Hemoglobin fractionation and quantitation; electrophoresis (eg, A2, S, C, and/or F)
CPT4 code
Name of the Procedure:
Hemoglobin Fractionation and Quantitation; Electrophoresis (e.g., A2, S, C, and/or F)
Summary
Hemoglobin fractionation and quantitation by electrophoresis is a laboratory test that separates and measures different types of hemoglobin in the blood. This test helps identify various hemoglobin disorders by analyzing hemoglobin types like A2, S, C, and F.
Purpose
- Medical Condition: Identifies hemoglobinopathies such as sickle cell disease, thalassemia, and other hemoglobin variants.
- Goals: To diagnose and monitor hemoglobin disorders, guiding treatment decisions.
Indications
- Symptoms such as fatigue, pallor, and jaundice.
- Family history of hemoglobin disorders.
- Unexplained anemia or abnormal red blood cell indices.
- Newborn screening for inherited hemoglobin abnormalities.
Preparation
- Usually, no special preparation like fasting is required.
- Inform the healthcare provider about all medications being taken.
- Occasionally, a prior complete blood count (CBC) might be requested.
Procedure Description
- A small sample of blood is collected from a vein in the arm.
- The sample is processed and applied to a gel or another medium for electrophoresis.
- An electric current is passed through the medium, separating the hemoglobins based on their charge and structure.
- The distinct bands formed by different hemoglobins are then quantified and analyzed.
Tools and Equipment: Blood collection materials, electrophoresis apparatus, and analytical software.
Anesthesia/Sedation: Not applicable.
Duration
The blood collection takes a few minutes. The electrophoresis and analysis process usually takes a few hours to a day.
Setting
The blood draw typically occurs in a hospital, outpatient clinic, or laboratory. The electrophoresis analysis is conducted in a specialized laboratory.
Personnel
- Phlebotomist or nurse for blood collection.
- Medical laboratory technologist for conducting electrophoresis and analysis.
- Pathologist or hematologist to interpret results.
Risks and Complications
- Minimal risk from blood draw, including mild pain, bruising, or infection at the puncture site.
- Rare: Possible need for repeat testing if sample is inadequate or results are inconclusive.
Benefits
- Accurate diagnosis and monitoring of hemoglobin disorders.
- Helps tailor appropriate treatment plans.
- Early detection of potential genetic hemoglobinopathies.
Recovery
- No specific recovery required post blood draw.
- Follow any instructions regarding resumption of usual activities or diet.
- Await further guidance based on test results.
Alternatives
- Genetic testing as a direct method for diagnosing hemoglobinopathies.
- Complete blood count (CBC) with peripheral smear for a broader view of blood cell morphology.
- High-performance liquid chromatography (HPLC) as another method for hemoglobin quantitation.
Pros and Cons: Alternatives like genetic testing can provide definitive diagnoses but may be more expensive. HPLC is highly accurate but less available in some settings.
Patient Experience
- Mild discomfort during blood draw.
- No significant pain or side effects post-procedure.
- Reassurance and comfort measures (e.g., bandage and pressure) applied to the puncture site.