Floating Electrode Assembly for Atrial Septum Cauterization
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Solution Overview
Problem
Existing medical devices face challenges in positioning the electrode portion close to the bottom of the recessed portion of the expansion body due to deformation during expansion and contraction, leading to incomplete cauterization of the through-hole in atrial septum treatments.
Innovation Solution
The medical device features an electrode assembly that is separate from the expansion body, allowing it to be positioned near the radially innermost bottom portion and is engaged with multiple engaging portions to prevent displacement and damage during expansion and contraction, ensuring effective cauterization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode portion is disposed at a position away from the bottom portion of the recessed portion to avoid deformation damage, then the electrode portion can be protected from damage during expansion and contraction, but the edge portion of the through-hole cannot be sufficiently heated and cauterized
Solution Approach 1:
The electrode assembly is designed with a flexible structure that includes curved portions corresponding to the proximal side curved portion and distal side curved portion of the expansion body. This dynamic design allows the electrode assembly to flex and adapt to the radial expansion and contraction of the expansion body without causing damage to the electrode portion, while still maintaining the electrode's proximity to the bottom portion of the recessed portion for effective cauterization.
2Manufacturing precision
If the electrode portion is disposed close to the bottom portion of the recessed portion to ensure sufficient heating and cauterization, then the cauterization quality improves, but the electrode portion becomes vulnerable to damage during expansion and contraction
Solution Approach 1:
The electrode assembly incorporates flexible curved portions that can bend and deform in response to the radial expansion and contraction of the expansion body. These flexible sections act as shock-absorbing elements that protect the electrode portion from mechanical damage while allowing the electrode to remain positioned close to the bottom portion of the recessed portion for effective cauterization of the through-hole edge.
3Manufacturing precision
If the electrode portion is fixed to the curved portions of the expansion body, then the electrode portion can be positioned close to the bottom portion, but the electrode portion may be damaged due to deformation during expansion and contraction
Solution Approach 1:
Instead of rigidly fixing the electrode portion to the curved portions of the expansion body, the design employs a flexible electrode assembly that can dynamically adapt to the expansion and contraction movements. The curved portions of the electrode assembly are designed to flex in coordination with the expansion body's deformation, maintaining accurate positioning near the bottom of the recessed portion while avoiding mechanical damage through controlled flexibility.
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 electrode assembly remains fixed and functional near the bottom portion, ensuring complete cauterization of the through-hole, maintaining a desired size, and preventing damage from deformation, thus enhancing treatment efficacy.
Implementation Method 1
when high frequency energy is applied from the electrode portion to the through-hole
Data Source
AI summary
A medical device includes an expansion body, an elongated shaft portion, and a plurality of electrode assemblies. The expansion body includes a recessed portion that is recessed radially inward. The recessed portion includes a radially innermost bottom portion including a proximal side curved portion and a distal side curved portion, a proximal side upright portion, and a distal side upright portion. Each of the plurality of electrode assemblies includes an electrode portion disposed along the expansion body from the proximal side upright portion or the distal side upright portion to the bottom portion so as to face a receiving space defined by the recessed portion. The proximal side curved portion and the distal side curved portion deform in response to expansion and contraction of the expansion body. The electrode portion is in a floating state with respect to the distal side curved portion and the proximal side curved portion.