Blood Vessel Dissecting Device with Dual Blades and Branch Vessel Confinement
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Solution Overview
Problem
Existing blood vessel dissecting devices face challenges in effectively harvesting vein grafts with surrounding tissue, leading to poor workability and potential damage to the internal wall of the blood vessel, which affects the long-term patency rate of vein grafts used in vascular bypass grafting.
Innovation Solution
A blood vessel dissecting device and method that employs two dissecting devices inserted along the blood vessel, with a branch vessel held between them, allowing for precise treatment and minimization of damage through an inserting and passing section, and the use of electrodes for electric field application to facilitate dissection and cauterization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide wire is inserted into a blood vessel to harvest a vein graft with surrounding tissue, then the vein graft can be harvested in the state of being covered with surrounding tissue, but the guide wire may damage the internal wall of the blood vessel being harvested
Solution Approach 1:
The dissecting device is divided into multiple functional sections including a dissecting section with dissecting blades, a protecting section with protecting blades, and an inserting section. This segmentation allows the device to separate the functions of tissue dissection and vessel protection, enabling the harvesting of vein grafts with surrounding tissue while preventing damage to the internal wall through the protective blades that prevent excessive dissection depth.
2Reliability
If a guide wire is used to guide the tubular member for vein graft harvesting, then the blood vessel can be harvested with surrounding tissue, but the workability in blood vessel harvesting can be poor
Solution Approach 1:
The dissecting device integrates multiple functions into a single instrument: it can dissect tissue, protect the blood vessel wall, guide itself along the blood vessel using the inserting section, and harvest the vein graft with surrounding tissue. This multi-functionality eliminates the need for separate guide wires and multiple instruments, significantly improving workability while maintaining the ability to harvest vein grafts with surrounding tissue for long-term patency.
3Ease of manufacture
If dissecting blades are used to dissect tissue along the blood vessel, then surrounding tissue can be removed, but there is a risk of excessive dissection depth damaging the blood vessel
Solution Approach 1:
The protecting blades serve as an intermediary element between the dissecting blades and the blood vessel wall. The protecting blades are positioned to prevent the dissecting blades from penetrating too deeply, thereby mediating the dissection process to achieve efficient tissue removal while preventing damage to the blood vessel internal wall.
Solution Approach 2:
The protecting blades are pre-positioned in the device structure before the dissection process begins. This preliminary arrangement ensures that the maximum dissection depth is limited from the start, preventing excessive penetration into the blood vessel wall while allowing efficient tissue dissection by the dissecting blades.
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 enhances the workability of vein graft harvesting, reduces the risk of damage to the blood vessel, and improves the long-term patency rate of vein grafts by allowing for precise treatment and secure handling of branch vessels, thereby facilitating the use of vein grafts as effective bypass vessels.
Implementation Method 1
at least one of the first dissecting device and the second dissecting device includes an electrode for applying an electric field to the branch vessel
Data Source
AI summary
A blood vessel dissecting device is disclosed, which includes at least two dissecting devices, which are inserted into a living body along a blood vessel to dissect tissue in a direction of alignment thereof with the blood vessel. The at least two dissecting devices include a first dissecting device and a second dissecting device. The first dissecting device and the second dissecting device are disposed juxtaposedly in the living body, and a branch vessel branched from the blood vessel is located between the first dissecting device and the second dissecting device.