Analysis of West Point View in Anterior Shoulder Instability.
10.4055/jkoa.2002.37.2.180
- Author:
Jae Myeung CHUN
1
;
Soung Yon KIM
;
Eu Gene KIM
;
Hyun Chul SHON
;
Seong Moon KIM
;
Myeung Jin SHIN
;
Han Jun LEE
Author Information
1. Department of Orthopedic Surgery, Asan Medical Center, Ulsan University College of Medicine, Seoul, Korea. jmchun@www.amc.seoul.kr
- Publication Type:Original Article
- Keywords:
Anterior shoulder instability;
West point view;
Erosion
- MeSH:
Humans;
Incidence;
Ossification, Heterotopic;
Pathology;
Physical Examination;
Sensitivity and Specificity;
Shoulder*
- From:The Journal of the Korean Orthopaedic Association
2002;37(2):180-184
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To evaluate the usefulness of the West point view, we investigated the osseous pathology of the glenoid rim associated with shoulder instability and estimate the inter-observer reliability. MATERIALS AND METHODS: The West point views of sixty-seven patients with labral lesion confirmed by operation were mixed with those of thirty-three normal controls. Six observers independently reviewed the mixed radiographs and checked the lesion by identifying the glenoid erosion, bony defect, ectopic ossification and Hill-Sachs lesion. The incidence of osseous lesions suggesting instability was estimated. Sensitivity in the patient group, specificity in the normal control and inter-observer reliability were calculated to evaluate study susceptibility. RESULTS: The sensitivity of 67 patients group was 81.8% on average (73-94%), the specificity of 33 member control group was 85.2% (82-94%). The most frequent finding was glenoid erosion, with an average of 54.7%, which providing a sensitive clue of shoulder instability. Inter-observer reliability analyzed by using Kappa values showed significant agreement. (alpha=0.1 significant level). CONCLUSION: The West point view is considered to be a reliable diagnostic modality for shoulder instability. The additional sophisticated method is indicated only when a discrepancy between physical examination and radiologic findings exists.
