Bionic Cough Stimulator help the patients with invasive mechanical ventilation clear the secretions from the airway by simulating the mechanism of normal physiological cough. This product has patented technology for invention (invention patent number ZL201580000283.2). BCS3 can effectively expel sputum while ensuring normal ventilation without disconnecting the ventilator. Simulating the physiological cough mechanism avoids the damage to the airway caused by the current routine sputum excretion process.