OBJECTIVE: Traumatic brain injuries (TBIs) are a leading cause of death and disability worldwide. Establishing TBI guidelines is crucial for prehospital management. Civilian medical practices are often influenced by mili...OBJECTIVE: Traumatic brain injuries (TBIs) are a leading cause of death and disability worldwide. Establishing TBI guidelines is crucial for prehospital management. Civilian medical practices are often influenced by military trauma guidelines. This study provides a comparative analysis of prehospital TBI management by a civilian air medical evacuation service using civilian guidelines and military clinical practice guidelines from the Joint Trauma System of the Department of Defense. METHODS: A retrospective review of 100 deidentified patient transport logs from a prominent civilian air medical service was conducted. The logs were compared with the service's patient care guidelines and the 2023 Joint Trauma System Clinical Practice Guidelines. Data were analyzed for adherence to 14 metrics. RESULTS: Patients showed improvement in preflight and postflight Glasgow Coma Scale scores and were managed according to recommendations on head elevation, oxygenation, blood pressure, and temperature by both organizations. Discrepancies between guidelines included differences in the management of ventilator settings, blood pressure, oxygenation, temperature, serum glucose, intracranial hypertension, suspected brain herniation, serum sodium levels, and seizure prophylaxis. CONCLUSION: Comparing civilian and military guidelines highlights areas for potential improvements in TBI management, such as integrating advanced monitoring and the implementation of (i-STAT, Abbott Laboratories, Chicago, IL) testing in air transport to enhance patient care and outcomes.
OBJECTIVE: Acute aortic dissection (AAD) is a life-threatening condition that necessitates rapid medical intervention. In Japan, helicopter emergency medical services (HEMS) are deployed using either keyword-based early...OBJECTIVE: Acute aortic dissection (AAD) is a life-threatening condition that necessitates rapid medical intervention. In Japan, helicopter emergency medical services (HEMS) are deployed using either keyword-based early requests or standard requests from ground emergency medical services (GEMS). This study evaluates the impact of these request methods on patient outcomes. METHODS: We conducted a retrospective cohort study using data from the Japanese Society for Aeromedical Services registry from April 2015 to March 2020. A total of 342 AAD patients transported by HEMS were analyzed, excluding those with out-of-hospital cardiac arrest. Patients were categorized based on whether HEMS was requested using a keyword method or after initial GEMS contact. We compared the groups on time intervals, prehospital interventions, and outcomes including Cerebral Performance Category. RESULTS: The time from GEMS awareness to HEMS contact was significantly shorter in the keyword methods group compared with the control group (median 27 vs. 33 minutes, respectively; P < .001). No significant difference was observed in the time from contact to departure from the scene. Patient characteristics, vital signs at HEMS staff contact, and medical interventions provided by HEMS staff showed no statistically significant differences. Changes in vital signs from HEMS staff contact to hospital arrival included a significant decrease in the respiratory rate and systolic blood pressure. Patients in the keyword methods group had a significantly higher proportion of favorable outcomes in terms of Cerebral Performance Category compared with the control group (77.2% vs. 66.5%, P = .03). However, logistic analysis did not show significant differences (odds ratio = 1.007; 95% confidence interval, 0.987-1.016; P = .814). CONCLUSION: Keyword methods for early HEMS requests may appear to reduce time to specialty care and suggest improvement of outcomes for patients with AAD.
