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Κυριακή 24 Ιανουαρίου 2021

Cricothyroidotomy competence and injuries using nonmedical equipment: A crossover noninferiority randomised controlled trial in a porcine cadaver model

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BACKGROUND International guidelines recommend cricothyroidotomy as a life-saving procedure for 'cannot intubate, cannot ventilate' situations. Although commercially available sets facilitate surgical cricothyroidotomy, regular training seems to be the key to success. OBJECTIVES The goal was to investigate if trained anaesthetists are able to transfer their skill in one surgical cricothyroidotomy technique to another. The primary hypothesis postulated that trained anaesthetists could perform an emergency cricothyroidotomy equally fast and successfully with a pocketknife compared with a surgical cricothyroidotomy set. DESIGN Crossover noninferiority randomised controlled trial. SETTING After written informed consent and ethics committee approval, this single-centre study was performed at the University Hospital of Bern, Bern, Switzerland. PARTICIPANTS Altogether, 61 study participants already familiar with surgical cricothyroidotomy were included. INTERVENTION The use of a commercially available cricothyroidotomy set was compared with a short-bladed pocketknife and ballpoint pen barrel. A pig-larynx cadaver model including trachea, with pig skin overlaid, was used. Participants underwent additional training sessions in both procedures. MAIN OUTCOME MEASURES The primary outcome was the time necessary to position the tracheal tube or pen barrel in the trachea. Other outcome parameters were success rate, tracheal and laryngeal injuries and preferred device. RESULTS Cricothyroidotomy with the pocketknife was performed significantly faster and equally successfully as compared with the cricothyroidotomy sets. Tracheal and laryngeal injuries were similar in both groups. Paratracheal or submucosal placement of the pen barrel occurred in 32%, compared with 29% for the tracheal tube. Sixty-six per cent of participants preferred the cricothyroidotomy set. CONCLUSION Regularly trained anaesthetists are able to accomplish cricothyroidotomy irrespective of the equipment used. A pocketknife with a ballpoint pen barrel was just as effective as a commercially available surgical set. TRIAL REGISTRATION Not applicable. Correspondence to Sabine Nabecker, Staff Physician, Department of Anaesthesiology and Pain Medicine, Bern University Hospital and University of Bern, Freiburgstrasse, 3010 Bern, Switzerland E-mail: sabine.nabecker@insel.ch © 2021 European Society of Anaesthesiology
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