The ventilated storage ratio is a good indicator of ventilated reserve function. Ventilation reserve ratio = (maximum ventilation - resting ventilation) / maximum 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

>0.93.

Clinical significance

<0.86 is insufficient for ventilation. It is commonly used for pulmonary function assessment before chest surgery and labor identification for occupational patients.

Low results may be diseases: respiratory failure, silicosis, emphysema, atelectasis, chronic respiratory failure

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.

Inspection process

During the measurement, the subject takes a sitting position, clips the nose clip, and contains a mouthpiece, which is connected with the pulmonary function meter. 嘱 Patients do the maximum inspiration to the TLC position and hold the breath for 1 s. Quickly make the best effort to exhale to reach the residual gas position, measure FVC and FEV1.0, and calculate FEV 1.0%.

Not suitable for the crowd

Unsuitable for people: people who have recently taken bronchodilators.

Adverse reactions and risks

No special complications or hazards.