How accurate are ventilation-perfusion scans for pulmonary embolism?
| Autor: | Howard S.J. Walker, Gary J. Peterson, Peter M. Rumbolo, Stephen Mainini, Bridget F. Caracci |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Adult
medicine.medical_specialty Ventilation/perfusion ratio Sensitivity and Specificity medicine Ventilation-Perfusion Ratio Humans Radionuclide Imaging Lung Aged Retrospective Studies High probability medicine.diagnostic_test business.industry Angiography Anticoagulants General Medicine Middle Aged medicine.disease Pulmonary embolism PULMONARY EMBOLUS Surgery Radiology business Pulmonary Embolism |
| Zdroj: | American journal of surgery. 156(6) |
| ISSN: | 0002-9610 |
| Popis: | To evaluate the accuracy of ventilation-perfusion scanning in the diagnosis of pulmonary embolism, the pulmonary arteriograms of 55 patients suspected of pulmonary embolism were compared with their ventilation-perfusion scans. The clinical presentation was consistent for the diagnosis of pulmonary emboli in all 55 patients. The scans were divided into the following four categories according to standard guidelines: normal, low, intermediate, and high probability. Three patients had normal scans confirmed by arteriography; 34 patients had high-probability scans, but only 22 (65 percent) were positive at arteriography. The remaining 18 patients had low or intermediate-probability scans (9 patients each), 5 of whom (28 percent) were positive at angiography (sensitivity 82 percent, specificity 57 percent). This study demonstrates the inaccuracy of ventilation-perfusion scanning for the evaluation of pulmonary embolus and may represent the variability of interpretation at individual institutions. Perhaps each institution may need to compare the results of ventilation-perfusion scanning and angiography to optimally select and treat patients. |
| Databáze: | OpenAIRE |
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