Expandable Headgear Web for Respiratory Interface Stability
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Solution Overview
Problem
Existing headgear for respiratory interfaces, such as those used in CPAP and NIV treatments, often compromise patient comfort due to overtightening, leading to discomfort and reduced compliance, as they struggle to balance seal stability and comfort, especially when patients change positions, causing gas leakage and discomfort.
Innovation Solution
The headgear features a positioning web with varying pathway portions that are expandable and contractible, allowing for adjustable tension distribution to maintain the respiratory interface in place while minimizing discomfort, using a tension line system that counteracts external forces and adapts to different head positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the headgear is tightened to maintain seal stability and prevent gas leakage, then the interface stability is improved, but patient comfort deteriorates due to excessive pressure
Solution Approach 1:
The headgear employs expandable and contractible positioning webs that can dynamically adjust their circumference. The positioning webs transition from an expanded state during donning/doffing to a contracted state during use, allowing the headgear to adapt to head shape changes and maintain optimal sealing pressure without causing discomfort. This dynamic adjustment resolves the contradiction between maintaining seal stability and ensuring patient comfort.
Solution Approach 2:
The headgear utilizes material elasticity and geometric configuration changes to adjust the positioning web circumference. The positioning webs are designed with specific elastic properties and initial expansion ratios that allow them to contract to the appropriate size for secure sealing while maintaining comfortable pressure distribution. This parameter change approach enables the system to optimize both interface stability and patient comfort simultaneously.
2Reliability
If the headgear is made secure to prevent interface displacement during position changes, then the seal stability is improved, but the ease of operation deteriorates due to difficulty in donning and doffing
Solution Approach 1:
The positioning webs are designed to be expandable during donning and doffing operations, allowing easy placement and removal of the headgear. Once secured, the same webs contract to maintain a firm, comfortable fit that prevents interface displacement during position changes. This dynamic behavior resolves the contradiction between ease of operation during donning/doffing and seal stability during use.
Solution Approach 2:
The positioning webs are pre-expanded to a larger circumference before donning, facilitating easy placement over the patient's head. After the headgear is positioned, the webs automatically contract to the appropriate size to secure the interface firmly. This preliminary expansion action enables easy donning while ensuring secure sealing afterward.
3Manufacturing precision
If the headgear uses fixed tension to maintain interface position, then the manufacturing precision is improved, but the adaptability deteriorates when patients change positions
Solution Approach 1:
The headgear employs positioning webs with elastic properties that allow dynamic adaptation to position changes. The webs can expand and contract in response to head shape changes and positioning variations, maintaining precise interface positioning accuracy while adapting to different patient positions (supine, lateral, prone). This dynamic elasticity resolves the contradiction between manufacturing precision and adaptability.
Solution Approach 2:
The positioning webs utilize material elasticity and geometric flexibility to change their configuration in response to position changes. The webs can alter their circumference and shape to accommodate different head positions while maintaining consistent interface sealing and positioning. This parameter change capability enables both precise manufacturing and high adaptability to position variations.
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 design enhances patient comfort and interface stability, reducing gas leakage and ensuring effective treatment delivery regardless of the patient's position, by distributing forces evenly and maintaining a secure seal without excessive pressure.
Implementation Method 1
the positioning web is expandable and contractible between an operative configuration when fitted to the user and an expanded configuration to facilitate donning and doffing of the headgear respectively
Data Source
AI summary
Headgear that secures a respiratory interface to the head of a patient. The respiratory interface may be used to treat obstructive respiration diseases or sleep apnoea. The headgear comprises a positioning web having a height and a length that extends at least partly about the head of a user when the headgear is fitted to the user. The positioning web includes at least one pathway for at least one tension line. Furthermore, the positioning web maintains the positioning of the one or more pathways about the head of the user and the positioning web is expandable and contractible between an operative configuration when fitted to the user and an expanded configuration to facilitate donning and doffing of the headgear respectively.