OBJECTIVE: Typical reasons for calling the rescue helicopter are medical emergencies, such as heart disease, trauma, and neurologic emergencies. However, there are also a small number of patients with attempted or comple...OBJECTIVE: Typical reasons for calling the rescue helicopter are medical emergencies, such as heart disease, trauma, and neurologic emergencies. However, there are also a small number of patients with attempted or completed suicide. The aim of this article was a general analysis and evaluation of the specific circumstances of emergencies related to suicide or attempted suicide in the prehospital environment involving the rescue helicopter (helicopter emergency medical services) Christoph 38 of the DRF Stiftung Luftrettung gAG based in Dresden, Germany. METHODS: The data of all emergency interventions performed by the helicopter emergency medical services in Dresden, Germany, between January 1, 2008, and December 31, 2020, were analyzed by examining the DIVI rescue protocols and electronic data (MEDAT and HEMSDER (Convexis, Germany)) with regard to suicide-related variables. The time, methods and information about the reason, sociodemographic data, and results of medical treatment were recorded and retrospectively analyzed. RESULTS: There were a total of 17,754 emergencies during the study period. Of these, 277 cases (1.56%) were due to suicide. The average time for the emergency services to arrive at the scene of the emergency was 11.14 minutes. There were 52 patients with a completed suicide, 183 with a suicide attempt, and 42 patients with a suicide threat. Eleven were pronounced dead before or at the time of arrival of the emergency doctor. Of the 241 patients who were still alive when the emergency physician arrived, 101 were endotracheally intubated and mechanically ventilated, and 25 patients received cardiopulmonary resuscitation. In 19.57% of the patients, health problems were noted as the primary reason for attempted/completed suicide. In a further 12.68%, partnership problems or the loss of a partner were cited. The most common method used was an overdose (49.39%) followed by leaping from a great height (20%) and hanging (15.51%). Stab wounds and gunshot wounds were observed in 24% of the cases. The overall mortality rate was 18.77%. The method used, sex, and a suicide note were identified as possible influencing factors for the fatal outcome of a suicide. CONCLUSION: The number of suicide victims is low compared with the total number of 17,754 deployments. However, the mortality rate for these missions is quite high at 18%. Although some factors and circumstances could be identified in this study, many backgrounds and explanations are still missing. Therefore, this study shows a general need for more research in regard to better prevention as well as improved education and training of emergency response teams.
OBJECTIVE: The aim of this study was to determine the utility of the Triage Revised Trauma Score (TRTS), Glasgow Coma Scale/Age/systolic Pressure (GAP) score, and Shock Index (SI) in predicting in-flight hypotension and...OBJECTIVE: The aim of this study was to determine the utility of the Triage Revised Trauma Score (TRTS), Glasgow Coma Scale/Age/systolic Pressure (GAP) score, and Shock Index (SI) in predicting in-flight hypotension and the need for critical care interventions in air medical trauma patients. METHODS: A retrospective review of 3,582 air medical trauma cases from a 3-year period in Queensland was conducted. An initial TRTS, GAP score, and SI were calculated for each patient, and the lowest in-flight mean arterial pressure and systolic blood pressure were determined. The institution of in-flight critical care interventions was also recorded, including fluid resuscitation, vasopressors, and surgical procedures. The utility of the TRTS, GAP score, and SI for predicting in-flight hypotension was then examined using receiver operating characteristic curves. RESULTS: All 3 approaches showed minor predictive value, with the GAP score performing slightly better than TRTS and SI for predicting in-flight interventions. The GAP score had a receiver operating characteristic area under the curve of 0.76 compared with 0.74 for the TRTS and SI. CONCLUSION: No score demonstrated sufficient predictive ability for deterioration in transit to be used clinically.
OBJECTIVE: The aim of this study was to determine the first-pass intubation success rates of air medical providers using direct laryngoscopy, channeled blade video laryngoscopy, and nonchanneled blade video laryngoscopy....OBJECTIVE: The aim of this study was to determine the first-pass intubation success rates of air medical providers using direct laryngoscopy, channeled blade video laryngoscopy, and nonchanneled blade video laryngoscopy. METHODS: This was a retrospective cohort study of the Orlando Health Air Care Team (ACT) airway quality registry over a 5-year period. The ACT had 3 approved approaches for endotracheal intubation: direct laryngoscopy, the King Vision (Ambu, Ballerup Denmark) channeled blade laryngoscope, or the C-MAC (Karl-Storz, Tuttlingen Germany) (nonchanneled) laryngoscope. The main outcome was the first-pass success rate. The secondary outcomes included the number of attempts, the overall success rate, and complications. RESULTS: Of 517 intubations, 312 were performed with direct laryngoscopy, 126 with a channeled video laryngoscope, and 79 with a nonchanneled laryngoscope. The mean number of attempts was 1.26, and the overall success rate was 93%. Use of the nonchanneled video laryngoscope had a higher first-pass success rate than direct or channeled laryngoscopy (92% vs. 76% and 78%, P = .006), required fewer attempts (1.09 [95% confidence interval (CI), 1.01-1.17] vs. 1.29 [95% CI, 1.23-1.35] and 1.28 [95% CI, 1.18-1.38], P < .001), and a higher overall success rate for intubation (99% vs. 90% and 95%, P = .018). CONCLUSION: The use of a nonchanneled video laryngoscope provided higher first-pass success rates, fewer total attempts, and higher overall success rates.
