Evidence map›Paper›PMID 31699120›Full record

ArticleScandinavian journal of trauma, resuscitation and emergency medicine2019

Characteristics of patients treated by the Danish Helicopter Emergency Medical Service from 2014-2018: a nationwide population-based study.

Karen Alstrup, Thea Palsgaard Møller, Lars Knudsen, Troels Martin Hansen, Jens Aage Kølsen Petersen, Leif Rognås, Charlotte Barfod

Open access · goldAbstract read
In one paragraph

Article in Scandinavian journal of trauma, resuscitation and emergency medicine, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
7.0field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Cross-border collaboration in a major incident: emergency medical services response to a train crash.Scandinavian journal of trauma, resuscitation and emergency medicine · 2026
    Article
  3. Article
  4. Article
  5. Article
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  7. Article
  8. Article
  9. Article
  10. Emergency call utilization over a 10-years period: an observational study in Region Zealand, Denmark, 2013-2022.Scandinavian journal of trauma, resuscitation and emergency medicine · 2024
    Observational
  11. Article
  12. Article
  13. Review
  14. Helicopter Ambulance Transport to the Emergency Department: Demographic and Clinical Factors Impacting Outcomes in a Turkish Medical Center.Medical science monitor : international medical journal of experimental and clinical research · 2023
    Article
  15. Observational
  16. Article
  17. Article
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  20. Observational
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 1 country.

Karen AlstrupDepartment of Research and Development, Pre-hospital Emergency Medical Services, Central Denmark Region, Olof Palmes Allé 34, 8200, Aarhus N, Denmark. karals@rm.dk.ORCID http://orcid.org/0000-0002-8151-987X
Thea Palsgaard MøllerCopenhagen Emergency Medical Services, University of Copenhagen, Aarhus, Denmark.
Lars KnudsenDepartment of Anaesthesiology, Aarhus University Hospital, Aarhus, Denmark.
Troels Martin HansenThe Danish Air Ambulance, Aarhus, Denmark.
Jens Aage Kølsen PetersenDepartment of Anaesthesiology, Aarhus University Hospital, Aarhus, Denmark.
Leif RognåsDepartment of Research and Development, Pre-hospital Emergency Medical Services, Central Denmark Region, Olof Palmes Allé 34, 8200, Aarhus N, Denmark.
Charlotte BarfodThe Danish Air Ambulance, Aarhus, Denmark.
Aarhus University Hospital · DKUniversity of Copenhagen · DKCentral Denmark Region · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA national Helicopter Emergency Medical Service (HEMS) was introduced in Denmark in 2014 to ensure the availability of physician-led critical care for all patients regardless of location. Appropriate dispatch of HEMS is known to be complex, and resource utilisation is a highly relevant topic. Population-based studies on patient characteristics are fundamental when evaluating and optimising a system. The aim of this study was to describe the patient population treated by the Danish HEMS in terms of demographics, pre-hospital diagnostics, severity of illness or injury, and the critical care interventions performed.

methodThe study is a retrospective nationwide population-based study based on data gathered from the Danish HEMS database. We included primary missions resulting in a patient encounter registered between October 1

resultsOf 13.391 dispatches registered in the study period we included 7133 (53%) primary missions with patient encounter: 4639 patients were air lifted to hospital, 174 patients were escorted to hospital by the HEMS physician in an ambulance, and in 2320 cases HEMS assisted the ground crew on scene but did not escort the patient to hospital. Patient age ranged from 0-99 years and 64% of the population were men. The median age was 60 years. The main diagnostic groups were cardio-vascular emergencies (41%), trauma (23%) and neurological emergencies (16%). In 61% of the cases, the patient was critically ill/injured corresponding to a NACA (National Advisory Committee for Aeronautics) score between 4 and 7 (both included). In more than one third of the missions a critical care intervention was performed. Ultrasound examination and endo-tracheal intubation were the critical care interventions most frequently performed (21% and 20%, respectively).

conclusionThe national Danish HEMS primarily attends severely ill or injured patients and often perform critical care interventions. In addition, the Danish HEMS provides rapid transport to highly specialised treatment for patients in the more rural parts of the country. Patients with cardio-vascular emergencies, trauma and neurological emergencies are among those patient groups most commonly seen. We conclude that the overall dispatch profile appears appropriate but emphasise that continuous development and refinement is essential.

Indexed as

AdolescentAdultAgedAged, 80 and overAge DistributionAir AmbulancesChildChild, PreschoolCritical CareDenmarkEmergency Medical ServicesFemaleHumansInfantInfant, NewbornIntubation, IntratrachealCritical care interventionsDiagnosticsHelicopter EMSNationalPopulationSeverity score

Identifiers

PMID31699120
PMCPMC6836366
OpenAlexW2989276947

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.