• Am J Emerg Med · Sep 2012

    Paramedics successfully perform humeral EZ-IO intraosseous access in adult out-of-hospital cardiac arrest patients.

    • Daniel Schwartz, Scotty Bolleter, David Wampler, Joi Shumaker, Robert Beckett, and Craig Manifold.
    • Department of Emergency Health Sciences, University of Texas Health Science Center San Antonio, San Antonio, TX 78229, USA. wamplerd@uthscsa.edu
    • Am J Emerg Med. 2012 Sep 1;30(7):1095-9.

    ObjectiveStudies on humeral placement of the EZ-IO (Vidacare, Shavano Park, TX, USA) have shown mixed results. We performed a study to determine the first-attempt success rate at humeral placement of the EZ-IO by paramedics among prehospital adult cardiac arrest patients.MethodsA retrospective cohort analysis of data prospectively collected over a 9-month period. Data are a subset extracted from a prehospital cardiac arrest study. The cohort consisted of adult cardiac arrest patients in whom the EZ-IO placement was attempted in the humerus by paramedics. Choice of vascular access was at the discretion of the paramedic; options included tibial or humeral EZ-IO and intravenous. Primary outcome is the percentage of successful placements (stable, flow, without extravasation) on first attempt. Secondary outcomes are overall successful placement, complications, and reason for failure. Data were collected during a post-cardiac arrest interview.ResultsHumeral intraosseous (IO) access was attempted in 61% (n = 247) of 405 cardiac arrests evaluated with mean age of 63 (±16) years, 58% male. First-attempt successful placement was 91%. Successful placement was 94%, considering the second attempts. In the unsuccessful attempts, 2% reported obesity as the cause, 1% reported stable placement without flow, and 2% reported undocumented causes for failure. There were also 2% reports of successful placement with subsequent dislodgement.ConclusionsThe results of this study suggest a high degree of paramedic proficiency in establishment of IO access in the proximal humerus of the out-of-hospital cardiac arrest. Few complications suggest that proximal humeral IO access is a reliable method for vascular access in this patient population.Copyright © 2012 Elsevier Inc. All rights reserved.

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