Microporous Blood Pressure Cuff Liner
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Solution Overview
Problem
Blood pressure cuffs commonly cause cross-contamination and skin degradation due to direct contact with patients, and existing disposable liners can be expensive and interfere with blood pressure readings.
Innovation Solution
A protective liner with multiple layers, including a woven fabric and a porous polymeric film, designed to wick moisture away from the skin and provide a microporous microbial barrier while allowing pulse detection without interfering with blood pressure measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a disposable liner with thick absorbent layer is used, then cross-contamination is reduced, but blood pressure reading accuracy is interfered with
Solution Approach 1:
The patent employs a microporous membrane as the core component of the liner. This membrane has controlled pore sizes that allow water vapor transmission for breathability while blocking microbial passage for infection prevention. The microporous structure provides the necessary protection without requiring thick absorbent layers that would interfere with pulse detection and blood pressure measurements.
Solution Approach 2:
The liner is constructed as a composite structure combining multiple functional layers: a microporous membrane for microbial barrier and vapor transmission, hydrophobic fabric for moisture wicking, and soft fabric for skin comfort. This composite approach integrates multiple functions in a thin profile, achieving cross-contamination prevention without compromising measurement accuracy.
2Object-affected harmful factors
If the liner is made breathable and permeable to water vapor, then skin degradation is prevented, but microbial barrier effectiveness may be reduced
Solution Approach 1:
The microporous membrane features carefully controlled pore dimensions that exploit size-based filtration. The pores are sized to permit passage of water vapor molecules for breathability and moisture management, while being sufficiently small to block larger microbial entities such as bacteria and viruses, thus maintaining effective microbial barrier properties.
Solution Approach 2:
Different regions of the liner have different material properties optimized for specific functions. The microporous membrane provides selective permeability for vapor versus microbes, while hydrophobic zones wick moisture away from the skin surface. This local differentiation of material qualities enables simultaneous achievement of skin protection and microbial barrier effectiveness.
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 effectively prevents cross-contamination and skin degradation while allowing accurate blood pressure readings, as it is breathable and permeable to water vapor but impermeable to microbes, and can be reused multiple times with a common blood pressure cuff.
Implementation Method 1
a second layer of material joined to the first layer of material and formed of a porous polymeric film having pores therethrough configured to permit passage of water vapor therethrough while substantially preventing passage of microbes therethrough
Implementation Method 2
The protective liner is porous and sufficiently thin so that the protective liner will not substantially interfere with detection of a person's pulse through the protective liner and a blood pressure cuff
Data Source
AI summary
A protective liner for use with a blood pressure measuring cuff includes three layers of material configured to protect a person's skin, wick moisture away from the person's skin, and provide a moisture permeable, microporous barrier to microbes. The protective liner is porous and sufficiently thin so that the protective liner will not substantially interfere with blood pressure monitoring through the protective liner. The three layers of material are configured to wick moisture therethrough away from the person's skin, while substantially preventing passage of microbes therethrough.