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Early warning of LVAD thrombus formation

A blood pump, trending technology, applied in the field of blood pump, can solve problems such as increased power, corrosion failure, etc.

Pending Publication Date: 2020-09-11
HEARTWARE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, implanting such sensors requires sensor calibration, which can fail due to corrosion or other events
Further, such sensors and corresponding calibrations increase the power required to operate the VAD

Method used

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  • Early warning of LVAD thrombus formation
  • Early warning of LVAD thrombus formation
  • Early warning of LVAD thrombus formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1: A method for determining adverse events in a patient with an implanted blood pump comprising:

[0065] calculating a plurality of power consumption trends of the blood pump during a plurality of time periods using the first low pass filter and the second low pass filter;

[0066] determining a plurality of power trend differences between the plurality of power consumption trends;

[0067] calculating an aggregate of a plurality of power trend differences during a time interval; and

[0068] An alert is generated when the sum of multiple power trend differences exceeds a predetermined threshold.

Embodiment 2

[0069] Embodiment 2: The method of embodiment 1, wherein calculating the plurality of power consumption trends comprises calculating short-term trends using a first low pass filter.

Embodiment 3

[0070] Embodiment 3: The method of embodiment 2, wherein calculating the plurality of power consumption trends comprises calculating the long-term trend using a second low pass filter having a lower cutoff frequency than the first low pass filter Cut-off frequency.

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PUM

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Abstract

A method of determining an adverse event within a patient having an implantable blood pump includes calculating a plurality of power consumption trends of the blood pump during a plurality of time periods using a low-pass filter, determining a plurality of power trend differences between the plurality of power consumption trends, calculating a total amount of the plurality of power trend differences during a time interval, and generating an alarm when the total amount of the plurality of power trend differences exceeds a pre-determined threshold.

Description

technical field [0001] The technology generally relates to blood pumps and determining adverse events associated with the blood pumps. Background technique [0002] A mechanical circulatory support device ("MCSD") is a life-saving mechanical device configured to assist the heart in pumping blood throughout the body. One known type of MCSD is a ventricular assist device ("VAD"), which may include a centrifugal pump, axial pump, or other type of Solenoid pump. One such centrifugal pump is pumps, and one such axial pump is the Pumps, each manufactured by HeartWare, Miami Lakes, FL, USA. [0003] The VAD is desirably equipped with a rotor and non-contact bearings so that in operation the rotor floats within the housing. With contactless bearings, there is no solid-to-solid contact between the rotor and housing, and thus no mechanical wear during operation. One form of non-contact bearings is a hydrodynamic bearing. In a hydrodynamic bearing, fluid is pumped across betwe...

Claims

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Application Information

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IPC IPC(8): A61M1/10A61M1/12
CPCA61M60/422A61M60/216A61M60/508A61M60/178A61M60/585A61M60/148G16H40/63A61M2205/18A61M2205/3327A61M2205/50
Inventor A·卡德罗卡R·W·斯塔德勒R·C·布朗
Owner HEARTWARE INC
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