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THE VALUE OF CT SCAN IN ACUTE APPENDICI | ||
| AL-TAQANI | ||
| Article 1, Volume 22, Issue 4, 2009, Pages 163-171 | ||
| Author | ||
| May Khalid Ameen | ||
| Abstract | ||
| To determine the accuracy of nonenhanced nonfocused (abdomino-pelvic ) computed tomography (CT) in the diagnosis of clinically equivocal cases of acute appendicitis, a prospective study was performed of 95 patients with clinically equivocal signs of acute appendicitis who were referred from the department of surgery . The study was performed using thin section nonenhanced helical CT of the abdomin-opelvic region. All the scans were obtained in a single breath-hold using 5 mm beam collimation and a pitch of 1.6. Criteria for diagnosing acute appendicitis included an enlarged appendix ( > 6 mm) and periappendiceal inflammation. Final diagnoses were established based on the results of surgical or clinical follow up, or both. There were 33 true positive diagnoses, 53 true negative diagnoses (18 of which had an alternative diagnosis established at CT ), 4 false positive, and 5 false negative diagnoses, yielding a sensitivity of 87 % , a specificity of 93 %, a positive predictive value (PPV) of 89 %, a negative predictive value (NPP) of 91%, and an accuracy of 91 %. We conclude that nonenhanced , nonfocused (abdomin-opelvic) helical CT is a highly accurate technique for diagnosis or exclusion of acute appendicitis. | ||
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