiac clinical outcomes. Troponin monitoring could potentially improve the post-operative risk stratification in this cohort of high-risk surgical patients. [ABSTRACT FROM AUTHOR]

Background and purpose — In Denmark, 44 per 10,000 persons over the age of 50 years suffered a hip fracture (HF) in 2011. We characterized the patients and identified risk factors associated with 30-day, 90-day, and 1-year postoperative mortality in Denmark from 2000 to 2014. Patients and methods — The study builds upon data from the Danish National Patients Register and the National Causes of Death Register including all acute hospitalized HF patients aged 18 years and above. Outcomes were 30-day, 90-day, and 1-year postoperative mortality. Mortality risk was analyzed with a univariable and multivariable Cox regression including predefined variables. Results — 113,721 acute hospitalized HF patients were admitted to Danish hospitals between 2000 and 2014. The 30-day mortality risk was 9.6%, 16% at 90 days, and 27% at 1 year after HF surgery. Mortality risk was similar from 2000 to 2014 while the median lengths of stay declined from 14 (IQR 8–25) to 8 (IQR 5–11) days. Male sex, increasing age, higher Charlson Comorbidity Index, per- and subtrochanteric fracture, and operation type other than total hip arthroplasty were independently associated with postoperative mortality. Interpretation — Short- and long-term mortality was high after hip fracture surgery and did not decline in Denmark from 2000 to 2014. [ABSTRACT FROM AUTHOR]

Background: The aim of this register-based cohort study was to characterize patients admitted to the intensive care unit (ICU) following non-cardiac surgery and identify risk factors associated with 30-days, 90-days and 1-year mortality after ICU admission.Methods: Patients aged 18+ years admitted to the intensive care unit within 30-days of non-cardiac surgery at four Capital Region hospitals in Denmark between January 2005 and December 2014 were included. Patients were identified through the Danish National Patient Register. The outcomes were 30-days, 90-days and 1-year mortality after ICU admission. Unadjusted and multivariate logistic regression analyses were performed to identify independent risk factors of mortality.Results: The study included 3311 ICU patients. Gastrointestinal surgery accounted for 71.3%, orthopaedic surgery for 18.4% and urologic surgery for 10.2% of the population. For the total population, the median length of stay in hospital was 18 days (9-36, 25th-75th percentile) and 2 days (1-4, 25th-75th percentile) in the ICU. Thirty-days, 90-days and 1-year mortality were 37.8%, 44.5% and 51.2% respectively. Mortality within the ICU was 22.3% while the post-ICU in-hospital mortality was 19.4%. Higher age, comorbidity, delayed ICU admission, acute surgery, and gastrointestinal and orthopaedic surgery increased 30-days, 90-days and 1-year mortality.Conclusions: Short- and long-term mortality in non-cardiac surgical patients admitted to the ICU is very high, especially among the elderly comorbid patients undergoing acute surgery. Future research should focus on targeting clinically modifiable risk factors and performing tailored treatment for these high-risk patients. [ABSTRACT FROM AUTHOR]

Background: ABO dependent variation in von Willebrand factor (vWF) and factor VIII have an impact on hemostasis. Several contradictory studies have investigated the influence of ABO blood type in surgical hemorrhage. Emergency surgery is associated with an increased risk of perioperative hemorrhage leading to inferior clinical outcomes. The aim of this study was to investigate if patients with blood type O received more transfusions with blood components compared with non-O patients after major emergency abdominal surgery.Study Design and Methods: This retrospective observational study combined perioperative data including hemoglobin with transfusion data in patients undergoing emergency surgery at a university hospital between January 2010 and October 2016. The primary outcome was postoperative transfusion stratified into early transfusion, within 24 hours after surgery, and late transfusion from 24 hours to 7 days (POD7) after surgery.Results: A total of 869 patients were included, 363 patients with blood type O (42.0%) and 501 (58.0%) with blood type non-O. We found no difference in the need for transfusion with 42 (11.6%) patients with blood type O and 66 (13.2%) patients with blood type non-O receiving early transfusion and 39 (13.4%) and 48 (11.9%) of O and non-O patients, respectively, receiving late transfusion. Multivariate logistic regression analysis showed an adjusted OR of 0.915 (95% CI 0.569-1.471) for early transfusion and an adjusted OR of 1.307 (95% CI 0.788-2.169) for late transfusion in patients with blood type O. Likewise, no difference was seen with respect to the change in hemoglobin levels before and after surgery as well as transfused volume.Conclusion: We did not find an association between transfusion or perioperative changes in hemoglobin with respect to blood type ABO. [ABSTRACT FROM AUTHOR]

