Dielectric Balloon Endometrial Ablation Vapor Management
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Solution Overview
Problem
Existing endometrial ablation methods using radiofrequency current face challenges such as slow treatment times, incomplete ablation, non-uniform depths, and risk of injury to adjacent organs, due to inefficiencies in energy transfer and vapor accumulation in the uterine cavity.
Innovation Solution
The method involves expanding a thin-wall dielectric structure within the uterus to apply radiofrequency energy through inductive coupling, with a vapor release mechanism that opens at a preselected pressure to prevent vapor accumulation, ensuring efficient energy transfer and minimizing tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radiofrequency ablation is applied using conventional electrodes, then endometrial tissue can be ablated, but treatment time is prolonged and ablation uniformity is poor
Solution Approach 1:
A dielectric balloon is introduced as an intermediary medium between the RF electrode and the endometrial tissue. The balloon is filled with a dielectric fluid that allows capacitive coupling of RF energy to the tissue, enabling more uniform and faster ablation compared to direct electrode contact methods
2Productivity
If higher radiofrequency energy is applied to speed up ablation, then treatment time is reduced, but risk of injury to adjacent organs increases
Solution Approach 1:
The dielectric balloon provides localized energy delivery by conforming to the uterine cavity shape and distributing RF energy uniformly across the endometrial surface. This localized and controlled energy delivery accelerates ablation while minimizing thermal spread to adjacent organs through the dielectric barrier
3Loss of energy
If vapor is not released during ablation, then energy transfer efficiency decreases, but system complexity increases with vapor management
Solution Approach 1:
Vapor extraction ports are incorporated into the dielectric balloon to actively remove vapor generated during RF ablation. This extraction mechanism prevents vapor accumulation that would insulate the tissue and reduce energy transfer efficiency, while integrating the function into the existing balloon structure rather than adding separate complex systems
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 approach allows for rapid, controlled, and uniform endometrial ablation with reduced risk of organ injury by efficiently managing vapor pressure and enhancing energy delivery across the uterine wall.
Implementation Method 1
applying energy across the wall of the structure into the uterine wall
Implementation Method 2
applying radiofrequency energy through inductive coupling
Implementation Method 3
releasing can be effected by inflating a barrier in a vapor release path between the uterine cavity and an exterior where the barrier is inflated at the desired release pressure
Implementation Method 4
generating a plasma in a low pressure gas within the structure and inductively coupling the energy across the dielectric wall
Implementation Method 5
inductively coupling the energy across the dielectric wall
Implementation Method 6
The exterior surface conforms to an inner wall of the uterus
Data Source
AI summary
A wall of a uterus is ablated by expanding a structure in the uterus and applying energy across the wall of the structure into the uterine wall. An exterior surface of the structure conforms to an inner wall of the uterus, and the energy may cause vapor to collect between the wall and the structure. The vapor is released by providing a barrier to release which is inflated at a pressure above which the barrier at least partially collapses to allow the vapor to leave the uterus.