How do ventilators help COVID-19 patients?

Recently, as a result of the global spread of the new coronavirus, “ventilators” once became a key word in the Internet. Transforming the progress of modern medicine, ventilators are increasingly replacing emergency and critical care, breathing after surgery, how much do know about ventilators?

Principle of Ventilator

The ventilator uses mechanical means to help the gas replace the patient’s lungs when inhaling, and to help the patient expel exhaust gas from the lungs when exhaling. Circulate in this way to assist or control the patient’s breathing.

Type of ventilator

According to the connection with the patient, it is divided into non-invasive ventilator and invasive ventilator. General household ventilators are mostly non-invasive ventilators.

Non-invasive ventilator The ventilator is connected to the patient through a mask and is mostly used for conscious patients.

Invasive ventilator The ventilator is connected to the patient through tracheal intubation or tracheotomy, and is mostly used for critically ill patients with altered consciousness and patients who have been on mechanical ventilation for a long time.

Suitable for the crowd

Patients with chronic bidirectional pulmonary disease (COPD) For conscious COPD patients with stable vital signs, a non-invasive ventilator can be used for early intervention, that is, non-invasive ventilator for positive pressure assisted ventilation. The ventilator assists the patient to breathe, which can relieve respiratory muscle fatigue to a certain extent.

Due to the conventional treatment of adult OSA without obvious comorbidities, it is necessary to choose continuous and cause-induced sleep apnea (OSA) patients with hypoxia caused by snoring during sleep, and long-term repeated hypoxia is easy to combine with cardiovascular and cerebrovascular diseases, which are harmful to humans. health. The ventilator continues to give breathing pressure when the patient breathes, even if the patient’s breathing has stopped, the gas continues to be delivered to the lungs, thereby reducing the patient’s symptoms of lack of oxygen. After using a ventilator for night sleep, patients with long-term sleep apnea (OSA) have improved their lack of oxygen at night, improved their sleep quality, and will also supplement them during the day.


1. Patients with chronic bidirectional pulmonary disease (COPD) should choose a non-invasive ventilator with bilevel positive airway pressure (BIPAP) mode for treatment.

2. Choice of mask:

1. Pay attention to the physical try-on. If the mask is too large or does not match the patient’s face shape, it is easy to cause air leakage, which will affect the triggering of the ventilator or terminate the air delivery.

2. The mask should not be buckled too tightly, it will make feel bored if buckled too tightly, and will cause local skin pressure marks. Generally, it is better to easily insert one or two fingers beside face after buckling the headband.

For doctors, due to the widespread use of ventilators, the success rate of saving lives has increased. At the same time, patients using a non-invasive ventilator at home can also improve the quality of life and ease the development of the disease. Since a non-invasive ventilator is essentially a medical device, it is recommended to consult a doctor before use.

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