Flat Blood Vessel Dissecting Device for Minimally Invasive Graft Harvesting
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Solution Overview
Problem
Existing blood vessel dissecting devices, such as those described in U.S. Application Publication No. 2006/0276815, face challenges with guide wire damage to the internal wall of the blood vessel and poor workability during vein graft harvesting, particularly with vein grafts used as bypass vessels in coronary artery bypass grafting.
Innovation Solution
A blood vessel dissecting device comprising a dissecting device with a flat-shaped cross-section and a cutting device, both designed to be inserted along the longitudinal extent of the blood vessel, allowing for precise dissection and cutting of surrounding tissue while minimizing damage to the blood vessel, with the dissecting device being wider than the blood vessel and the cutting device equipped with a bipolar structure for thermal coagulation and branch vessel stanching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide wire is inserted into the blood vessel to guide the tubular member for harvesting, then the blood vessel can be harvested with surrounding tissue, but the guide wire may damage the internal wall of the blood vessel and workability is poor
Solution Approach 1:
A flat-shaped dissecting device is introduced as an intermediary tool between the surgeon and the blood vessel. This device includes a flat blade that can dissect tissue including the blood vessel and surrounding tissue, allowing the blood vessel to be harvested with its surrounding tissue intact while avoiding direct contact and damage from guide wires or other intrusive instruments.
Solution Approach 2:
The invention extracts and removes the harmful guide wire from the procedure. Instead of using a guide wire to navigate and harvest the blood vessel, the flat-shaped dissecting device directly dissects and separates the blood vessel with surrounding tissue from the body, eliminating the source of internal wall damage.
2Productivity
If conventional dissection methods are used, then the blood vessel can be harvested, but the workability and smoothness of dissection is poor
Solution Approach 1:
The flat-shaped dissecting device has a blade with a specific flat cross-section design that is optimized for dissecting tissue planes. The flat shape allows the blade to slide smoothly between tissue layers, providing excellent workability and control during the dissection process while maintaining the integrity of the blood vessel and surrounding tissue.
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 enables smooth and minimally invasive dissection of blood vessels, reducing bleeding and damage, and enhances the long-term patency rate of vein grafts by maintaining them covered with surrounding tissue during harvesting.
Implementation Method 1
a treating section adapted to cut and stanch a branch vessel branched from the blood vessel
Data Source
AI summary
A blood vessel dissecting device includes: a dissecting device which, when inserted into a living body along a blood vessel, dissects tissue in a direction of alignment of the dissecting device with the blood vessel; and a cutting device which, when inserted into the living body along the blood vessel, cuts tissue surrounding the blood vessel in a direction of alignment of the cutting device with the blood vessel. A blood vessel dissecting method includes: inserting a dissecting device into a living body along a blood vessel so as to dissect tissue in a direction of alignment of the dissecting device with the blood vessel; and inserting a cutting device into the living body along the blood vessel while guiding the cutting device with the dissecting device so as to cut tissue surrounding the blood vessel in a direction of alignment of the cutting device with the blood vessel.