Prehospital interventions before and after implementation of a physician-staffed helicopter.

INTRODUCTION: Implementation of a physician-staffed helicopter emergency medical service (HEMS) in eastern Denmark was associated with increased survival for severely injured patients. This study aimed to assess the potential impact of advanced prehospital interventions by comparing the proportion of patients who received those interventions before and after the HEMS implementation. METHODS: A post-hoc analysis of a prospective before-after study. We included trauma patients with Injury Severity Scores above three who had been admitted to seven emergency departments or one level 1 trauma centre in the course of a five-month period before and a 12-month period after the HEMS implementation. We compared the proportion of patients receiving at least one of 14 predefined advanced interventions between the two periods. RESULTS: We included 189 patients before and 548 patients after the implementation. The proportion of patients who had interventions done increased from 24.3% to 36.1% (difference (95% confidence limits (CL)): 11.9% (4.6-19.3%); p = 0.003). In patients with a Glasgow Coma Scale score below nine and/or an Abbreviated Injury Score above three in the head region, endotracheal intubation was done prior to hospital arrival in 28.1% (9/32) before versus 48.6% (35/72) after (difference (CL): 20.5% (1.1-39.9%)). The proportion of patients who received opioids increased from 11.1% to 21.8% (p < 0.01). CONCLUSIONS: A higher proportion of trauma patients received advanced prehospital interventions after the implementation of a physician-staffed HEMS. FUNDING: Funding for this study was received from TrygFonden. TRIAL REGISTRATION: not relevant.

The impact of a physician-staffed helicopter on outcome in patients admitted to a stroke unit: a prospective observational study.

BACKGROUND: Transportation by helicopter may reduce time to hospital admission and improve outcome. We aimed to investigate the effect of transport mode on mortality, disability, and labour market affiliation in patients admitted to the stroke unit. METHODS: Prospective, observational study with 5.5 years of follow-up. We included patients admitted to the stroke unit the first three years after implementation of a helicopter emergency medical services (HEMS) from a geographical area covered by both the HEMS and the ground emergency medical services (GEMS). HEMS patients were compared with GEMS patients. Primary outcome was long-term mortality after admission to the stroke unit. RESULTS: Of the 1679 patients admitted to the stroke unit, 1068 were eligible for inclusion. Mortality rates were 9.04 per 100 person-years at risk (PYR) in GEMS patients and 9.71 per 100 PYR in HEMS patients (IRR = 1.09, 95% CI 0.79-1.49; p = 0.60). The 30-day mortality was 7.4% with GEMS and 7.9% with HEMS (OR = 1.02, CI 0.53-1.96; p = 0.96). Incidence rate of involuntary early retirement was 6.97 per 100 PYR and 7.58 per 100 PYR in GEMS and HEMS patients, respectively (IRR = 1.19, CI 0.27-5.26; p = 0.81). Work ability after 2 years and time on social transfer payments did not differ between groups. We found no significant difference in mean modified Rankin Scale score after 3 months (2.21 GEMS vs. 2.09 HEMS; adjusted mean difference = -0.20, CI -0.74-0.33; p = 0.46). DISCUSSION: The possible benefit of HEMS for neurological outcome is probably difficult to detect by considering mortality, but for the secondary analyses we had less statistical power as illustrated by the wide confidence intervals. CONCLUSION: Helicopter transport of stroke patients was not associated with reduced mortality or disability, nor improved labour market affiliation compared to patients transported by a ground unit. TRIAL REGISTRATION: The study was registered at ClinicalTrials.gov ( NCT02576379 ).