Color Duplex Scanning of the Renal Arteries
| Autor: | Marsha M. Neumyer |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Kidney
medicine.medical_specialty business.industry Renal vein thrombosis Secondary hypertension Fibromuscular dysplasia urologic and male genital diseases medicine.disease Renal artery stenosis Renovascular hypertension Duplex scanning medicine.anatomical_structure medicine.artery Internal medicine medicine Cardiology Renal artery business |
| Zdroj: | Noninvasive Vascular Diagnosis ISBN: 9783319547589 |
| Popis: | While the true prevalence of renovascular hypertension is low, its clinical impact is quite significant. It is known to be the most common cause of secondary hypertension and is associated with progressive renal insufficiency and increased risk of cardiovascular events and death. In the majority of adult and pediatric cases, surgical or endovascular revascularization can potentially correct or cure renal artery hypertension, preserve renal mass and function, and prevent development of end-stage renal disease. The key to successful therapy is early detection of renal artery disorders, localization and identification of the disease process, and determination of disease severity. Color duplex scanning has been shown to be a diagnostic tool capable of meeting these goals. Using a combination of B-mode, color and/or power Doppler imaging, and Doppler velocity spectral waveform analysis, it is possible to define the anatomy of the renal arteries and kidneys and the blood flow patterns associated with renal artery atherosclerotic stenosis, occlusion, fibromuscular dysplasia, elevated renovascular resistance, renal vein thrombosis, and progression of renal vascular compromise. B-mode imaging enables determination of renal size and identification of renal artery aneurysms, renal vein thrombosis, and parenchymal or perivascular tumors, masses, cysts, and fluid collections that may cause increased renovascular resistance or extrinsic compression of the renal artery, vein, or kidney. Classification of the severity of renal artery compromise is based on measurement of the renal artery and aortic peak systolic velocities, calculation of a renal-aortic velocity ratio, and recognition of post-stenotic turbulence. Even though color duplex scanning of the renal arteries can be technically challenging, the study has shown excellent sensitivity, specificity, and overall accuracy for identification of renal artery stenosis and definition of hemodynamic significance. For this reason, it is valued as a primary diagnostic tool, a means for defining therapeutic options, and a noninvasive technique for assessment following intervention. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|