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QUESTION: In patients with suspected pulmonary embolism (PE) who are in the emergency department, can a normal alveolar dead space fraction (ADF) assessment and a negative whole blood agglutination d-dimer assay exclude PE?
Blinded comparison of test results for ADF and d-dimer assay with radionuclide lung scanning (V/Q scan), contrast enhanced computer tomography, and 6 month follow up plus selective use of venous ultrasonography and pulmonary angiography.
6 urban teaching hospitals in the US.
380 patients (mean age 50 y, 70% women) with suspected PE. Inclusion criteria were age >18 years and not being transferred from another facility. Exclusion criteria were signs of circulatory shock, inability to breathe room air and maintain pulse oximetry reading of < 90%, or failure to cooperate …
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