WO-2026096246-A1 - POSTURE DETECTION AND PATIENT MANAGEMENT

Abstract

Systems and methods are disclosed for improving posture detection to optimize medical device system resource allocation, including clustering received posture information occurring over a first time period into at least two clusters including a supine or upright cluster and at least one other cluster, determining, for each respective cluster, an opposite density measure indicative of a density of the posture information opposite the respective cluster in multi-dimensional space with respect to the posture sensor, identifying the supine or upright cluster using the opposite density measures of the at least two clusters, and determining the posture information for the patient using the identified supine or upright cluster.

Inventors

• DESAI, Pushti
• THAKUR, PRAMODSINGH HIRASINGH
• AVERINA, VIKTORIA A.
• SHUTE, JONATHAN BENNETT

Assignees

• CARDIAC PACEMAKERS, INC.

Dates

Publication Date

20260507

Application Date

20251021

Priority Date

20241029

Claims (15)

1. 1. A medical device system for improving posture detection to optimize medical device system resource allocation, comprising: means for receiving posture information of a patient from a posture sensor of an ambulatory medical device, the posture information including posture information from multiple axes with respect to the posture sensor of the ambulatory medical device; means for clustering the received posture information occurring over a first time period into at least two clusters, wherein one of the at least two clusters includes a supine or upright cluster and at least one other cluster; means for determining, for each respective cluster, an opposite density measure indicative of a density of the posture information opposite the respective cluster in multidimensional space with respect to the posture sensor; means for identifying the supine or upright cluster using the opposite density measures of the at least two clusters; and means for determining posture information for the patient using the identified supine or upright cluster.
2. 2. The medical device system of claim 1, wherein the means for receiving posture information includes a signal receiver circuit configured to receive posture information of the patient from the posture sensor of the ambulatory medical device, wherein the means for clustering, determining, identifying, and determining includes an assessment circuit configured to: cluster the received posture information occurring over the first time period into the at least two clusters, wherein one of the at least two clusters includes the supine or upright cluster and the at least one other cluster; determine, for each respective cluster, the opposite density measure indicative of the density of the posture information opposite the respective cluster in multidimensional space with respect to the posture sensor; identify the supine or upright cluster using the opposite density measures of the at least two clusters; and BSC Ref. No. 24-0400W001 NMRS Ref. No.: 051666/14139 determine the posture information for the patient using the identified supine or upright cluster.
3. 3. The medical device system of claim 2, wherein the supine or upright cluster includes a supine/upright cluster, wherein the assessment circuit is configured to identify the supine/upright cluster as the respective cluster having a lowest of the determined opposite density measure.
4. 4. The medical device system of claim 2, wherein the supine or upright cluster includes the upright cluster, wherein the assessment circuit is configured to identify the upright cluster as the respective cluster having a lowest of the determined opposite density measure.
5. 5. The medical device system of claim 2, wherein the at least one other cluster includes a first side cluster and a second side cluster, wherein the assessment circuit is configured to identify a left side cluster and a right side cluster using the first side cluster, the second side cluster, and the supine or upright cluster.
6. 6. The medical device system of any of claims 2 through 5, wherein the posture sensor of the ambulatory medical device includes a three-dimensional accelerometer, wherein the posture information includes three-dimensional acceleration information with respect to the accelerometer of the ambulatory medical device, wherein the assessment circuit is configured to determine, for each respective cluster, the opposite density measure indicative of the density of the three-dimensional acceleration information occurring over the first time period opposite the respective cluster.
7. 7. The medical device system of claim 6, wherein the assessment circuit is configured to separate the supine or upright cluster into separate supine and upright clusters based on a spread of the three-dimensional acceleration information in the supine or upright cluster, wherein the spread of the supine cluster is less than the spread of the upright cluster. BSC Ref. No. 24-0400W001 NMRS Ref. No.: 051666/14139
8. 8. The medical device system of claim 7, wherein the three-dimensional acceleration information is with respect to UVW space of the accelerometer of the ambulatory medical device, wherein the assessment circuit is configured to: determine centroids of at least three clusters; and transform the three-dimensional acceleration information from the UVW space of the accelerometer into XYZ space of the patient using the determined centroids of the at least three clusters.
9. 9. The medical device system of claim 8, wherein to determine the centroids of the at least three clusters includes to determine centroids of the supine cluster, a first or left side cluster, and a second or right side cluster.
10. 10. The medical device system of any of claims 8 through 9, wherein the assessment circuit is configured to label the three-dimensional acceleration information and to determine posture trends for the patient over the first time period using the labeled information.
11. 11. The medical device system of claim 10, wherein the assessment circuit is configured to determine a patient health status using changes in the determined posture trends.
12. 12. The medical device system of any of claims 10 through 11, wherein the assessment circuit is configured to provide an output of the determined posture trends to a user interface for display to a user or to another circuit to control or adjust a process or function of the medical device system.
13. 13. The medical device system of any of claims 10 through 12, wherein the assessment circuit is configured to compare the determined posture trends for the patient over the first time period to determined posture trends for the patient over one or more other time periods and to provide an alert if the determined posture trends for the patient over the first time period exceed the determined posture trends for the patient over the one or more other time periods by more than a threshold amount. BSC Ref. No. 24-0400W001 NMRS Ref. No.: 051666/14139
14. 14. The medical device system of any of claims 10 through 13, wherein the assessment circuit is configured to alter or adjust one or more modes or functions of the ambulatory medical device or the medical device system based on the determined posture trends for the patient over the first time period, wherein the one or more modes or functions includes at least one of: an active state of a sensor of the medical device system, a sampling frequency or resolution of a sensor of the medical device system, an amount of data storage of the ambulatory medical device or the medical device system, or a time or amount of communication of stored information outside of the ambulatory medical device.
15. 15. A method for improving posture detection to optimize medical device system resource allocation, comprising: receiving acceleration information of a patient from an accelerometer of an ambulatory medical device, the acceleration information including three-dimensional acceleration information with respect to the accelerometer of the ambulatory medical device; and determining posture information for the patient using the received acceleration information, including: clustering the received acceleration information occurring over a first time period into at least two clusters, wherein one of the at least two clusters includes a supine or upright cluster and at least one other cluster; determining, for each respective cluster, an opposite density measure indicative of a density of the three-dimensional acceleration information opposite the respective cluster; identifying the supine or upright cluster using the opposite density measures of the at least two clusters; and determining the posture information for the patient using the identified supine or upright cluster.

