Infectious agent antigen detection by immunoassay technique, (eg, enzyme immunoassay [EIA], enzyme-linked immunosorbent assay [ELISA], immunochemiluminometric assay [IMCA]) qualitative or semiquantitative, multiple-step method; Helicobacter pylori
CPT4 code
Name of the Procedure:
Infectious agent antigen detection by immunoassay technique, such as enzyme immunoassay (EIA), enzyme-linked immunosorbent assay (ELISA), or immunochemiluminometric assay (IMCA); qualitative or semiquantitative, multiple-step method for Helicobacter pylori.
Summary
In this procedure, a sample from the patient is analyzed in a lab to check for the presence of antigens from Helicobacter pylori, a bacteria that can cause stomach infections. The test uses various immunoassay techniques to detect these antigens, which helps identify an ongoing infection.
Purpose
This procedure is conducted to diagnose infections caused by Helicobacter pylori. The goal is to detect the bacteria early, allowing for appropriate treatment to prevent complications like ulcers and gastritis.
Indications
The procedure is indicated for patients experiencing symptoms like stomach pain, bloating, nausea, or those with a history of peptic ulcers. It is also suggested for patients who have persistent stomach issues or family history of stomach cancer.
Preparation
Patients may need to fast for several hours before the test. Avoiding antacid medications or antibiotics for a week prior is generally recommended to ensure accurate results. No other special tests are needed before this procedure.
Procedure Description
- A sample, usually blood, stool, or breath, is collected from the patient.
- The sample is processed and analyzed using an immunoassay technique.
- In EIA or ELISA, antibodies bind to antigens and produce a color change.
- In IMCA, a chemiluminescent substrate allows for antigen detection through luminescent signals.
A multiple-step method is used for greater accuracy, involving washing and incubation stages.
No anesthesia or sedation is required for this procedure.
Duration
The procedure generally takes a few hours to complete in the lab, but the sample collection from the patient only takes a few minutes.
Setting
Sample collection can take place in a doctor's office, outpatient clinic, or hospital setting. The actual testing is conducted in a specialized laboratory.
Personnel
- Doctors or nurses collect the sample.
- Laboratory technicians and pathologists perform and analyze the immunoassay.
Risks and Complications
The procedure is minimally invasive with very low risk. Rare complications could include minor discomfort at the sample collection site, but these are easily managed.
Benefits
Detecting Helicobacter pylori allows for timely and accurate treatment, which can significantly reduce symptoms and prevent serious complications like ulcers and gastric cancer. Benefits are usually realized shortly after beginning treatment.
Recovery
No special recovery steps are needed post-procedure. Patients can resume normal activities immediately. Follow-up appointments may be scheduled to discuss test results and next steps if H. pylori is detected.
Alternatives
Other diagnostic options include:
- Urea breath test
- Stool antigen test
- Endoscopy with biopsy These alternatives vary in invasiveness and accuracy, with endoscopy being more invasive but offering direct visualization.
Patient Experience
The patient might experience slight discomfort during sample collection but generally feels little to no pain. Discomfort is minimal and temporary. Results are usually discussed within a few days, and appropriate treatment plans are established if an infection is confirmed.