A low-cost video laryngoscope (VDL) called Hybrid 1.0 was developed using smart devices for visualization. To test its performance, we compared it with a high-end VDL device, using both in vitro and in vivo studies. During the in vitro study, medical students without experience in airway intubation were randomly asked to intubate a mannequin with different degrees of difficulty (Cormack–Lehane scales) by using either the Hybrid 1.0 VDL (GI) or a conventional laryngoscope (GII). During the in vivo study, N = 60 endotracheal intubations were performed by resident and base physicians, divided into two groups; the first group intubated with the Hybrid 1.0 VDL (GI) while the second group used a VDL C-Mac shovel (GII). As performance indexes, both studies reported the number of successful intubations (correct capnography signal) and intubation time. For the in vitro testing, no statistically significant differences were found regarding the number of successful intubations, while statistically significant differences were found regarding the intubation times. During the in vivo tests, procedures were performed by residents and by base physicians, and no statistically significant differences were found. The provided results point out that the VDL proposed can be clinically useful and offers technical characteristics similar to other VDLs that currently exist on the market.
RESUMEN. Introducción: la tos es una respuesta fisiológica de protección de la vía aérea, produce aerosoles que se identifican por imagen y alcanza una velocidad de hasta ocho metros por segundo. La extubación produce tos, hipertensión, taquicardia, apnea y laringoespasmo, existen métodos para minimizar su aparición. Debido a la pandemia de COVID-19 se han utilizado como profilaxis del reflejo tusígeno, la lidocaína intravenosa y el bloqueo del nervio laríngeo superior. El objetivo fue compararlos en la inhibición de la tos. Material y métodos: se seleccionaron pacientes entre 18-60 años, cirugía electiva con anestesia general balanceada, ASA 1-3, con intubación menor a tres horas. Se aleatorizó un total de 90 pacientes, 45 en cada grupo, se eliminó un total de 10 pacientes por presentar inestabilidad hemodinámica al final de la cirugía o por no administrar dosis intravenosa de lidocaína en el tiempo establecido. Resultados: no hubo diferencia estadísticamente significativa en el número de pacientes que presentaron tos en ambos grupos (13 vs 10, p = 0.4684), de éstos se obtuvo una diferencia estadísticamente significativa en el número de decibeles a favor del grupo de bloqueo (75.6 vs 67, p < 0.001). Conclusiones: el bloqueo (selectivo) presenta menos aerolización que la lidocaína intravenosa en la extubación.
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