What is a renal ultrasound?

Kidney ultrasound. It shows the shape of the kidneys but not the function. They may look normal but not work well. If normal however it makes stones, blockages (obstruction), and cancers/masses much less likely.

Related Questions

What exactly is a renal ultrasound study?

Radiology test. A renal ultrasound is a diagnostic radiology test performed by an ultrasonographer or radiologist. It uses sound waves at various frequencies to create pictures of internal organs and other parts of the body. The benefit of ultrasound is it is non-invasive and does not expose the patient to radiation. Read more...
Using sound waves . Renal us uses sound waves to pass through the tissues to make black and white images of the kidney tissue and urinary bladder. It is painless and uses no dye. It takes about 20 minutes to perform and is interpretted by a licsenced doctor called a radiologist. Read more...

Could you tell me what happens in a renal ultrasound?

Typically. The kidneys are evaluated with regard to size, appearance, and presence/absence of hydronephrosis. Stones are looked for. The artery and vein to each kidney are often shown by color doppler. Lastly, images of the bladder are provided. As with any imaging procedure, the exam is best guided by information about suspected disease from the ordering clinician. Read more...

What exactly are the renal ultrasound limitations in the evaluation of urinary tract?

Not pyelonephritis. Renal ultrasound can not detect pyelonephritis unless there is appreciable swelling of part or all of the kidney. It is excellent for demonstrating kidney cysts, hydronephrosis or kidney obstruction. Will demonstrate large and obstructing kidney stones but can and will miss small kidney stones smaller especially smaller than 3mm. Read more...
Many. Ultrasound can only "see" changes to kidneys that alter the appearance of the kidneys themselves. It cannot see laboratory abnormalities. It can see altered blood flow. It can see when the kidneys are blocked (hydronephrosis), among other disorders. As with any radiology modality, ultrasound is used in conjunction with other lab tests and your doctor's expertise. Read more...

What exactly is renal stenosis ultrasound?

Ultrasound of vessel. Renal artery stenosis is a disease that is caused by tightness of the renal arteries feeding the kidneys which causes elevated blood pressure and if severe shrinking of the kidney sizes. This is diagnosed by a few tests amongst which is the ultrasound of the blood vessel to evaluate the speed of blood flow which if spurting fast means stenosis. This is different than routine kidney ultrasound. Read more...
Kidney Artery eval. Ultrasound can evaluate the renal (kidney) arteries and attempt to identify stenoses, narrowings, which may contribute to kidney failure or high blood pressure. Read more...
Renal artery Doppler. Renal artery stenosis can be evaluated with doppler ultrasound. The renal arteries are imaged with color doppler for localization and then pulse doppler measurements for blood velocity are made. Artery stenosis can manifest as increased or decreased velocity depending on severity of stenosis. Graphic display of blood velocity are useful for demonstrating flow patterns. Read more...
Renal ultrasound. Renal artery ultrasound is called "renal duplex" which originally combined B-mode ultrasound to image the renal arteries with a pulsed Doppler to sample the velocity of blood flow in the artery. Now color Doppler and other extras are available. If renal velocity>200cm/sec artery likely abnormal. If RAR (ratio of renal velocity over aortic velocity) >3.5 likely 60% stenosis present. Accuracy good. Read more...