Helicopter Emergency Medical Services Patients Research Articles

Trauma patient transport to hospital using helicopter emergency medical services or road ambulance in Sweden: a comparison of survival and prehospital time intervals

BackgroundThe benefits of helicopter emergency medical services (HEMS) transport of adults following major trauma have been examined with mixed results, with some studies reporting a survival benefit compared to regular emergency medical services (EMS). The benefit of HEMS in the context of the Swedish trauma system remains unclear.AimTo investigate differences in survival and prehospital time intervals for trauma patients in Sweden transported by HEMS compared to road ambulance EMS.MethodsA total of 74,032 trauma patients treated during 2012–2022 were identified through the Swedish Trauma Registry (SweTrau). The primary outcome was 30-day mortality and Glasgow Outcome Score at discharge from hospital (to home or rehab); secondary outcomes were the proportion of severely injured patients who triggered a trauma team activation (TTA) on arrival to hospital and the proportion of severely injured patients with GCS ≤ 8 who were subject to prehospital endotracheal intubation.Results4529 out of 74,032 patients were transported by HEMS during the study period. HEMS patients had significantly lower mortality compared to patients transported by EMS at 1.9% vs 4.3% (ISS 9–15), 5.4% vs 9.4% (ISS 16–24) and 31% vs 42% (ISS ≥ 25) (p < 0.001). Transport by HEMS was also associated with worse neurological outcome at discharge from hospital, as well as a higher rate of in-hospital TTA for severely injured patients and higher rate of prehospital intubation for severely injured patients with GCS ≤ 8. Prehospital time intervals were significantly longer for HEMS patients compared to EMS across all injury severity groups.ConclusionTrauma patients transported to hospital by HEMS had significantly lower mortality compared to those transported by EMS, despite longer prehospital time intervals and greater injury severity. However, this survival benefit may have been at the expense of a higher degree of adverse neurological outcome. Increasing the availability of HEMS to include all regions should be considered as it may be the preferrable option for transport of severely injured trauma patients in Sweden.

Can video communication in the emergency medical communication centre improve dispatch precision? A before–after study in Norwegian helicopter emergency medical services

ObjectivesDispatching helicopter emergency medical services (HEMS) to the patients with the greatest medical or logistical benefit remains challenging. The introduction of video calls (VC) in the emergency medical communication centres...

Long Distance Air Ambulance Transfers for Endovascular Thrombectomy

Background Endovascular thrombectomy (EVT) is limited to comprehensive stroke centers (CSCs), with patients who first present to primary stroke centers (PSCs) transferred for treatment by road ambulance or helicopter emergency medical services (HEMS). We aimed to determine if there were outcome differences in patients transferred for EVT via HEMS. Methods A retrospective observational study was performed in the setting of a large regional network with 1 CSC receiving patients directly, or via road ambulance from 3 metropolitan PSCs or HEMS from 13 more distant PSCs. Consecutive patients were identified from a mandatory national EVT registry. HEMS transfers were compared with 2 metropolitan patient groups: direct‐to‐CSC and metro PSC‐to‐CSC patients. The primary outcome was day 90 functional independence (modified Rankin scale score, 0–2). Secondary outcomes included day 90 death rate. Results A total of 1183 EVT‐treated patients were identified (45% women; median age, 69 years; 88% anterior circulation strokes; median baseline National Institutes of Health Stroke Scale score, 16). A total of 332 (28%) patients were HEMS transfers, 428 (36%) were direct‐to‐CSC, and 423 (36%) were metro PSC‐to‐CSC transfers. The median transfer distances to the CSC were 11 (8–11) miles for road ambulance and 81 (70–121) miles for HEMS. HEMS patients were matched at baseline with the 2 metropolitan groups, except for a lower prevalence of congestive heart failure ( P &lt;0.001) and a higher thrombolysis rate (54% versus 42% and 45%; P =0.004). HEMS patients had longer onset‐to‐EVT‐groin time (median minutes 370 versus 195 direct‐to‐CSC patients and 255 metro PSC‐to‐CSC; P &lt;0.001). Direct‐to‐CSC patients were more likely to be independent at day 90 ( P =0.026), but there was no difference between the 2 transfer groups ( P =0.911). There were no differences among the 3 cohorts in day 90 mortality rate for all stroke types ( P =0.321) or independence in anterior circulation strokes ( P =0.124). Conclusion In this large regional stroke network, patients transferred via HEMS for EVT had similar day 90 outcomes to their metropolitan counterparts despite longer transfer times. CSCs should not be discouraged from considering patients from more distant PSCs who require HEMS.

