Case Display

Clinical use 1 Beijing Chaoyang Hospital ICU

Sun Bing

Beijing Chaoyang Hospital Affiliated to Capital Medical University

Doctor of Medicine, Chief Physician, Professor

Beijing Chaoyang Hospital Affiliated to Capital Medical University

Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Diseases

Member of the Respiratory Critical Care Group, Chinese Medical Association Respiratory Disease Branch

The minimal closure technique requires two people to cooperate during continuous positive airway pressure treatment. One person listens to the throat and the other slowly inflates the air bag until no air leakage is heard. Then, 0.5 ml of gas is withdrawn each time until a small amount of air leakage occurs during exhalation. Then, the air is inflated from 0.1 ml again until no air leakage is heard during inhalation. The minimal closure technique takes a long time to operate and has many steps. It requires the cooperation of two people. Expert consensus recommends that the minimal closure technique should not be used routinely to inflate the air bag. When the air bag pressure cannot be measured, the minimal closure technique can be used temporarily to inflate the air bag.

The most common clinical monitoring method for airbags is to hold the airbag pressure gauge, connect the catheter inflation interface to the airbag pressure gauge inflation valve, slowly inflate and observe the pressure changes. After the air is replenished and the pressure is measured, there will be a gas leakage of 2~3cmH2O when the pressure measuring tube is separated. It is necessary to add 2cmH2O to the ideal pressure value to compensate for the leakage. Under the premise of correct use, the airbag pressure gauge measures accurate data. However, this method requires manual measurement, cannot be sustained, and there is a trace amount of gas leakage when it is withdrawn, so it needs to be calibrated regularly.

At present, some electronic airbag monitoring methods have appeared in clinical practice (Figure 2), which are convenient for monitoring airbag pressure and reducing clinical work. The electronic airbag pressure gauge can continuously monitor the changes in airbag pressure and give an alarm in time, but it also requires manual pressure adjustment. The automatic airbag inflation pump can realize real-time monitoring and intelligent control of the artificial airway airbag pressure, automatically inflate/deflate, without manual adjustment, and electronic data recording and export throughout the process.