Wire Retention Unit for Electrosurgical Forceps
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Solution Overview
Problem
Existing electrosurgical forceps face challenges in maintaining optimal gap distance and pressure for effective tissue sealing, which can lead to short circuits or inadequate sealing, especially in large vessels, due to the complexity and cost of intricate wire routing designs in housing molds.
Innovation Solution
The design incorporates a wire retention unit with a backplate, wire clasps, and guide ribs to manage wire routing externally, simplifying the housing and reducing manufacturing costs while maintaining effective wire management and preventing arcing, and includes a clicker tab mechanism for tactile feedback during tissue grasping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intricate wire routing designs are used in housing molds, then wire management and arcing prevention are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The wire retention unit is divided into separate functional components including wire clasps for securing wires, guide ribs for routing wires along defined paths, and a backplate for structural support. This segmentation allows each component to be optimized independently and simplifies the overall housing mold design.
Solution Approach 2:
The wire retention unit acts as an intermediary component between the housing and the wires, providing a dedicated structure for wire management. This mediator approach separates the wire routing complexity from the housing mold, allowing the housing to be simpler while still achieving reliable wire management and arcing prevention.
2Reliability
If intricate wire routing designs are used in housing molds, then wire management and arcing prevention are improved, but manufacturing cost increases
Solution Approach 1:
By segmenting the wire retention features into separate components (wire clasps, guide ribs, backplate), the housing mold can be simpler and easier to manufacture. The wire retention unit can be produced as a separate assembly and attached to the housing, reducing overall manufacturing complexity and cost.
Solution Approach 2:
The complex wire routing features are extracted from the housing mold design and placed in a separate wire retention unit. This extraction allows the housing to be manufactured with a simpler, more cost-effective mold while the wire management functionality is provided by the separate unit.
3Stability of the object's composition
If the jaw members are held in fixed position, then structural stability is improved, but tactile feedback during tissue grasping is reduced
Solution Approach 1:
The jaw members are designed with controlled mobility, allowing them to move slightly within defined constraints during tissue grasping. This dynamic design provides tactile feedback to the operator through movement resistance and position changes, while still maintaining sufficient stability for effective tissue sealing.
Solution Approach 2:
The jaw members provide tactile feedback through their mechanical interaction with tissue during grasping. The controlled movement and resistance encountered by the operator serve as direct feedback about tissue engagement and sealing status, improving ease of operation while maintaining structural stability.
Data Source
AI summary
An electrosurgical instrument includes a housing including an elongated shaft. A stationary actuation member is axially disposed within the elongated shaft and includes a cam pin. An actuating mechanism is operably coupled to the elongated shaft and is moveable relative to the housing to selectively cause movement of the elongated shaft. An end effector includes a pair of opposing first and second jaw members operably coupled about a common pivot. One or both of the jaw members includes a camming slot configured to engage the cam pin. Each jaw member includes an electrically conductive tissue sealing surface adapted to connect to a source of electrosurgical energy. A knife blade is supported in the elongated shaft and moveable in a longitudinal direction to cut tissue disposed between the jaw members. A wire retention unit is supported within the housing and includes a plurality of wire clasps and a plurality of guide ribs configured to define at least one wire path.