[Contribution of duplex sonography to prediction of pressure drop across iliac artery stenoses].

The present study investigates the validity and accuracy of the simplified Bernoulli equation in the duplex-derived determination of pressure gradients across iliac artery stenoses. Twenty eight patients presenting with iliac artery stenoses could be examined by both duplex and intraarterial catheter pressure measurements. The correlations between mean and maximal-instantaneous pressure gradients assessed by both methods were r = .77 and r = .79, respectively. Duplex scan can be used to predict pressure gradients in patients with iliac artery stenoses.