A new screening method for multidirectional shoulder instability on magnetic resonance arthrography: labro-capsular distance

Abstract

The inferior LC distance can be easily and quickly measured and used as an effective clinical screening method for atraumatic MDI of the shoulder.

MR arthrography evaluation in patients with traumatic anterior shoulder instability

“…It is not obvious, however, that in the presence of the Hill- The inferior labro capsular distance can be easily and quickly measured and used as an effective clinical screening method for multidirectional instability of the shoulder[ 1 0 7 _ T D $ D I F F ] . 16 In the recent years, a more detailed classification of the labrum lesions has been developed, and several variants of these 20 In our case, the incidence of Perthes injuries was 9%, more higher than in the publications of Waldt and Li, who present [ 1 1 9 _ T D $ D I F F ] a similar number of case. However, the Perthes lesion among all was the one that presented the lowest sensitivity (71%), as the theories supported by many authors[ 1 2 0 _ T D $ D I F F ] .…”

Evaluation of Inferior Capsular Laxity in Patients with Atraumatic Multidirectional Shoulder Instability with Magnetic Resonance Arthrography

“…The results indicated that PI capsular areas were greater in the shoulders of MDI patients than in those of controls. Lee et al (11) reported that capsular dimensions in the inferior and PI regions were significantly larger in an MDI group than in controls, and Lim et al (13) reported that inferior capsule lengths were larger in MDI patients than in controls. These findings are consistent with those of the present study.…”

“…However, the CSA values differed, and mean sagittal CSAs in the present study were smaller than those in Dewing's study, which may be due to differences in the sizes of the joint structures in the two studies. In a study by Lim et al (13), it was proposed that a threshold inferior capsule length of 16.88 mm can be used for MDI screening with a sensitivity of 76% and a specificity of 96%. However, this study was undertaken in a Korean cohort, and different results, perhaps larger values in particular, would be expected in Caucasians due to the typically larger skeletons.…”

“…Second, the volumes of joint capsules on MRA images and amounts of contrast medium injected into the glenohumeral joint varied. We injected diluted gadolinium using gentle pressure until injection was no longer possible due to the increased intra-articular pressure, which is believed to provide a reasonable means of assessing individual capsular volumes, but injection pressures were not measured, as was the case in previous studies (11121314). However, all MRA injections were performed by one experienced musculoskeletal radiologist, and that could have reduced the variation in the amount of injected contrast material.…”

“…A small number of reports have compared MDI patients and non-MDI controls by measuring their rotator interval lengths or calculating their glenoid size versus rotator interval length ratios (1112), and few studies have addressed the inferior capsule. Lee et al (11) and Lim et al (13) measured inferior capsule lengths and showed significant differences between them in patients and in controls. However, these studies involved absolute evaluations that did not consider the sizes of the patient joint structures.…”