spont is the abbreviation of spontaneous, in medicine it means used for patients with spontaneous breathing, the meaning of spontaneous breathing mode, in the operation of the ventilator, the first step is to select the patient’s breathing mode, the modern models most commonly used in three modes: 1.A/C (assisted/controlled ventilation): when the patient is breathing spontaneously, the machinery starts with the breathing, and once spontaneous breathing does not occur within a certain period of time, the mechanical ventilation is automatically changed from assisted to controlled ventilation. It belongs to intermittent positive pressure ventilation. 2. SIMV (Synchronized Intermittent Command Ventilation): The ventilator receives signals of negative pressure in the airway due to spontaneous breathing at certain intervals, and sends out the airflow synchronously, and carries out assisted ventilation intermittently. 3. SPONT (spontaneous breathing): the work of the ventilator is controlled by the patient’s voluntary breathing. In the use of the ventilator operation, the first need to choose the parameters of the ventilator settings, which also requires belonging to the non-clinical engineering staff and clinical medical personnel, as well as to understand the meaning of the parameters of the respiratory machine, requirements, range, and so on.