Patent · US Expired

Method for detecting the respiratory phases of a patient during an assisted ventilating process

US5303700A · kind A · utility

125Cited by

2References

9Claims

0Family size

Assignee

DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

Dieter Weismann · Gronau, DE
Marcel Baum · Wien, AT

Key dates

Filing date	Jul 6, 1992
Grant date	Apr 19, 1994
Priority date	—
Expiry date	Jul 6, 2012

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2016/0036
WIPO fieldMedical technology
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.