Patent ID: 7527054
Filing Date: 2009-05-05
Classification: A61B,A61M

Abstract:
1. A method of operating a ventilator to control the fraction of pressure inspired oxygen (FiO 2 ), the method comprising: providing a pulse oximeter to measure a patient's pulse oximetry; providing a FiO measuring the patient's pulse oximetry and providing a measured pulse oximetry value; averaging the patient's measured pulse oximetry value over a period of time; providing a ventilator controller responsive to the average of the patient's measured pulse oximetry value, wherein the FiO selecting the time period for averaging the patient's measured pulse oximetry value; selecting a first, a second, and a third pulse oximetry level as set points for the ventilator controller; selecting an FiO selecting a first incremental amount for decreasing the flow rate of FiO selecting an update time interval, wherein the update time interval is the interval of time between comparisons by the ventilator controller of the set points and the averaged measured pulse oximetry value of the patient; setting the FiO decreasing the flow rate of FiO increasing the flow rate of FiO increasing the flow rate of FiO