Comparison of 2 Equine Transfixation Pin Casts and the Effects of Pin Removal. Issue 4 (7th April 2014)

• Record Type: Journal Article
• Authors: Williams, Jarred M.; Elce, Yvonne A.; Litsky, Alan S.
• Is Part Of: Veterinary surgery. Volume 43:Issue 4(2014)
• Page Start: 430
• Page End: 436
• Publication Date: 2014-04-07
• Subjects: Veterinary surgery -- Periodicals; Veterinary Medicine -- Periodicals; Surgery -- Periodicals; Societies, Medical -- Periodicals; 636.0897
• DOI: 10.1111/j.1532-950X.2014.12182.x
• Languages: English
• ISSNs: 0161-3499

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="vsu12182-sec-0001" sec-type="section"> <title>Objective</title> <p>To (1) compare strain on the dorsal aspect of the proximal phalanx (P1) between 2 types of transfixation pin casts (TPC) and (2) evaluate the change in strain as the pins are removed.</p> </sec> <sec id="vsu12182-sec-0002" sec-type="section"> <title>Study Design</title> <p>Experimental.</p> </sec> <sec id="vsu12182-sec-0003" sec-type="section"> <title>Animals</title> <p>Equine cadaver forelimbs (n = 10 pair).</p> </sec> <sec id="vsu12182-sec-0004" sec-type="section"> <title>Methods</title> <p>Each limb of a pair was assigned to 1 of 2 TPC constructs. Construct 1 consisted of a TPC with 2 positive profile, centrally threaded pins placed in the distal aspect of the third metacarpus (MC3) and construct 2 had 4 smooth Steinmann pins placed similarly. A strain gauge was mounted on P1 and axial compression (444.8–5337.9 N) applied. One forelimb of each pair was tested as a control with no construct in place. The 2 TPC groups were retested after removal of 1 proximal (n = 5 limbs) or distal (n = 5) pin from construct 1, and 2 proximal (n = 5) or distal (n = 5) pins from construct 2. Limb specimens were retested after all pins had been removed.</p> </sec> <sec id="vsu12182-sec-0005" sec-type="section"> <title>Results</title> <p>There was a significant decrease in strain between both TPC constructs and the non‐casted control at all loads except 444.8 N. There was no significant difference in strain reduction between the 2 TPC constructs. After proximal pin removal there was a 7% (construct 1) and 10% (construct 2) increase in strain. When distal pins were removed there was a 0.5% (construct 1) and 1% (construct 2) increase in strain. The difference between proximal and distal pin removal was only statistically different from each other at high loads.</p> </sec> <sec id="vsu12182-sec-0006" sec-type="section"> <title>Conclusion</title> <p>Both constructs provided equivalent reduction in strain. Removal of the proximal pin(s) increased the strain.</p> </sec> </abstract>