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Comparative Study
Journal Article
Combat MEDEVAC: A comparison of care by provider type for en route trauma care in theater and 30-day patient outcomes.
Journal of Trauma and Acute Care Surgery 2016 November
BACKGROUND: Medical evacuation (MEDEVAC) is the movement and en route care of injured and medically compromised patients by medical care providers via helicopter. Military MEDEVAC platforms provide lifesaving interventions that improve survival in combat. There is limited evidence to support decision making related to en route care and allocation of resources. The association between provider type and en route care is not well understood. Our objective was to describe MEDEVAC providers and identify associations between provider type, procedures performed, and outcomes.
METHODS: We conducted an institutional review board-approved, retrospective record review of patients traumatically injured in combat, evacuated by MEDEVAC from the point of injury, between 2011 and 2014. Data abstracted included injury description, provider type, procedures performed, medications administered, survival, and 30-day outcomes. Subjects were grouped according to provider type: medics, paramedics, and ADVs (advanced-level providers to include nurses, physician assistants, and physicians). Groups were compared. Analyses were performed using χ tests for categorical variables and analysis of variance tests (Kruskal-Wallis tests) for continuous variables; p < 0.05 was considered significant.
RESULTS: The MEDEVAC records were reviewed, and data were abstracted from 1,237 subjects. The providers were composed of medics, 76%; paramedics, 21%; and ADVs, 4%. Patient and injury demographics were similar among groups. The ADVs were most likely to perform intubation, chest needle decompressions (p < 0.0001), and hypothermia prevention (p = 0.01). Paramedics were most likely to administer blood en route (p < 0.0001). All other procedures were similar between groups. Paramedics were most likely to administer ketamine (p < 0.0001), any analgesic (p < 0.0001), or any medication en route (p < 0.0001). Incidence rates of en route events (pain, hypoxia, abnormal hemodynamics, vital signs) were similar between provider types. In-theater and 30-day survival rates were similar between provider types.
CONCLUSION: Providers with higher-level training were more likely to perform more advanced procedures during en route care. Our study found no significant association between provider type and in-theater or 30-day mortality rates. Upon subgroup analysis, no difference was found in patients with an injury severity score greater than 16. More evidence is needed to determine the appropriate level of MEDEVAC personnel training and skill maintenance necessary to minimize combat mortality.
LEVEL OF EVIDENCE: Therapeutic study, level III.
METHODS: We conducted an institutional review board-approved, retrospective record review of patients traumatically injured in combat, evacuated by MEDEVAC from the point of injury, between 2011 and 2014. Data abstracted included injury description, provider type, procedures performed, medications administered, survival, and 30-day outcomes. Subjects were grouped according to provider type: medics, paramedics, and ADVs (advanced-level providers to include nurses, physician assistants, and physicians). Groups were compared. Analyses were performed using χ tests for categorical variables and analysis of variance tests (Kruskal-Wallis tests) for continuous variables; p < 0.05 was considered significant.
RESULTS: The MEDEVAC records were reviewed, and data were abstracted from 1,237 subjects. The providers were composed of medics, 76%; paramedics, 21%; and ADVs, 4%. Patient and injury demographics were similar among groups. The ADVs were most likely to perform intubation, chest needle decompressions (p < 0.0001), and hypothermia prevention (p = 0.01). Paramedics were most likely to administer blood en route (p < 0.0001). All other procedures were similar between groups. Paramedics were most likely to administer ketamine (p < 0.0001), any analgesic (p < 0.0001), or any medication en route (p < 0.0001). Incidence rates of en route events (pain, hypoxia, abnormal hemodynamics, vital signs) were similar between provider types. In-theater and 30-day survival rates were similar between provider types.
CONCLUSION: Providers with higher-level training were more likely to perform more advanced procedures during en route care. Our study found no significant association between provider type and in-theater or 30-day mortality rates. Upon subgroup analysis, no difference was found in patients with an injury severity score greater than 16. More evidence is needed to determine the appropriate level of MEDEVAC personnel training and skill maintenance necessary to minimize combat mortality.
LEVEL OF EVIDENCE: Therapeutic study, level III.
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