Automated calibration of posture state classification for a medical device

US9149210B2 · kind B2 · utility

Assignee

• Medtronic, Inc. · US

Inventors

• Rajeev M. Sahasrabudhe · Maple Grove, US
• Lynn A. Davenport · Roseville, US
• Jon P. Davis · Saint Michael, US
• Wende L. Dewing · Edina, US
• Elizabeth A. Fehrmann · Falcon Heights, US
• Steven M. Goetz · Fridley, US
• Shyam Gokaldas · New Brighton, US
• Eric J. Panken · Edina, US

Key dates

• Filing date: Apr 28, 2010
• Grant date: Oct 6, 2015
• Expiry date: Oct 1, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G16H20/30
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Techniques relate to operating a medical device by classifying a detected posture state of a patient. This classification may be performed by comparing the detected posture state to posture state definitions available within the system. Each definition may be described in terms of a parameter (e.g., vector) indicative of a direction in three-dimensional space. The posture state definitions may be calibrated by automatically estimating values for these parameters, thereby eliminating the need for the patient to assume each posture state during the calibration process to capture actual parameter values. According to another aspect, the estimated parameter values may be updated as the patient assumes various postures during a daily routine. For instance, estimated vectors initially used to calibrate the posture state definitions may be changed over time to more closely represent posture states the patient actually assumes, and to further adapt to changes in a patient's condition.