Flexible Microwave Antenna Shaping for Endometrial Ablation
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Solution Overview
Problem
Current endometrial ablation devices are rigid and thick, causing patient discomfort during cervical dilation and failing to conform to irregularly shaped uterine cavities, leading to inadequate ablation zones.
Innovation Solution
The development of microwave antennas with a flexible radiating element and a shaping element that generates uniquely shaped microwave fields, allowing for a more conformable and effective ablation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid and thick shafts are used in endometrial ablation devices, then structural strength is improved, but patient discomfort increases and adaptability to irregular uterine cavities deteriorates
Solution Approach 1:
The patent employs flexible radiating elements and conformable antenna structures that can bend and adapt to the irregular geometry of the uterine cavity. The flexible shaft design allows the device to navigate cervical passages with minimal dilation while maintaining structural integrity through materials with appropriate flexural strength and memory properties.
Solution Approach 2:
The device transitions from a static rigid structure to a dynamic flexible structure that can change its configuration. The shaft and radiating elements are designed to be flexible during insertion but can be stabilized or positioned in specific configurations once deployed in the uterine cavity, allowing adaptation to different anatomical shapes.
2Ease of manufacture
If fixed-shaped antenna elements are used, then manufacturing simplicity is improved, but adaptability to complex three-dimensional endometrial shapes deteriorates
Solution Approach 1:
The antenna is divided into multiple discrete radiating elements that can be independently positioned and shaped. Each element can be configured to match specific portions of the uterine cavity geometry, allowing the overall structure to conform to complex three-dimensional shapes while maintaining relatively simple individual component manufacturing.
Solution Approach 2:
The device utilizes composite structures combining flexible substrates with conductive radiating elements. These composite materials allow the antenna to be manufactured with integrated shaping capabilities, where the substrate itself can be formed into complex geometries that match the target tissue surface.
3Adaptability or versatility
If flexible radiating elements are used, then adaptability to irregular uterine cavities is improved, but device complexity increases
Solution Approach 1:
The patent introduces intermediate structural components such as support ribs, mounting structures, and positioning mechanisms that mediate between the flexible radiating elements and the rigid device housing. These intermediaries allow the flexible elements to conform to tissue surfaces while maintaining electrical connectivity and mechanical stability without requiring complete redesign of the entire device architecture.
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 flexible microwave antennas reduce patient discomfort by minimizing the need for cervical dilation and effectively create ablation zones that match the complex shape of the endometrial layer, improving treatment outcomes.
Implementation Method 1
applying a microwave energy from a transmission line coupled to a power supply to produce a shaped microwave field
Implementation Method 2
the dielectric piece extending along an axis of the antenna
Data Source
AI summary
Microwave antennas and devices incorporating such antennas usable for performing procedures on or within a patient's body using a shaped microwave field.