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US 10,864,336 B2Granted
Methods and systems for breath delivery synchronization
AssigneeCovidien LP
InventorFarhad Esmaeil-zadeh-azar
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Abstract
Systems and methods for triggering inspiration and/or cycling exhalation with a ventilator are described herein. In particular, systems and methods for synchronizing ventilator breath delivery with patient breath demand utilizing a digital sample counting trigger mode are described herein. The digital sample counting triggering mode characterizes digital samples taken from a measured or estimated parameter during the patient inhalation/exhalation period to synchronize breath delivery with patient breath demand.
Claims14
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;
- 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 a 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 a 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.
6 more elements
Dependencies are inferred from the claim text.