Correlation between acromiohumeral distance and rotator cuff tear

Ahmad Husni, Uzir and Nik Abdul Adel, Nik Alyani and Tahir, Siti Hawa (2020) Correlation between acromiohumeral distance and rotator cuff tear. In: 7th International Sports Medicine and Sports Science Conference 2020 (Virtual Edition), 4th-5th November 2020, Kuala Lumpur. (Unpublished)

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Abstract

Introduction : Rotator cuff tear is a common cause of pain affecting the shoulder. In massive rotator cuff tear the humeral head displaces superiorly, therefore causing narrowing of the subacromial space quantified as acromiohumeral distance which be measured from radiographic imaging of the shoulder plain x - ray and MRI. Objective : To determine the mean acromiohumeral distance measurement of rotator cuff tear in local population and to evaluate the correlation between acromiohumeral distance measure from plain x - ray and MRI. Methodology : This is a retrospective study conducted in a single center by reviewing the records of patients with confirmed rotator cuff tear from 2014 - 2018 with ethics approved and consented by patients. Mean value of measured acromiohumeral distance from plain x-ray (anteroposterior and Y scapula view) and MRI were calculated. The presence of rotator cuff tear, muscle atrophy and fatty degeneration were analyzed. Result : 100 patients’ plain X-Ray were recruited with mean age of 52 (±11.4). 59% of them were male. Half of the patient presented with complete tear of supraspinatus tendon, and 42% with partial tear, and another 8% with other type of rotator cuff tear. The mean acromiohumeral distance for complete tear based on x-ray measurement was 6.30mm(±0.96), while the MRI was 6.00mm(±0.88). For partial tear mean measurement for x-ray was 7.20mm(±0.51) and MRI 6.80mm(±0.54). There was positive correlation between the two factors(p=<0.001). Out of 100 patients only 26% associated with muscle atrophy and 7% with fatty degeneration.The acromiohumeral distance does not correlate with muscle atrophy and fatty degeneration (P value 0.100 and 0.317). Conclusion : X-ray and MRI both give significant reading correlation, usage of MRI over x-ray is more superior because it can detect soft tissue injury with lesser radiation. However, in Malaysian setting, x-ray is easily accessible with cheaper cost, hence, makes it a widely used predictive tool in this case. Western study showed that from plain x-ray, distance below 7mm associated with complete tendon tear and 7 to 10mm associated with partial tendon tear. From this study the mean acromiohumeral distance in Malaysian population for complete tear is lower, mainly because our glenohumeral joint is smaller compared to westerner, and the distance has no correlation with muscle atrophy and fatty degeneration.

Item Type:	Conference or Workshop Item (Poster)
Additional Information:	8324/86566
Uncontrolled Keywords:	rotator cuff tear, acromiohumeral distance, impingement syndrome
Subjects:	R Medicine > RD Surgery > RD701 Orthopedics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Medicine Kulliyyah of Medicine > Department of Department of Orthopaedics, Traumatology & Rehabilitation
Depositing User:	Dr Nik Alyani Nik Abdul Adel
Date Deposited:	27 Dec 2020 17:13
Last Modified:	27 Dec 2020 17:13
URI:	http://irep.iium.edu.my/id/eprint/86566

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