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Conclusion 18. Adams BD, et al. Registry of emergency airways arriving at com-
bat hospitals. J Trauma. 2008;64(6):1548–1554.
We found no difference in short-term outcomes between com- 19. Lairet JR, et al. Prehospital interventions performed in a combat
bat casualties who received an SGA versus cricothyrotomy. zone: a prospective multicenter study of 1,003 combat wounded.
Military prehospital personnel rarely used either advanced J Trauma Acute Care Surg. 2012;73(2 suppl 1):S38–S42.
airway intervention during the recent conflicts in Afghanistan 20. Gerhardt RT, Berry JA, Blackbourne LH. Analysis of life-saving
and Iraq. interventions performed by out-of-hospital combat medical per-
sonnel. J Trauma. 2011;71(1 suppl):S109–S113.
21. Amack AJ, et al. Comparison of ventilation with one-handed
Acknowledgments mask seal with an intraoral mask versus conventional cuffed
The authors thank the Joint Trauma System Data Analysis face mask in a cadaver model: a randomized crossover trial. Ann
Branch for their efforts with data acquisition. Emerg Med. 2017;69(1):12–17.
22. Reed P, et al. Single rescuer ventilation using a bag valve mask
Disclaimer with removable external handle: a randomized crossover trial.
Prehosp Disaster Med. 2017:1–6.
Opinions or assertions contained herein are the private views 23. Zobrist B, Casmaer M, April MD. Single rescuer ventilation us-
of the authors and are not to be construed as official or as ing a bag-valve mask with internal handle: a randomized cross-
reflecting the views of the Department of the Air Force, the over trial. Am J Emerg Med. 2016;34(10):1991–1996.
Department of the Army, or the Department of Defense. 24. Kaji AH, Schriger D, Green S. Looking through the retrospecto-
scope: reducing bias in emergency medicine chart review studies.
Funding Ann Emerg Med. 2014;64(3):292–298.
No funding was received for this study. 25. Robinson JB, et al. Battlefield documentation of tactical combat
casualty care in Afghanistan. US Army Med Dep J. 2016;(2–16):
87–94.
Disclosure
The authors have nothing to disclose.

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