Color duplex Doppler ultrasonography of the renal arteries
Color Doppler duplex ultrasound of the renal arteries is a modern, non-invasive and painless imaging method that uses ultrasound to evaluate blood flow in the arteries supplying the kidneys. It is an essential investigation in the diagnosis of renal diseases of vascular origin, such as renal artery stenosis.
Anatomical components and description:
Renal arteries – the main vessels that transport oxygenated blood from the aorta to each kidney. Each kidney usually has one renal artery, but additional arteries may also be present.
Kidneys – vital organs that filter the blood, eliminate toxins, and regulate blood pressure.
Abdominal aorta – the main artery from which the renal arteries branch.
Role
Evaluation of blood flow velocity and direction.
Identification of narrowings (stenoses) or obstructions.
Monitoring patients with secondary arterial hypertension caused by renal vascular conditions.
Prevention of the progression of chronic kidney disease through early interventions.
Indications
- Arterial hypertension resistant to treatment.
- Hypertension at a young age or in children.
- Suspicion of renal artery stenosis (e.g., in patients with dyslipidemia or diabetes).
- Congenital or post-surgical solitary kidney.
- Renal failure of unclear cause.
- Abnormally sized kidneys.
The purpose of this preparation is to reduce intestinal gases, which may interfere with visualization of deep vessels.
Procedure
The patient is positioned on their back. The physician applies a gel to the abdomen and uses an ultrasound probe to visualize the renal arteries. Vessel morphology, direction, and velocity of blood flow are evaluated. The procedure lasts approximately 30–45 minutes and does not cause pain.
Renal artery Doppler ultrasound is a safe and repeatable investigation and is essential for evaluating renal blood circulation. It is indicated in uncontrolled hypertension or renal diseases of vascular origin and significantly contributes to establishing correct treatment.
Pregătirea:
- Avoid for 3 days: carbonated beverages, raw fruits and vegetables, concentrated sweets.
- Do not consume food 5–6 hours before the examination.
- Take activated charcoal and digestive enzymes for 3–4 days prior to the examination.
- Engage in light physical activity daily (at least 1 hour of walking).
