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Relevance between Proximal Humeral Migration and Rotator Cuff Tears
Yichong Zhang1, Jianhai Chen1, Mingtai Ma1
1Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China.
Frontiers in Surgery
|May 23, 2022
Summary
Proximal humeral migration in rotator cuff tears is predicted by the upward migration index (UMI). Larger tear sizes are associated with higher UMI values, indicating increased humeral migration.
Area of Science:
- Orthopedic Surgery
- Radiology
- Biomechanical Analysis
Background:
- Proximal humeral migration is a frequent occurrence in patients diagnosed with rotator cuff tears.
- Understanding the factors contributing to this migration is crucial for effective treatment planning.
Purpose of the Study:
- To investigate the relationship between proximal humeral migration and various factors associated with rotator cuff tears.
- To introduce and validate the upward migration index (UMI) as a quantitative measure.
Main Methods:
- Retrospective analysis of 75 patients with unilateral rotator cuff tears.
- Utilized magnetic resonance imaging (MRI) and X-ray examinations.
- Introduced the upward migration index (UMI) and stratified patients into three groups.
- Employed Pearson correlation, logistic regression, and ROC curve analysis.
Main Results:
- A significant negative correlation was observed between UMI and tear size (R=-0.68, p<0.01).
- UMI also showed negative correlations with visual analogue scale (pain) and fatty degeneration grade.
- Tear size was identified as an independent predictor of UMI, signifying a risk factor for humeral upward migration.
Conclusions:
- The upward migration index (UMI) serves as a reliable predictor of humeral upward migration.
- UMI is closely linked to the tear size of posterosuperior rotator cuff tears.
- A UMI < 1.3 warrants attention for potential large tears; combining clinical assessment with X-ray aids evaluation.
Keywords:
acromion humeral distancepredictorproximal humeral migrationrotator cuff tearupward migration indexMore Related Videos
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