US 9,808,591 B2
Methods and systems for breath delivery synchronization
Farhad Esmaeil-zadeh-azar, Vista, CA (US)
Assigned to COVIDIEN LP, Mansfield, CO (US)
Filed by COVIDIEN LP, Boulder, CO (US)
Filed on Aug. 15, 2014, as Appl. No. 14/460,615.
Prior Publication US 2016/0045694 A1, Feb. 18, 2016
Int. Cl. A61M 16/00 (2006.01); A61B 5/00 (2006.01); A61B 5/08 (2006.01); A61B 5/113 (2006.01)
CPC A61M 16/0069 (2014.02) [A61B 5/08 (2013.01); A61B 5/4538 (2013.01); A61B 5/4836 (2013.01); A61B 5/7203 (2013.01); A61B 5/7239 (2013.01); A61B 5/7246 (2013.01); A61B 5/7289 (2013.01); A61M 16/0051 (2013.01); A61B 5/113 (2013.01); A61B 5/7278 (2013.01); A61M 2016/0021 (2013.01); A61M 2016/0027 (2013.01); A61M 2016/0039 (2013.01); A61M 2016/0042 (2013.01); A61M 2205/3303 (2013.01); A61M 2205/502 (2013.01); A61M 2230/40 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for ventilating a patient with a ventilator, comprising:
monitoring a physiological parameter of the patient based on one or more received sensor measurements;
calculating a first derivative of the physiological parameter for a first sample period;
selecting a first trigger count threshold;
selecting a first level for the first derivative;
updating a sample count to form a first updated sample count for the first sample period based on first comparison results from at least one of the following:
comparing the first trigger count threshold to a previous trigger count threshold selected in a previous sample period,
comparing the first derivative to a previous first derivative calculated for the previous sample period, and
comparing the first derivative to the first level,
comparing the first updated sample count to the first trigger count threshold; and
triggering inspiration based on a first result of the comparing of the first updated sample count to the first trigger count threshold.