DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION

Y Aref; L Neumann; J Fairbairn

doi:10.1302/0301-620X.85BSUPP_I.0850072

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DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION

Y Aref
L Neumann
J Fairbairn

DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION

Aref Y, Neumann L, Fairbairn J. DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION. Orthop Procs. 2003;85-B(SUPP_I):72-72. doi:10.1302/0301-620X.85BSUPP_I.0850072

Aref, Y, et al. “DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION.” Orthopaedic Proceedings, vol. 85-B, no. SUPP_I, 2003, pp. 72-72., https://doi.org/10.1302/0301-620X.85BSUPP_I.0850072

Aref, Y., Neumann, L., & Fairbairn, J. (2003). DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION. Orthopaedic Proceedings, 85-B(SUPP_I), 72-72. https://doi.org/10.1302/0301-620X.85BSUPP_I.0850072

Aref, Y., Neumann, L. and Fairbairn, J. (2003) “DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION.” Orthopaedic Proceedings, 85-B(SUPP_I), pp. 72-72. Available at: https://doi.org/10.1302/0301-620X.85BSUPP_I.0850072

Aref, Y, L Neumann, and J Fairbairn. “DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION.” Orthopaedic Proceedings 85-B, no. SUPP_I (2003): 72-72. https://doi.org/10.1302/0301-620X.85BSUPP_I.0850072

Aref Y, Neumann L, Fairbairn J. DYNAMIC MUSCLE POWER ASSESSMENT OF THE ROTATOR CUFF MUSCLES BEFORE AND AFTER ARTHROSCOPIC SUBACROMIAL DECOMPRESSION. Orthop Procs. 2003 Jan 1;85-B(SUPP_I):72-72. https://doi.org/10.1302/0301-620X.85BSUPP_I.0850072

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Abstract

Aim: To investigate the effect of Arthroscopic Subacromial Decompression and rehabilitation on rotator cuff muscle strength and function.

Material: 24 patients with primary impingement syndrome and intact rotator cuffs were recruited. 8 further patients were excluded due to pathologies found at arthroscopy.

Methods: All recruited patients prior to surgery underwent: 1- Through clinical examination. 2-Constant Scoring. 3- Detailed Cybex dynamometer testing of the rotator cuff muscles of both shoulders in six different positions with the same range and for power, speed and torque. 4- MRI scans. 5- Full arthroscopic examination followed by a routine arthroscopic SAD. 6-Standard post-op rehab programme.

All tests were repeated at the minimum of 6 (average 6.3) months after the operation.

Results:

CLINICAL

- 23 (95.83%) improved subjectively, and were back to their normal daily routines.
- The average improvement in VAS scoring was an average of 3.5 (2–7))
- Impingement signs disappeared in 23 patients (95.83%)
- Average increase in Constant score was 23 points, from 53.5 to 76.5.Average pain increased from 7.5 to 9, ADL from 5.5 to 6, hand position from 7 to 8, range of motion from 21.5 to 37 & power from 9 to 17. Dynamometer Muscle testing (All measurement of power was done in watts)

A-Abduction power increased from an average of 14.5 to 32.9, Adduction from 17 to 42
b- At maximal adduction internal rotators increased from 25.5 to 34.55, external rotators from 20.25 to 30.85 and
c- At 90° abduction the internal rotators increased from 19.55 to 31.3, and the external rotators from 16.6 to 21.95

Conclusions:

-ASD provides good pain relief
-Most patients return to work before the end of 6 months period; however there seems to be a tendency for further improvement after the 6 months period.
- Muscle power increases post-operative but with individual variation
-Dynamic Power assessment is preferable to the Constant Score method, as power is measured in Watts, and can test below 90° of elevation.
-Power measurement is the only parameter directly related to the clinical outcome of ASD.

The abstracts were prepared by David Stanley. Correspondence should be addressed to him c/o British Orthopaedic Association, Royal College of Surgeons, 35–43 Lincoln’s Inn Fields, London WC2A 3PN.