Electroactive Polymer Mask Fit Adaptation for CPAP Seal Reliability
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Solution Overview
Problem
Conventional respiratory assistance systems, such as CPAP devices for treating sleep apnea, often fail to provide an effective seal due to poorly sized masks, leading to leaks, reduced treatment efficiency, skin irritation, and noise disturbances, as they do not adequately account for individual patient and environmental variables.
Innovation Solution
The use of shape-changing materials, like electroactive polymers (EAPs) and elastomers, which adjust size and shape in response to electrical stimulation, allowing for real-time adaptation of components like masks, straps, and conduits to improve fit and seal, and can be controlled based on patient breathing patterns and environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-size mask is used for CPAP treatment, then the device structure is simple and easy to manufacture, but the mask may not fit all patients properly leading to leaks and reduced treatment effectiveness
Solution Approach 1:
The mask incorporates shape-changing materials that can dynamically alter their physical configuration in response to patient characteristics. The mask frame or cushion can change shape to conform to different facial geometries, enabling a single mask design to adapt to multiple patient types without requiring multiple fixed-size options.
Solution Approach 2:
The mask utilizes materials whose physical parameters (such as shape, size, or stiffness) can be changed in response to environmental or patient-specific conditions. This allows the mask to modify its fitting characteristics based on detected patient parameters, achieving custom-fit adaptability from a standardized base design.
2Reliability
If a custom-made mask is created from a mold of the patient's face, then the mask fit and seal are improved, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
The mask system performs self-adjustment by detecting patient characteristics and automatically modifying its own shape or configuration to achieve optimal fit. This eliminates the need for external customization processes such as taking facial molds or manual adjustments by technicians, while still achieving custom-fit seal effectiveness.
Solution Approach 2:
The patent replaces traditional mechanical customization methods (molding, physical adjustment mechanisms) with shape-changing materials that respond to electrical or environmental stimuli. This substitution maintains custom-fit reliability while dramatically simplifying the manufacturing process to standardized production.
3Reliability
If the mask is tightly secured to prevent leaks, then the seal effectiveness is improved, but patient comfort decreases and skin irritation may occur
Solution Approach 1:
The mask employs shape-changing materials that can locally adjust their properties at different regions of the mask. Areas requiring secure attachment can dynamically increase grip or conform tightly, while areas contacting sensitive skin can maintain a gentler, more compliant profile, thus achieving reliable sealing without uniform tightness that causes irritation.
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 solution enhances the effectiveness of respiratory assistance by maintaining a secure seal, reducing noise, and improving patient comfort by dynamically adjusting to individual anatomical and environmental factors, thereby increasing treatment efficacy and reducing side effects.
Implementation Method 1
The shape changing material may be an electro active polymer (EAPs) or elastomer
Data Source
AI summary
A respiratory assistance component is disclosed that changes shape when an electrical charge is provided. The amount of electrical charge that is applied may be based on values, characteristics, or user controlled parameters of the respiratory assistance system. The component may be all or part of a patient interface, a tube, a flow generator, and/or a sleep mat.