A. Ruebben et al., Diagnosis and visualization of renal artery stenosis with color-coded duplex sonography comparison between central and peripheral flow patterns., ROFO-F RONT, 171(4), 1999, pp. 319-323
Citations number
15
Categorie Soggetti
Radiology ,Nuclear Medicine & Imaging
Journal title
ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN
Purpose: Comparison between central and peripheral flow patterns with color
-coded duplex sonography in the diagnosis of renal artery stenosis. Materia
ls and methods: In a prospective study with sixty-six patients systolic vel
ocity (central examination) and acceleration index (peripheral examination)
were determined using color-coded duplex sonography examination in order t
o detect and visualize renal artery stenosis. If the central and peripheral
measurements were negative, no angiography was performed. in contrast, if
one of the methods yielded a pathological finding, catheter angiography was
performed to verify the results (21 patients), as well as in two other unc
lear cases. Results: An agreement between central and peripheral measuring
was seen in 49 of 66 patients. In ten patients central and peripheral measu
rements showed different results. In seven cases the peripheral measurement
s were not clear. Compared to angiography, peripheral measurement showed a
sensitivity of 60 %, a specificity of 75% and a positive predictive Value o
f 81.8%. In contrast, central examination had a sensitivity of 100 %, a spe
cificity of 75% and a positive predictive value of 88.2%. Conclusions: Base
d on our preliminary results, the measurement of the systolic velocity peak
seems to be an effective method to detect renal artery stenosis.