In psv mode, when the patient's tidal volume is found to be insufficient, the preset pressure parameters of PSV can be adjusted to increase the tidal volume.
In modern clinical medicine, ventilators, as an effective means of artificially replacing autonomous ventilation function, have been widely used for respiratory failure caused by various causes, anesthesia respiratory management during major surgery, and Supportive treatment and emergency resuscitation occupies a very important position in the field of modern medicine.
The ventilator is a vital medical device that can prevent and treat respiratory failure, reduce complications, and save and extend the patient's life.
What to do if the ventilator displays low tidal volume
If the ventilator displays low tidal volume, you need to check whether the ventilator settings are appropriate and adjust the parameters according to the patient's condition. After excluding the above reasons, it is suggested that the patient may have insufficient alveolar ventilation, and needs timely treatment such as closed chest drainage, phlegm reduction and asthma relief.
1. Adjust parameters: If the alarm low limit is set too high or the ventilator parameters are set improperly, the ventilator may display low tidal volume. The ventilator alarm line and parameters need to be adjusted according to the actual situation of the patient. In addition, air leakage in the ventilator circuit will also indicate low tidal volume. It is necessary to carefully check whether there is a break in the ventilator circuit or the pipe connection is not tight, and then deal with it in time.
2. Chest closed drainage: For patients with pneumothorax or pleural effusion, liquid or gas may cause compression of the lungs, which may cause the ventilator to display low tidal volume. Closed chest drainage can be done to reduce the pressure of liquid or gas on the lungs, thereby improving the patient's low tidal volume.
3. Resolving phlegm and relieving asthma: Patients with chronic obstructive pulmonary disease and asthma experience tracheospasm. Increased secretions in the airways cause insufficient alveolar ventilation, which will cause the ventilator to display low tidal volume. You can follow the doctor's advice to give phlegm-reducing and antiasthmatic drugs, such as ambroxol hydrochloride tablets and doxofylline for injection, which can reduce airway spasm, reduce secretions, and thus increase tidal volume.
4. Others: Respiratory muscle weakness occurs, or breathing is suppressed when too many sedatives are given, which can cause insufficient alveolar ventilation, causing the ventilator to display low tidal volume. Nutrition can be increased, appropriate ventilator parameters can be adjusted, and the patient's respiratory muscle fatigue and weakness can be improved. It is also necessary to reduce the dose of sedatives to reduce the inhibition of respiratory muscles by sedatives, thereby improving the patient's low tidal volume.