Glutamate dehydrogenase
CPT4 code
Name of the Procedure:
Glutamate Dehydrogenase (GDH) Test
Summary
The Glutamate Dehydrogenase (GDH) test is a laboratory procedure used to measure the levels of the enzyme glutamate dehydrogenase in the blood. This test is often used to diagnose and monitor liver and kidney diseases, as GDH levels can indicate cellular damage or dysfunction in these organs.
Purpose
The primary purpose of the GDH test is to identify and monitor liver or kidney disease. Elevated GDH levels can signify liver cell damage or hepatopathy, while abnormally high levels might indicate issues with the kidneys. The goal is to provide an early diagnosis to manage and treat these conditions effectively.
Indications
- Symptoms of liver disease such as jaundice, abdominal pain, and fatigue.
- Symptoms of kidney disease including unexplained swelling, high blood pressure, and changes in urine output.
- Patients with a history of chronic liver or kidney conditions.
- Individuals undergoing treatment that could potentially harm the liver or kidneys.
Preparation
- Patients are usually required to fast for several hours before the test.
- Inform your doctor about any medications or supplements you are taking, as they may affect the test results.
- No specific diagnostic tests are needed beforehand, but a medical history review and physical examination might be conducted.
Procedure Description
- A healthcare provider will clean the area on your arm where the blood will be drawn.
- A needle is inserted into a vein in your arm to collect a blood sample.
The blood sample is then sent to a laboratory for analysis.
Tools/Equipment:
- Standard blood draw supplies (needle, syringe, alcohol swab, tourniquet)
- Laboratory equipment for enzyme level measurement.
Anesthesia:
- Generally, no anesthesia or sedation is required for a blood draw.
Duration
The blood draw procedure typically takes about 5-10 minutes. Laboratory analysis can take several hours to a few days, depending on the facilities.
Setting
The procedure is performed in healthcare facilities like hospitals, outpatient clinics, or diagnostic laboratories.
Personnel
- Phlebotomist or nurse to draw the blood.
- Lab technicians to analyze the blood sample.
- Physicians to interpret the results and coordinate further care.
Risks and Complications
- Minor risks include bruising, bleeding, or infection at the needle site.
- Rarely, patients might feel lightheaded or faint during the blood draw.
Benefits
- Helps in the early detection and treatment of liver and kidney diseases.
- Aids in monitoring the progression of existing conditions or the effectiveness of treatments.
- Non-invasive and simple procedure with quick recovery.
Recovery
- Minimal recovery time; patients can usually resume normal activities immediately.
- Keep the puncture site clean and watch for signs of infection.
Alternatives
Other blood tests might be used to assess liver and kidney function, including:
- Liver Function Tests (LFTs)
- Blood Urea Nitrogen (BUN)
- Creatinine Test
Each alternative has its own pros and cons and may be used in conjunction with the GDH test for a comprehensive evaluation.
Patient Experience
- During the procedure, you may feel a slight prick when the needle is inserted.
- Some discomfort or bruising might occur at the puncture site post-procedure.
- Pain management typically not needed; over-the-counter pain relief can be used if necessary.