The gas distribution measurement is mainly used to understand the distribution of ventilation. Two days before the examination, all the drugs for bronchodilation should be stopped, such as Shuchuanling, Bangfu, Meipuqing, aminophylline, Shufumei Lehui, Asami, Aichuan, etc., otherwise it will affect test result.

Basic Information

Specialist classification: Respiratory examination classification: pulmonary function test

Applicable gender: whether men and women apply fasting: not fasting

Tips: Two days before the examination, all the drugs for bronchiectasis should be stopped, such as Shuchuanling, Bangfu, Meipuqing, aminophylline, Shufumei Lehui, Asami, Aichuan, etc. Otherwise it will affect the inspection result. Normal value

One breath (nitrogen dilution) method <0.015;

Repeated breathing (nitrogen cleaning) method <0.025.

Clinical significance

Because the abnormal gas distribution can occur in non-obstructive or restrictive ventilation disorders, it is a sensitive indicator of ventilation function.

High results may be diseases: silicosis precautions

Before the examination: Two days before the examination, all the drugs for bronchiectasis should be stopped, such as Shuchuanling, Bangfu, Meipuqing, aminophylline, Shufumei Lehui, Asami, Aichuan, etc. Otherwise it will affect the inspection result.

Inspection process

Inspection method: Obey the doctor and breathe.

Not suitable for the crowd

Unsuitable for the crowd: Check the people who took the bronchodilator before.

Adverse reactions and risks

Generally no complications and harm.