Ambulance paramedics play a recognized critical role in providing rapid pre-hospital assessment, triage, and expediting patient access to emergency treatments for time-critical conditions, such as trauma, acute stroke, and myocardial infarction (MI). While existing structured communication frameworks have successfully improved the accuracy and speed of information exchange between pre-hospital and hospital staff, the actual impact of these improvements on patient health outcomes in time-critical scenarios remains unclear.
The systematic review, conducted by Flynn and colleagues, addresses whether patient outcomes could be improved if paramedics or Emergency Medical Technicians (EMTs) remained for a limited time after handover to actively assist with shared patient care alongside the hospital team. This potential expansion of the paramedic role across the secondary/tertiary care threshold could utilize their relevant clinical skills during periods when hospital teams face intense demands, potentially accelerating access to necessary emergency treatments. The overall objective was to summarize the current evidence describing the clinical effectiveness of structured handovers and any enhanced/expanded paramedic role across the threshold of secondary care for trauma, stroke, and MI patients.
Rigorous Methodology and Search Strategy
The researchers adhered to a published protocol and the PRISMA reporting guidelines. They conducted a comprehensive electronic search spanning January 1990 to September 2016, applying a structured strategy across eight major bibliographic databases (including MEDLINE, EMBASE, and Cochrane).
A key requirement for studies to be included in the primary analysis was that they must report on the development, evaluation, or implementation of:
- Novel structured handovers (generic or specific) for acute stroke, acute MI, or trauma patients; OR
- New processes or post-handover clinical activity where paramedics actively contributed towards patient care alongside the hospital team for a limited time in the secondary care setting.
Crucially, eligible studies were required to assess changes in health outcomes (e.g., survival, quality of life, or functional status at 24 hours or discharge). Studies were specifically excluded if they focused only on pre-hospital activity, non-clinical activity (such as evaluation of electronic record systems), or transportation involving an accompanying physician.
The Central Evidence Gap: The Shift to Narrative Review
The most significant finding of the systematic review was a major deficit in clinical research: The authors did not identify any studies that met the full inclusion criteria, specifically the requirement to evaluate the health impact (clinical effectiveness) of an emergency ambulance paramedic intervention following arrival at the hospital for trauma, stroke, or MI patients.
Due to this lack of direct evidence, the review shifted to a narrative synthesis of 36 shortlisted studies that reported process/operational data relevant to these time-critical scenarios. These studies suggested that structured handovers and enhanced paramedic actions after hospital arrival might be beneficial, thus warranting further investigation.
Detailed Synthesis of Non-Clinical Outcomes
The narrative review categorized the shortlisted studies into three areas, focusing primarily on process improvements:
1. Structured Handover Tools and Protocols
Literature suggested that structured handover tools and feedback on performance can positively impact paramedic communication behavior.
- IMIST-AMBO: An Australian study using video assessment demonstrated the feasibility of improving handover communication using the IMIST-AMBO protocol (Identification, Mechanism, Injuries, Signs, Treatment, Allergies, Medications, Background, Other). This structure resulted in a greater volume of consistently ordered information, fewer clarification questions from hospital staff, shorter handover duration, and increased eye contact.
- Trauma Handover: Qualitative studies identified professional and interpersonal factors for improved trauma handovers, including direct communication with the responsible ED clinician and inter-disciplinary feedback. However, an educational intervention aimed at improving paramedic verbal communication skills in trauma handovers failed to show a statistically significant impact on the amount of clinical information recalled by physicians.
- Medication Reconciliation: One uncontrolled study focused on paramedics bringing patients’ own medications to the ED, resulting in a statistically significant increase in medication reconciliation (from 67% to 87% of patients) and a reduction in prescribing errors (from 18.9% to 8.8%).
2. Enhanced Skills Leading to Direct Transportation
The most common and effective “additional role” found for paramedics after arrival was limited to ‘direct transportation’ of patients, often bypassing the Emergency Department (ED), to specialist care facilities like CT scanners or catheterization laboratories.
- Myocardial Infarction (MI): Pre-hospital diagnosis of ST-segment elevation MI (STEMI) by paramedics, followed by direct transfer to the catheterization laboratory, successfully led to improved process measures. Several studies reported reduced door-to-treatment (door-to-balloon) times. For instance, direct ambulance admission achieved the 90-minute target for door-to-balloon time in 94% of cases, compared to just 29% of patients referred from the ED.
- Stroke: For suspected stroke patients, protocols involving direct transportation to the CT scanner (often bypassing the ED) reduced process times, including door-to-imaging and door-to-needle times (for thrombolysis). One example of the ‘Helsinki model’ reduced the median door-to-treatment time with t-PA from 49.5 minutes to 29 minutes over five months.
- Limitation of Role: In all these ‘direct transfer’ scenarios, the paramedic’s role was consistently restricted to transportation and pre-hospital activation/diagnosis, without further involvement in patient assessment or treatment once inside the specialist care facility.
3. Enhanced Paramedic Competencies
Paramedics have demonstrated the successful development and safe implementation of enhanced clinical skills (diagnosis, clinical decision-making, treatment administration previously reserved for physicians) in pre-hospital or primary care settings, with improved process outcomes and no additional risk. Examples include paramedic-administered thrombolysis. While these skills are highly transferable, the sources noted that paramedics only used the broadest range of skills when they were already employed within a hospital or community healthcare unit (e.g., as Emergency Care Practitioners).
Conclusions and Future Outlook
In summation, there is currently insufficient published evidence to make a strong recommendation regarding condition-specific handovers or formally extending the ambulance-based paramedic role across the hospital threshold specifically to improve health outcomes for trauma, stroke, and MI patients.
However, the literature clearly shows that paramedic competencies and roles are rapidly evolving. The demonstrated improvements in process measures (reducing crucial time delays) strongly suggest that enhanced communication and shared clinical skills have the potential to benefit health outcomes.
The authors conclude that a ‘new wave’ of paramedic research is required. This research must focus on designing cost-effective handover and feedback processes and, critically, measure the direct health impact resulting from enhanced inter-professional sharing of clinical skills, moving beyond traditional professional and organizational boundaries. An example of this next step is the ongoing UK PASTA trial (Paramedic Acute Stroke Treatment Assessment), which is evaluating the clinical and cost-effectiveness of an enhanced paramedic role both before and after stroke admission.