Ease of Use of Emergency Tourniquets on Simulated Limbs of Infants: Deliberate Practice

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Kragh JF, Wright-Aldossari B, Aden JK, Dubick MA 19(2). 41 - 47 (Journal Article)

Background: To investigate questions about application of emergency tourniquets in very young children, we investigated practices of Combat Application Tourniquet (C-A-T) use on a simulated infant-sized limb to develop ways to improve readiness for caregiving. Methods: This study was conducted as investigations of C-A-Ts used by two individuals in deliberate practice. The practice setup simulating a limb of infants aged 3−5 months included a handrail (circumference, 5.25 in.). This setup needed a specific modification to the instructions for use to adhere the band between the clips. Each user performed 100 practices. Results: With accrual of experience, application time was shorter for each user, on average in a power law of practice, and more ease was associated when less time was taken to apply the tourniquet. The ease of use was associated with accrued experience through deliberate practice of a tourniquet user while under coached learning. A check of tourniquet fit on a 4.25-in. limb also entailed the modification used in the 5.25-in. limb. However, an additional modification of wrapping the band in a figure-8 pattern around the rod was needed because the rod and clip could not meet. The fit on a 3.25-in. limb was impracticable for a workaround. Tourniquet use was harder for smaller limbs (i.e., 4.25 in. and 3.25 in.). A map of tourniquet fit was sketched of which sized limbs were too big, too small, within the fit zone, or at its borders. Conclusion: C-A-Ts mechanically fit the simulated limbs of infants aged 3−5 months, and C-A-T use was practicably easy enough to allow experienced users to fit tourniquets to limbs well using a specific modification of the routine technique. The findings and knowledge generated in this study are available to inform researches and developments in best preparation practices for instructing first aid.

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