| 摘要 |
Process and apparatus for assisting expiration of respiratory gas from the lungs and/or assisting pulmonary blood circulation. The apparatus comprises means for generating a series of pressure pulses and means for transmitting the pressure pulses to air passageways in the lungs through respiratory gas. The generating means can comprise a solenoid controlled pump, a solenoid controlled valve, or a reflector means for directing pulses into the lungs. The transmitting means preferable comprises a tube for placement in the trachea. The frequency, amplitude, and shape of the pressure waves are controlled to outwardly displace walls of collapsed air passageways in the lungs, to maintain the outward displacement, and to generate a pumping action to assist in respiration. Wave characteristics may be controlled manually or modulated by signals derived from an electrocardiogram and/or a pleural pressure sensing means. |
