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Measurement of shoulder abduction angles in dogs: an ex vivo study of accuracy and repeatability


Jones, Stephen C; Howard, James; Bertran, Judith; Johnson, Brittney; Pozzi, Antonio; Litsky, Alan S; Wittum, Thomas E; Kieves, Nina (2019). Measurement of shoulder abduction angles in dogs: an ex vivo study of accuracy and repeatability. Veterinary and Comparative Orthopaedics and Traumatology:Epub ahead of print.

Abstract

OBJECTIVE: The aim of this study was to determine the accuracy and repeatability of the shoulder abduction test and to assess the effect of transection of the medial shoulder support structures in canine cadavers.
MATERIALS AND METHODS: The shoulder abduction angle was measured by three separate observers, both with the shoulder extended and at a neutral angle. Shoulder abduction was then measured, using craniocaudal fluoroscopic images. Arthroscopy was performed in all shoulder joints, with the medial support structures transected in one shoulder of each dog. The three observers again measured shoulder abduction angles in all dogs. Shoulder abduction was measured again using fluoroscopy. Accuracy and repeatability of the abduction test were assessed using linear mixed models.
RESULTS: All three observers had different measured abduction angles when compared with fluoroscopy ( < 0.01); however, the experienced surgeon had an error of only 2.9°. Inter-observer repeatability was poor, with all three observers having different abduction measurements ( < 0.001). Intra-observer repeatability, however, indicated no differences on repeated measurements ( = 0.26). Placing the shoulder at a neutral standing angle, and transection of support structures caused an average increase in abduction by 8.2° ( < 0.001) and 4.4° respectively.
CONCLUSION: Significant variation exists between observers performing this test, increased accuracy seen in the more experienced observer. Shoulder flexion angle can significantly affect measured abduction angles.

Abstract

OBJECTIVE: The aim of this study was to determine the accuracy and repeatability of the shoulder abduction test and to assess the effect of transection of the medial shoulder support structures in canine cadavers.
MATERIALS AND METHODS: The shoulder abduction angle was measured by three separate observers, both with the shoulder extended and at a neutral angle. Shoulder abduction was then measured, using craniocaudal fluoroscopic images. Arthroscopy was performed in all shoulder joints, with the medial support structures transected in one shoulder of each dog. The three observers again measured shoulder abduction angles in all dogs. Shoulder abduction was measured again using fluoroscopy. Accuracy and repeatability of the abduction test were assessed using linear mixed models.
RESULTS: All three observers had different measured abduction angles when compared with fluoroscopy ( < 0.01); however, the experienced surgeon had an error of only 2.9°. Inter-observer repeatability was poor, with all three observers having different abduction measurements ( < 0.001). Intra-observer repeatability, however, indicated no differences on repeated measurements ( = 0.26). Placing the shoulder at a neutral standing angle, and transection of support structures caused an average increase in abduction by 8.2° ( < 0.001) and 4.4° respectively.
CONCLUSION: Significant variation exists between observers performing this test, increased accuracy seen in the more experienced observer. Shoulder flexion angle can significantly affect measured abduction angles.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Small Animals
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Language:English
Date:21 June 2019
Deposited On:11 Jul 2019 11:44
Last Modified:11 Jul 2019 11:44
Publisher:Schattauer
ISSN:0932-0814
Additional Information:Dieser Artikel ist nicht genau identisch mit dem Original, das in Veterinary and comparative orthopaedics and traumatology veröffentlicht wurde. Die überarbeitete und veröffentlichte Version von Vet Comp Orthop Traumatol. 2019 Jun 21. doi: 10.1055/s-0039-1692410. [Epub ahead of print] Measurement of Shoulder Abduction Angles in Dogs: An Ex Vivo Study of Accuracy and Repeatability. Jones SC, Howard J, Bertran J, Johnson B, Pozzi A, Litsky AS, Wittum TE, Kieves N. ist online unter https://www.thieme-connect.com/products/ejournals/html/10.1055/s-0039-1692410erhältlich.
OA Status:Closed
Publisher DOI:https://doi.org/10.1055/s-0039-1692410
PubMed ID:31226723

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Embargo till: 2020-06-21