Hemostatic Device Convex Inflation Segmentation
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Solution Overview
Problem
Existing hemostatic devices cause pain and numbness due to continuous compression of blood vessels and nerves, as they apply uniform pressure to puncture sites, leading to a trade-off between effective hemostasis and discomfort.
Innovation Solution
A hemostatic device with a flexible band, a securing portion, and an inflation portion featuring convex portions that apply dispersed pressure along the width direction, aligned with the blood vessel, to minimize stress on the puncture site and prevent excessive compression of non-target areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform pressure is applied to the puncture site for effective hemostasis, then hemostatic performance is improved, but pain and numbness increase due to continuous compression of blood vessels and nerves
Solution Approach 1:
The inflation portion is divided into multiple independent convex portions (first, second, third convex portions) that can be inflated to different degrees. This segmentation allows different compression forces to be applied to different regions along the blood vessel, enabling effective hemostasis at the puncture site while reducing compression on surrounding nerves and blood vessels to minimize pain and numbness.
Solution Approach 2:
Different convex portions are designed with different inflation capacities and compression characteristics. The convex portions adjacent to the puncture site can be inflated to higher pressures for effective hemostasis, while convex portions farther away are inflated to lower pressures or not at all, creating a gradient of compression that reduces harmful effects on surrounding tissues.
2Reliability
If continuous compression is applied to the puncture site, then hemostasis is maintained, but the blood vessel may be occluded and nerves compressed causing numbness
Solution Approach 1:
The compression force is segmented into multiple convex portions that can be independently controlled. This allows the blood vessel to be compressed sufficiently for hemostasis while distributing the compression load, preventing complete occlusion and reducing nerve compression that causes numbness.
Solution Approach 2:
The inflation portion allows for dynamic adjustment of compression force. The operator can inflate different convex portions to different degrees and can deflate them at different rates, enabling dynamic control of compression to maintain hemostasis while periodically relieving pressure to prevent occlusion and nerve damage.
3Reliability
If high compression force is applied to ensure hemostasis, then bleeding control is improved, but discomfort and pain increase
Solution Approach 1:
The high compression force needed for hemostasis is applied only to specific convex portions located at or near the puncture site, while other convex portions apply lower forces or no force. This segmentation concentrates the high compression where bleeding control is critical while minimizing discomfort in surrounding areas.
Solution Approach 2:
Different regions of the inflation portion are designed with different compression characteristics. The convex portions at the puncture site are designed to withstand and apply high compression forces for effective bleeding control, while convex portions in non-critical areas apply gentler compression to reduce pain and discomfort.
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 device achieves effective hemostasis while reducing pain by distributing compressive force across multiple locations along the blood vessel, preventing excessive pressure on nerves and other blood vessels, thus enhancing hemostatic performance and reducing discomfort.
Implementation Method 1
the inflation portion applies dispersed pressure to the puncture site and minimizes stress on a punctured wound
Data Source
AI summary
A hemostatic device has a flexible band that can be wrapped around a hemostasis-requiring site of a limb, a securing portion that secures the band in a state where the band is wrapped around the limb, and an inflation portion that interlocks with the band, and that inflates when a fluid is injected. The inflation portion has a plurality of convex portions in a width direction orthogonal to a longitudinal direction of the band when the inflation portion inflates.