What is the HIDA scan?
HIDA (Hepatobiliary Iminodiacetic Acid) scan is a medical imaging test used to evaluate the function of the liver, gallbladder, and bile ducts. The test involves injecting a small amount of radioactive material (tracer) into the bloodstream and using a special camera to take images of the tracer as it moves through the liver and biliary system.
The HIDA scan can help to determine if there is a blockage in the bile ducts or if the gallbladder is functioning properly. It can also be used to detect various conditions such as gallstones, bile duct strictures, inflammation of the gallbladder or bile ducts, and tumors.
During the scan, you will lie on a table and the tracer will be injected into your arm. The images will be taken at regular intervals over the next several hours to track the movement of the tracer through your liver and biliary system. The HIDA scan is a safe and non-invasive test and is usually performed as an outpatient procedure.
Why is the HIDA scan done?
A HIDA (hepatobiliary iminodiacetic acid) scan is a medical imaging test that is used to assess the function of the liver, bile ducts, and gallbladder. The test uses a small amount of radioactive material, known as a tracer, which is injected into a vein in the arm. As the tracer travels through the bloodstream, it concentrates in the liver and is secreted into the bile. The bile then moves through the bile ducts and into the gallbladder, where it is stored. A special camera, known as a gamma camera, is used to take images of the tracer as it moves through the liver, bile ducts, and gallbladder, allowing doctors to see how well these organs are functioning.
HIDA scans are typically ordered when a healthcare provider suspects a problem with the liver, bile ducts, or gallbladder, such as gallstones, bile duct blockages, or infections. The test can help diagnose these conditions and determine the cause of symptoms such as abdominal pain, jaundice, and nausea.
Who should take the HIDA scan?
A HIDA (hepatobiliary iminodiacetic acid) scan may be recommended for individuals who have symptoms that suggest a problem with the liver, bile ducts, or gallbladder. Some of the symptoms that may prompt a healthcare provider to order a HIDA scan include:
- Abdominal pain
- Jaundice (yellowing of the skin and eyes)
- Nausea and vomiting
- Itching
- Dark urine
- Light-colored stools
- Loss of appetite
If a healthcare provider suspects a problem with the liver, bile ducts, or gallbladder, they may order a HIDA scan in conjunction with other tests, such as an ultrasound or CT scan, to help diagnose the condition and determine the cause of symptoms. The decision to perform a HIDA scan will depend on the individual’s specific medical history, symptoms, and overall health. It is important to talk to your healthcare provider about whether a HIDA scan is appropriate for you.
How should I prepare for the HIDA scan?
To prepare for a HIDA (hepatobiliary iminodiacetic acid) scan, you should:
- Fast for 4 to 6 hours before the test
- Inform your healthcare provider about any medications and allergies you have
- Wear comfortable, loose-fitting clothing
- Let your healthcare provider know about any pre-existing medical conditions
- If breastfeeding, temporarily stop before and after the test
- Arrive on time for your appointment.
It is important to follow the instructions provided by your healthcare provider and the imaging center or hospital, and to discuss any questions or concerns with your healthcare provider.
What is the procedure of the HIDA scan?
Here is a brief overview of the procedure for a HIDA (hepatobiliary iminodiacetic acid) scan:
Before:
- Fast for 4 to 6 hours
- Inform healthcare provider of medications and allergies
- Wear comfortable clothing
During:
- A radioactive tracer will be injected into a vein in your arm
- A special camera will take images of the tracer as it moves through your liver, bile ducts, and gallbladder
- The test may take several hours
After:
- No special preparation is typically required after the test
- You may resume your normal activities and diet
- Talk to your healthcare provider about the results of the test.
It is important to follow the instructions provided by your healthcare provider and the imaging center or hospital. If you have any questions or concerns about the test, be sure to discuss them with your healthcare provider.
Is there any risk associated with this scan?
Like all medical procedures, a HIDA (hepatobiliary iminodiacetic acid) scan does carry some risks. However, these risks are generally minor and rare. Some potential risks include:
- Allergic reactions to the radioactive tracer or contrast material
- Nausea and vomiting
- Pain or discomfort where the needle was inserted
- Low levels of radiation exposure.
It is important to discuss the risks and benefits of any medical procedure with your healthcare provider, and to let them know about any allergies or medical conditions you have before undergoing the test.
Who interprets the scan results?
A radiologist, a doctor who specializes in interpreting medical images, will typically interpret the results of a HIDA (hepatobiliary iminodiacetic acid) scan. The radiologist will examine the images taken during the test to assess the flow of bile from the liver and to look for any blockages or abnormalities. The radiologist will provide a report to your healthcare provider, who will then discuss the results with you and explain what they mean. Your healthcare provider may also order additional tests or refer you to a specialist as needed.