Arterial Pressure Bandage with Roller Hull and Cushion
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Solution Overview
Problem
Existing pressure bandages for arteries often fail to ensure rapid closure of arterial punctures without compromising blood supply to the extremities, potentially leading to numbness due to insufficient pressure distribution.
Innovation Solution
A pressure bandage with an eyelet on the bandage section to guide the closure means over a roller-shaped pressure body, ensuring high pressure on the puncture site while distributing force through a cushion to prevent excessive constriction of other blood vessels, and a pad extending beyond the pressure area to maintain blood supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high pressure is applied to the arterial puncture to ensure rapid closure, then the artery closes quickly, but the general blood supply to the forearm may be cut off causing numbness
Solution Approach 1:
The pressure body is designed to concentrate force locally at the puncture site while the cushion distributes this force over a broader area. This creates a gradient of pressure intensity - high at the puncture for effective closure, gradually decreasing towards the extremities to maintain blood flow. The structural transition from concentrated pressure body to distributed cushion resolves the contradiction between localized effectiveness and global safety.
Solution Approach 2:
The pressure bandage is segmented into distinct functional zones: the pressure body for concentrated arterial compression, the cushion for force distribution, and the bandage section for securing. This segmentation allows each component to perform its specific function optimally - the pressure body ensures reliable puncture closure while the cushion prevents harmful blood supply obstruction by distributing the load.
2Reliability
If the pressure body is positioned precisely over the artery to ensure effective closure, then the puncture closes reliably, but positioning accuracy becomes difficult to achieve
Solution Approach 1:
The cushion is designed with larger dimensions than the pressure body and extends beyond its boundaries. This beforehand cushioning compensates for positioning inaccuracies - even if the pressure body is not perfectly centered on the artery, the cushion ensures adequate force distribution and maintains effective pressure on the arterial puncture, thereby preserving closure reliability despite variations in positioning precision.
3Reliability
If the bandage is made taut to exert sufficient pressure on the puncture, then closure effectiveness increases, but the risk of cutting off blood supply to the hand increases
Solution Approach 1:
The pressure distribution is transitioned from a one-dimensional concentrated force to a two-dimensional distributed force field through the cushion. By expanding the pressure application into additional spatial dimensions, the same tightening force produces a broader area of lower intensity pressure, maintaining puncture closure effectiveness while reducing the harmful concentration of force that would otherwise obstruct blood supply to the extremities.
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 solution effectively closes the arterial puncture with high pressure while ensuring minimal risk of numbness by distributing force and maintaining blood supply, even if the pressure bandage is applied slightly off-center.
Implementation Method 1
creates a relatively high point pressure on the Puncture exerted in the artery, but with the force being distributed through the cushion under the pressure hull on either side of the pressure hull
Implementation Method 2
a bandage section 2 made of an elastically flexible material
Data Source
Figure 1
AI summary
The pressure bandage (1) has a bandage section (2) formed of an elastic material, where one end of the bandage section has a cushion. The cushion exhibits a pressure hull (6) arranged over the cushion. The other end of the bandage section has a fastening unit. The bandage section has a lug (8) within the area of the pressure hull for pulling the other end of the bandage section with fastening unit. The lug is arranged at the bandage section in such a manner that the bandage of the bandages section is guided over the pressure hull in closed condition.