Impact of Point-of-Care Ultrasound on Prehospital Decision Making by HEMS Physicians in Critically Ill and Injured Patients: A Prospective Cohort Study.

Several studies have shown the additional benefit of point-of-care ultrasound (POCUS) by prehospital Emergency Medical Services (EMS). Since organization of EMS may vary significantly across countries, the value of POCUS likely depends on the prehospital system in which it is used. In order to be able to optimally implement POCUS and develop a tailored training curriculum, it is important to know how often POCUS is currently used, for which indications it is used, and how it affects decision making. The aims of this study were: (1) to determine the percentage of patients in whom POCUS was used by Dutch Helicopter Emergency Medical Services (HEMS) crews; (2) to determine how often POCUS findings led to changes in on-scene management; and (3) what these changes were. Patients who received prehospital care from December 1, 2020 through March 31, 2021 by a single HEMS crew were included in this prospective cohort study. Clinical data and specific data on POCUS examination, findings, and therapeutic consequences were collected and analyzed. During the study period, on-scene HEMS care was provided to 612 patients, of which 211 (34.5%) patients underwent POCUS. Of these, 209 (34.2%) patients with a median age of 45 years were included. There were 131 (62.7%) trauma patients, and 70 (33.7%) of the included patients underwent cardiopulmonary resuscitation (CPR). The median reported time of POCUS examination was three (P25-P75 2-5) minutes. Median prolongation of on-scene time was zero (P25-P75 0-1) minutes. In 85 (40.7%) patients, POCUS examination had therapeutic consequence: POCUS was found to impact treatment decisions in 34 (26.0%) trauma patients and 51 (65.4%) non-trauma patients. In patients with cardiac arrest, POCUS was most often used to aid decision making with regard to terminating or continuing resuscitation (28 patients; 13.4%). During the study period, POCUS examination was used in 34.5% of all prehospital HEMS patients and had a therapeutic consequence in 40.7% of patients. In trauma patients, POCUS seems to be most effective for patient triage and evaluation of treatment effectiveness. Moreover, POCUS can be of significant value in patients undergoing CPR. A tailored HEMS POCUS training curriculum should include ultrasound techniques for trauma and cardiac arrest.

Nine golden codes: improving the accuracy of Helicopter Emergency Medical Services (HEMS) dispatch—a retrospective, multi-organisational study in the East of England

