Patent ID: 8201558
Filing Date: 2012-06-19
Classification: A61B,A61M

Abstract:
1. A method of operating an anesthesia and/or ventilation apparatus including a triggering unit, the method comprising the steps of: determining whether a predetermined relationship is present between a patient cardiac cycle and a triggering of a triggered ventilation stroke based on patient flow data and on data of said patient cardiac cycle; and, in response to a presence of said predetermined relationship, increasing a triggering threshold for triggered ventilation strokes during only one segment of said patient cardiac cycle so as to cause said predetermined relationship to no longer be present, wherein said triggering threshold is increased in a segment of said patient cardiac cycle which begins in a range of 30 to 60 ms after completion of a QRS complex, comprising the further steps of: when the start of at least 80% of the triggered respiratory strokes of a viewed time span lies 30 to 60 ms after completion of the QRS complex and/or the cardiac frequency and the respiratory frequency deviate no more than 20% from each other, then determining, utilizing data taken from an electrocardiogram, that said relationship between said patient cardiac cycle and the triggering of a triggered ventilation stroke is present, and limiting the time of increasing said triggering threshold until the return of a patient flow to the value of zero.