Ultra Sound (USG): Renal Doppler

Specimen Required

NONE

Fasting Required

Purpose of the Test

The renal doppler ultrasound (USG) is a non-invasive imaging test that uses sound waves to evaluate the blood flow to the kidneys. This test can help diagnose certain conditions that affect the renal blood vessels, such as renal artery stenosis, renal vein thrombosis, and renal parenchymal disease.

When this test is required

Renal Doppler ultrasound is often requested by doctors if a patient has symptoms such as high blood pressure, reduced kidney function, or blood in the urine. It may also be ordered to evaluate the function of transplanted kidneys or to assess the risk of complications during pregnancy.

What the Test Detects

Renal Doppler ultrasound is a medical imaging test that uses sound waves to produce images of the blood vessels in the kidneys. It specifically measures the velocity and direction of blood flow in the renal arteries and veins, and evaluates any potential blockages or abnormalities in the blood vessels.

Preparation for the Test

There is generally no special preparation needed for a renal doppler USG. However, the patient may be instructed to avoid eating or drinking for a certain period before the test to ensure clear images. It is important to follow any instructions given by the healthcare provider to ensure the most accurate results possible.

Sample Requirements

No special sample is required for a renal doppler USG. The patient will simply lie on a table while a technician applies gel to the abdomen and uses a handheld device called a transducer to create images of the kidneys and their blood vessels.

Additional Notes

During the test, a transducer (a small handheld device) is placed on the skin over the kidney area, and sound waves are transmitted through the body. The echoes from the sound waves are then analyzed by a computer to create images of the blood vessels in the kidney. It is a non-invasive and safe test that does not use radiation, and typically does not require any preparation. However, patients may be asked to avoid eating or drinking for a period of time before the test. It is important to follow any instructions provided by the healthcare provider before the test.

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