Sensing for heart failure management

A technology for heart failure and processing circuits, applied in the direction of cardiac catheters, catheters, sensors, etc., can solve problems such as ineffective management of heart failure symptoms, achieve the effect of improving patients' clinical outcomes and increasing confidence

Pending Publication Date: 2020-12-15
MEDTRONIC INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Satisfaction of a threshold or a value that has changed may indicate that the pat

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  • Sensing for heart failure management
  • Sensing for heart failure management
  • Sensing for heart failure management

Examples

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Embodiment Construction

[0032] In general, this disclosure describes example techniques related to determining a patient's heart failure status based on physiological parameters associated with cardiac function monitored by one or more medical devices. Subcutaneous IMDs may be used in some of the example techniques and may be configured for placement under the skin of a patient's torso, such as between the skin and the pectoral muscles. In some examples, the processing circuitry may determine the patient's current Z value, StO, based on signals detected by, for example, a plurality of electrodes of a subcutaneous IMD and one or more optical sensors. 2 value and PTT value. In some examples, the IMD may be leadless, and the optical sensor and electrodes may be integrated with and / or connected to the housing of the IMD.

[0033] The processing circuitry can convert the current Z value, StO 2 Values ​​and PTT values ​​are compared to corresponding baseline values, which may be stored in the memory of t...

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Abstract

In some examples, determining a heart failure status includes using an implantable medical device configured for subcutaneous implantation and comprising a plurality of electrodes and an optical sensor. Processing circuitry of a system comprising the device may determine, for a patient, a current tissue oxygen saturation value based on a signal received from the at least one optical sensor, a current tissue impedance value based on a subcutaneous tissue impedance signal received from the electrodes, and a current pulse transit time value based on a cardiac electrogram signal received from theelectrodes and at least one of the signal received from the optical sensor and the subcutaneous tissue impedance signal. The processing circuitry may further compare the current tissue oxygen saturation value, current tissue impedance value, and current pulse transit time value to corresponding baseline values, and determine the heart failure status of the patient based on the comparison.

Description

technical field [0001] The present disclosure relates generally to medical device systems, and more particularly, to medical device systems configured to monitor patient parameters. Background technique [0002] Certain types of implantable medical devices (IMDs) may be used to monitor one or more physiological parameters of a patient, such as those associated with cardiac function. Such IMDs may include, or may be part of a system that includes, sensors that detect signals associated with such physiological parameters (eg, cardiac depolarization or tissue impedance). Values ​​determined based on such signals can be used to help detect changes in cardiac conditions such as heart failure, assess the efficacy of treatment, or assess heart health in general. [0003] An implantable device that monitors a physiological parameter related to a patient's heart failure condition may evaluate a value associated with the physiological parameter, such as to determine whether the value...

Claims

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Application Information

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IPC IPC(8): A61B5/00A61N1/375A61B5/1459A61B5/024
CPCA61B5/0261A61B5/0538A61B5/1459A61B5/686A61N1/3756G16H40/63A61B5/0205A61B5/02125A61B5/076A61B5/14552A61B5/486A61B5/7275A61B5/7282A61N1/362A61N1/3956A61B5/287
Inventor J·L·库恩J·K·卡内V·沙尔马S·萨卡T·M·基林斯基T·D·贝内特
Owner MEDTRONIC INC
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