(i9) United States
(12) Patent Application Publication
EGER et al.
Marcus EGER, Lubeck (DE);
Thomas HANDZSU J, Lubeck
(DE); Zhanqi ZHAO, Freiburg
(DE); Knut MOLLER, Kirchzarten
MCGLEW & TUTTLE, PC
P.O. BOX 9227, SCARBOROUGH STATION
SCARBOROUGH, NY 10510-9227 (US)
(73) Assignee: DRAGER MEDICAL AG & CO.
KG, Lubeck (DE)
(21) Appl.No.: 12/754,055
(22) Filed: Apr. 5, 2010
A respirator with an adjustable pressure or volume flow curve has a control and analyzing unit, which is set up to determine the resistance R and the alveolar pressure PaZv(t). The control and analyzing unit checks the functional dependence of Palv (t) and of the tidal volume Vol(t) for time intervals in which an indicator of the quality of a linear functional dependence of PaZv(t) and Vol(t) meets a preset threshold criterion and to determine the elastance E or compliance C from the rise of the alveolar pressure PaZv(t) as a function of the volume Vol(t) only in the time intervals thus determined.