BackgroundHelicopter Emergency Medical Services (HEMS) are a limited and expensive resource, and should be intelligently tasked. HEMS dispatch was identified as a key research priority in 2011, with a call to identify a ‘general set of criteria with the highest discriminating potential’. However, there have been no published data analyses in the past decade that specifically address this priority, and this priority has been reaffirmed in 2023. The objective of this study was to define the dispatch criteria available at the time of the initial emergency call with the greatest HEMS utility using a large, regional, multi-organizational dataset in the UK.MethodsThis retrospective observational study utilized dispatch data from a regional emergency medical service (EMS) and three HEMS organisations in the East of England, 2016–2019. In a logistic regression model, Advanced Medical Priority Dispatch System (AMPDS) codes with ≥ 50 HEMS dispatches in the study period were compared with the remainder to identify codes with high-levels of HEMS patient contact and HEMS-level intervention/drug/diagnostic (HLIDD). The primary outcome was to identify AMPDS codes with a > 10% HEMS dispatch rate of all EMS taskings that would result in 10–20 high-utility HEMS dispatches per 24-h period in the East of England. Data were analysed in R, and are reported as number (percentage); significance was p < 0.05.ResultsThere were n = 25,491 HEMS dispatches (6400 per year), of which n = 23,030 (90.3%) had an associated AMPDS code. n = 13,778 (59.8%) of HEMS dispatches resulted in patient contact, and n = 8437 (36.6%) had an HLIDD. 43 AMPDS codes had significantly greater rates of patient contact and/or HLIDD compared to the reference group. In an exploratory analysis, a cut-off of ≥ 70% patient contact rate and/or ≥ 70% HLIDD (with a > 10% HEMS dispatch of all EMS taskings) resulted in 17 taskings per 24-h period. This definition derived nine AMPDS codes with high HEMS utility.ConclusionWe have identified nine ‘golden’ AMPDS codes, available at the time of initial emergency call, that are associated with high-levels of whole-system and HEMS utility in the East of England. We propose that UK EMS should consider immediate HEMS dispatch to these codes.

Characteristics of Patients Treated by Helicopter Emergency Medical Services in Ireland from 2012 to 2022: A Retrospective Analysis of Ten Years of Data

Introduction:A dedicated primary scene landing Helicopter Emergency Medical Services (HEMS) has been in operation in Ireland since 2012. Commencing with a unique collaboration between the Irish Aer Corps and civilian Emergency Medical Services (EMS) it has expanded to include a second charity funded model in the south west of the country. Both services operate under a single governance and dispatch system and provide an Advanced Paramedic level of care to the patients they serve. There is limited published literature on prehospital care in Ireland and to date no detailed descriptive study of patients treated by HEMS in Ireland. This research describes the characteristics of the patients treated by HEMS in Ireland.Method:This retrospective study will investigate the data of an excess of 8000 patients responded to by HEMS (2012-2022) in the republic of Ireland. Descriptive statistics will be used to interpret patient demographics, geographical spread, receiving facilities, mechanism/etiology of disease or injury, vital trends, transportation decisions and clinical interventions and short-term clinical outcomes.Results:Early stage data extraction shows seasonal variation in HEMS use with increased use in the summer months. Almost twice as many male patients vs. females were treated by HEMS while the most common age profile was 55-65 yrs. Trauma presentations have increased over the past 10 years and now account for over 60% of the overall caseload. The most common medical etiology was cardiac arrest or post resuscitation care followed by STEMI Care, the most common trauma cases were from road traffic collisions followed by falls and farm accidents.Conclusion:This study will be the first to describe the overall characteristics of HEMS patients in Ireland over a decade of service provision. As the Irish health system continues to evolve, so must its aeromedical services.

Hemodynamics in Helicopter Emergency Medical Services (HEMS) Patients Undergoing Rapid Sequence Intubation With Etomidate or Ketamine.

Rapid sequence intubation (RSI) is performed by helicopter emergency medical services (HEMS) providers to establish airway control. Common induction agents are etomidate and ketamine, both touted to have relatively stable hemodynamic profiles. Limited data comparing these medications in the air medical setting exist. Compare administration of ketamine and etomidate on peri-intubation hemodynamics. A retrospective chart review of intubations performed by a HEMS program over 69 months was completed. Heart rate (HR) change, systolic blood pressure (SBP) change, and hypotension with etomidate or ketamine use were measured. There were 258 patients induced with etomidate and 48 with ketamine. Etomidate patients showed a +1.161% change in HR (SD ± 22.7) and -0.49% change in SBP (SD ± 25.0). Ketamine patients showed a -4.7% change in HR (SD ± 16.7) and 17.2% change in SBP (SD ± 43.4). The p-values for percentage change in HR and SBP between etomidate and ketamine were 0.0830 and 0.0018, respectively. Twenty-five episodes of postadministration hypotension occurred with etomidate, and two with ketamine (p=0.028). Both ketamine and etomidate are appropriate for intubation of HEMS patients. Ketamine was preferentially selected for hypotensive patients with statistically significant improvement in SBP. Although statistically significant, both ketamine and etomidate had relative low incidences of hypotension.

