Prostate Vapor Needle Control Using Impedance Capsule Detection
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Solution Overview
Problem
Existing focal therapy treatments for prostate cancer, such as RF ablation, often fail to confine the treatment to the peripheral zone of the prostate, risking damage to adjacent tissues.
Innovation Solution
A prostate treatment device with a therapy needle and sensors that detect prostate tissue parameters, particularly electrical impedance, to automatically stop advancement when the prostatic capsule is reached, ensuring precise delivery of vapor for localized ablation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RF ablation energy is used for focal therapy, then cancer treatment is achieved, but the treatment cannot be confined to the peripheral zone tissue and may damage adjacent tissues
Solution Approach 1:
The patent employs real-time feedback through impedance sensors that continuously monitor tissue electrical impedance during needle advancement. When the sensor detects the characteristic impedance signature of the prostatic capsule, the system provides immediate feedback to stop needle advancement, ensuring treatment confinement to the peripheral zone and preventing damage to adjacent tissues.
Solution Approach 2:
The patent replaces traditional mechanical stopping methods (relying on physician skill and anatomical knowledge) with an electronic sensing and control system. The impedance-based detection system automatically identifies the prostatic capsule boundary and triggers needle retraction or advancement cessation, substituting mechanical judgment with precise electrical measurement and automated control.
2Ease of operation
If manual needle advancement is used, then the procedure is simple, but the needle may penetrate the prostatic capsule and treat wrong tissue zones
Solution Approach 1:
The system enables self-service operation where the needle advancement process automatically monitors its own position and detects tissue boundaries through integrated impedance sensors. The system self-regulates by automatically stopping advancement when the prostatic capsule is detected, eliminating the need for external monitoring while maintaining operational simplicity.
Solution Approach 2:
The patent substitutes manual mechanical judgment with automated electronic detection. The impedance sensing system continuously measures tissue electrical properties during advancement, automatically identifying the prostatic capsule boundary and triggering precise needle retraction or cessation of advancement, thereby achieving high positioning accuracy without complex manual techniques.
3Manufacturing precision
If real-time impedance sensing is implemented, then treatment precision is improved, but device complexity increases
Solution Approach 1:
The impedance sensing system serves multiple functions: it detects the prostatic capsule boundary, monitors needle advancement through tissue, and provides real-time feedback for treatment localization. This multi-functional approach consolidates what could be separate complex systems into a single integrated sensor platform, improving treatment precision while managing device complexity through functional integration.
Solution Approach 2:
The electrical impedance acts as an intermediary parameter that translates complex tissue boundary detection into a measurable electrical signal. Rather than directly imaging or mechanically detecting the prostatic capsule, the system uses impedance changes as an intermediate indicator, simplifying the detection mechanism while maintaining high localization accuracy.
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
Enables safe and effective ablation of peripheral zone prostate tissue without damaging the central or transitional zones, using vapor therapy with real-time tracking and control to prevent capsule penetration.
Implementation Method 1
at least one sensor disposed on a distal portion of the therapy needle, the at least one sensor being configured to sense a parameter of one or more tissues of the prostate... the parameter comprises an electrical impedance of one or more tissues of the prostate
Implementation Method 2
the therapy needle is configured to deliver vapor into the prostate... delivering vapor from the therapy needle into the prostate
Data Source
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AI summary
A vapor delivery system is provided that may include any of a number of features. One feature of the vapor delivery system is that it can apply condensable vapor energy to tissue, such as a prostrate, to shrink, damage, or denature the prostate. In some embodiments, the vapor delivery system can include safety features including prostate capsule detection, needle tracking, and treatment tracking. Methods for safe and effective treatment of prostate tissues are presented.