Patent ID: 7708015
Filing Date: 2010-05-04
Classification: A61B,A61M

Abstract:
1. A process for the automatic recording of pressure-volume (PV) curves during artificial respiration with a respirator having an inspiration line and an expiration line, the process comprising the steps of: during an inspiration phase increasing inspiration pressure values during the supply of a breathing gas volume flow under the control of a control unit; detecting breathing gas volume flow values of the breathing gas volume flow; determining volume values of the breathing gas volume flow from the detected breathing gas volume flow values by integration of the detected breathing gas volume flow values over time; during an expiration phase acting on an expiration valve in the expiration line by means of the control unit in case of deviation of a detected expiration phase breathing gas volume flow from a preselected expiration breathing gas volume flow set point in order to return breathing gas volume flow to the set point during said expiration phase; and recording breathing gas pressure values and volume values during inspiration and expiration to record a PV curve.