Secondary Transfers to University Hospitals in Patients Primarily Triaged to District General Hospitals by the Danish Helicopter Emergency Medical Service: A National Population-Based Study

ObjectiveThe aim of this study was to analyze data from the Danish helicopter emergency medical service (HEMS) database, focusing on patients undergoing a secondary transfer from district general hospitals (DGHs) to university hospitals within 24 hours of the initial emergency call. MethodsThis is a national population-based study analyzing HEMS patients undergoing a secondary transfer between October 1, 2014, and April 30, 2018. ResultsFifty-three (2.9%) of the 1,846 patients initially triaged to a DGH by the HEMS team required a secondary transfer. These 53 patients constituted 0.7% of all 7,133 patients seen by the HEMS teams during the study period. More than 60% of these patients were initially treated for either a cardiovascular or a neurologic emergency. HEMS-escorted patients had a mortality rate at day 30 of 14.3% (95% confidence interval, 4.8-38.0), and the HEMS-assisted group had a mortality rate at day 30 of 3.1% (95% CI, 0.5-20.2). ConclusionPatients initially triaged to a DGH by the HEMS teams seldomly required a secondary transfer, indicating a low degree of prehospital undertriage for direct transfer to a university hospital. Cardiovascular or neurologic emergencies were the major reasons for transportation. Mortality seems comparable with that in the general population of patients treated by the Danish HEMS teams.

Prehospital coagulation measurement by a portable blood analyzer in a helicopter emergency medical service (HEMS).

In helicopter emergency medical services, HEMS, coagulopathy presents both in trauma (e.g. consumption of coagulation factors) and non-trauma cases (e.g. anticoagulant use). Therefore, in HEMS coagulation measurements appear promising and Prothrombin Time (PT) and derived INR are attractive variables herein. We tested the feasibility of prehospital PT/INR coagulation measurements in HEMS. This study was performed at the Dutch HEMS, using a portable blood analyzer (i-Stat®1, Abbott). PT/INR measurements were performed on (hemodiluted) author's blood, and both trauma- and non-trauma HEMS patients. Device-related benefits of the i-Stat PT/INR system were portability, speed and ease of handling. Limitations included a rather narrow operational temperature range (16-30 °C). PT/INR measurements (n = 15) were performed on hemodiluted blood, and both trauma and non-trauma patients. The PT/INR results confirmed effects of hemodilution and anticoagulation, however, most measurement results were in the normal INR-range (0.9-1.2). We conclude that prehospital PT/INR measurements, although with limitations, are feasible in HEMS operations.

Determining a Need for Point-of-Care Ultrasound in Helicopter Emergency Medical Services Transport

ObjectivePoint-of care-ultrasound (PoCUS) is useful in evaluating unstable emergency department patients. The portability of this technology increases its potential use in prehospital settings, including helicopter emergency medical services (HEMS) programs. Identifying useful applications may support implementing a PoCUS program that develops sonography skills for prehospital providers. The aim of this study was to determine the HEMS patient population that would benefit from prehospital PoCUS for hypotension and how commonly the extended focused assessment with sonography in trauma (E-FAST) for trauma patients or the rapid ultrasound in shock (RUSH) for medical patients could be used by HEMS. MethodsA retrospective chart review was performed over a 1-year period of adult patients transported by a midwestern HEMS system. Charts were reviewed for episodes of hypotension. ResultsThe chart review included 216 charts, of which 3 were excluded. Of the 213 cases, 100 were trauma patients, and 113 were medical patients. Of the trauma patients, 51% experienced hypotension, as did 73 of 113 medical patients. ConclusionFifty percent of HEMS patients may benefit from PoCUS to evaluate for hypotension in flight.

