Wearable Pulse Oximeter with Motion Artifact Filtering
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Solution Overview
Problem
Current pulse oximeter systems lack the ability to provide timely alerts for significant decreases in oxygen levels and abnormal heart rate changes in infants, who may not adequately respond to inadequate oxygen and excessive carbon dioxide levels, necessitating caregiver intervention.
Innovation Solution
The development of pulse oximeter systems that include a wearable device with a sensor and transmitter to monitor oxygen levels and heart rate, and a remote monitor device that compares detected values to established thresholds, providing alerts via various means when oxygen levels decrease by more than 5% or heart rates deviate from set thresholds, and incorporating additional sensors for motion and environmental data to differentiate between motion-induced and actual physiological changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pulse oximeter systems continuously monitor oxygen levels and heart rate, then safety and reliability are improved, but device complexity and energy consumption increase
Solution Approach 1:
The system is divided into separate functional modules: a wearable device with sensors for monitoring, a processor for analyzing data, and an alert mechanism for notifications. This segmentation allows each component to be optimized independently while maintaining overall system reliability without excessive complexity.
Solution Approach 2:
The system automatically monitors physiological parameters, compares readings against threshold values, and triggers alerts without requiring continuous manual intervention. The processor autonomously determines when alerts should be generated based on pre-set criteria, reducing the need for complex user interface controls.
2Loss of time
If pulse oximeter systems provide immediate alerts for oxygen level decreases, then response time is improved, but false alarms from motion artifacts increase
Solution Approach 1:
The system incorporates motion sensors that provide feedback about the infant's movement state. This feedback is used by the processor to distinguish between motion-induced signal variations and actual physiological changes, allowing the system to maintain rapid response times while reducing false alarms caused by motion artifacts.
Solution Approach 2:
Motion sensors act as intermediary devices that detect movement and provide additional context to the oxygen level measurements. By introducing this intermediary sensing mechanism, the system can filter out motion-related false positives while maintaining sensitivity to genuine oxygen level changes.
3Measurement precision
If pulse oximeter systems use multiple sensors for motion and environmental data, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The wearable device integrates multiple sensors that serve multiple functions: motion sensors detect both movement artifacts and sleep patterns, while environmental sensors monitor both temperature and humidity. This multi-functionality allows the system to achieve high measurement precision across different parameters without proportionally increasing device complexity.
Solution Approach 2:
Multiple sensing functions are combined into a single integrated wearable device platform. The processor consolidates data from various sensors and applies unified analysis algorithms, allowing the system to achieve high measurement precision while managing complexity through integrated design rather than separate independent systems.
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
Enables immediate and appropriate alerts to caregivers when an infant's oxygen levels or heart rates indicate potential distress, ensuring timely intervention and improving safety by differentiating between normal and abnormal physiological changes.
Implementation Method 1
a sensor for detecting an oxygen level and/or a heart rate of the user
Data Source
AI summary
Pulse oximeter systems are described that detect an oxygen level of a user and/or monitor a user's heart rate. The pulse oximeter systems are configured to provide an alert when a user's detected oxygen level decreases below an established oxygen level, and/or when a user's heart rate decreases below a lower threshold value and/or increases above an upper threshold value. For example, an alert may be provided when a user's detected oxygen level decreases by more than about five percent (5%) of an established oxygen level. In some instances, an operator can set a level at which an alert will be provided.