Name of the Procedure:

Allergen Specific IgE; Quantitative or Semiquantitative, Recombinant or Purified Component

Summary

This is a blood test that measures the specific immune response to individual allergens. The test identifies the presence and amount of IgE antibodies in the blood, which are produced during an allergic reaction.

Purpose

The test helps diagnose allergic conditions by identifying specific allergens that trigger allergic reactions in an individual. This information is crucial for developing a targeted treatment plan, such as allergen avoidance or immunotherapy.

Indications

• Chronic allergies (e.g., hay fever, asthma, eczema)
• Symptoms like hives, itching, swelling, or respiratory issues
• Unexplained reactions after exposure to certain foods, insect stings, or environmental factors

Preparation

No special preparation is usually needed. Patients should inform the healthcare provider about all medications they are taking, as some drugs may affect test results.

Procedure Description

1. A blood sample is drawn from a vein in the patient's arm.
2. The sample is sent to a laboratory where it is tested for specific IgE antibodies against various allergens.
3. The test may use recombinant or purified allergen components to provide detailed information about allergen sensitivity.

Duration

The blood draw takes about 5-10 minutes. Laboratory analysis can take a few days to a week.

Setting

The procedure is performed in healthcare settings such as hospitals, outpatient clinics, or diagnostic laboratories.

Personnel

• Phlebotomist or nurse to draw the blood sample
• Laboratory technicians to conduct the analysis
• Allergist or primary care physician to interpret the results

Risks and Complications

• Minor discomfort or bruising at the blood draw site
• Rarely, fainting or dizziness
• Severe allergic reactions are extremely rare in this context

Benefits

• Accurate identification of specific allergens causing reactions
• Improved allergy management and targeted treatment plans
• Reduced frequency and severity of allergic reactions with appropriate intervention

Recovery

• No recovery time required
• Patients can resume normal activities immediately after the blood draw

Alternatives

• Skin prick tests: involve exposing the skin to small amounts of allergens
• Provocation tests: controlled exposure to suspected allergens under medical supervision
• Pros and cons: Skin prick tests provide immediate results but may be less specific; provocation tests are more accurate but riskier.

Patient Experience

Patients might feel a slight pinch when the needle is inserted for the blood draw. Most experience minimal discomfort. Post-procedure, there may be mild soreness or bruising at the puncture site. Pain management typically isn't necessary, but comfort measures like applying a cold pack can help reduce bruising.