Biopsy Forceps Faraday Cage Microwave Coagulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing biopsy forceps tools face challenges in effectively coagulating bleeding surfaces after tissue sample collection, particularly in minimizing thermal effects on the sample and ensuring efficient delivery of microwave energy for coagulation.
Innovation Solution
A biopsy forceps tool equipped with a coaxial cable for microwave energy transmission, featuring electrically conductive jaws that form a Faraday cage to isolate the sample from thermal effects, with a thermal insulation layer and optimized shell thickness to prevent microwave penetration into the enclosed volume, allowing for controlled coagulation of the bleeding surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microwave energy is delivered to coagulate the bleeding surface, then coagulation effectiveness is improved, but thermal damage to the tissue sample increases
Solution Approach 1:
The device segments the functional zones by creating a physical barrier (Faraday cage) that separates the microwave energy delivery path from the tissue sample containment space, allowing coagulation to occur at the bleeding surface while protecting the enclosed sample from thermal exposure
Solution Approach 2:
The Faraday cage acts as an intermediary barrier between the microwave energy source and the tissue sample, allowing electromagnetic energy to pass through while blocking thermal conduction and direct microwave penetration to the sample
2Use of energy by moving object
If the jaw assembly is made electrically conductive to deliver microwave energy, then energy delivery efficiency is improved, but thermal conduction to the sample increases
Solution Approach 1:
The jaw assembly has different properties at different locations: the outer surface is electrically conductive for microwave coupling, while the inner surface is thermally insulating to protect the sample, creating localized functional differentiation
Solution Approach 2:
The jaw assembly uses composite construction combining electrically conductive materials (for microwave coupling) with thermally insulating materials (to protect the sample), achieving both energy delivery efficiency and thermal protection
3Object-affected harmful factors
If the shell thickness is increased to prevent microwave penetration, then sample protection is improved, but device complexity increases
Solution Approach 1:
The optimal shell thickness is calculated based on the microwave frequency and material properties, using the skin depth parameter to determine the minimum thickness required for effective shielding, rather than using excessive thickness
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
The tool enables safe and efficient removal of tissue samples by protecting the sample from thermal effects while effectively coagulating the bleeding surface, ensuring minimal sample damage and efficient energy delivery.
Implementation Method 1
the electrically conductive shells form a Faraday cage around the internal volume when in the closed position
Implementation Method 2
a coaxial cable for conveying microwave energy
Implementation Method 3
microwave energy is used to coagulate bleeding after a biological tissue sample is collected
Data Source
AI summary
A biopsy forceps tool (preferably for endoscopic use) in which microwave energy is used to coagulate bleeding after a biological tissue sample is collected between a pair of jaws. The pair of jaws define an enclosure that is isolated from the microwave energy itself and insulated from any thermal changes that occur due to application of the microwave energy. The tool comprises a pair of jaws connected to a coaxial cable, each of the pair of jaws comprising an electrically conductive shell, the jaw assembly being movable between a closed position in which the electrically conductive shells enclose an internal volume for holding a tissue sample and an open position in which the internal volume is exposed in order to receive the tissue sample. The electrically conductive shells form a Faraday cage around the internal volume when in the closed position.