Antibody to human leukocyte antigens (HLA), solid phase assays (eg, microspheres or beads, ELISA, Flow cytometry); high definition qualitative panel for identification of antibody specificities (eg, individual antigen per bead methodology), HLA Class I
CPT4 code
Name of the Procedure:
Antibody to Human Leukocyte Antigens (HLA), Solid Phase Assays (e.g., Microspheres or Beads, ELISA, Flow Cytometry); High Definition Qualitative Panel for Identification of Antibody Specificities (e.g., Individual Antigen per Bead Methodology), HLA Class I. Commonly referred to as HLA Antibody Screening and Identification.
Summary
This procedure is a laboratory test that helps identify specific antibodies against human leukocyte antigens (HLA) present in your blood. It uses advanced techniques like microspheres/beads, ELISA, or flow cytometry to detect these antibodies and provides a detailed analysis of which HLA Class I molecules they target.
Purpose
The primary aim of this test is to detect and identify specific HLA antibodies that might cause complications in organ transplantation or other medical conditions. Understanding these antibodies helps tailor and manage treatment plans, especially for patients awaiting organ transplants, to reduce the risk of organ rejection.
Indications
- Patients awaiting organ transplantation.
- Individuals with a history of repeated organ rejection.
- Conditions like autoimmune diseases where HLA antibodies might be involved.
- Women with a history of multiple miscarriages, as HLA antibodies can be a factor.
Preparation
- No special fasting or dietary restrictions are typically required.
- Inform your healthcare provider about any medications you are taking, as some could interfere with the test.
- Might require initial blood typing and previous antibody screenings for comparison.
Procedure Description
- Blood Sample Collection: A healthcare professional will draw a small amount of blood from your vein.
- Laboratory Analysis:
- Microspheres or Beads: Your blood sample is mixed with tiny beads coated with specific HLA molecules.
- ELISA: Enzymes help detect reactions indicating the presence of antibodies.
- Flow Cytometry: Detects and measures physical and chemical characteristics of the antibodies in your blood.
- High Definition Qualitative Panel: The test identifies which specific HLA Class I molecules your antibodies react against.
Duration
The blood draw itself takes about 5-10 minutes. Laboratory analysis can take a few days to a week, depending on the complexity of the test.
Setting
The blood sample is usually collected in a hospital, outpatient clinic, or specialized lab. The analysis is conducted in a laboratory setting.
Personnel
- Phlebotomist or nurse for drawing blood.
- Laboratory technicians and pathologists specializing in immunology for analysis.
Risks and Complications
- Mild discomfort, bruising, or infection at the blood draw site.
- Rarely, false positives or negatives could occur, requiring follow-up tests.
Benefits
- Accurate identification of specific HLA antibodies.
- Helps in better matching of donor organs, reducing the risk of rejection.
- Informs treatment plans for conditions involving HLA antibodies.
Recovery
- Minimal recovery time from the blood draw; you can resume normal activities immediately.
- Follow any specific instructions given by your healthcare provider based on test results.
Alternatives
- Crossmatch test: A basic test to check compatibility between donor and recipient cells.
- Mixed Lymphocyte Culture (MLC): A test that measures immune response by mixing donor and recipient lymphocytes.
- Pros and Cons: Alternatives might be less specific and provide less detailed information compared to HLA antibody screening.
Patient Experience
- During the blood draw: You might feel a slight pinch or discomfort.
- After the procedure: Minimal to no discomfort, and normal activities can be resumed immediately.
- Pain is typically managed with over-the-counter pain relievers if necessary, though most patients experience little to no pain.