Blood Pressure Cuff With Recess Positioning Aid
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Solution Overview
Problem
Current blood pressure measurement cuffs often slip during application, leading to inaccurate positioning of the bladder over the brachial artery, resulting in unreliable blood pressure readings, especially for untrained users.
Innovation Solution
A wrap-around cuff with a positioning aid featuring a recess on the lower edge region and a shell element that provides a preformed curvature, along with an orientation area and reading markings, to ensure correct placement and prevent slipping, and a pressure hose connected to a device for fluid introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cuff is made expandable to adapt to different arm circumferences, then the ease of operation is improved, but the positioning precision deteriorates due to slipping
Solution Approach 1:
The recess is pre-formed in the positioning aid at a specific location that corresponds to the correct bladder position. When the user pulls the end section to expand the cuff, the recess automatically engages with the protrusion on the arm, preliminarily establishing the correct position before the bladder is inflated. This preliminary positioning action prevents slipping and ensures accurate placement.
Solution Approach 2:
The recess-protrusion combination acts as an intermediary mechanism between the user's action of expanding the cuff and the final positioning of the bladder. This intermediary structure translates the user's pulling motion into precise positioning, mediating between the expandable nature of the cuff and the requirement for accurate placement.
2Ease of operation
If the pressure hose is arranged on the outside for visibility, then the ease of operation is improved, but the reliability deteriorates due to incorrect bladder positioning
Solution Approach 1:
The positioning aid with the recess performs the positioning function automatically without requiring user intervention or visual verification. The recess-protrusion mechanism self-adjusts to the correct position when the cuff is expanded, making the system self-servicing in terms of positioning. This eliminates the need for the pressure hose to provide visual guidance, while ensuring reliable positioning.
3Ease of operation
If the cuff allows free expansion for user comfort, then the ease of operation is improved, but the positioning precision deteriorates due to longitudinal slipping
Solution Approach 1:
The recess is located at a specific local position on the positioning aid that corresponds to the optimal bladder placement over the brachial artery. This local feature provides targeted positioning control at the critical area while allowing the rest of the cuff to expand freely for user comfort. The local quality of the recess position ensures precision where needed without restricting overall cuff expandability.
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 cuff's design ensures accurate and reproducible blood pressure measurements by reducing the risk of slipping and providing clear application guidance, improving user experience and measurement reliability.
Implementation Method 1
an expandable bladder which can be connected, preferably via a pressure hose, to a device for introducing a fluid into the bladder
Data Source
Figure 1a~1b
Figure 1c~2a
Figure 2b~3d
AI summary
The cuff (10) has an end section (6) attached to a longitudinal section (7) in a longitudinal direction (1). A blister region (15) is provided with a blister (16). The longitudinal section is provided with an upper edge region (9) and a lower edge region (8). The longitudinal section includes a positioning aid (13) at the lower edge region, where the aid includes an opening (14) that is applied at an inner region of a crook of an arm of user. The opening includes a spacing of preferably maximum 3 cm from a lower blister region edge (17) in a transverse direction (2).