A ventilator including an inspiration flow control unit and an expiration flow control unit coupled to the inspiration flow control unit. The ventilator also includes a nasal intermittent mandatory ventilation (NIMV) control system coupled to the inspiration flow control unit and the expiration flow control unit. The NIMV control system is configured to automatically and simultaneously adjust an inspiration flow and an expiration flow. A pressure of the inspiration flow is increased from a baseline pressure to a control pressure. A pressure of the expiration flow is retumed to the baseline pressure.一種呼吸器其包括一吸氣氣流控制單元以及一與該吸氣氣流控制單元耦合的呼氣氣流控制單元。該呼吸器亦包括一鼻用間歇性強制換氣(NIMV)控制系統,其係與該吸氣氣流控制單元及該呼氣氣流控制單元耦合。該NIMV控制系統係經組配用以自動地且同時地調整一吸氣氣流及一呼氣氣流。該吸氣氣流之一壓力係由一底線壓力增加至一控制壓力。該呼氣氣流之一壓力係回復至該底線壓力。100...呼吸器110...吸氣氣流115...呼氣氣流120...吸氣控制器125...NIMV模組130...呼氣控制器135...NIMV模組140...壓力參考產生器142...病患氣道壓力估測器143...內回路流動估測器145...NIMV模組150...吸氣氣流控制閥160...呼氣氣流控制閥170...吸氣氣流感應器175...呼氣氣流感應器190...病患用迴路195...鼻翼管