The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 1998
Filed:
May. 03, 1996
Hans-Joachim Kohl, Lubeck, DE;
Dragerwerk Aktiengesellschaft, Lubeck, DE;
Abstract
The invention is directed to a method for adjusting the respirating pressure during respirating phases in a ventilating apparatus. The method is improved by providing for a volume-controlled ventilation under the conditions of pressure-controlled ventilation as well as allowing for self-respiratory activity. The method includes the steps of: fixing a respirating volume desired value V.sub.TS and an inhalation pressure desired value P.sub.IS ; actuating the inhalation valve during inhalation in a first inhalation stroke to adjust the inhalation pressure P.sub.I to the inhalation pressure desired value P.sub.IS ; comparing the respiratory volume V.sub.T to the respirating volume desired value V.sub.TS and, if the respirating volume V.sub.T is less than the respirating volume desired value V.sub.TS, then, during the next inhalation stroke following the first inhalation stroke, incrementally increasing the inhalation pressure desired value P.sub.IS by a pressure increment .DELTA.P until the respirating volume V.sub.T is greater than or equal to the respirating volume desired value V.sub.TS ; and, during each inhalation, comparing the inhalation pressure P.sub.I to the inhalation pressure desired value P.sub.IS and, if the inhalation pressure P.sub.I increases to a value greater than P.sub.IS because of an intended exhalation, then, opening the exhalation valve to an extent so that the inhalation pressure desired value P.sub.IS is reestablished as the inhalation pressure P.sub.I.