The Efficacy of Chest Compressions in the Bell 407

An Air Medical Approach to In-Flight Cardiac Arrest Management

OBJECTIVE

Cardiac arrest during air medical transport is a complex and challenging issue, with unique factors such as limited physical space with restricted access to patients and equipment, small transport teams, limited resources, clinical isolation, effects of altitude, and the need for rapid decision making. The American Heart Association proposed 10 steps to improve outcomes of in-hospital cardiac arrest and serve as the framework for this article. This article aimed to explore these unique challenges and propose a contextual approach that might serve as the basis for improvement projects looking to improve outcomes for affected patients.

METHODS

This article represents a narrative review of the subject to consolidate the issue of cardiac arrest in the air medical setting specifically. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses literature search extension was used to guide the search strategy and methodology. The applicable items in the literature were selected through searches of the PubMed and Google Scholar databases. The Medical Subject Headings search terms used included "cardiopulmonary resuscitation" or "heart arrest" and "air ambulance" or "air medical transport,'' yielding 477 results. Screening for relevant results for inclusion was based on the relevance of the title or abstract. Articles not written in English or German or addressing commercial air transport were excluded. The reference lists of the included articles were searched for additional literature not included in the original search.

RESULTS

Three distinct phases are arbitrarily identified by the authors, and the results are discussed under the following headings: pre-arrest, intra-arrest, and post-arrest phases. The pre-arrest phase is characterized by a wide array of concepts such as appropriate goals of care, advanced preparation and action, good clinical governance, patient assessment and handover, system design and ergonomics, sterile cockpit management, appropriate alarm management, and contingency planning in the case of failed resuscitation. The intra-arrest phase is characterized by the contextualization of the usual resuscitation approach, and specific recommendations for immediate nonresuscitative actions, history, hazards, help, airway, breathing, circulation, drugs, and reversible causes are suggested. The post-arrest phase highlights the vulnerable nature of the post-cardiac arrest patient in the air medical setting. Specific considerations regarding postresuscitation care and practitioner well-being are highlighted.

CONCLUSION

This article outlines a systematic approach to various physical, clinical, mental, and systemic factors that can be used during various phases of the transport journey as well as the individual patient journey. This overview sensitizes individual clinicians or program directors to the factors needing consideration when looking to improve cardiac arrest patient outcomes.

How to Handle In-Flight Death in International Patient Repatriation and Air Ambulance Operations

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.

Mechanical Cardiopulmonary Resuscitation's Role in Helicopter Air Ambulances: A Narrative Review

Helicopter emergency medical services (HEMS) frequently respond to out-of-hospital cardiac arrest (OHCA) situations. Some have speculated mechanical cardiopulmonary resuscitation (mCPR) may be able to rectify the inadequacy of human performance of cardiopulmonary resuscitation (CPR) during transport. A number of studies have examined the performance of mCPR devices in the air medical setting specifically. Many aspects of the HEMS environment seem uniquely conducive to mCPR, and a growing body of research seems to suggest mCPR holds promise for the treatment of cardiac arrest by HEMS clinicians. Simulation studies show that mCPR leads to improved CPR performance compared with manual CPR in HEMS. Case reports and the experience of several HEMS programs suggest that mCPR can be effectively integrated into HEMS care. However, further research regarding the effectiveness of mCPR in the HEMS environment and in general cardiac arrest care is needed.

Automated Versus Manual Cardiopulmonary Resuscitation in Flight: Are We Being Safe?

OBJECTIVE

The primary purpose of this study was to compare the percentage of return of spontaneous circulation of in-flight cardiac arrest (IFCA) patients on admission to the emergency department (ED) who received in-flight standard cardiopulmonary resuscitation (s-CPR) versus automated cardiopulmonary resuscitation (a-CPR).

SETTING

EMS helicopter (HEMS) service in Midwest USA.

METHODS

This was a prospective, consecutive case series of adult patients who had IFCA of any cause managed with a-CPR between October 1, 2012, and February 8, 2016 (40 months), at a helicopter emergency medical service (HEMS) in the Midwestern United States. The series was compared with a historical control of patients who had IFCA managed by s-CPR between June 1, 2009, and September 30, 2012 (40 months).

RESULTS

Ninety-five runs (39 s-CPR and 54 a-CPR) were included. There was no significant difference in survival between the 2 groups upon HEMS leaving the ED. Cardiopulmonary resuscitation was performed for a significantly longer period of time in the a-CPR cohort than in the s-CPR cohort, and a significantly higher percentage of patients were undergoing active compressions upon loading into the aircraft in the a-CPR cohort.

CONCLUSION

There was no difference in return of spontaneous circulation on ED admission between the 2 compression methodologies. In-flight use of a-CPR allows HEMS providers to be safe and compliant with Federal Aviation Administration regulations. It also meets the public and medical profession's expectations of the treatment of IFCA with high-quality cardiopulmonary resuscitation by HEMS.

Aeromedical helicopter transport of prisoners: The Mexico City experience

INTRODUCTION

Helicopter medical transport of prisoner patients has unique logistical and medical challenges, as well as potential risks to healthcare providers. Prisoners have specific requirements for safe transport, and it is of paramount importance to know the variables related to transport related mortality since most prisoners that need air evacuation are critically ill. Because we understand that there is a potentially dangerous nature of transport of this population, and because of the unique nature of them, we aimed to provide a detailed insight on predictors of outcome in prisoners who were injured as a result of trauma and that needed to be transported via air medical transport in Mexico City.

METHODS

A retrospective chart analysis was conducted using data from the Mexico City Police Helicopter Emergency Medical Service (HEMS) for air medical transport of felons that occurred between January 1, 2000 and December 31, 2013. Subject demographics, injury, procedures performed, transport time, Glasgow Coma Scale (GCS), and mortality were collected. Exploratory data analysis, Chi-square, and T-test were performed. Statistical significance was assumed to be p ≤ 0.05 for two-sided hypothesis.

RESULTS

Fifty-three patients were included in this study. Forty-two were men and 11 were women. Median age of the patients was 30 ± 8 years. Total transport time was 23 ± 5 min. Gunshot wounds accounted for 39.6% of patients, stabbing wounds 28.3%, head trauma 7.5%, motor vehicle accidents 5.7%, blunt trauma (i.e., fist assaults) 5.6%, falls 5.7%, motorcycle accidents 3.8%, and prisoner-motor vehicle collisions 3.8%. Median heart rate was 114 ± 41 beats per minute (BPM), median systolic blood pressure (SBP) was 103 ± 14 mmHg, median diastolic blood pressure (DBP) was 70 ± 12 mmHg, and median GCS was 10 ± 5. Mortality rate was 16.9% (n = 9). The variables that were statistically significant, and therefore related to mortality were: heart rate > 130 bpm (p < 0.001), SBP <95 mmHg (p = 0.039), GCS <7 (p = 0.040), age > 42 years (range, 17-47 years) p < 0.001, and need for cardiopulmonary resuscitation (CPR) (p < 0.001).

CONCLUSIONS

As dangerous and challenging as it may seem, air medical transport of prisoners by a police crew physician, may be safe and reliable, since no complications or safety events were observed.