What is Renal Scintigraphy (Renal Scan)?
Renal scintigraphy, commonly referred to as a renal scan, is a diagnostic imaging technique used to evaluate the structure and function of the kidneys.
It involves the use of a small amount of radioactive material (radiotracer) injected into a vein, which helps create images of the kidneys through a special camera called a gamma camera.
The radiotracer used in renal scintigraphy is usually technetium-99m, which is chosen for its safety and effectiveness in imaging kidney function.
Side Effects of Renal Scintigraphy (Renal Scan)
Renal scintigraphy is generally considered safe with minimal risk of side effects. The amount of radiation exposure from the radiotracer is low and comparable to other diagnostic imaging procedures using radioactive materials. Most patients experience no adverse effects from the procedure. However, some potential considerations include:
- Allergic Reaction: Although rare, some patients may experience an allergic reaction to the radiotracer. It's essential to inform your healthcare provider about any allergies or previous adverse reactions to medications.
- Radiation Exposure The amount of radiation used in renal scintigraphy is minimal and generally considered safe. Pregnant women and breastfeeding mothers should inform their healthcare provider before undergoing the scan to assess any potential risks to the fetus or infant.
How is Renal Scintigraphy (Renal Scan) Diagnosed?
The procedure typically involves the following steps:
- Injection of Radiotracer: A small amount of technetium-99m radiotracer is injected into a vein, usually in the arm.
- Waiting Period: There is a waiting period after the injection to allow the radiotracer to circulate and be filtered by the kidneys.
- Imaging: You will be positioned under a gamma camera, which detects the radioactive emissions from the radiotracer and creates images of the kidneys.
- Multiple Images: Images may be taken at different time points to assess blood flow, function, and drainage of the kidneys.
- Duration: The procedure typically lasts from 30 minutes to 1 hour, depending on the specific protocol and the information needed.
Potential Uses of Renal Scintigraphy (Renal Scan)
Renal scintigraphy provides valuable information about various aspects of kidney function and structure, including:
- Glomerular Filtration Rate (GFR): It helps assess how well the kidneys are filtering blood.
- Renal Blood Flow: Evaluates blood flow to the kidneys, which is crucial for kidney function.
- Renal Function: Determines overall kidney function and identifies any abnormalities such as obstruction or damage.
- Hydronephrosis: Detects and evaluates the severity of hydronephrosis, a condition where the kidneys become swollen due to urine build-up.
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