The Profunda Popliteal Collateral Index (PPCI) can help determine the severity of peripheral vascular disease in the lower leg and predict the likelihood of success for a profundoplasty.
(1) above the knee systolic blood pressure in mm Hg
(2) below the knee systolic blood pressure in mm Hg
= ((above the knee systolic blood pressure) - (below the knee systolic blood pressure)) / (above the knee systolic blood pressure)
• Ideally there should be little arterial resistance over the distances involved, and the PPCI should be close to 0.
• In the presence of occlusion in the superficial femoral artery, a low PPCI is associated with good collateral circulation through the profunda femoral artery to supply areas beyond an occlusion.
• With severe atherosclerosis there may be significant resistance and poor collateral circulation, with a much lower systolic blood pressure below the knee.
• A PPCI > 0.5 indicates severe vascular disease and is associated with profundoplasty failure.
• Boren et al found that patients with successful profundaplasties had a mean PPCI of 0.18.
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Purpose: To calculate the profunda popliteal collateral index (PPCI) for a patient with possible peripheral artery disease involving a lower extremity.
Specialty: Cardiology, Emergency Medicine, Pulmonology
Objective: severity, prognosis, stage
ICD-10: G63.5, I70, I71, I72, I73, M35.9,