Is E-Learning Education Effective in Increasing the Ability of Nonphysician Medical Flight Crewmembers to Accurately Interpret Point-of-Care Lung and Cardiac Ultrasound Examinations?

ObjectivePatients suffering from severe injury or illness can benefit from the care and transport of helicopter emergency medical services (HEMS). This may be due to the speed of transport, level of care, expertise of flight crews, and access to specialized equipment and tools. One such tool is point-of-care ultrasound (POCUS). POCUS-based lung and cardiac evaluations can positively influence the assessment and care provided to critically ill HEMS patients, but how these procedures can best be learned by nonphysician flight crewmembers has not been fully explored. MethodsIn this prospective, interventional study, 26 flight crewmembers were evaluated before and after a succinct, guided educational intervention focused on the use of free open-access medical education material intended to help them acquire the knowledge needed to accurately identify and interpret POCUS assessments. ResultsAfter completing the educational intervention, participants had a statistically significant improvement in their postintervention scores. ConclusionThis study supports the use of free open-access medical education material in improving the knowledge needed for nonphysician flight crewmembers to interpret basic lung and cardiac ultrasound images. Integrating this information into educational programs may contribute to increased comfort and proficiency and serve to accelerate the adoption of this tool in the air medical environment.

Association of Helicopter vs Ground Emergency Medical Transportation With 1-Year Mortality in Denmark

Appropriate use of helicopter emergency medical service (HEMS) is important in ensuring that patients with critical illness or injury receive adequate treatment. To investigate the association between use of HEMS compared with use of ground EMS (GEMS) and mortality overall and in a subgroup of patients with critical illness or injury. This register-based, nationwide cohort study used data retrieved from Danish registries from October 1, 2014, to April 30, 2018. Patients receiving GEMS originated from dispatched HEMS missions for which a helicopter was unavailable. For the primary analysis, patients from accepted HEMS missions and patients from missions in which HEMS was dispatched but unavailable were included. The secondary analysis included patients assigned a hospital International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD-10) diagnosis considered a critical illness or injury. These patients were selected via a consensus-based agreement among all authors by reviewing the Danish version of the World Health Organization's ICD-10 classification. Data were analyzed from March to June 2020. Dispatch of HEMS vs GEMS unit (primary analysis) and treatment and transport by HEMS vs GEMS unit among patients with critical illness or injury (secondary analysis). One-year mortality was retrieved from the Danish Civil Registration System. Among 10 618 patients (median [interquartile range] age, 60 [42-72] years; 6834 [64.4%] men) included in the primary analysis, 9480 patients (89.3%) received HEMS and 1138 patients (10.7%) received GEMS. Median (interquartile range) age was 60 (42-72) years, and 6834 patients (64.4%) were men. Adjusted cumulative 1-year mortality was 23.2% (95% CI, 22.4%-24.1%) among patients receiving HEMS vs 24.5% (95% CI, 21.9%-27.1%) among patients receiving GEMS. The difference in mortality risk for HEMS compared with GEMS was not statistically significant (hazard ratio, 0.94 [95% CI, 0.84-1.06]). Among 2260 patients with critical illness or injury receiving HEMS, compared with 315 patients with critical illness or injury receiving GEMS, adjusted cumulative 1-year mortality was 25.1% (95% CI, 23.5%-26.7%) vs 27.1% (95% CI, 22.0%-32.1%). The difference in mortality risk for HEMs compared with GEMs was not statistically significant (hazard ratio, 0.91 [95% CI, 0.73-1.14]). This study found that 1 year after dispatch, the use of HEMS, compared with the use of GEMS, was not associated with a statistically significant difference in mortality overall or mortality among patients with critical illness or injury. Further research is needed to determine whether optimized dispatch systems may be associated with further improvements in survival among selected patients.

