Lint: modified-pioped-ii-criteria-for-diagnosis-of-pulmonary-embolus

"The modified PIOPED II criteria for the diagnosis of pulmonary embolus indicate the presence or absence of pulmonary emboli based on findings on V/Q scan (ventilation-perfusion scintigraphy)."

"This article reflects the modified interpretation criteria promulgated in 2008 ¹ based on recategorised readings from the Prospective Investigation of Pulmonary Embolism Diagnosis II (PIOPED II), a trial in which patients underwent some combination of CT pulmonary angiography, V/Q scanning, and pulmonary digital subtraction angiography ^2,3."

"The modified PIOPED II criteria supersede the revised PIOPED criteria and replace the multiple probabilistic categories with fewer categories of definitive interpretations ⁴, which may be more understandable for referring clinicians."

"The modified PIOPED II criteria supersede the revised PIOPED criteria and replace the multiple probabilistic categories with fewer categories of definitive interpretations ⁴, which may be more understandable for referring clinicians."

"Ventilation/perfusion modified PIOPED II criteria"

"Perfusion-only modified PIOPED II criteria"

"The modified PIOPED II criteria have been adapted for perfusion scintigraphy (i.e. no ventilation scan) ^4,5. In this scheme, the presence of a match or mismatch is determined by comparing the perfusion scan with the chest radiograph rather than a ventilation scan. A perfusion defect without a corresponding radiographic opacity is considered mismatched. In addition, the criterion of multiple matched ventilation and perfusion defects with normal radiograph has been removed from the category of pulmonary embolism absent."

"Perfusion-only interpretation reduces both the specificity and the proportion of nondiagnostic readings compared to ventilation and perfusion using modified PIOPED II criteria ⁵."

"Ventilation/perfusion modified PIOPED II criteria"

"Pulmonary embolism present (high probability)"

"Non-diagnostic (low or intermediate probability)"

"Pulmonary embolism absent (normal or very low probability)"

"Perfusion-only modified PIOPED II criteria"

"Pulmonary embolism present (high probability)"

"Nondiagnostic (low or intermediate probability)"

"Pulmonary embolism absent (normal or very low probability)"