Medical system for treating a left atrial appendage

Patent metadata

Field	Value
Publication number	US-12383201-B2
Application number	US-202217591101-A
Country	US
Kind code	B2
Filing date	Feb 2, 2022
Priority date	Feb 3, 2021
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A medical system for monitoring a left atrial pressure in a heart of a patient may include an implantable device including an expandable framework and a first sensor secured to the expandable framework and an external component configured to communicate wirelessly with the implantable device. The first sensor may be configured to detect a first measurement. The first sensor may be a pressure sensor and the first measurement may be the left atrial pressure. The implantable device or the external component may include a processor configured to create a first trend for the first measurement. The processor may be configured to use the first trend to modify the first measurement prior to outputting a corrected result.

First claim

What is claimed is:

1. A method of autonomous recalibration of a pressure sensor used to detect a left atrial pressure within a heart of a patient, comprising:
detecting signals of the left atrial pressure using a first sensor coupled to an expandable framework, the expandable framework being implantable within a left atrial appendage of the heart of the patient;
detecting signals of a third heart sound (S3) from the heart of the patient using a second sensor coupled to the expandable framework;
using the signals of the left atrial pressure to establish a trend of the left atrial pressure with a processor;
using the signals of the third heart sound to establish a trend of the third heart sound with the processor;
comparing the trend of the left atrial pressure to the trend of the third heart sound with the processor to determine if the first sensor is experiencing drift, including comparing a slope of the trend of the left atrial pressure to a slope of the trend of the third heart sound; and
using the trend of the third heart sound to correct the trend of the left atrial pressure to remove the drift with the processor;
outputting a corrected trend of the left atrial pressure devoid of the drift.

2. The method of claim 1 , wherein using the trend of the third heart sound to correct the trend of the left atrial pressure to remove the drift includes subtracting a difference between the slope of the trend of the third heart sound and the slope of the trend of the left atrial pressure from the trend of the left atrial pressure.

3. The method of claim 1 , wherein when the drift exceeds a predetermined limit, the method further includes issuing a warning to manually recalibrate the first sensor.

4. The method of claim 1 , wherein the first sensor has a first sensing modality and responds to a first set of daily physiological changes of the heart, and the second sensor has a second sensing modality different from the first sensing modality and responds to the first set of daily physiological changes of the heart.

Assignees

• Boston Scient Scimed Inc

Inventors

• Stahmann Jeffrey E
• Mi Bin
• Maile Keith R

Classifications

• A61F2/243

  Deployment by mechanical expansion · CPC title

• A61B2562/0247

  Pressure sensors · CPC title

• A61B5/0004

  characterised by the type of physiological signal transmitted · CPC title

• A61B2562/16

  Details of sensor housings or probes; Details of structural supports for sensors (A61B2560/0462 takes precedence) · CPC title

• A61B5/0215

  by means inserted into the body · CPC title