Evaluation of Inferior Capsular Laxity in Patients with Atraumatic Multidirectional Shoulder Instability with Magnetic Resonance Arthrography
Korean Journal of Radiology
;
: 931-938, 2019.
Article
in English
| WPRIM
| ID: wpr-760271
ABSTRACT
OBJECTIVE:
To compare inferior capsular redundancy by using magnetic resonance arthrography (MRA) images in patients with multidirectional instability (MDI) of the shoulder and control subjects without instability and thereby develop a screening method to identify the presence of shoulder MDI. MATERIALS ANDMETHODS:
The MRA images of patients with MDI of the shoulder (n = 65, 57 men, 8 women; mean age, 24.5 years; age range, 18–42 years) treated over an eight-year period were retrospectively reviewed; a control group (n = 65, 57 men, 8 women; mean age, 27.4 years; age range, 18–45 years) without instability was also selected. The inferior capsular redundancy was measured using a new method we named the glenocapsular (GC) ratio method. MRA images of both groups were randomly mixed together, and two orthopedic surgeon reviewers measured the cross-sectional areas (CSAs) and sagittal capsule-head ratios on oblique sagittal images, as well as the axial capsule-head ratios on axial images and GC ratios on oblique coronal images.RESULTS:
The CSAs and GC ratios were significantly higher in patients than in controls (both, p 1.42 was found to be most suggestive of MDI of the shoulder, owing to its high sensitivity (92.3%) and specificity (89.2%).CONCLUSION:
GC ratio can be easily measured and used to accurately screen for MDI of the shoulder.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Orthopedics
/
Shoulder
/
Arthrography
/
Mass Screening
/
Retrospective Studies
/
Sensitivity and Specificity
/
Methods
Type of study:
Diagnostic study
/
Observational study
/
Screening study
Limits:
Female
/
Humans
/
Male
Language:
English
Journal:
Korean Journal of Radiology
Year:
2019
Type:
Article
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