Absorbent Liner for CPAP Mask Seal Integrity and Skin Comfort
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Solution Overview
Problem
Current CPAP masks are uncomfortable and lead to high patient discontinuation due to air leaks, sweating, and pressure marks, especially for users with dry skin, as they are made from impermeable materials that block pores and require avoidance of skin creams.
Innovation Solution
A liner made from absorbent materials, such as cotton or silicone with embedded cotton, positioned between the CPAP mask and the face to absorb moisture, reduce air leaks, and maintain mask positioning, allowing for comfortable use with skin creams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mask is made from impermeable materials (silicone, rubber, vinyl, nylon-based fabric), then the mask structure integrity and seal are improved, but the comfort deteriorates due to blocked pores, sweating, and pressure marks
Solution Approach 1:
The mask system is divided into two functional layers: an inner liner layer in contact with the skin and an outer mask structure. The liner layer is made from breathable, porous material that provides comfort, while the outer mask maintains the seal integrity. This segmentation allows each layer to perform its specific function without compromising the other.
Solution Approach 2:
The mask system uses composite material construction with the liner layer made from breathable materials such as cotton, silk, or porous foam, combined with the outer impermeable mask structure. This composite approach allows the system to simultaneously achieve skin comfort through the porous inner layer and effective sealing through the outer layer.
2Reliability
If the mask material directly contacts the skin, then the mask fit and seal are improved, but the adaptability deteriorates for users who need to use skin creams
Solution Approach 1:
The liner layer acts as an intermediary between the skin and the mask. It provides a barrier that allows users to apply skin creams directly to the skin without the cream interfering with the mask seal or material. The liner maintains direct contact with the skin for proper fit while preventing direct interaction between the mask material and skin creams.
3Ease of manufacture
If the mask is made from water and gas impermeable materials, then the mask durability and ease of cleaning are improved, but the comfort deteriorates due to blocked pores and sweating
Solution Approach 1:
The mask system separates the functions of sealing and breathing. The outer impermeable mask structure provides durability and ease of cleaning, while the inner liner layer made from breathable, porous material allows sweat vapor to escape and pores to remain open. This segmentation resolves the contradiction between ease of cleaning and comfort.
Solution Approach 2:
The liner layer is constructed from porous materials such as cotton, silk, or porous foam that allow moisture vapor transmission while maintaining comfort. These porous materials enable breathability and sweat evaporation, directly addressing the discomfort caused by impermeable materials while the outer mask retains its impermeable properties for easy cleaning.
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 liner significantly reduces air leaks, maintains mask positioning, and allows for the use of skin creams, enhancing comfort and compliance with CPAP therapy by acting as a 'second skin' without altering the mask's fit or causing pressure marks.
Implementation Method 1
the liner 10 may be constructed from an absorbent material, such as cotton
Data Source
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AI summary
A liner for use with a respiratory mask having a face-engaging portion having nasal pillows is provided, where the liner includes a body constructed from an absorbent material, the body having a first set of apertures and a second set of apertures spaced from the first set of apertures. The first set of apertures receives the nasal pillows, and the second set of apertures is aligned with the nasal pillows when the liner is in a folded configuration.