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Clinical Orthopaedics and Related Research®

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01-06-2010 | Symposium: Current Concepts in Rotator Cuff Disease and Treatment

Isokinetic Muscle Performance Test Can Predict the Status of Rotator Cuff Muscle

Authors: Joo Han Oh, MD, PhD, Jong Pil Yoon, MD, Jae Yoon Kim, MD, Chung Hee Oh, MD

Published in: Clinical Orthopaedics and Related Research® | Issue 6/2010

Abstract

Background

The isokinetic muscle performance test (IMPT) is a validated and objective method used to evaluate muscle function but it is unknown whether it correlates with severity of rotator cuff tears.

Questions/purposes

We asked whether peak torque and total work deficit on the IMPT correlated with the preoperative manual muscle test (MMT), tear size, fatty degeneration (FD) of cuff, and postoperative cuff integrity in patients after rotator cuff surgery.

Methods

We evaluated 221 patients who had undergone rotator cuff repair; of these 86 had the IMPT and a CT arthrogram (CTA) 1 year after surgery.

Results

We found a correlation (r = 0.125~0.464) between the preoperative IMPT and MMT. The IMPT deficit was greater in rotator cuff muscles with larger tears and greater degree of FD. Preoperative external and internal rotation deficits on the IMPT were related to the risk of cuff detachment on the postoperative CTA (r = 0.290, 0.319), and the postoperative abduction deficit was greater than 40% of the contralateral side indicating cuff detachment.

Conclusions

The IMPT provides objective and quantitative data for estimating the preoperative status of rotator cuff tear and can provide baseline data for postoperative anatomic assessment in patients with rotator cuff disorders.

Level of Evidence

Level II, prognostic study. See the Guidelines for Authors for a complete description of levels of evidence.

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Title: Isokinetic Muscle Performance Test Can Predict the Status of Rotator Cuff Muscle
Authors: Joo Han Oh, MD, PhD
Jong Pil Yoon, MD
Jae Yoon Kim, MD
Chung Hee Oh, MD
Publication date: 01-06-2010
Publisher: Springer-Verlag
Published in: Clinical Orthopaedics and Related Research® / Issue 6/2010
Print ISSN: 0009-921X
Electronic ISSN: 1528-1132
DOI: https://doi.org/10.1007/s11999-009-1169-z

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Isokinetic Muscle Performance Test Can Predict the Status of Rotator Cuff Muscle

Abstract

Background

Questions/purposes

Methods

Results

Conclusions

Level of Evidence

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