OBJECTIVE: Isopropyl alcohol (IPA) aromatherapy provides rapid relief of nausea at minimal cost, is universally available, and has no known significant adverse effects. These attributes make it ideal for the prehospital...OBJECTIVE: Isopropyl alcohol (IPA) aromatherapy provides rapid relief of nausea at minimal cost, is universally available, and has no known significant adverse effects. These attributes make it ideal for the prehospital setting. However, there is no published research on the use of IPA in critical care transport (CCT). The objective of this study was to investigate if CCT patients experience improvement of nausea with IPA aromatherapy. METHODS: A retrospective chart review was performed over a 2-year period on adult patients served by a Midwest CCT system that provides both air and ground transport. Data were obtained 1 year before and 1 year after a protocol change in which the first-line antiemetic was changed from intravenous ondansetron (prechange) to inhaled IPA (postchange). The IPA was administered by placing a pad under the patient's nares as they inhaled. The proportion of nausea improvement was compared between the prechange and postchange periods. RESULTS: Two hundred seventeen records were included. In helicopter emergency medical services, 33 of 50 (66.0%) patients reported improvement with ondansetron, and 13 of 21 (61.9%) reported improvement with IPA (P = .742). Patients transported by ground emergency medical services showed improvement in 65 of 73 (89.0%) cases for ondansetron and 40 of 73 (54.8%) for IPA (P < .001). CONCLUSION: There was no difference in the proportion of nausea improvement between ondansetron and IPA in helicopter emergency medical services patients. In ground emergency medical services patients, more patients had nausea improvement with ondansetron compared with IPA. This study suggests IPA may be a faster, more efficacious alternative for nausea relief in CCT patients.
OBJECTIVE: Deep sedation of mechanically ventilated patients is associated with poorer outcomes, including longer hospital length of stay and more ventilator days. In contrast, light sedation is associated with decreased...OBJECTIVE: Deep sedation of mechanically ventilated patients is associated with poorer outcomes, including longer hospital length of stay and more ventilator days. In contrast, light sedation is associated with decreased hospital and intensive care unit length of stay, lower ventilator days, and decreased mortality. This study sought to decrease the use of unindicated deep sedation and benzodiazepine use in mechanically ventilated patients during critical care transport. Previous work identified > 90% of intubated, nonparalyzed patients were deeply sedated in this critical care transport system. METHODS: This study was conducted at a critical care transport service affiliated with a rural academic medical center. Chart review of all mechanically ventilated adults transported between January and November 2023 with no indication for deep sedation was performed. Improvement initiatives were implemented using Plan-Do-Study-Act cycles and included transport crew education, guideline revision, and enhanced performance feedback. RESULTS: A 25% reduction in the proportion of deeply sedated patients was achieved. CONCLUSION: Deep sedation is not universally indicated in critical care transport of mechanically ventilated patients. This quality improvement initiative achieved its main aim of reducing the proportion of deeply sedated patients by 25% with the implementation of 3 Plan-Do-Study-Act cycles.
OBJECTIVE: Acute ischemic stroke caused by large vessel occlusion (LVO) occurs frequently and benefits from endovascular therapies available at comprehensive stroke centers (CSCs). Prehospital stroke severity tools have...OBJECTIVE: Acute ischemic stroke caused by large vessel occlusion (LVO) occurs frequently and benefits from endovascular therapies available at comprehensive stroke centers (CSCs). Prehospital stroke severity tools have been devised to detect LVO. The goal of this study was to assess the value of the Rapid Arterial Occlusion Evaluation (RACE) score in helicopter air ambulance (HAA) activation. METHODS: A retrospective assessment of RACE scales > 4 performed by prehospital providers was used in order to activate HAAs. Descriptive statistics were obtained for patients transported, with the primary goal of determining the positive predictive values of the RACE scale for LVO occlusions. The secondary outcomes assessed if patients without LVO had other conditions requiring a CSC. RESULTS: Data from 136 subjects were analyzed; 53 (39.0%) were true LVO cases as defined by computed tomographic imaging, computed tomography angiographic imaging, or magnetic resonance imaging. Mechanical thrombectomy occurred in 30 cases (22.1%), with 63 (46.4%) requiring a neurologic intervention. There were 83 (61%) false positives (no LVO on imaging). Of these false positives, 28 (20.6%) were non-LVO strokes, 22 (16.1%) were intracranial hemorrhages, and 8 (5.9%) had neurologic conditions requiring CSC care. CONCLUSION: A RACE scale > 4 is an effective triage tool that delivers potential thrombectomy candidates to CSCs. When there is a false positive, the majority of patients require CSC care and benefit from direct transport from the scene.
