Isokinetic strength of the shoulder after repair of a torn rotator cuff.

Walker, Samantha; Couch, W H; Boester, G A; Sprowl, D W

doi:10.2106/00004623-198769070-00012

Cited by 66 publications

(22 citation statements)

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“…This relationship is logical because when compared with larger tears, small tears are easier to repair, have less fatty infiltration, surgical exposure is not as extensive, and adhesions are less likely to occur. On the other hand, some researchers have found no relationship between preoperative tear size and shoulder strength [12,14,25]. Our results demonstrated a negative correlation between postoperative tear type and shoulder strength at the repair side at extension (60°/s, 120°/s and 180°/s) and at internal rotation (120°/s).…”

Section: Discussioncontrasting

confidence: 54%

Correlations of isokinetic measurements with tendon healing following open repair of rotator cuff tears

Demirörs

Çirçi

Akgün

et al. 2009

International Orthopaedics (SICOT)

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The aim of this study was to investigate the correlation of tendon integrity following open cuff repairs with functional and isokinetic strength measurements. Twenty-six shoulders of 25 patients were included in this study. At the final follow-up, 14 repairs (53.8%) were intact and 12 repairs (46.2%) had failed on magnetic resonance imaging (MRI). Mean UCLA score at latest follow-up was 28.5 and mean Constant score was 80.3. Constant scores were found to be significantly low for the failed group. Age was found to be significantly related to failed repair. Fatty infiltration stage in the failed repair group was significantly high, and a strong positive correlation for both groups existed pre and postoperatively. When both groups were compared, the failed group was found to have significantly low measurements at extension and internal rotation. Despite high failure rates, functional results were satisfactory. Increased age and fatty infiltration stage decrease success.

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Section: Discussioncontrasting

confidence: 54%

Correlations of isokinetic measurements with tendon healing following open repair of rotator cuff tears

Demirörs

Çirçi

Akgün

et al. 2009

International Orthopaedics (SICOT)

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“…But it remains unclear whether fatty infiltration also influences muscle strength. Several clinical reports showed satisfactory isokinetic strength of shoulder abduction after surgical repair of the rotator cuff which was 68-104% compared to uninvolved contralateral shoulders 3-65 months after surgery [12,15,18,19,23]. Strength of abduction depends not only on the supraspinatus muscle but also on other muscles effecting abduction such as the deltoid muscle.…”

Section: Discussionmentioning

confidence: 99%

Delayed tendon reattachment does not reverse atrophy and fat accumulation of the supraspinatus — an experimental study in rabbits

Fujio

Uhthoff

Trudel

et al. 2002

Journal Orthopaedic Research

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Muscle atrophy and fat accumulation occur after rotator cuff tearing. Whether these changes are reversible after a successful repair is still unknown. Imaging allows only a semi-quantitative assessment of muscle atrophy and fat deposition. As only experimental studies permit a quantification of both, a unilateral detachment and wrapping in a polyvinylidine fluoride membrane of the supraspinatus was done in 22 rabbits. After 12 weeks, the polyvinylidine fluoride membrane was removed in 10 rabbits and the tendon inserted into a bony trough. The opposite shoulder served as control. All rabbits were killed at 24 weeks. Accumulation of fat on the muscle surface as well as between the muscle fascicles and occasionally in the sarcoplasm was increased in both experimental groups when compared to controls (non-reattached 12.8%, reattached 23.5% vs controls 5.4%; all p < 0.005). The muscle atrophy was significant (non-reattached 9.2 ml, reattached 9.1 ml vs controls 10.7 ml; both p < 0.005). Neither atrophy nor fat accumulation were reversed by surgical reattachment of the supraspinatus tendon. On the contrary, the fat accumulation was higher in the reattached group ( JJ < 0.005). The trauma of reattachment, the delay between detachment and reattachment or an insufficient duration of recovery may have contributed to both, the lack of reversibility of supraspinatus atrophy and fat accumulation.

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“…However, this technique has been criticized for its subjectivity and lack of reliability in the good to normal ranges [1,20,23]. Therefore, the isokinetic muscle performance test (IMPT) of the shoulder has been advocated because muscle strength can be objectively measured [8,9,19,24]. The IMPT reportedly has high accuracy and test-retest reliability in evaluating the shoulder musculature complex [17,18], and provides information regarding patients' actual muscle function and strength [2].…”

Section: Introductionmentioning

confidence: 99%

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

Yoon

Kim

et al. 2010

Clinical Orthopaedics &Amp; Related Research

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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. ResultsWe 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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Isokinetic strength of the shoulder after repair of a torn rotator cuff.

Cited by 66 publications

References 0 publications

Correlations of isokinetic measurements with tendon healing following open repair of rotator cuff tears

Correlations of isokinetic measurements with tendon healing following open repair of rotator cuff tears

Delayed tendon reattachment does not reverse atrophy and fat accumulation of the supraspinatus — an experimental study in rabbits

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

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