Hemostatic Device Ductile Transition Region
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Solution Overview
Problem
Conventional hemostatic devices have limited flexibility and adaptability due to direct connections between band bodies and support members, making it difficult to accommodate varying limb sizes and shapes, and positions of puncture sites, resulting in reduced convenience and effectiveness.
Innovation Solution
The hemostatic device incorporates a cover member with a main body featuring a support member made of a harder material and a second region with higher ductility, allowing the band bodies to be adjusted and secured around the limb, and includes a pressing member to apply compressive force, ensuring proper fit and enhanced compression at the puncture site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each band body is directly connected to the support member, then the structure is simple and stable, but the movable range of band bodies near connection position is narrow and degree of freedom is limited
Solution Approach 1:
The main body is divided into a first region (support member region) and a second region (transition region), creating segmented zones with different material properties. This segmentation allows the band bodies to connect to the ductile second region rather than directly to the rigid support member, providing movable range and adjustment capability while maintaining structural stability.
Solution Approach 2:
Different regions of the main body are made from materials with different properties: the first region uses a hard material for stability, while the second region uses a ductile material for flexibility. This local quality differentiation enables the connection points to have the desired movability without compromising the overall structural integrity.
2Force
If the support member is made of hard material, then compressive force is effective, but flexibility and adaptability to varying limb sizes and shapes is reduced
Solution Approach 1:
The support member is made of hard material only in the first region where compressive force is needed at the puncture site. The second region is made of ductile material to provide flexibility for adapting to different limb sizes and shapes. This local quality differentiation resolves the contradiction between needing hard material for force application and flexible material for adaptability.
Solution Approach 2:
The main body is segmented into regions with different material properties: the first region (support member region) provides hard, stable compression, while the second region (transition region) provides ductile flexibility. This segmentation allows the device to simultaneously achieve effective compressive force and adaptability to varying limb characteristics.
3Reliability
If band bodies are wrapped around limb, then hemostasis is achieved, but positions may shift to proximal side of support member due to excessive movement
Solution Approach 1:
The second region is made of ductile material that allows controlled movement and adjustment of band body positions during wrapping, but the connection to the rigid first region (support member) prevents excessive movement. This local quality differentiation enables reliable hemostasis while maintaining position stability.
Solution Approach 2:
The segmented structure with ductile second region and rigid first region creates a system that permits necessary movement for proper band body positioning while the rigid support member anchors the structure to prevent proximal shifting, ensuring both hemostatic reliability and position stability.
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 design allows for improved flexibility and secure wrapping of band bodies around the limb, enhancing the compressive force applied to the puncture site, accommodating various limb sizes and shapes, and preventing excessive movement or shifting of the band bodies, thus effectively stopping bleeding.
Implementation Method 1
the support member is made of a material harder than the pressing member
Implementation Method 2
the second region is made of a material having higher ductility than the support member
Implementation Method 3
a pressing member disposed on the cover member and configured to compress the puncture site
Data Source
AI summary
A hemostatic device includes a main body including a support member disposed to overlap an inflatable member and made of a material harder than the inflatable member, the main body has a first region where the support member is located, and a second region located between the first region and each of a first band body, a second band body, and a third band body, the second region is made of a material having higher ductility than the support member, and a width of the second region located between the first region and the second band body and a width of the second region located between the first region and the third band body decrease from a distal side to a proximal side of the support member.