Bipolar Forceps Medial Conductor Tips for Neurosurgery

Solution Overview

Problem

Bipolar forceps used in neurosurgical procedures face challenges in minimizing unintended thermal and current spread, which can lead to post-surgical deficits such as intelligence, memory, and movement issues due to unintended damage to brain tissue.

Innovation Solution

The design of bipolar forceps with conductor tips that conduct current only at the medial portion and are coated with materials of high electrical resistivity, reducing thermal and current spread by limiting the conductive surface area and using a mechanism to control the distance between forceps arms for precise tissue engagement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If bipolar forceps are used to apply current to target tissue, then surgical procedure can be performed, but unintended thermal and current spread damages non-target brain tissue

Engineering Contradiction:

Improveprecision of current applicationVSAvoidthermal and current spread

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The forceps arm is designed with differentiated electrical conductivity: the distal end (conductor tip) is made electrically conductive to apply current to target tissue, while the proximal end is made electrically insulating to prevent current spread. This local quality differentiation allows the same component to serve dual functions - current application at the tip and current isolation along the arm - thereby resolving the contradiction between achieving surgical effect and preventing harmful thermal spread.

Inventive Principle:

Principle #3Local quality

2Productivity

If current is applied to target tissue, then electrosurgical procedure is effective, but brain tissue damage causes post-surgical deficits

Engineering Contradiction:

Improvesurgical procedure effectivenessVSAvoidtissue damage

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The forceps arm is designed with differentiated electrical conductivity: the distal end (conductor tip) is made electrically conductive to apply current to target tissue, while the proximal end is made electrically insulating to prevent current spread. This local quality differentiation allows the same component to serve dual functions - current application at the tip and current isolation along the arm - thereby resolving the contradiction between achieving surgical effect and preventing harmful thermal spread.

Inventive Principle:

Principle #3Local quality

3Power

If conductor tips conduct current over large surface area, then current application is effective, but thermal spread increases

Engineering Contradiction:

Improvecurrent conduction capabilityVSAvoidthermal spread

Core Design Contradiction:

PowerVSTemperature

Solution Approach 1:

The conductor tip is designed with selective conductivity - the medial portion remains conductive for effective current application, while lateral portions are coated with electrically insulating material. This concentrates current flow through a smaller, controlled surface area at the tip, reducing thermal spread while maintaining surgical effectiveness.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The forceps arm combines materials with different electrical conductivity properties - the distal end uses electrically conductive material for current application, while the proximal end uses electrically insulating material to prevent current spread. This composite material approach allows the single component to achieve both current conduction and thermal isolation functions simultaneously.

Inventive Principle:

Principle #40Composite materials

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 reduces unintended thermal and current spread during electrosurgical procedures, minimizing tissue damage and improving surgical precision, thereby reducing the risk of post-surgical complications.

Implementation Method 1

coated with materials of high electrical resistivity, reducing thermal and current spread by limiting the conductive surface area

Methodology Applied

Scientific EffectElectrical resistivity: Electrical Resistance

Implementation Method 2

conductor tips that conduct current only at the medial portion

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS20160081734A1Bipolar forceps

Publication Date: 2016.03.24 KOGENT SURGICAL LLC

AI summary

A bipolar forceps may include a first forceps arm having a first forceps arm aperture, a first forceps jaw, and a first forceps arm conductor tip; a second forceps arm having a second forceps arm aperture, a second forceps jaw, and a second forceps arm conductor tip; and an input conductor isolation mechanism having a first forceps arm housing and a second forceps arm housing. The first forceps arm conductor tip may be configured to conduct current only at a medial portion of the first forceps arm. Illustratively, the second forceps arm conductor tip may be configured to conduct current only at a medial portion of the second forceps arm.