How long does it take to blow air for a carbon-14 breath test during a physical examination

The carbon-14 breath test generally requires blowing air for 1-3 minutes, and the specific time may vary slightly due to factors such as testing equipment and operating procedures. The carbon-14 breath test determines the presence of helicobacter pylori infection by detecting the concentration of carbon-14 labeled carbon dioxide in exhaled gas. The examinee needs to take carbon-14 labeled urea capsules on an empty stomach, wait for 15-20 minutes, and then start blowing air. The blowing process requires constant and continuous exhalation into the gas collection bag to avoid interruption or rapid breathing that may affect the test results. In most cases, adults need to blow air for 1-2 minutes to complete sample collection, while children or those with poor lung function may need to extend it to 3 minutes. Some new detection devices may be shortened to 30 seconds, but specific guidance from medical staff must be followed. After blowing air, the sample will be sent to the laboratory for analysis, usually reported within 1-3 working days.

Fasting for 4-6 hours is required before examination, and antibiotics, bismuth supplements, and other medications should be discontinued for 2-4 weeks. Pregnant women, lactating women, and those preparing for pregnancy should avoid carbon-14 testing and can choose carbon-13 breath test as an alternative. If the result is positive, it is recommended to undergo further gastroscopy examination or follow medical advice for treatment. Daily attention to serving of individual dishes, avoiding raw food, and regular reexamination can reduce the recurrence rate of Helicobacter pylori.