Modular Coagulation Tool Unit for Robotic Surgical Integration
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Solution Overview
Problem
Existing coagulation and dissection instruments are not easily adaptable for use with surgical robots, requiring complex assembly and potential damage to electrical connections during use.
Innovation Solution
A modular tool unit with a coupling piece and two branches, each equipped with electrodes, where the branches are insulated and connected via flexible actuating elements and conductors, allowing easy attachment to surgical robots and reducing stress on electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional coagulation and dissection instrument is used, then the instrument can perform coagulation and cutting functions, but the instrument cannot be easily adapted for use with surgical robots
Solution Approach 1:
The instrument is divided into separate modular components: a tool unit with jaw section and electrodes, and a shaft assembly. This segmentation allows the tool unit to be easily attached to different shaft configurations for robotic use while maintaining the core coagulation and cutting functions.
Solution Approach 2:
The tool unit is designed with universal mounting features that enable it to be adapted to both traditional handheld instruments and robotic surgical systems. The coupling piece and connection mechanisms allow the same tool unit to interface with different actuation systems, providing multi-functionality across surgical platforms.
2Device complexity
If the instrument is designed for easy adaptation to surgical robots, then the assembly becomes simpler, but the electrical connections may be damaged during use
Solution Approach 1:
The electrical conductors are routed through the shaft assembly in a protected manner, with sufficient length and flexibility built in to accommodate robotic movement and positioning. This pre-planning of conductor routing and slack prevents damage during robotic manipulation while maintaining simple assembly.
Solution Approach 2:
The electrical conductors are designed with appropriate flexibility and routing channels that allow them to bend and move with the instrument during robotic use without breaking. The conductors are positioned to avoid stress concentration points while maintaining electrical connectivity.
3Reliability
If the branches are electrically insulated from each other, then the electrical connections become more reliable, but the manufacturing process becomes more complex
Solution Approach 1:
The jaw sections and coupling pieces utilize composite construction with electrically insulating materials positioned between conductive components. This integration of insulating and conductive elements into the structural design provides reliable electrical isolation while maintaining manufacturability through standard composite fabrication techniques.
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
Facilitates easy integration of coagulation and dissection instruments with surgical robots, ensuring reliable electrical connections and reducing mechanical stress on components, thereby enhancing instrument durability and usability.
Implementation Method 1
A hinge is provided for this purpose, with a hinge axis oriented transversely to the longitudinal direction of the branch.
Implementation Method 2
at least one actuating element, for example, a push and pull element, extends through the shaft to transmit an actuating movement to the movable branch(es)
Implementation Method 3
The electrodes are used to apply an electric current to the tissue held between them in order to induce coagulation or tissue fusion.
Data Source
Figure 1~3
Figure 4~7
AI summary
A tool unit (15) according to the invention has two branches (25, 27) that are electrically insulated from each other or made of insulating material, and on which coagulation electrodes (26, 28) are provided. While the first branch (25) is rigidly held on the tool unit, the second branch (27) is pivotable. To impart a pivoting movement to the second branch (27), an actuating element (30) in the form of a push-pull rod, for example in the form of a flexible sheet metal strip, is provided, which also serves as an electrical conductor to supply current to the second coagulation electrode (28). The first coagulation electrode (26) is connected to a supply wire (21) via a connecting element. The connecting element can be the branch (25) itself, an electrically conductive inlay provided in it, or a connecting wire. A second connecting wire (34) serves to contact the cutting electrode (33), that is, to supply current to it.