HLA Class II typing, low resolution (eg, antigen equivalents); one antigen equivalent, each
CPT4 code
Name of the Procedure:
HLA Class II Typing, Low Resolution (e.g., Antigen Equivalents); One Antigen Equivalent, Each
Summary
HLA Class II Typing is a laboratory test used to identify specific proteins (antigens) on the surface of cells that play a critical role in the immune system. This test is performed using low-resolution methods to identify one antigen equivalent at a time.
Purpose
The primary purpose of HLA Class II Typing is to match organ and tissue transplant recipients with compatible donors. It can also be used in diagnosing autoimmune disorders and in managing certain immune-related conditions. The goal is to ensure compatibility and reduce the risk of transplant rejection or to provide valuable information for managing diseases.
Indications
- Pre-transplant assessment for organ and tissue compatibility.
- Diagnosis and management of autoimmune disorders.
- Evaluation of certain genetic predispositions to immune-related conditions.
Preparation
- No special preparation is usually required.
- Patients should inform their healthcare provider about any medications they are taking.
- In some cases, a blood sample may be collected.
Procedure Description
- A blood sample is drawn from the patient.
- The sample is processed in a laboratory.
- Specialized techniques are used to identify HLA Class II antigens at a low resolution.
- The results are analyzed to determine the specific antigens present.
Duration
The blood collection process typically takes about 10-15 minutes. Laboratory processing and analysis can take several hours to a few days.
Setting
The blood collection is performed in a healthcare provider’s office or outpatient clinic. Laboratory analysis is conducted in a specialized laboratory.
Personnel
- Phlebotomist or nurse to collect the blood sample.
- Laboratory technologists and specialists to process and analyze the sample.
Risks and Complications
- Minor risks associated with blood draw, such as bruising or infection at the puncture site.
- Very rare chance of an incorrect result due to lab error.
Benefits
- Helps ensure successful organ and tissue transplants by matching compatible donor and recipient pairs.
- Assists in diagnosing and managing autoimmune and other immune-related conditions.
Recovery
- There is no significant recovery needed from the blood draw.
- Patients can resume normal activities immediately after.
Alternatives
- High-resolution HLA typing for more precise antigen matching.
- Genetic testing and other immunological assessments, depending on the specific condition being evaluated.
Patient Experience
- During the blood draw, patients may feel a brief pinch or mild discomfort.
- After the procedure, the patient might have slight tenderness or bruising at the site, which usually resolves quickly.
- No sedation or anesthesia is required, and patients can return to their regular activities immediately.
The information in this document is intended to provide an overview and should not replace medical advice from a healthcare professional.