Duplex Ultrasonography in Assessing Restenosis of Renal Artery Stents

Journal Article · Mon Nov 15 04:00:00 EST 1999 · Cardiovascular and Interventional Radiology

DOI:https://doi.org/10.1007/S002709900435· OSTI ID:21080260

Bakker, Jeannette ^[1]; Beutler, Jaap J ^[2]; Elgersma, Otto E.H. ^[1]; Lange, Eduard E. de ^[3]; Beek, Frederik J. A. ^[1]

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1. Department of Radiology, University Hospital Utrecht, Heidelberglaan 100, 3584 CX Utrecht (Netherlands)
2. Department of Nephrology, University Hospital Utrecht, Heidelberglaan 100, 3584 CX Utrecht (Netherlands)
3. Department of Radiology, University of Virginia Health Sciences Center, Charlottesville, VA 22908 (United States)

Purpose: To determine the accuracy and optimal threshold values of duplex ultrasonography (US) in assessing restenosis of renal artery stents. Methods: Twenty-four consecutive patients with 33 renal arteries that had previously been treated with placement of a Palmaz stent underwent duplex US prior to intraarterial digital subtraction angiography (DSA), which was the reference standard. Diagnostic accuracy of in-stent peak systolic velocity (PSV) and reno-aortic ratio (RAR = PSV renal stent/PSV aorta) in detecting > 50% in-stent restenosis were evaluated by the receiver operating characteristic curve. Sensitivity and specificity were determined using the optimal threshold values, and using published threshold values: RAR > 3.5 and in-stent PSV > 180 cm/sec. Results: Six examinations were technically inadequate. Nine stents had residual or restenosis > 50% at DSA. The two duplex parameters were equally accurate since areas under the curves were similar (0.943). With optimal threshold values of 226 cm/sec for PSV and 2.7 for RAR, sensitivities and specificities were 100% and 90%, and 100% and 84%, respectively. Using the published duplex criteria resulted in sensitivities and specificities of 100% and 74% for PSV, and 50% and 89% for RAR. Conclusion: Duplex US is a sensitive modality for detecting in-stent restenosis if laboratory-specific threshold values are used.

• OSTI ID: 21080260
• Journal Information: Cardiovascular and Interventional Radiology, Journal Name: Cardiovascular and Interventional Radiology Journal Issue: 6 Vol. 22; ISSN 0174-1551; ISSN CAIRDG
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
ACCURACY
AORTA
BIOMEDICAL RADIOGRAPHY
KIDNEYS
PATIENTS
SENSITIVITY
SPECIFICITY
ULTRASONOGRAPHY