| 摘要 |
Process for measuring the hyperinsufflation level of a patient under ventilatory assistance from a machine, the cycle of which comprises: insufflation (1), during which a constant flow of air is introduced into the patient's respiratory tract, a pause (2) during which respiration is blocked, and expiration (3), during which the patient's respiratory tract is exposed to a natural flow of air. The process involves the following stages: measuring the pressure (P) at the opening of the respiratory tract; determining the line segment (AB) corresponding to the substantially linear part of the pressure variation as a function of time during insufflation; determining the value of the pressure (PO) for the point of the line segment (AB) corresponding to the moment (tO) when insufflation commences; measuring the fall in pressure (<v>P) occurring during the pause; and determining the difference between said pressure value and said fall in pressure.
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