Helicobacter Test (13c-Urea)

The 13C‑Urea Breath Test is employed primarily to identify active infection with Helicobacter pylori, a bacterium linked to gastritis, peptic ulcer disease, and gastric cancer risk.

• Screening patients with dyspeptic symptoms for H. pylori infection.
• Confirming eradication after antibiotic therapy.
• Assessing infection status before initiating long‑term proton pump inhibitor treatment.
• Supporting epidemiological studies of H. pylori prevalence.
• Guiding clinical decisions in patients with a history of gastric ulcer or MALT lymphoma.

The 13C‑Urea Breath Test is generally well tolerated, but some individuals may experience mild or, rarely, more serious reactions.

Common

• Transient metallic or bitter taste in the mouth.
• Mild nausea or stomach discomfort.
• Increased belching or flatulence after ingestion of the test substrate.

Serious

• Allergic reaction such as rash, itching, or swelling.
• Severe abdominal pain or cramping.
• Respiratory difficulty or wheezing indicative of an anaphylactic response.

When using the 13C‑Urea Breath Test, certain precautions should be observed to ensure accurate results and patient safety.

• Patients should fast for at least 2 hours before the test unless instructed otherwise.
• Recent use of antibiotics, bismuth compounds, or proton pump inhibitors may affect test accuracy; a washout period is often recommended.
• Individuals with known urea metabolism disorders should discuss the test with a healthcare professional.
• Pregnant or lactating women should be evaluated for potential risks before testing.
• Ensure proper collection and handling of breath samples to avoid contamination.

The test substrate can interact with certain medications or substances, potentially influencing the result or causing adverse effects.

Avoid

• Antibiotics (e.g., clarithromycin, amoxicillin) taken within 2–4 weeks prior to testing.
• Proton pump inhibitors or H2‑receptor antagonists used within 1–2 weeks before the test.
• Bismuth‑containing compounds (e.g., Pepto‑Bismol) within the preceding week.

Use with caution

• Recent use of non‑steroidal anti‑inflammatory drugs (NSAIDs) that may cause gastric irritation.
• Herbal supplements affecting gastric pH, such as antacids or proton‑pump‑inhibiting herbs.
• Patients with severe renal or hepatic impairment should be monitored.