Hemostatic Device With Auxiliary Balloon For Ulnar Artery Pressure Control
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Solution Overview
Problem
Existing hemostatic devices for punctured sites, particularly those involving radial and ulnar arteries, face challenges in maintaining effective blood flow and preventing discomfort or pain due to the inflatable portions' tendency to deform and press unintended areas, such as tendons or nerves, leading to reduced hemostatic efficiency and prolonged healing times.
Innovation Solution
A hemostatic device featuring a flexible band wrapped around the arm with a first inflatable member for the radial artery and a second inflatable member for the ulnar artery, along with an auxiliary balloon to adjust the pressing direction of the second inflatable member, ensuring targeted pressure and minimizing discomfort by preventing excessive blood flow to the ulnar artery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only the radial artery is pressed for hemostasis, then hemostasis at the puncture site is achieved, but blood flow rate of the radial artery decreases excessively and the ulnar artery blood flow rate increases excessively
Solution Approach 1:
The hemostatic device applies different pressing forces to different locations: the first inflatable member presses the radial artery at the puncture site with higher force to achieve hemostasis, while the second inflatable member presses the ulnar artery with controlled force to prevent excessive blood flow redistribution, thereby addressing the local quality imbalance in blood flow distribution
2Productivity
If the inflatable portion on the ulnar artery side is made flexible to prevent excessive blood flow increase, then blood flow distribution is improved, but the inflatable portion deforms under external force and presses unintended areas such as tendons and nerves
Solution Approach 1:
The device divides the pressing function into two separate inflatable members: the first inflatable member for radial artery compression and the second inflatable member for ulnar artery compression. This segmentation allows independent control of each pressing action, preventing the deformation and unintended pressure issues that would occur with a single flexible inflatable portion
3Productivity
If the second inflatable member is added to press the ulnar artery, then excessive blood flow increase is prevented, but the device complexity increases
Solution Approach 1:
The device combines two inflatable members with different pressing characteristics into a single integrated hemostatic device structure. The first inflatable member provides strong pressing for radial artery hemostasis, while the second inflatable member provides controlled pressing for ulnar artery blood flow management. This merging allows both functions to work together within one device, managing blood flow distribution without requiring separate devices
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
This configuration enhances hemostatic efficiency by maintaining radial artery blood flow, reduces discomfort by avoiding pressure on unintended areas, and shortens the hemostasis time by ensuring precise pressure application on the ulnar artery.
Implementation Method 1
expandable upon being inflated in response to introducing fluid into an interior of the first inflatable member to press a part of the radial artery
Implementation Method 2
expandable upon being inflated in response to introducing fluid into an interior of the second inflatable member
Implementation Method 3
expandable upon being inflated in response to introducing fluid into an interior of the auxiliary balloon and is disposed between the flexible band and the second inflatable member to press the second inflatable member
Data Source
AI summary
A hemostatic device includes a flexible band configured to be wrapped around a part of an arm to be subjected to hemostasis in which a radial artery and an ulnar artery are disposed, a securing portion that secures the band in a state of being wrapped around the arm, a first inflatable portion connected to the band to press a part to be subjected to hemostasis located in the radial artery by being inflated in response to injection of a fluid, a second inflatable portion disposed at a different position from the position of the first inflatable portion in the longitudinal direction of the band to press the ulnar artery by being inflated in response to injection of a fluid, and an auxiliary balloon disposed between the band and the second inflatable portion such that at least a portion overlaps the second inflatable portion and presses the second inflatable portion.