Feasibility of Performing Rapid Sequence Intubation During Helicopter Flight in an AW169: A High-Fidelity Pilot...

Rapid sequence intubation (RSI) in helicopter emergency medical services (HEMS) is conventionally performed at the scene before transport, potentially delaying time to definitive care. The feasibility of performing RSI during flight in civilian HEMS operations has not been established in the United Kingdom. We evaluate the feasibility, safety, and temporal efficiency of performing simulated in-flight RSI in an AW169 helicopter under operational flight conditions.

A prospective proof-of-concept study using high-fidelity simulation was conducted across 2 phases (May 2023, January 2025) at the Air Ambulance Charity Kent Surrey Sussex. Eight simulations were completed by 4 distinct clinical teams comprising operationally experienced HEMS physicians and paramedics. Scenarios replicated a standardized traumatic brain injury scenario requiring RSI during the return transit phase. The primary outcome was time from RSI checklist initiation to confirmed intubation. Secondary outcomes included overall mission times, safety events, and crew-perceived feasibility assessed via post-scenario questionnaires.

All simulations (8/8, 100%) achieved successful first-pass intubation. Median time from checklist initiation to confirmed intubation was 5 minutes (interquartile range [IQR]: 5-7). Median total mission time from base departure to RSI completion was 42 minutes (IQR 40-44). No safety events, procedural complications, or communication failures occurred. Crew questionnaires (93% response rate) confirmed unanimous perceived feasibility, with participants identifying adequate workspace, effective communication, and manageable equipment accessibility.

High-fidelity simulation demonstrates that in-flight RSI is technically feasible in an AW169 helicopter, with consistent procedural times and no safety events. These findings may support further evaluation of in-flight RSI as a complementary strategy for time-critical patients where scene-based airway management may delay definitive care.