Patent ID: 8230858
Filing Date: 2012-07-31
Classification: A61B,A61M

Abstract:
1. A method for controlling a respiratory gas monitor device, the respiratory gas monitor device including: at least one respiratory gas analyzer, a gas sampling line flow-connected to a breathing tube suitable for feeding of respiratory gas to and from a patient, a gas pump for sucking sample(s) of respiratory gas from said breathing tube through said gas sampling line, a power supply and a processing unit, and a pressure sensor pressure-connected to said gas sampling line and electrical-signal-connected to said processing unit, wherein the method comprises: detecting by said processing unit a minimum value and a maximum value in the signal forwarded by said pressure sensor, wherein the minimum value in the signal represents a minimum pressure and wherein the maximum value in the signal represents a maximum pressure respectively inside said gas sampling line; calculating a difference between said minimum value and said maximum value; comparing said calculated difference with a predetermined threshold value programmed in or to said processing unit; and (a) if said calculated difference is below said threshold value, switching said gas pump off or keeping said gas pump non-operating by said processing unit, and (b) if said calculated difference is over said threshold value, switching said gas pump on or keeping said gas pump operating by said processing unit.