Insulating Boot for Electrosurgical Forceps Jaws
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Solution Overview
Problem
Existing electrosurgical forceps lack effective insulation around pivot elements and conductive shafts, leading to potential stray electrical energy transmission to patients during procedures, particularly in endoscopic surgeries where smaller cannulas pose design challenges.
Innovation Solution
A flexible insulating boot is applied to the exterior of jaw members and the pivot, secured by retention elements such as weather strip-like interfaces, elastic rings, or overmolded insulative materials to prevent electrical conduction and facilitate safe tissue sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing electrosurgical forceps are used without insulation around pivot elements, then the device structure remains simple and manufacturing is easier, but stray electrical energy is transmitted to patients causing safety hazards
Solution Approach 1:
A flexible insulating boot is disposed over the pivot element and conductive shaft portions. The boot is made of flexible insulating material that conforms to the underlying components while providing electrical insulation. This flexible shell approach protects patients from stray electrical energy without requiring complex rigid insulation structures, thus improving safety while maintaining relatively simple device construction.
Solution Approach 2:
The insulating boot acts as an intermediary element between the conductive components (jaw members, pivot, shaft) and the patient's body. This intermediate insulating layer blocks the transmission of stray electrical energy to the patient while allowing the electrosurgical instrument to function normally, effectively mediating the interaction between the electrical system and the biological tissue.
2Object-affected harmful factors
If a flexible insulating boot is added to cover pivot elements and conductive shafts, then patient safety is improved by reducing stray current, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The insulating boot is pre-formed as a complete assembly that can be slipped over the conductive components before final assembly. The boot includes pre-positioned retention elements and is shaped to accommodate the pivot element and shaft portions in advance, eliminating the need for complex step-by-step insulation application during manufacturing and reducing assembly complexity.
Solution Approach 2:
The insulating boot is combined with retention elements (such as elastic rings or adhesive layers) to create an integrated assembly that simultaneously provides both insulation and secure attachment. This merging of functions reduces the number of separate components and assembly steps, making manufacturing easier while maintaining effective insulation.
3Stability of the object's composition
If retention elements are used to secure the insulating boot, then the insulation remains stable during jaw movement, but the device structure becomes more complex
Solution Approach 1:
The retention elements are designed to automatically secure the insulating boot in place through self-adjusting mechanisms. For example, elastic rings exert continuous radial pressure to hold the boot firmly, or adhesive layers provide automatic bonding upon contact, eliminating the need for additional active retention mechanisms and reducing overall device complexity while maintaining stable insulation during jaw movement.
Data Source
AI summary
An electrosurgical forceps includes a shaft having a pair of jaw members at a distal end movable about a pivot from a first position disposed in spaced relation relative to one another to a second position wherein the jaw members are closer to one another for grasping tissue. A movable handle actuates a drive assembly to move the jaw members relative to one another. One (or both) of the jaw members is adapted to connect to a source of electrosurgical energy such that the jaw members are capable of conducting electrical energy to tissue held therebetween. A flexible insulating boot is disposed on an exterior surface of one or both jaw members and about the pivot and at least one retention element is configured to operably couple to both a proximal end of the jaw members and a distal end of the flexible insulating boot.