What are the intermediate-probability criteria for V/Q scanning diagnosis of pulmonary embolism (PE)?

Updated: Sep 18, 2020
  • Author: Daniel R Ouellette, MD, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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The intermediate-probability criteria are as follows:

One moderate to fewer than two large segmental perfusion defects without corresponding ventilation or chest radiographic abnormalities

Corresponding V/Q defects and radiographic parenchymal opacity in lower lung zone

Single moderate matched V/Q defects with normal chest radiographic findings

Corresponding V/Q and chest radiography small pleural effusion

Difficult to categorize as normal, low, or high probability

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