ABSTRACT
INTRODUCTION: With the COVID pandemic, and recently updated practice guidelines for neuromuscular infusion (NMBI) use during ARDS, the practices/perceptions of ICU physicians regarding NMBI use during ARDS may not be evidence-based. METHODS: We developed, tested, and electronicallyadministered a questionnaire (9 questions/70 subquestions) to medical and surgical ICU fellow and attending physicians at 3 geographically-diverse U.S. health systems (U Arizona, U Chicago, Mass General Brigham). The IRB-approved questionnaire focused on adults with moderate-severe ARDS (PaO2:FiO2 < 150) with critical hypoxemia where dyssynchrony causes were addressed and PEEP optimized. Weekly reminders were sent twice. RESULTS: Respondents [173/342(50.5%)] primarily worked as an attending 117(75%) in a medical ICU 94(60%) for 12±8 weeks/year. COVID+ ARDS patients were twice as likely to receive a NMBI (56±37 vs. 28±19%;p< 0.01). Respondents somewhat/strongly agreed a NMBI: should be reserved until after a trial of deep sedation 142 (82%) or proning 59 (34%), be dose-titrated based on trainof- four monitoring 107(62%);and effectively reduced dyssynchrony 149(86%), plateau pressure 106(62%) and barotrauma 102(60%). Few respondents [23(18%)] somewhat/strongly agreed a NMBI should be initiated at ARDS onset 20(12%) or administered at a fixed-dose 12(7%). Only 2/14 potential NMBI risks were frequently reported to be of high/very high concern: prolonged muscle weakness during steroids 135(79%) and paralysis awareness due to inadequate sedation 114(67%). Only absence of dyssynchrony 146(87%) was frequently reported to be a very/extremely important NMBI titration target. Train-of-four 78(46%) and BIS 39(23%) monitoring and plateau pressure 67(40%) or PaO2:FiO2 64(38%) evaluation were deemed less important. Absence of dysschrony 93(56%) and use ≥48 hours 87(53%) were preferred NMBI stopping criteria. For COVID+ patients, few felt reduced self-extubation and COVID aerosolization during reintubation 16(9%) or reduced ventilator adjustments 7(5%) were very/extremely important reasons for NMBI use. CONCLUSIONS: Most physicians agree NMBI infusions in ARDS should be reserved until after trials of deep sedation. Paralysis awareness and prolonged muscle weakness are the greatest NMBI use concerns. Unique considerations in COVID+ ARDS patients exist.