PISAPED criteria for diagnosis of pulmonary embolus

Last revised by Daniel J Bell on 28 May 2021

Citation, DOI, disclosures and article data

Citation:

Deng F, Bell D, PISAPED criteria for diagnosis of pulmonary embolus. Reference article, Radiopaedia.org (Accessed on 20 Apr 2024) https://doi.org/10.53347/rID-71359

DOI:

https://doi.org/10.53347/rID-71359

Permalink:

https://radiopaedia.org/articles/71359

rID:

71359

Article created:

1 Oct 2019, Francis Deng ◉

Disclosures:

At the time the article was created Francis Deng had no recorded disclosures.

View Francis Deng's current disclosures

Last revised:

28 May 2021, Daniel J Bell ◉

Disclosures:

At the time the article was last revised Daniel J Bell had no recorded disclosures.

View Daniel J Bell's current disclosures

Revisions:

3 times, by 2 contributors - see full revision history and disclosures

Systems:

Vascular, Chest

Sections:

Classifications

Synonyms:

PISA-PED criteria (perfusion scintigraphy)
PISAPED criteria (Q scan)
Prospective Investigative Study of Acute Pulmonary Embolism Diagnosis (PISAPED) criteria

The PISAPED criteria for the diagnosis of pulmonary embolus indicate the presence or absence of pulmonary emboli based on findings on perfusion scintigraphy (only the Q portion of the V/Q scan) in combination with chest radiography. The criteria were validated in the Prospective Investigative Study of Acute Pulmonary Embolism Diagnosis, abbreviated to PISAPED ¹. Compared to perfusion-only modified PIOPED II interpretation criteria, PISAPED is simpler, eliminates non-diagnostic readings, and may have higher interobserver agreement ².

Criteria

Pulmonary embolism present

one or more wedge-shaped perfusion defects

Pulmonary embolism absent

no perfusion defects of any kind
perfusion defects other than wedge-shaped
perfusion defects smaller or equal in size and shape to the following radiographic abnormalities:
- cardiomegaly
- enlarged aorta, hila, or mediastinum
- elevated diaphragm
- blunting of the costophrenic angle
- pleural thickening
- intrafissural fluid collection