Characteristics of Emergency Neurological Patients Who Were Transported by Helicopter Emergency Medical Services in Tochigi, Japan.

In Japan, reports on the association of individual characteristics, and geographical distance and time with clinical outcomes for neurological emergencies involving helicopter emergency medical services (HEMS) are scarce. Using Tochigi HEMS data (2010-2018), we assessed the characteristics of 1,170 emergency neurological patients (e.g., stroke, neurotrauma, and seizure) at the base hospital, which covered 58% of all HEMS patients in the prefecture. After initial treatment in the emergency room, emergency physicians confirmed the clinical outcomes of each patient compared to those at the incident sites (recovery/non-recovery). We calculated the geographic distance from the base hospital to each incident site, and estimated and adjusted odds ratios (aOR) and 95% confidence intervals (CI) for non-recovery against distance. The mean distance between the incident site and base hospital was 22.0 ± 11.7 km, and 77.4% of patients recovered following initial treatment. Two peak age groups were observed among emergency neurological diseases, including seizures in patients who were aged < 5 years and stroke and neurotrauma in patients who were aged 70-80 years. The percentages of stroke, traumatic head and brain injury, and seizure were 35.8%, 29.2%, and 22.8%, respectively. The incidence of stroke (aOR = 11.8, 95% CI 6.86-20.3) and neurotrauma (aOR = 4.86, 95% CI 2.78-8.51) independently predicted a poor prognosis. However, no significant association was observed with the distance from the base hospital. Therefore, in the Tochigi prefecture, geographical disparities may not affect the short-term prognosis of patients with neurological emergencies who were transported by HEMS.

First pass success of tracheal intubation using the C-MAC PM videolaryngoscope as first-line device in prehospital cardiac arrest compared with other emergencies: An observational study.

Successful airway management is a priority in the resuscitation of critically ill or traumatised patients. Several studies have demonstrated the importance of achieving maximum first pass success, particularly in prehospital advanced airway management. To compare success rates of emergency intubations between patients requiring cardiopulmonary resuscitation (CPR) for cardiac arrest (CPR group) and other emergencies (non-CPR group) using the C-MAC PM videolaryngoscope. Ongoing analysis of prospective collected prehospital advanced airway management core variables. Single helicopter emergency medical service (HEMS) 'Christoph 22', Ulm Military Hospital, Germany, May 2009 to July 2018. We included all 1006 HEMS patients on whom prehospital advanced airway management was performed by board-certified anaesthesiologists on call at HEMS 'Christoph 22'. The C-MAC PM was used as the first-line device. The initial direct laryngoscopy was carried out using the C-MAC PM without the monitor in sight. After scoring the direct laryngoscopic view according to the Cormack and Lehane grade, the monitor was folded within the sight of the physician and tracheal intubation was performed using the videolaryngoscopic view without removing the blade. The primary outcome was successful airway management. Secondary outcomes were the patient's position during airway management, necessity for suction, direct and videolaryngoscopic view according to Cormack and Lehane grading, as well as number of attempts needed for successful intubation. A patent airway was achieved in all patients including rescue techniques. There was a lower first pass success rate in the CPR group compared with the non-CPR group (84.4 vs. 91.4%, P = 0.01). In the CPR group, direct laryngoscopy resulted more often in a clinically unfavourable (Cormack and Lehane grade 3 or 4) glottic view (CPR vs. non-CPR-group 37.2 vs. 26.7%, P = 0.0071). Using videolaryngoscopy reduced the clinically unfavourable grading to Cormack and Lehane 1 or 2 (P < 0.0001). The odds of achieving first pass success were approximately 12-fold higher with a favourable glottic view than with an unfavourable glottic view (OR 12.6, CI, 6.70 to 23.65). Airway management in an anaesthesiologist-staffed HEMS is associated with a high first pass success rate but even with skilled providers using the C-MAC PM videolaryngoscope routinely, patients who require CPR offer more difficulties for successful prehospital advanced airway management at the first attempt. German Clinical trials register (drks.de) DRKS00020484.

