Universität zu Köln

Rausch, Valentin, Kahmann, Stephanie L., Baltschun, Christoph, Staat, Manfred ORCID: 0000-0003-4363-6570, Mueller, Lars P. and Wegmann, Kilian (2020). Pressure Distribution to the Distal Biceps Tendon at the Radial Tuberosity: A Biomechanical Study. J. Hand Surg.-Am. Vol., 45 (8). PHILADELPHIA: W B SAUNDERS CO-ELSEVIER INC. ISSN 1531-6564

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Abstract

Purpose Mechanical impingement at the narrow radioulnar space of the tuberosity is believed to be an etiological factor in the injury of the distal biceps tendon. The aim of the study was to compare the pressure distribution at the proximal radioulnar space between 2 fixation techniques and the intact state. Methods Six right arms and 6 left arms from 5 female and 6 male frozen specimens were used for this study. A pressure transducer was introduced at the height of the radial tuberosity with the intact distal biceps tendon and after 2 fixation methods: the suture-anchor and the cortical button technique. The force (N), maximum pressure (kPa) applied to the radial tuberosity, and the contact area (mm(2)) of the radial tuberosity with the ulna were measured and differences from the intact tendon were detected from 60 degrees supination to 60 degrees pronation in 15 degrees increments with the elbow in full extension and in 45 degrees and 90 degrees flexion of the elbow. Results With the distal biceps tendon intact, the pressures during pronation were similar regardless of extension and flexion and were the highest at 60 degrees pronation with 90 degrees elbow flexion (23.3 +/- 53.5 kPa). After repair of the tendon, the mean peak pressure, contact area, and total force showed an increase regardless of the fixation technique. Highest peak pressures were found using the cortical button technique at 45 degrees flexion of the elbowand 60 degrees pronation. These differences were significantly different from the intact tendon. The contact area was significantly larger in full extension and 15 degrees, 30 degrees, and 60 degrees pronation using the cortical button technique. Conclusions Pressures on the distal biceps tendon at the radial tuberosity increase during pronation, especially after repair of the tendon. Clinical relevance Mechanical impingement could play a role in both the etiology of primary distal biceps tendon ruptures and the complications occurring after fixation of the tendon using certain techniques. Copyright (C) 2020 by the American Society for Surgery of the Hand. All rights reserved.)

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rausch, Valentin UNSPECIFIED UNSPECIFIED UNSPECIFIED Kahmann, Stephanie L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Baltschun, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Staat, Manfred UNSPECIFIED orcid.org/0000-0003-4363-6570 UNSPECIFIED Mueller, Lars P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wegmann, Kilian UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-324946
DOI:	10.1016/j.jhsa.2020.01.006
Journal or Publication Title:	J. Hand Surg.-Am. Vol.
Volume:	45
Number:	8
Date:	2020
Publisher:	W B SAUNDERS CO-ELSEVIER INC
Place of Publication:	PHILADELPHIA
ISSN:	1531-6564
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language REPAIR; RUPTURE; IMPINGEMENT Multiple languages Orthopedics; Surgery Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/32494