Bipolar Forceps Thermal Management via Zirconium Copper Alloy
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Solution Overview
Problem
Conventional bipolar forceps for electrosurgery face issues with thermal energy management, leading to tissue sticking and charring due to inadequate thermal transfer, and the use of non-stick materials increases manufacturing costs and complexity.
Innovation Solution
The bipolar forceps are designed with forceps arms made of a zirconium copper alloy that efficiently transfers thermal energy away from the conductor tips, maintaining their temperature below a designated threshold, and feature a silver alloy plating layer on the conductor tips to prevent tissue sticking, thereby reducing the risk of thermal damage to tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bipolar forceps are used with non-stick materials covering the electrodes, then tissue sticking is reduced, but manufacturing cost and complexity increase due to multiple plating steps
Solution Approach 1:
The patent removes the non-stick coating layer from the forceps design and instead uses a smooth, polished metal surface at the conductor tip. This extraction of the problematic coating step simplifies manufacturing while maintaining the non-stick function through surface geometry and material selection alone.
Solution Approach 2:
The forceps are designed as disposable single-use instruments. This eliminates the need for complex, multi-step plating processes that would be required for reusable instruments, as each disposable forceps can be manufactured with simpler, single-step processes and then discarded after use.
2Reliability
If conventional bipolar forceps are used with non-stick materials, then tissue sticking is reduced, but manufacturing cost increases
Solution Approach 1:
The patent removes the non-stick coating layer from the forceps design and instead uses a smooth, polished metal surface at the conductor tip. This extraction of the problematic coating step simplifies manufacturing while maintaining the non-stick function through surface geometry and material selection alone.
Solution Approach 2:
The forceps are designed as disposable single-use instruments. This eliminates the need for complex, multi-step plating processes that would be required for reusable instruments, as each disposable forceps can be manufactured with simpler, single-step processes and then discarded after use.
3Productivity
If bipolar forceps are used for extended procedures, then productivity is maintained, but thermal energy accumulates causing charring and sticking
Solution Approach 1:
The forceps arms are designed with different thermal properties at different locations: the conductor tips have high thermal conductivity to dissipate heat quickly, while the handle portions can be made of materials that provide good grip and insulation. This local differentiation of material properties allows extended use without thermal accumulation at the working end.
Solution Approach 2:
The forceps arms are designed with continuous thermal conduction paths from the conductor tips through the arms to the handles, allowing continuous heat dissipation throughout the procedure. This uninterrupted thermal management enables extended surgical procedures without thermal buildup.
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 effectively prevents tissue sticking and charring, enhances thermal management, and reduces manufacturing costs by eliminating the need for additional plating layers, while maintaining efficient coagulation of biological tissues.
Implementation Method 1
forceps arms made of a zirconium copper alloy that efficiently transfers thermal energy away from the conductor tips
Implementation Method 2
silver alloy plating layer on the conductor tips to prevent tissue sticking
Implementation Method 3
The flow of high-electrical current through the targeted area of biological tissue cuts and/or coagulates the tissue. During this process, thermal energy, such as heat, is created at the point of application
Data Source
AI summary
A surgical instrument for electrosurgery having a first forceps arm, a first forceps jaw of the first forceps arm, a first conductor tip of the first forceps arm, a second forceps arm disposed opposite the first forceps arm, a second forceps jaw of the second forceps arm, the second forceps jaw disposed opposite the first forceps jaw, a second conductor tip of the second forceps arm, and the second conductor tip disposed opposite the first conductor tip. The first forceps arm and the second forceps arm are configured to transfer thermal energy away from the first conductor tip and second conductor tip at a rate sufficient to maintain the thermal energy of the first conductor tip and second conductor tip below a designated thermal threshold. The first and second forceps arms being composed of a zirconium copper alloy.