How are ventilators categorized?

S mode is also known as autonomous trigger mode or synchronized mode. It means that a person controls the work of the machine through his/her own breathing (the machine provides inspiratory pressure during inhalation and expiratory pressure during exhalation), and the working frequency of the machine is completely controlled by the patient's own breathing, and the ventilator is fully synchronized with the patient's breathing rate, but if the patient's autonomous respiration stops, the ventilator stops working as well. This mode is mainly suitable for patients with good respiratory trigger ability.

T mode is also known as passive mode or time control mode. The machine controls the person's breathing according to the set parameters, and the person can only passively follow the work of the machine. This mode is mainly suitable for patients with weak respiratory trigger ability.

S/T mode is synchronized/time mode. In this mode, if the patient's voluntary breathing is good, the ventilator and the patient's respiratory rate remain completely synchronized; if the patient's respiration is unstable or stops, the ventilator gives the patient controlled ventilation in accordance with the pressure, respiratory rate, and inhalation/exhalation ratio preset in advance.

In modern clinical medicine, the ventilator, as an effective means of artificially replacing the function of voluntary ventilation, has been commonly used in respiratory failure due to various causes, anesthesia respiratory management during major surgery, respiratory support therapy and emergency resuscitation, and occupies a very important position in the field of modern medicine. The ventilator is a medical device that can prevent and treat respiratory failure, reduce complications, and save and prolong the patient's life.