PubMed · 11121942
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D R Ball, D Williams, P Jefferson. 2000. Cricothyroidotomy comments.. https://doi.org/10.1046/j.1365-2044.2000.01798-9.x
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We describe the prevalence, primary indications and immediate complications of emergency cricothyrotomy (cric) techniques, in a single institution's Emergency Department (ED) and associated air-medical transport service. This is a retrospective review at an academic, level-one trauma center with an annual ED census of 65,000 and an associated air-medical transport service (AMTS). All patients undergoing cric in the field or in the ED between July 1995 and June 2000 were included. Expert reviewers from Emergency Medicine, Trauma Surgery and the AMTS prospectively defined the complication criteria. All charts with a possible complication underwent a blinded evaluation by reviewers representing each of the three clinical services. Descriptive statistics were used to summarize the data. Fifty crics were performed over 5 years. Seventy-six percent of crics were performed in trauma patients. The prevalence of cric in patients requiring airway management in the ED was 1.1% (95% CI, 0.7-1.6) and 10.9% (95% CI, 6.9-16.1) in the field by the AMTS. The prevalence of complications was 14% (95% CI, 4-32.6) in ED patients and 54.5% (95% CI, 32-75.6) for prehospital patients. The overall inter-rater agreement for complication rate was excellent (kappa =.87). Overall, 77% of crics were performed using the rapid four-step technique (RFST). There were no reports of complications associated with the RFST when performed in the ED. Non-RFST crics in the ED had an associated complication rate of 25% (95% CI, 2.8-60). Emergency cricothyrotomy was performed in approximately 1% of all emergency airway cases in the ED and at a higher rate by the AMTS. The most frequent indications were trauma related. Additionally, the RFST was the most commonly used technique for cric at this institution. The complication rate of cric was significantly higher in the prehospital environment than in the ED.
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BACKGROUND: The relationship between the larynx and the subclavian arteries was studied in a series of magnetic resonance images (MRIs) from 50 patients without neck pathology. METHODS: The vertical distances of the excursion of the subclavian arteries into the neck was measured, as was the distance from the cricoid cartilage to the highest point of this excursion. Statistical analysis allows the probability of any given cricoid-subclavian distance occurring in the population to be estimated. RESULTS: The mean (SD) excursion of the right subclavian artery above the clavicle was 10.4 (11.4) mm. The mean (SD) distance from the cricoid cartilage to the right subclavian artery was 30.6 (14.3) mm, and the data showed a high degree of variance. There was a linear relationship between neck length and cricoid-subclavian distance (r=0.58), which explained some of the variance in the latter, but there was also wide individual variance, which was independent of this regression. CONCLUSIONS: When performing a percutaneous tracheostomy, a 'safe' distance between the incision site and subclavian artery cannot be assumed or reliably predicted from the neck length.