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Roy Fischer BHB, MBChB, FCICM, PGDipCU, Paul F Lambert BSc (Hons), PhD, BMBS, FANZCA, GradCertAeromedRetRoy Fischer BHB, MBChB, FCICM, PGDipCU, Paul F Lambert BSc (Hons), PhD, BMBS, FANZCA, GradCertAeromedRet
Abstract 
Introduction
Hypothermia is a well-recognised finding in trauma patients, which can occur even in warmer climates. It is an independent predictor of increased morbidity and mortality. It is associated with pre-hospital intubation, although the reasons for this are likely to be multifactorial. Core temperature drop after induction of anaesthesia is a well-known phenomenon in the context of elective surgery, and the mechanisms of this are well established.
Methods
We conducted a prospective observational study to examine the behaviour of core temperature in patients undergoing pre-hospital anaesthesia for traumatic injuries.
Results
Between 2017 and 2021 data were collected on 48 patients. The data from 40 of these were included in the final analysis.
Discussion
Our data do not show a decrease in the core temperatures of patients who receive pre-hospital anaesthesia, unlike patients who are anaesthetised without pre-warming, in operating theatres. The lack of a change could relate to patient, anaesthetic or environmental factors.
Key findings
- Our data do not demonstrate a significant decrease in the core temperatures of patients following induction of pre-hospital anaesthesia.
- There is no evidence of heat redistribution in patients receiving pre-hospital anaesthesia within a well governed pre-hospital medicine service.
- Even in temperate climates there is a significant rate of preexisting hypothermia in critically ill trauma patients requiring prehospital anaesthesia.
