Patent ID: 11857309
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 14:
15. A device for determining respiration in a patient, the device comprising:
a first accelerometer for detecting a motion in the x, y and z-axis;
a second accelerometer for detecting a tilt about the z-axis;
at least one acoustic sensor for detecting sound related to the patient's breath;
a memory comprising a lookup table, a real-time clock, and one or more instructions;
a processor configured to:
calculate motion values from signals received from the first accelerometer;
calculate tilt values from signals received from the second accelerometer;
calculate sound values from signals received from the acoustic sensor;
filters the motion values and the tilt values according to limitations stored in the lookup table, to provide filtered motion values;
filters the sound values according to limitations stored in the lookup table, to provide filtered sound values;
assigns a time stamp to each filtered motion value and each filtered sound value using the real-time clock within the memory;
determines local maximums for the filtered motion values and local minimums for the filtered sound values;
counts and stores a completed breath for every time one of the local maximums for the filtered motion values occurs during one of the local minimums for the filtered sound values;
calculates a respiration rate using the counted completed breaths and the assigned time stamps; and

a display screen, wherein the display screen displays the calculated respiration rate.