An Analysis of the Rotator Interval in Patients With Anterior, Posterior, and Multidirectional Shoulder Instability

2008 ◽  
Vol 24 (8) ◽  
pp. 921-929 ◽  
Author(s):  
Matthew T. Provencher ◽  
Christopher B. Dewing ◽  
S. Josh Bell ◽  
Frank McCormick ◽  
Daniel J. Solomon ◽  
...  
2010 ◽  
Vol 51 (3) ◽  
pp. 302-308 ◽  
Author(s):  
Yi-Chih Hsu ◽  
Ru-Yu Pan ◽  
Yen-Yu I. Shih ◽  
Meei-Shyuan Lee ◽  
Guo-Shu Huang

Background: Redundancy of the capsule has been considered to be the main pathologic condition responsible for atraumatic posteroinferior multidirectional shoulder instability; however, there is a paucity of measurements providing quantitative diagnosis. Purpose: To determine the significance of superior-capsular elongation and its relevance to atraumatic posteroinferior multidirectional shoulder instability at magnetic resonance (MR) arthrography. Material and Methods: MR arthrography was performed in 21 patients with atraumatic posteroinferior multidirectional shoulder instability and 21 patients without shoulder instability. One observer made the measurements in duplicate and was blinded to the two groups. The superior-capsular measurements (linear distance and cross-sectional area) under the supraspinatus tendon, and the rotator interval were determined on MR arthrography and evaluated for each of the two groups. Results: For the superior-capsular measurements, the linear distance under the supraspinatus tendon was significantly longer in patients with atraumatic posteroinferior multidirectional shoulder instability than in control subjects ( P<0.001). The cross-sectional area under the supraspinatus tendon, and the rotator interval were significantly increased in patients with atraumatic posteroinferior multidirectional shoulder instability compared to control subjects ( P<0.001 and P=0.01, respectively). Linear distance greater than 1.6 mm under the supraspinatus tendon had a specificity of 95% and a sensitivity of 90% for diagnosing atraumatic posteroinferior multidirectional shoulder instability. Cross-sectional area under the supraspinatus tendon greater than 0.3 cm2, or an area under the rotator interval greater than 1.4 cm2 had a specificity of more than 80% and a sensitivity of 90%. Conclusion: The superior-capsular elongation as well as its diagnostic criteria of measurements by MR arthrography revealed in the present study could serve as references for diagnosing atraumatic posteroinferior shoulder instability and offer insight into the spectrum of imaging findings corresponding to the pathologies encountered at clinical presentation.


2017 ◽  
Vol 11 (1) ◽  
pp. 989-1000 ◽  
Author(s):  
Santos Moros Marco ◽  
José Luis Ávila Lafuente ◽  
Miguel Angel Ruiz Ibán ◽  
Jorge Diaz Heredia

Background:The glenohumeral joint is a ball-and-socket joint that is inherently unstable and thus, susceptible to dislocation. The traditional and most common anatomic finding is the Bankart lesion (anterior-inferior capsule labral complex avulsion), but there is a wide variety of anatomic alterations that can cause shoulder instability or may be present as a concomitant injury or in combination, including bone loss (glenoid or humeral head), complex capsule-labral tears, rotator cuff tears, Kim´s lesions (injuries to the posterior-inferior labrum) and rotator interval pathology.Methods:A review of articles related to shoulder anatomy and soft tissue procedures that are performed during shoulder instability arthroscopic management was conducted by querying the Pubmed database and conclusions and controversies regarding this injury were exposed.Results:Due to the complex anatomy of the shoulder and the large range of movement of this joint, a wide variety of anatomic injuries and conditions can lead to shoulder instability, specially present in young population. Recognizing and treating all of them including Bankart repair, capsule-labral plicatures, SLAP repair, circumferential approach to pan-labral lesions, rotator interval closure, rotator cuff injuries and HAGL lesion repair is crucial to achieve the goal of a stable, full range of movement and not painful joint.Conclusion:Physicians must be familiarized with all the lesions involved in shoulder instability, and should be able to recognize and subsequently treat them to achieve the goal of a stable non-painful shoulder. Unrecognized or not treated lesions may result in recurrence of instability episodes and pain while overuse of some of the techniques previously described can lead to stiffness, thus the importance of an accurate diagnosis and treatment when facing a shoulder instability.


2017 ◽  
Vol 33 (10) ◽  
pp. e62-e63
Author(s):  
Eric C. McCarty ◽  
Matthew J. Kraeutler ◽  
Nicholas Aberle ◽  
John B. Schrock ◽  
Colin C. Brown ◽  
...  

2010 ◽  
Vol 19 (7) ◽  
pp. 1056-1062 ◽  
Author(s):  
Ofir Chechik ◽  
Eran Maman ◽  
Oleg Dolkart ◽  
Morsi Khashan ◽  
Lior Shabtai ◽  
...  

2008 ◽  
Vol 36 (6) ◽  
pp. 1123-1131 ◽  
Author(s):  
Timothy S. Mologne ◽  
Kristin Zhao ◽  
Michio Hongo ◽  
Anthony A. Romeo ◽  
Kai-Nan An ◽  
...  

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