Friday, March 2, 2001
Fifty consecutive patients who underwent both a high-resolution ultrasound exam and subsequent shoulder arthroscopy were retrospectively reviewed. There were 33 previous rotator cuff repairs using suture anchors, 16 previous subacromial decompressions and one instability repair.
Ultrasounds were performed by one of two radiologists and a single surgeon performed all arthroscopic evaluations. Findings were then correlated. Ultrasound correctly diagnosed 44 of 50 patients. At surgery there were 24 full-thickness rotator cuff tears (FTRCT) and 26 intact rotator cuffs were identified. Ultrasound correctly identified 22 of 24 patients with FTRCT (true positive). Of the 26 patients with intact rotator cuffs, 22 were correctly identified by ultrasound (true negative) and four were read as FTRCT (false positive). Two patients with a FTRCT was read as having an intact cuff (false negative).
The study found sensitivity and specificity of ultrasound for rotator cuff integrity in the postoperative shoulder was 92 percent and 85 percent, respectively. The total accuracy was 89 percent.
Coauthors of the study are William D. Prickett, MD; Leesa M. Galatz, MD; Ryan Calfee, BS; Sharlene Teefey, MD; William D. Middleton, MD; and Ken Yamaguchi, MD, from the shoulder and elbow service, department of orthopaedic surgery and the Mallinckrodt Institute of Radiology, Barnes-Jewish Hospital, Washington University School of Medicine, St. Louis, Mo.
|2001 Academy News March 2 Index C|
Last modified 15/February/2001 by IS