Subjects should be tested on an empty stomach or for more than two hours, and take 1 urea [1?C] capsule with about 20ml of cold drinking water.

Wait for about 15 minutes (without strenuous exercise).

Open the packaging of the gas collecting card and the blowing nozzle, and take out the gas collecting card and the blowing nozzle in turn. Insert the air blowing nozzle into the front end of the air collecting card in the direction of the arrow.

The subject’s mouth includes the front end of the blowing nozzle and blows into the card. The blow should be steady and try to blow in the lungs. The breath can be exchanged during the blowing, but it is strictly forbidden to breathe back! Blow (about 1-3 minutes), stop blowing when the indicator in the indicator window of the gas gathering card turns from orange to yellow. If the color is not completely changed for more than three minutes, you can also stop blowing. At this time, the gas gathering card has absorbed Saturation does not affect the test results.

Give the gas collection card to the medical staff and wait for the test result.