Patent ID: 7798145

Claim:
A device for breath-supporting respiration, the device comprising: a breathing gas source; an expiration valve; an inspiration line from said breathing gas source to a patient; an expiration line from the patient to said expiration valve; a feed means for feeding breathing gas, which is arranged downstream of said breathing gas source and can be actuated; a flow sensor for sensing flow in said expiration line, and for supplying a measured breathing gas flow value dV em /dt; a pressure sensor for determining a breathing gas pressure measured value p vm on the incoming flow side of said expiration valve; a first control for acting on said expiration valve for setting an expiration valve closing pressure p v based on said measured breathing gas flow value dV em /dt and said breathing gas pressure measured value p vm and according to a presetting of a pressure set point; a second control forming a control loop and acting on said feed means as a final control element, said second control setting a gas flow, not equal to zero, with said feed means for determining the expiration valve closing pressure p v , said setting of the gas flow being based on a presetting of a set point for a pre-inspiratory inspiratory gas flow dV emin /dt, not equal to zero, and said breathing gas measured flow value dV em /dt as the actual value; and a control means for generating breathing support by acting on said feed means to provide a breathing support inspiration flow higher than said setting of the gas flow when the pre-inspiratory gas flow dV isoll /dt necessary for maintaining the closing pressure p v exceeds a preset threshold value.