Patient Sensor System for Orientation Detection and Fall Prevention
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Solution Overview
Problem
Current systems for monitoring patient turning and preventing pressure ulcers are inefficient due to low caregiver compliance, difficulty in monitoring patient position, and inadequate detection of bed exits and falls, particularly in elderly patients with mobility issues, leading to increased healthcare costs and risk of injury.
Innovation Solution
A lightweight multi-function sensor system that includes a multi-axis accelerometer, magnetometer, and altimeter, communicating with a network of receivers to monitor patient orientation, position, and movements, providing real-time data for caregivers to optimize turning schedules and detect potential bed exits and falls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual patient turning protocols are implemented, then pressure ulcer prevention is addressed, but caregiver compliance remains low and monitoring accuracy is insufficient
Solution Approach 1:
The system enables automated self-monitoring of patient position and automatic detection of turning events without requiring continuous caregiver intervention. The sensor system autonomously tracks patient orientation and generates alerts when turning is needed, allowing the patient monitoring function to serve itself rather than relying entirely on manual caregiver compliance.
Solution Approach 2:
The system provides real-time feedback to caregivers through alerts and notifications when patients require turning. The feedback loop includes continuous monitoring of patient position, automatic detection of prolonged static positioning, and timely notifications to caregivers, creating a closed-loop system that improves compliance through actionable information rather than relying solely on manual protocol adherence.
2Measurement precision
If continuous patient monitoring is implemented, then detection accuracy improves, but system complexity and cost increase
Solution Approach 1:
The patent extracts only the essential monitoring functions needed for pressure ulcer prevention—specifically, detection of patient orientation and turning events—rather than implementing comprehensive continuous monitoring of all patient parameters. This selective extraction of critical functions maintains detection accuracy for pressure ulcer risk while avoiding the complexity and cost of monitoring unrelated physiological parameters.
Solution Approach 2:
The sensor system is designed to perform multiple functions including position monitoring, turning detection, fall detection, and alert generation through a single integrated device. This multi-functionality consolidates what would otherwise require multiple separate systems into one unit, maintaining high measurement precision while reducing overall system complexity.
3Difficulty of detecting and measuring
If automated sensor systems are deployed, then detection capability improves, but false alarms and patient discomfort may increase
Solution Approach 1:
The system detects preliminary movements and intermediate states that precede complete bed exits or falls. By identifying early warning signs such as partial lifting or edge positioning, the system can provide advance alerts without requiring the patient to complete the full exit or fall action, thereby improving detection capability while reducing false alarms from normal movements.
Solution Approach 2:
The monitoring system dynamically adjusts its detection thresholds and sensitivity based on patient-specific factors and movement patterns. Rather than using fixed rigid thresholds that cause false alarms, the system adapts its detection criteria to distinguish between normal patient movements and concerning events, reducing false alarms while maintaining high detection capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sensor system improves caregiver compliance and reduces the risk of pressure ulcers and falls by providing accurate and timely data for patient care, enabling automated care recommendations and reducing healthcare costs by focusing attention on patients who need it most.
Implementation Method 1
A lightweight multi-function sensor system that includes a multi-axis accelerometer
Implementation Method 2
magnetometer, and altimeter
Implementation Method 3
A lightweight multi-function sensor system that includes a multi-axis accelerometer, magnetometer, and altimeter
Data Source
AI summary
Methods, systems and devices for monitoring patient orientation, direction, altitude and location to determine the need for turns as well as to detect impending or actual bed exits or falls. A patient-worn sensor communicates with at least one host server through a mesh network of relay antennae to provide data representative of various patient characteristics. The sensor comprises one or more of an accelerometer, a magnetometer and an altimeter, along with optional other sensors. Various user interfaces are provided for managing patient care using the information developed by algorithms processed at the server based on data received from the patient sensors.