Chest Wall Acceleration Sensing for Timed Respiratory Stimulation
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Solution Overview
Problem
Existing treatments for sleep disordered breathing, such as external breathing therapy devices and surgical interventions, often fail to effectively manage the condition.
Innovation Solution
The use of implantable and external acceleration sensors to detect respiratory phases through rotational movements of the chest wall, combined with control algorithms to identify inspiratory and expiratory phases, allowing for synchronized delivery of therapeutic stimulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external breathing therapy devices and surgical interventions are used to treat sleep disordered breathing, then treatment coverage is provided, but treatment effectiveness is insufficient
Solution Approach 1:
The patent implements a closed-loop feedback system where acceleration sensors continuously monitor chest wall motion to detect respiratory phases, and this information feeds back to control the timing and delivery of therapeutic stimulation, enabling adaptive adjustment of treatment based on real-time respiratory status
Solution Approach 2:
The system uses the patient's own respiratory movements to generate the control signals for therapy delivery, where the natural chest wall acceleration during breathing serves as both the diagnostic marker and the trigger for therapeutic intervention, eliminating the need for external monitoring equipment
2Reliability
If acceleration sensors are used to detect respiratory phases, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential feature needed for respiratory detection - chest wall acceleration - and uses a single acceleration sensor to capture this information, eliminating the need for complex multi-sensor arrays or sophisticated imaging systems while maintaining high detection reliability
Solution Approach 2:
The acceleration sensor serves multiple functions: it detects respiratory phase timing, determines respiratory rate, and provides signals for triggering therapeutic stimulation, allowing one simple sensor to replace what would traditionally require multiple specialized monitoring devices
3Measurement precision
If traditional breathing therapy devices are used, then treatment is provided, but timing precision for therapeutic stimulation is insufficient
Solution Approach 1:
The system continuously monitors and pre-identifies the timing of respiratory phases in advance, so that when a therapeutic intervention is needed, the stimulation can be delivered at the precise optimal moment without waiting for signal processing delays, achieving both high precision and rapid response
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
This method provides reliable and efficient detection of respiratory phases, enabling timely and adaptive therapeutic interventions for sleep disordered breathing without requiring convergence over multiple breaths, and is robust to variations in signal magnitude and posture.
Implementation Method 1
the sensor signal comprises an acceleration signal from the acceleration sensor, the method comprises determining respiration information via the acceleration signal
Data Source
Figure 1A~1B
Figure 2~4
Figure 5A
AI summary
A device includes a sensor and a control portion. The sensor is securable to a patient to provide a sensor signal. The sensor is to sense changes in acceleration indicative of respiration of the patient. The control portion is to determine a midpoint of each respiratory phase of the patient based on the sensor signal.