An Ex Vivo Model to Evaluate the Effect of Cyclical Adductory Forces on Maintenance of Arytenoid Abduction After Prosthetic Laryngoplasty Performed With and Without Mechanical Arytenoid Abduction. Issue 5 (5th April 2014)

• Record Type: Journal Article
• Authors: McClellan, Nathaniel R.; Santschi, Elizabeth M.; Hurcombe, Samuel D.A.; Litsky, Alan S.
• Is Part Of: Veterinary surgery. Volume 43:Issue 5(2014)
• Page Start: 598
• Page End: 605
• Publication Date: 2014-04-05
• Subjects: Veterinary surgery -- Periodicals; Veterinary Medicine -- Periodicals; Surgery -- Periodicals; Societies, Medical -- Periodicals; 636.0897
• DOI: 10.1111/j.1532-950X.2014.12178.x
• Languages: English
• ISSNs: 0161-3499

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="vsu12178-sec-0001" sec-type="section"> <title>Objectives</title> <p>To (1) develop a model of cyclical adduction force on an abducted left arytenoid cartilage that mimics swallowing or coughing; (2) determine if arytenoid abduction by a clamp before knot tying will improve the maintenance of abduction under cyclical adduction testing.</p> </sec> <sec id="vsu12178-sec-0002" sec-type="section"> <title>Study Design</title> <p>Experimental.</p> </sec> <sec id="vsu12178-sec-0003" sec-type="section"> <title>Sample Population</title> <p>Cadaveric equine larynges (n = 14).</p> </sec> <sec id="vsu12178-sec-0004" sec-type="section"> <title>Methods</title> <p>Left laryngoplasty performed using a single suture of #5 Ethibond with (n = 7) and without (n = 7) abducting the arytenoid with a clamp before knot tying. Each laryngoplasty was loaded cyclically from 2 to 26 N at 0.5 Hz for 5000 cycles in a servohydraulic test frame. Arytenoid displacement data were collected at 1 Hz intervals and median percent loss of abduction compared between groups. Significance was set at <italic>P</italic> < <monospace>.</monospace>05.</p> </sec> <sec id="vsu12178-sec-0005" sec-type="section"> <title>Results</title> <p>Median left arytenoid abduction distance was 16.9 mm (range, 9.8–19.8 mm). One larynx in each group failed at <1000 cycles. Loss of abduction was determined by progressive displacement of the testing actuator and confirmed by measurement. There was no difference in loss of abduction between clamped and non‐clamped larynges after 5000 cycles. This model of cyclical adduction resulted in arytenoid displacements similar to those seen in the 1st week postoperatively.</p> </sec> <sec id="vsu12178-sec-0006" sec-type="section"> <title>Conclusions</title> <p> <italic>Ex vivo</italic> cyclical adductory forces produced a significant loss of laryngoplasty abduction. The use of a clamp to abduct the arytenoid cartilage before knot tying did not reduce the loss of abduction.</p> </sec> </abstract>