Helicopter Emergency Medical Services in Trauma Does Not Influence Mortality in South Africa

ObjectiveSub-Saharan Africa carries a large trauma burden. Helicopter emergency medical services (HEMS) have been suggested to reduce prehospital time and mortality. It is not clear whether HEMS infers a mortality benefit over ground transport in South Africa. This study aimed to determine whether HEMS improved 30-day mortality over ground emergency medical services (GEMS). MethodsA retrospective, case-control study was undertaken for major trauma patients transported to a private trauma center in Johannesburg. A 1-year cohort of HEMS patients was extracted and matched to GEMS patients based on mechanism, injury severity or percentage of the total body surface area burned, age, sex, and comorbidities. The odds ratio (OR) for 30-day mortality was calculated to determine the risk of death. ResultsA total of 822 cases (HEMS: 272 [33%], GEMS: 550 [67%]) were reviewed. We included 410 patients in the matched cohort with equal distribution between transportation modes. The OR for mortality in the total cohort was 2.69 (95% confidence interval, 1.6-4.6; P = .003) for HEMS patients, whereas in the matched cohort the OR was 1.35 (95% confidence interval, 0.5-3.4; P = .503) for patients transported by HEMS. ConclusionIn a matched cohort of major trauma patients, HEMS does not seem to improve mortality over GEMS. These results might reflect the South African HEMS dispatch model.

Helicopter and ground emergency medical services transportation to hospital after major trauma in England: a comparative cohort study

BackgroundThe utilization of helicopter emergency medical services (HEMS) in modern trauma systems has been a source of debate for many years. This study set to establish the true impact of...

Does Direct Helicopter Retrieval Improve Survival of Severely Injured Trauma Patients From Rural Western Australia?

ObjectiveIn remote Western Australia, mortality from major trauma is more than 4 times higher than mortality rates from major trauma in the capital city of Perth. The objective of this study was to determine whether direct helicopter emergency medical service (HEMS) retrieval from an incident scene within the zone 50 to 250 km of Perth to a tertiary hospital improves survival in severely injured trauma patients. Direct HEMS retrieval was compared with indirect retrieval whereby patients were transferred by ambulance to a nearby rural hospital before retrieval to a tertiary hospital in Perth. MethodsA retrospective analysis (2006-2015) was undertaken of all Western Australia trauma registries, and coronial data were collected for all major trauma patients who died before retrieval to a tertiary hospital in Perth. ResultsA total of 1,374 major trauma patients (indirect retrieval = 1,031 and direct HEMS = 343) met the study inclusion criteria. There was a 51% increased risk of death in the indirect patients compared with the direct HEMS patients (15.3% vs. 10.2%, P ≤ .001). ConclusionDirect HEMS retrieval from the incident scene to a tertiary hospital substantially improves the chances of survival for severely injured trauma patients in rural locations in the zone 50 to 250 km of Perth.

Assessment of helicopter versus ground emergency medical services in reducing mortality rate and the length of stay in adult trauma patients between 2002 and 2014 recorded in King Abdulaziz Medical City trauma registry

Background: Trauma is the third leading cause of death worldwide and the most common cause of death among people aged 1-44 years. In Saudi Arabia, traumatic injuries cause one death and four injuries every hour, but survival rates have improved owing to improvements in pre-hospital care processes. Methodology: This retrospective study conducted in King Abdulaziz Medical City (KAMC), Emergency Medicine Department, included data taken from KAMC trauma registry, QuadraMed�, and patients' files. Injury Severity Score (ISS) was used to assess the severity of trauma. We included individuals of both sexes with ISS of ≥9 and aged ≥15 years with different types and mechanisms of injury. Results: Overall, 335 patients (123 transported by helicopter and 212 transported by ground ambulance) were included. The mean ISS for helicopter emergency medical services (HEMS) and ground emergency medical services (GEMS) patients was 20.80 and 19.74, respectively. All HEMS patients had blunt trauma. For GEMS patients, 94.8% had blunt trauma and 5.2% penetrating trauma. Around 81.1% of GEMS patients went home and 18.9% died in hospital. For HEMS patients, 79.7% went home, 14.6% died, and 5.7% were transferred to other hospitals. The mean of length stay among HEMS patients was 46.18 days, whereas it was 44.59 days among GEMS patients. Conclusion: This study suggests that HEMS is associated with a higher survival rate for severe trauma patients than GEMS. However, HEMS patients had a longer length of stay in hospital than GEMS patients.