Description

BSC Ref. No. 24-0400W001 NMRS Ref. No.: 051666/14139 POSTURE DETECTION AND PATIENT MANAGEMENT CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims the benefit of and priority to U.S. Provisional Application No. 63/713,144, filed October 29, 2024, the entire contents of which is hereby incorporated by reference. TECHNICAL FIELD [0002] This document relates generally to medical devices and more particularly to systems and methods for improving posture detection to optimize medical device system resource allocation. BACKGROUND [0003] Ambulatory medical devices (AMDs), including implantable, subcutaneous, wearable, insertable, or one or more other medical devices, etc., can monitor, detect, or treat various conditions, including heart failure (HF), arrhythmia, etc. Ambulatory medical devices can include sensors to sense physiologic information from a patient and one or more circuits to detect one or more physiologic events using the sensed physiologic information or transmit sensed physiologic information or detected physiologic events to one or more remote devices. Additionally, ambulatory medical devices can be configured to provide electrical stimulation or one or more other therapies or treatments to the patient, such as to improve cardiac function, etc. [0004] Ambulatory patient monitoring can provide early detection of worsening patient condition, including worsening heart failure, arrhythmia, etc. Accurate identification of patients or groups of patients at an elevated risk of future adverse events may control mode or feature selection or resource management of one or more medical devices, control notifications or messages in connected systems to various users associated with a specific patient or group of patients, organize or schedule physician or patient contact or treatment, or prevent or reduce patient hospitalization. Correctly identifying and safely managing patient risk of worsening condition may avoid unnecessary medical interventions, extend the usable life of medical devices, and reduce healthcare costs. In addition, in situations where different operating modes, features, or therapies are available, correctly monitoring, detecting, and identifying patient health BSC Ref. No. 24-0400W001 NMRS Ref. No.: 051666/14139 status, including improving or worsening patient condition, and modifying one or more medical device functions based thereon, can improve medical device efficiency, such as by reducing unnecessary resource consumption, thereby extending the usable life of the ambulatory medical device. SUMMARY [0005] Systems and methods are disclosed for improving posture detection to optimize medical device system resource allocation, including clustering received posture information occurring over a first time period into at least two clusters including a supine or upright cluster and at least one other cluster, determining, for each respective cluster, an opposite density measure indicative of a density of the posture information opposite the respective cluster in multi-dimensional space with respect to the posture sensor, identifying the supine or upright cluster using the opposite density measures of the at least two clusters, and determining the posture information for the patient using the identified supine or upright cluster. [0006] An example of subject matter (e.g., a medical device system for improving posture detection to optimize medical device system resource allocation) may comprise means for receiving posture information of a patient from a posture sensor of an ambulatory medical device, the posture information including posture information from multiple axes with respect to the posture sensor of the ambulatory medical device means for clustering the received posture information occurring over a first time period into at least two clusters, wherein one of the at least two clusters includes a supine or upright cluster and at least one other cluster means for determining, for each respective cluster, an opposite density measure indicative of a density of the posture information opposite the respective cluster in multi-dimensional space with respect to the posture sensor means for identifying the supine or upright cluster using the opposite density measures of the at least two clusters and means for determining posture information for the patient using the identified supine or upright cluster. [0007] In an example, which may be combined with any one or more examples described herein, the means for receiving posture information includes a signal receiver circuit configured to receive posture information of the patient from the posture sensor of the ambulatory medical device, wherein the means for clustering, determining, identifying, and determining includes an assessment circuit configured to cluster the received posture information occurring over the first BSC Ref. No. 24-0400W001 NMRS Ref. No.: 051666/14139 time period into the at least two clusters, wherein one