Austere Lower Extremity Splinting: A Head-To-Head Comparison of A New Novel 1-Step Spray-On Splint Verse Standard Splinting

Abstract

Category: Trauma Introduction/Purpose: Fracture immobilization in low resource environments is a critical and common aspect of austere medical care. However, there are few studies that critically investigate the efficacy and consistency of current practices. The purpose of this study was to compare austere immobilization techniques for lower extremity fractures while validating a splint application evlauation score sheet. Methods: Six orthopaedic surgical residents and 2 medical students participated in a prospective analysis of austere splinting techniques that utilized a cadaveric model with a distal third tibia-fibula fracture. Each participant was observed and scored by 3 Orthopaedic surgeons. All scoring was independent using a Likert scale based on 10 splinting criteria, including quality of radiographic reduction and time to completion. The participants utilized standard equipment that included structural aluminum malleable (SAM) splints and 6-inch ACE wraps in their first attempt. A second immobilization attempt was done with a 1-step spray-on foam splint. After each splinting attempt the reduction was verified with radiographic imaging. Results: The 1-step spray-on foam splinting technique was significantly superior (P <.05) in all parameters. Respectively yielding a mean score of 42.3 (range: 38-50), safety 4.7 (range: 3-5), longitudinal traction 4.5 (range: 3-5), time 136 seconds (range: 99-162). The standard splinting resulted in a mean score of 34.2 (22 - 46), safety 2.8 (range: 1- 5), longitudinal traction 4.1 (range: 3-5), time 169.5 seconds (range: 94-254). No catastrophic failures were noted in either group. A strong interobserver reliability was established. Conclusion: A 1-step spray-on foam splinting technique demonstrated consistent superiority in reducing fracture motion, potential soft-tissue damage, and sustained longitudinal traction as compared to the standard technique. Secondly, our results validate our splinting evaluation criteria allowing for further utilization in training austere splinting.