Treatment Experiences of Traumatic Brain Injury Patients using Doctor-Helicopter Emergency Medical Service: Early Data in a Regional Trauma Center.

ObjectiveThe purpose of this study is to analyze the results of doctor helicopter emergency medical service (HEMS) in traumatic brain injury (TBI) patients and to understand the effect and improvement of doctor HEMS.MethodsWe included TBI patients transferred by doctor HEMS of our hospital between February 2016 and December 2017. Basic characteristics, HEMS data, treatment and results data were analyzed retrospectively. We divided the patients into 3 groups as regarding severity of patient, relevance of treatment and transfer. We investigated the preventable trauma death rate (PTDR) of these groups to increase the reliability of the treatment outcome.ResultsTBI patients using doctor HEMS were indicated in 98 patients (18.7%) among 522 overall HEMS patients. The overall mortality was consisted in 21.4% and 43.2% was resulted in Glasgow outcome scale 4 or 5. The group of proper transport and treatment for severe TBI was consisted in 62.2% including 13 mortality cases and no preventable death. The group of delayed transport or treatment for severe TBI was 18.3% including 8 mortality cases and 1 preventable death. The PTDR of TBI after doctor HEMS was significantly lower than that of overall TBI (4.8% vs. 11.6%, p=0.045).ConclusionIn patients with severe TBI, doctor HEMS can improve treatment outcomes by reducing treatment delay and unnecessary examinations and this result was evidenced that the PTDR were decreased significantly after doctor HEMS transport. The appropriate treatment is mandatory for real-time communication with the emergency doctor and treatment preparation of the trauma team during the HEMS transport.

A Spatial Analysis of Incident Location and Prehospital Mortality for Two United Kingdom Helicopter Emergency Medical Services (HEMS)

Most trauma and out of hospital cardiac arrest (OHCA) deaths occur prior to arrival at hospital, with increased risk for rural compared to urban patients. Essex and Hertfordshire Air Ambulance Trust (EHAAT) and Kent Surrey Sussex Air Ambulance Trust (KSS) provide a physician-paramedic Helicopter Emergency Medical Service (HEMS) in two regions of the United Kingdom. We investigated whether an association exists between prehospital mortality and distance from care in HEMS patients. We performed a retrospective study using spatial statistics to investigate the geographic distribution of scene outcome (alive versus deceased). We also performed multiple logistic regression of outcome against quartiles of distance from base to scene and a relative risk (RR) estimation over the operational areas. Organisations were analysed separately to assess consistency of spatial relationships. 2680 EHAAT and 4213 KSS patients met the inclusion criteria. Ripley’s K and Cross K functions indicated that outcomes (death and leaving the scene alive) cluster together. For KSS distance was not associated with outcome, for EHAAT distance was a significant predictor of mortality at furthest distance (41 to 95 km; OR 5.82, 95%CI 1.63 to 37.18, p = 0.019). Only one area of KSS and no areas of EHAAT had an increased RR of mortality. In contrast to previous research of pre-hospital patients, we found little evidence of geographic difference in scene outcome for trauma patients attended by the two HEMS services. Increased mortality risk for OHCA at the furthest distance from helicopter base was found in one organisation; a single area of increased RR of mortality was found for the other organisation.