INTRODUCTION Major emergency abdominal surgery results in a high risk of morbidity and mortality. Preoperative neutrophil-to-lymphocyte ratio (NLR) has been proposed as a predictor of post-operative outcomes in elective surgery. The aim of the present study was to examine whether preoperative NLR was associated with post-operative morbidity and mortality after major emergency abdominal surgery. METHODS We conducted a retrospective cohort study of patients undergoing major emergency abdominal surgery in two university hospitals in Denmark between 2010 and 2016. Associations between preoperative NLR and 30-day post-operative complications and mortality were established through multivariate logistic regression and receiver-operating characteristics (ROC) analysis. RESULTS A total of 570 patients were included in the study. The overall 30-day mortality was 9.3% and 59.3% had post-operative complications. The median preoperative NLR was 8.6 (interquartile range: 4.8-14.7). Although NLR was higher in the group of patients who had complications or died after surgery, a multivariate analysis showed that the NLR was not associated with 30-day post-operative complications (odds ratio (OR) = 1.01 (95% confidence interval (CI): 0.99-1.02); p = 0.424) or mortality (OR = 0.99 (95% CI: 0.97-1.02); p = 0.57). The ROC analysis showed an area under the curve of 0.55 and 0.60 for 30-day post-operative complications and mortality, respectively. CONCLUSIONS Preoperative NLR was not associated with 30-day post-operative complications and mortality in patients undergoing major emergency abdominal surgery.  FUNDING none. TRIAL REGISTRATION not relevant., (Articles published in the DMJ are “open access”. This means that the articles are distributed under the terms of the Creative Commons Attribution Non-commercial License, which permits any non-commercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.)

Background: Major emergency abdominal surgery results in high morbidity and mortality. We aimed to describe patient-reported quality of recovery after major emergency abdominal surgery., Methods: A prospective observational cohort study of patients undergoing major emergency abdominal surgery at a University Hospital was conducted in the period between November 2016 and February 2017. Patients were interviewed using the 15-item questionnaire Quality of Recovery (QoR-15) six times over the first 30 postoperative days. Patients' maximum score of QoR-15 ranging from 0-150 were divided into four groups depending on recovery status going from poor (score of 0-89), moderate (score of 90-121), good (score of 122-135) to excellent (score of 136-150) recovery., Results: A total of 37 patients were included in the trial. At postoperative day (POD) 1 the recovery status of the patients was mainly poor to moderate (poor N.=8 [22%], moderate N.=23 [62%], good N.=4 [11%] and excellent N.=2 [5%]). Sixteen (55%) of the patients reported a poor or moderate recovery within the first 7 days after surgery, which advanced to good or excellent recovery (N.=19 [68%]) from POD 14. The patients were not fully recovered at POD 30 (N.=18 [62%] had an excellent recovery)., Conclusions: Recovery measured by QoR-15 is substantially affected after major emergency abdominal surgery even after 14- and 30 days postoperatively. The patients were poor or only moderately recovered within the first seven postoperative days and only 62% of the patients were fully recovered at postoperative day 30.

Introduction: Emergency laparotomy is a high-risk procedure associated with severe post-operative morbidity and high mortality. The aim was to conduct a nationwide cohort consisting of all patients undergoing emergency laparotomy during an 11-year period and to examine both short- and long-term outcomes., Methods: Adult patients treated with emergency laparotomy due to gastrointestinal conditions from 2003 through 2013 were identified in the Danish National Patient Register. Demographic data and surgical outcomes were identified in nationwide registers., Results: A total of 47,300 patients were included in the study. Hereof, 15,015 patients underwent minor laparotomy (open appendectomy or cholecystectomy) and the rest underwent major laparotomy (n = 32,285). In all, 8,193 patients (17.3%) were readmitted within 30 days from surgery, whereas 7,521 patients (15.9%) underwent gastrointestinal reoperation. A total of 10,944 patients (23.1%) experienced a post-operative complication. The post-operative mortality at 7, 30, 90 and 365 days was 8.5%, 13.3%, 16.9% and 21.9%, respectively. When excluding minor laparotomies (open appendectomy and cholecystectomy), the 7-, 30-, 90- and 365-day mortality was 12.1%, 18.7%, 23.6% and 30.5%, respectively., Conclusions: More than one in every five patients died within one year after undergoing emergency laparotomy, and mortality rates were even higher when excluding minor laparotomies as almost one in every three patients died within one year., Funding: This study received support from the Frimodt-Heinecke Foundation and from the foundation Manufacturer Frands Køhler Nielsens and wife memorial fund., Trial Registration: The study was registered with Researchregistry.com (Id no: researchregistry2930)., (Articles published in the DMJ are “open access”. This means that the articles are distributed under the terms of the Creative Commons Attribution Non-commercial License, which permits any non-commercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.)