1. Ultrasound Improves Cricothyrotomy Success in Cadavers with Poorly Defined Neck Anatomy: A Randomized Control Trial.
- Author
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Siddiqui, Naveed, Arzola, Cristian, Friedman, Zeev, Guerina, Laarni, and You-Ten, Kong Eric
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LARYNGEAL surgery , *NECK anatomy , *ANESTHESIA , *CARTILAGE , *COMPARATIVE studies , *CRICOTHYROTOMY , *DEAD , *INTERNSHIP programs , *INTUBATION , *LARYNX , *RESEARCH methodology , *MEDICAL cooperation , *NECK , *PALPATION , *RESEARCH , *ULTRASONIC imaging , *EVALUATION research , *TRACHEAL cartilage , *RANDOMIZED controlled trials , *TREATMENT effectiveness , *SURGERY - Abstract
Background: Misidentification of the cricothyroid membrane in a "cannot intubate-cannot oxygenate" situation can lead to failures and serious complications. The authors hypothesized that preprocedure ultrasound-guided identification of the cricothyroid membrane would reduce complications associated with cricothyrotomy.Methods: A group of 47 trainees were randomized to digital palpation (n = 23) and ultrasound (n = 24) groups. Cricothyrotomy was performed on human cadavers by using the Portex device (Smiths Medical, USA). Anatomical landmarks of cadavers were graded as follows: grade 1-easy = visual landmarks; 2-moderate = requires light palpation of landmarks; 3-difficult = requires deep palpation of landmarks; and 4-impossible = landmarks not palpable. Primary outcome was the complication rate as measured by the severity of injuries. Secondary outcomes were correct device placement, failure to cannulate, and insertion time.Results: Ultrasound guidance significantly decreased the incidence of injuries to the larynx and trachea (digital palpation: 17 of 23 = 74% vs. ultrasound: 6 of 24 = 25%; relative risk, 2.88; 95% CI, 1.39 to 5.94; P = 0.001) and increased the probability of correct insertion by 5.6 times (P = 0.043) in cadavers with difficult and impossible landmark palpation (digital palpation 8.3% vs. ultrasound 46.7%). Injuries were found in 100% of the grades 3 to 4 (difficult-impossible landmark palpation) cadavers by digital palpation compared with only 33% by ultrasound (P < 0.001). The mean (SD) insertion time was significantly longer with ultrasound than with digital palpation (196.1 s [60.6 s] vs. 110.5 s [46.9 s]; P < 0.001).Conclusion: Preprocedure ultrasound guidance in cadavers with poorly defined neck anatomy significantly reduces complications and improves correct insertion of the airway device in the cricothyroid membrane. [ABSTRACT FROM AUTHOR]- Published
- 2015
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