US 2024/0189573 A1 · ESTIMATING CONTRACTILE RESERVE USING A MECHANICAL CIRCULATORY SUPPORT DEVICE

Abstract

Methods and apparatus for determining a contractile reserve of a heart of a patient are provided. The method includes controlling a heart pump to operate at a first speed, determining based on a motor current signal received from a motor when the heart pump is operating at the first speed, a first value for a cardiac contractility metric, controlling the heart pump to operate at a second speed, determining based, at least in part, on the motor current signal received from the motor when the heart pump is operating at the second speed, a second value for the cardiac contractility metric, determining a contractile reserve metric based, at least in part, on the first value and the second value of the cardiac contractility metric, and outputting an indication of the contractile reserve metric on a user interface associated with the heart pump.

Claims24

Dependent claims

A method of determining a contractile reserve of a heart of a patient, the heart having a mechanical circulatory support device arranged therein, the method comprising:

controlling the mechanical circulatory support device to operate at a first performance level;
determining based, at least in part, on a motor current signal received from a motor when the mechanical circulatory support device is operating at the first performance level, at least one first value for a cardiac contractility metric;
controlling the mechanical circulatory support device to operate at a second performance level;
determining based, at least in part, on the motor current signal received from the motor when the mechanical circulatory support device is operating at the second performance level, at least one second value for the cardiac contractility metric;
determining a contractile reserve metric based, at least in part, on the at least one first value and the at least one second value of the cardiac contractility metric;
and
outputting an indication of the contractile reserve metric on a user interface associated with the mechanical circulatory support device.

4 more elements

A mechanical circulatory support device, comprising:

a rotor;
a motor configured to drive rotation of the rotor at a plurality of speeds;
and
at least one controller configured to:
control the motor to operate at a first speed;
determine based, at least in part, on a motor current signal received from the motor when operating at the first speed, at least one first value for a cardiac contractility metric;
control the motor to operate at a second speed;
determine based, at least in part, on a motor current signal received from the motor when operating at the second speed, at least one second value for the cardiac contractility metric;
determine a contractile reserve metric based, at least in part, on the at least one first value for the cardiac contractility metric and the at least one second value for the cardiac contractility metric;
and
output an indication of the contractile reserve metric on a user interface associated with the mechanical circulatory support device.

8 more elements

A controller for a mechanical circulatory support device, the controller comprising:

at least one hardware processor configured to:
control a motor of the mechanical circulatory support device to operate at a first speed;
determine based, at least in part, on a motor current signal received from the motor when operating at the first speed, at least one value for a cardiac contractility metric;
control the motor to operate at a second speed;
determine based, at least in part, on a motor current signal received from the motor when operating at the second speed, at least one second value for the cardiac contractility metric;
determine a contractile reserve metric based, at least in part, on the at least one first value for the cardiac contractility metric and the at least one second value for the cardiac contractility metric;
and
output an indication of the contractile reserve metric on a user interface associated with the mechanical circulatory support device.

5 more elements

Dependencies are inferred from the claim text.

Estimating contractile reserve using a mechanical circulatory support device

Life of this patent

Estimating contractile reserve using a mechanical circulatory support device

Life of this patent

Abstract

Claims24