OBJECTIVE: Helicopter air ambulance (HAA) services are essential to air medical transport in the United States. However, HAA accidents, incidents, and fatalities have been a reason for concern for HAA operations. This ar...OBJECTIVE: Helicopter air ambulance (HAA) services are essential to air medical transport in the United States. However, HAA accidents, incidents, and fatalities have been a reason for concern for HAA operations. This article analyzes the numbers, proportions, contributing or causal factors, and defining events of HAA accidents in the United States from 2010 to 2021. METHODS: The National Transportation Safety Board final investigation reports, defining events, findings, and summary data were analyzed for 83 HAA accidents in the United States from 2010 to 2021. The 2 proportions test was used to compare the proportions of fatal HAA accidents between 2010-2015 and 2016-2021. RESULTS: The data show that 21/47 (45%) of HAA accidents in 2010-2015 and 6/36 (17%) in 2016-2021 were fatal, representing a significant (P < .01) reduction in the proportion of fatal accidents in 2016-2021 from 2010-2015 time period. VFR encounter IMC events accounted for 9/47 (19%) of HAA accidents in 2010-2015 and 1/36 (3%) accident in 2016-2021, representing a significant (P < .05) reduction in VFR encounter IMC accidents. CONCLUSION: There was a statistically significant decrease in the proportion of fatal HAA accidents from 2010-2015 to 2016-2021, which may be attributable to the changes in the regulatory framework, training protocols, safety awareness initiatives, and technological advancements to address HAA safety.
OBJECTIVE: Models recommending continuous sedation combined with specific tools to assess sedation depth during pediatric transport do not exist. Published studies demonstrate that nurse-driven sedation protocols yield m...OBJECTIVE: Models recommending continuous sedation combined with specific tools to assess sedation depth during pediatric transport do not exist. Published studies demonstrate that nurse-driven sedation protocols yield more consistent levels of appropriate sedation. METHODS: A retrospective review in 2020 of mechanically ventilated pediatric transport patients at this institution demonstrated that 60.7% received neuromuscular blockade. This higher than anticipated neuromuscular blockade usage indicated an opportunity to improve sedation management. The primary aim of this quality improvement project is to decrease neuromuscular blockade use to < 30% of intubated pediatric patients cared for by our critical care transport team. To achieve this, we aimed to improve patient sedation by increasing the use of continuous sedation medication infusions to > 75% of patients by the first quarter of 2022. The initiative took place with a hospital-based pediatric/neonatal critical care transport team. RESULTS: Continuous sedation infusions increased using protocolized sedation from 10.7% at baseline to a sustained rate of 88% with dexmedetomidine (76.3%) and propofol (13.6%) as primary medications. The percentage of patients receiving neuromuscular blockade decreased in stepwise fashion from the initial 60.7% to 8.3%. CONCLUSION: This project demonstrated sustained improvement in continuous sedation and decrease in neuromuscular blockade use through the initiation of a continuous sedation protocol in transport.
The University of Chicago Aeromedical Network (UCAN) was established in 1983 and has been providing critical care transport via both air and ground in and around the Chicago area for over 40 years. Over that time, the pr...The University of Chicago Aeromedical Network (UCAN) was established in 1983 and has been providing critical care transport via both air and ground in and around the Chicago area for over 40 years. Over that time, the program has transported thousands of critically ill individuals, including complex specialty populations, while also maintaining a safe transport environment for its crew members and patients. UCAN has had a profound impact not only on its patients, but also on the entire transport community by providing continuing education, conducting vital safety research while maintaining the highest safety standards, and driving the industry forward through service and leadership. Since inception, the program has experienced many changes, including the transition from a traditional hospital-based program to an alternate delivery model and the conversion of the crew from a nurse-physician team to a nurse-nurse configuration. These changes have allowed for continuous evolution within UCAN, including the introduction of internal process improvements that focus on quality, safety and education, growth of the communications team and its capabilities, and expansion of UCAN's commitment to outreach and education for its community partners.
