| 摘要 |
PCT No. PCT/FR88/00605 Sec. 371 Date Aug. 16, 1989 Sec. 102(e) Date Aug. 16, 1989 PCT Filed Dec. 13, 1988 PCT Pub. No. WO89/05669 PCT Pub. Date Jun. 29, 1989.The invention concerns a process for regulating a respiratory apparatus and the respiratory apparatus itself. The apparatus permits a succession of respiratory cycles depending on patient requirements, such as frequency FR (or respiratory rate RR). The succession of respiratory cycles consists of an inspiration phase, during which the patient is supplied with a current tidal volume (VT) of respirable gaseous fluid, and an expiration phase. The patient has his/her own natural spontaneous respiration, and the pressure in the patient's respiratory passages is defined as Paw. According to the the process, a theoretical respiration volume per minute value, called Vmn optical, is established as a function of the patient's condition and natural spontaneous respiration. Other values are also set or calculated. A minimum current tidal volume (VTmin) and a maximum allowable airway passage pressure, Paw max, are established. The total current tidal volume VT supplied to the patient during each respiratory cycle is monitored, and the artificial respiration is controlled to be within the set values VTmin and Paw max, and to satisfy the relation Vmn optimal=FRxVT in order to vary automatically the artificial respiration from spontaneous breathing to controlled breathing, or vice versa, as a function of the patient's natural spontaneous respiration. |
