Ambulatory Blood Pressure Cuff With Elastic Liner for Slip Resistance
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Solution Overview
Problem
Existing ambulatory blood pressure monitor cuffs cause discomfort due to tight fastening, leading to poor circulation, swelling, bruising, and cross-infection risks, while also being prone to slippage and perspiration-related issues during long-term use.
Innovation Solution
A blood pressure cuff design featuring an elastic liner connected to the cuff, which tightens around the arm to prevent slippage and provides comfort, combined with a velcro connection for secure fastening, allowing the cuff to remain loose and reducing restraint, while improving hygiene by being disposable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the cuff is fastened tightly to prevent slippage, then measurement accuracy is improved, but blood circulation is compromised and causes discomfort
Solution Approach 1:
The cuff is divided into two functional segments: an elastic liner that provides tight contact for accurate measurement and a loose outer cuff that prevents circulation restriction. The liner is made of elastic material that can deform to fit the arm tightly, while the outer cuff remains loose to maintain blood flow.
Solution Approach 2:
The elastic liner acts as an intermediary between the outer cuff and the arm. It transmits the necessary pressure for accurate measurement while its elastic properties allow it to conform to the arm shape without causing circulation restriction, thus mediating between measurement accuracy and circulation preservation.
2Object-affected harmful factors
If the cuff is fastened loosely to improve comfort, then blood circulation is maintained, but the cuff may fall or shift leading to measurement failure
Solution Approach 1:
The cuff system is segmented into a tight-fitting elastic liner and a loose outer cuff. The liner ensures reliable contact with the arm for consistent measurements, while the outer cuff provides comfort and prevents circulation issues.
Solution Approach 2:
The elastic liner and outer cuff are merged into a single integrated cuff assembly. The liner is inserted inside the outer cuff, creating a combined structure that simultaneously achieves tight contact for measurement reliability and loose fit for comfort.
3Productivity
If the same cuff is used by multiple patients, then resource utilization is improved, but cross-infection risk increases
Solution Approach 1:
The elastic liner is designed as a disposable component that is discarded after single use. This eliminates cross-infection risk between patients while maintaining cost-effectiveness. The liner can be easily replaced without affecting the overall cuff functionality.
Solution Approach 2:
The cuff is segmented into a reusable outer cuff and a disposable elastic liner. This segmentation allows the expensive outer cuff to be reused across multiple patients while the disposable liner ensures hygiene by being discarded after single use.
4Duration of action of moving object
If the cuff is worn for extended periods, then monitoring completeness is improved, but hygiene deteriorates due to perspiration
Solution Approach 1:
The elastic liner is designed as a disposable component that prevents hygiene deterioration during extended wear. After each use, the liner is discarded, eliminating the accumulation of perspiration and odor that would occur with reusable liners worn for 24 hours or more.
Solution Approach 2:
The disposable liner is discarded after single use, and the outer cuff is recovered and reused. This approach maintains hygiene during extended monitoring periods while maximizing the utilization of the more durable outer cuff component.
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 elastic liner ensures the cuff stays in place without constriction, reducing discomfort and infection risks, maintaining comfort and hygiene during extended wear, and preventing swelling and bruising.
Implementation Method 1
the liner has an elastic deformation and consequently tightens around the target position
Implementation Method 2
the first fixed part and the second fixed part can form velcro or other hook and loop connection
Data Source
AI summary
A blood pressure cuff assembly for an ambulatory blood pressure monitor may include a hollow cuff and an elastic liner provided on the reverse side of the cuff. An airbag may be provided in the cuff. A first connection part and a second connection part may be provided on the cuff. A third connection part and a fourth connection part may be correspondingly provided on the liner. The effect of tight inside and loose outside is achieved by the combination of the elastic liner and the cuff. When worn on an upper arm, the elastic liner has an elastic deformation and consequently tightens around the upper arm so as to realize certain slip resistance, and the cuff will not slip down even tied a bit loosely when located on the upper arm. The feeling of constraint from the cuff is reduced significantly and the comfort is improved.