In June 2024, leaders in aviation medicine from across the United States, Canada, and Europe met for the sixth Leonardo Helicopters/Association of Critical Care Transport: The Path to High Reliability Futures of Aviation...In June 2024, leaders in aviation medicine from across the United States, Canada, and Europe met for the sixth Leonardo Helicopters/Association of Critical Care Transport: The Path to High Reliability Futures of Aviation Medicine Symposium in Miami, FL. The symposia, now held every few years, grew from the 2003 Air Medical Leadership Congress: Setting the Healthcare Agenda for the Air Medical Community. The meetings' goal is to gather leaders to distill, debate, and synthesize the state of the science while identifying, refining, and outlining conditions facilitating favorable evolution in civilian aviation medicine. Structured as thematic panel presentations followed by interactive all-attendee roundtable discussions, the gatherings build and expand an international network of thought leaders and proven doers. Meeting attendees have a common goal-accelerating learning and practice among early and developed systems moving toward a shared worldwide agenda for the future of aviation transport medicine.
In-flight cardiac arrest is a rare event that occurs at a rate of approximately 1 event in 3.8 to 4.7 million commercial airline passengers and at a rate of approximately 1 event in 1,500 to 3,000 patients transported by...In-flight cardiac arrest is a rare event that occurs at a rate of approximately 1 event in 3.8 to 4.7 million commercial airline passengers and at a rate of approximately 1 event in 1,500 to 3,000 patients transported by fixed wing international air medical transport. Only 13% to 19% of victims of in-flight cardiac arrest can be successfully resuscitated. The arrival of an aircraft with a deceased patient/passenger on board triggers a country-specific procedure that focuses on public health and medicolegal considerations. In most jurisdictions, these procedures are detailed in the respective national Aeronautical Information Publication, which are commonly based on the International Civil Aviation Organization International Standards and Recommended Practices, Annex 9 to the Convention on International Civil Aviation. Awareness among medical and flight crews on such procedures will support appropriate documentation of the event and enable effective cooperation with the relevant local authorities.
Acute airway obstruction, whether partial or complete, requires immediate intervention to prevent fatal outcomes. An 81-year-old man with a history of pneumonia experienced respiratory distress after attempting to swallo...Acute airway obstruction, whether partial or complete, requires immediate intervention to prevent fatal outcomes. An 81-year-old man with a history of pneumonia experienced respiratory distress after attempting to swallow a large piece of meat. Despite attempts by his daughter, back blows and abdominal thrusts failed to dislodge the obstruction, and he collapsed, prompting an emergency call. Upon the arrival of the emergency medical team, the patient was conscious with good oxygen saturation but deteriorated during transport, becoming unresponsive and unable to cough. Upon assessment by the doctor helicopter team, the patient's condition was critical with low oxygen saturation and unstable vital signs. Using a laryngoscope, the team identified a large meat fragment near the vocal cords and successfully removed it, relieving the obstruction. The patient's respiratory distress improved, and he was transported to the hospital without the need for intubation. Further examination at the hospital revealed sinus tachycardia and lung abnormalities on a computed tomography scan but no significant abnormalities in blood tests. The patient was admitted for observation and received antibiotics for prophylaxis. He recovered well, with no further need for oxygen by the second day and was discharged on the fourth day, highlighting the importance of prompt intervention in airway emergencies.
In the acute setting, subglottic stenosis poses a unique airway management challenge, particularly when presenting to a facility where subspecialty care is not available. We present a case of idiopathic subglottic stenos...In the acute setting, subglottic stenosis poses a unique airway management challenge, particularly when presenting to a facility where subspecialty care is not available. We present a case of idiopathic subglottic stenosis with acute respiratory distress managed at a community hospital to highlight the challenges of diagnosis, initial airway management, and mechanical ventilation of this rare but life-threatening condition.