Year: 2025
Type: article
Abstract: Author: Dawn Boynton, MBA, RDMS, RVT, RT(R) Objectives: Demonstrate the ultrasound appearance of renal artery stenosis. Show dampened “parvus tardus” pulsed doppler waveforms. Illustrate “twinkle artifact,” or color comet tail artifact as the result of a renal stone. Methods: Ultrasound imaging using B-mode imaging, pulsed wave and color Doppler flow of the renal arteries can detect renal artery stenosis when performed by a skilled sonographer. Renal artery stenosis or occlusive disease results in decreased blood flow to the kidneys. Prompt interventional treatment of proximal renal artery stenosis can be performed using stenting and ballooning to reduce hypertension and restore and preserve renal function. Results: The goal of intervention with angioplasty and stenting is to preserve renal function and improve blood pressure control. With long standing RAS if intraparenchymal resistive index (RI) are > 0.80 irreversible renal damage has occurred therefore stenting may not improve renal function. Conclusions: When performed by a skilled sonographer, ultrasound can demonstrate renal artery stenosis with color and Doppler flow. Flow to a stenotic renal artery can be improved with stenting and ballooning. Ultrasound can also demonstrate renal stones and a comet tail artifact.
Language: English
Subfield: Pulmonary and Respiratory Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W7128589044
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