Method for detecting the respiratory phases of a patient during

Details Method for detecting the respiratory phases of a patient during Method for detecting the respiratory phases of a patient during

1992-07-06

1994-04-19

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820418, 12820421, 12820426, A61M 1600

Patent

active

053037006

ABSTRACT:
The invention relates to a method for recognizing the respiratory phases of a patient for controlling a ventilating apparatus. The time-dependent trace of a signal, which represents the respiratory flow curve and is emitted by a signal device, is determined and from this trace, a trigger criterium is obtained for the switchover of the ventilating apparatus from the expiration phase into the inspiration phase and/or from the inspiration phase into the expiration phase. The method is improved in that even for chronically obstructive patients, a reliable and early recognition of the inspiration and expiration attempts is possible. A significant increase of the slope of the respiratory flow curve between each two zero crossovers of this curve is used as a trigger criterium.

REFERENCES:
patent: 3834382 (1974-09-01), Lederman et al.
patent: 4050458 (1977-09-01), Friend

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