A control method, a control system and a processing apparatus for a ventilator are provided. The control system contains the processing apparatus and the ventilator. The ventilator is in a spontaneous breath support mode, and is used to receive ventilation parameters. The processing apparatus is coupled with the ventilator. The processing apparatus is used to receive and detect the ventilation parameters through the ventilator. In a case that SPO2 is enough and a patient is capable of spontaneous breath, the processing apparatus calculates target Otis curves based on Otis equation, and determines whether to adjust a breath support level of the ventilator, to find an optimal minute volume required for the patient at this moment.本發明實施例提供一種呼吸器的控制方法、控制系統及處理裝置。此控制系統包括呼吸器及處理裝置。呼吸器處於自發性呼吸輔助模式下,並用以接收呼吸參數。處理裝置耦接呼吸器。處理裝置透過呼吸器接收並偵測呼吸參數。關於每分鐘通氣量的量測,在血氧飽和度足夠(例如,大於90%),且病人有自主呼吸的能力下,基於奧提斯公式計算目標奧提斯曲線,並判斷是否對呼吸器調整呼吸輔助程度。藉此,病人可在不受環境干擾下,找尋病人在此時需要的最佳每分鐘通氣量。S210~S270:步驟
