title: Accuracy of duplex scanning in the prediction of pressure gradients across peripheral artery stenoses.
abstract: The present study investigates the validity and accuracy of the modified Bernoulli equation in the Doppler-derived evaluation of pressure drops across peripheral artery stenoses. Conventional duplex-derived (x) and catheter-measured (y) mean and peak pressure gradients across iliac artery stenoses were determined in 35 iliac arteries of 28 patients. The correlations between both methods were r = 0.84 (n = 35; SEE = 4; y = 0.89x + 2) for the mean and r = 0.86 (n = 27; SEE = 10; y = 0.76x + 11) for the peak pressure gradients. In a second study, color-coded duplex-derived (x) and catheter-measured (y) pressure gradients across iliac artery stenoses were determined in 28 further patients. The correlations were 0.86 (n = 28; SEE = 5; y = 0.98x + 0.5) for the mean and r = 0.83 (n = 18; SEE = 15; y = 0.83x + 4) for the peak pressure gradients. These data show that the modified Bernoulli equation can be applied to predict pressure gradients across iliac artery stenoses in patients with peripheral artery diseases.
authors.affiliation: Abteilungen für Innere Medizin, Aggertalklinik, Engelskirchen.
authors.forename: A L
authors.initials: AL
authors.lastname: Strauss
authors.forename: T
authors.initials: T
authors.lastname: Karasch
authors.forename: F J
authors.initials: FJ
authors.lastname: Roth
mesh_terms: D000328:Adult; D000368:Aged; D000800:Angioplasty, Balloon; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000628:therapy; D001794:Blood Pressure / Q000502:physiology*; D005260:Female; D006801:Humans; D007083:Iliac Artery / Q000000981:diagnostic imaging*; D007511:Ischemia / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy; D007866:Leg / Q000098:blood supply; D008297:Male; D008875:Middle Aged; D014463:Ultrasonography