Patent ID: 11911602
Assignee: CARDIO VOL, I.LC
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 8:
9. A method for assisting a heart of a patient comprising the steps of:
producing a source signal having electrical currents having a frequency with a signal generator of a computer of a sensor implanted in the patient, the sensor in communication with a cardiac assist device implanted into the patient to assist the heart with pumping blood and the heart, the cardiac assist device has a shaft that is adapted to be positioned in the heart, the cardiac assist device includes a pump having a motor and an impeller disposed in the shaft which is driven by the motor to assist the heart with pumping blood, the pump draws blood from a left ventricle of the heart through an inlet port of the shaft and expels blood into an ascending aorta of the heart through an outlet port of the shaft, thereby reducing mechanical load on the heart and promoting recovery, the sensor includes electrodes directly attached to the cardiac assist device that emit the source signal, and the electrodes are in direct contact with the shaft that is positioned in the heart the computer performing data acquisition and analysis of the source signal, the signal generator in communication with the electrodes, the computer measures corresponding voltages to make admittance-based measurements and analyzes the admittance-based measurements to make real-time admittance-based volume measurements of the heart, the sensor dynamically shifting the frequency of the electrical currents of the source signal to avoid noise in the patient from the pump during operation of the cardiac assist device while the cardiac assist device is implanted in the patient, and a microcontroller clock or oscillator that is at a frequency at least 100x higher than the electrical currents at the frequency;
monitoring the heart with the source signal produced by the sensor; and
the sensor dynamically shifting the frequency of the electrical currents of the source signal in real time to avoid noise in the patient from the pump.