Análisis de los factores de intubación difícil en cirugía bariátrica. Influencia en la elección del bloqueante neuromuscular de la disponibilidad de sugammadex

Abstract

ObjectiveTo determine the incidence of difficult tracheal intubation (DTI), as well as predictive factors for DTI and what influences the choice of the neuromuscular blocking agent (succinylcholine or rocuronium). MethodsThis is an observational, prospective study on consecutive bariatric surgery patients. Tracheal intubation was performed by direct laryngoscopy with a preformed tracheal tube. DTI was considered when there was a Cormack-Lehane classification of iii-iv or when it was necessary to apply the DTI algorithm, which consisted in the use of Frova guide, and Airtraq video-laryngoscope as second choice, and finally awaking the patient and sugammadex reversal if rocuronium was the selected neuromuscular blocking agent. Thereafter, tracheal intubation was performed using an awake fibroscopic technique ResultsOne hundred and sixty six patients were included. In one case, conscious fiberscope tracheal intubation was performed. Succinylcholine was selected for 14 patients, and rocuronium for 151 patients. Fifteen patients had a DTI (9%): in 4 Airtraq was deemed necessary. One patient received sugammadex to reverse neuromuscular blockade. Conscious tracheal intubation represented 1.2% (95% CI; 0.3-4%). DTI was associated with Mallampati score of 3-4 (odds ratio, 3 [95% CI; 1.37-6.8], sensitivity of 33%, specificity of 91%) and with thyromental distance<6cm (odds ratio, 4.8 [95% CI; 1.45-16]; sensitivity of 53%; specificity of 79%). ConclusionRescue airway protocol with Frova and Airtraq avoided the use of sugammadex, except in one patient.