I bring you a weekly bite-sized chunk of the science behind helicopter human factors and CRM in practice, simplifying the complex and distilling a helicopter related study into a summary of less than 500 words.
TITLE:
When tragedy strikes: From the Rush Matrix to the Deliberate Response Framework – A narrative review of self-response decision-making in Helicopter Emergency Medical Services.
WHAT?
What happens when a HEMS organisation loses one of its own aircraft? Should it dispatch another aircraft and crew to the accident scene? This paper examines the operational and psychological risks of self-response, proposing a structured decision-making framework to prevent an initial tragedy from becoming a second accident.
WHERE?
A review drawing on evidence from aviation, emergency medicine, firefighting, law enforcement and decision science, with particular reference to US HEMS operations.
WHEN?
Published in 2026 in the Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine.
WHY?
There is currently no published primary research or specific operational guidance addressing how HEMS/SAR organisations should decide whether to deploy their own crews following an accident involving colleagues. Such decisions combine extreme time pressure, personal attachment and incomplete information; conditions that may undermine otherwise sound operational judgement.
HOW?
The authors first developed two original concepts: the Rush Matrix, describing how time pressure and emotional involvement can compromise decision-making, and the Deliberate Response Framework (DRF), a four-stage decision aid intended to counter these pressures. They then conducted a narrative review of 36 sources from related high-risk industries to examine whether existing evidence supported their proposed frameworks and their applicability to HEMS self-response decisions. Neither framework has yet been empirically validated.
FINDINGS:
Evidence from related industries highlights four interacting hazards: exposure to the same conditions that caused the original accident; emotionally compromised responders; uncoordinated convergence of rescue resources; and the potential for secondary casualties.
The proposed Deliberate Response Framework introduces four sequential decision gates:
- Systemic risk: Could the original hazard also threaten the responding aircraft?
- Alternative response: Is self-response the only viable option within an acceptable timeframe?
- Outcome impact: Could deploying meaningfully improve the outcome?
- Human factors: Are the designated responders genuinely fit to undertake the mission?
Each gate must be cleared before dispatch proceeds.
SO WHAT?
A conventional risk matrix assumes an objective decision-maker, but what happens when the person assessing the risk is personally involved in the emergency?
For HEMS and SAR organisations, the practical message is to prepare for this scenario before it happens. Integrating self-response procedures into the SMS and Emergency Response Plan, establishing mutual-aid arrangements, defining independent decision-making authority and rehearsing the process through tabletop exercises could reduce reliance on emotionally driven judgement.
The framework also legitimises a decision not to respond. Standing down must be recognised as potentially sound professional judgement rather than abandonment of colleagues.
REFERENCE:
Benton, M., & Griffin, R. (2026). When tragedy strikes: From the rush matrix to the deliberate response framework – A narrative review of self-response decision-making in helicopter emergency medical services. Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine. Advance online publication. https://doi.org/10.1186/s13049-026-01702-5
