Motor-Driven Electrosurgical Resecting Device with Digital Controller
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electrosurgical cutting devices face challenges in visualizing and immobilizing target tissue, especially in minimally invasive procedures like transurethral resection of the prostate, due to limited access and field of view, making it difficult to control tissue resection, RF power application, and vacuum aspiration.
Innovation Solution
A motor-driven electrosurgical tissue resecting device with a shaft assembly and electrode configured to move relative to a tissue-receiving window, controlled by a digital controller that coordinates motor-driven movements with RF power and vacuum aspiration, enhancing visibility and control during tissue resection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual engagement of cutting window against target tissue is used, then device simplicity is maintained, but control precision and coordination of cutting power and vacuum aspiration deteriorates
Solution Approach 1:
The patent replaces manual mechanical engagement of the cutting window against tissue with a motor-driven reciprocating mechanism. The motor automatically positions and moves the cutting window relative to the tissue, eliminating the need for manual manipulation while improving control precision and coordination of cutting and aspiration functions.
2Measurement precision
If blind advancement of introducer device is used, then procedure simplicity is maintained, but tissue visualization and engagement accuracy deteriorates
Solution Approach 1:
The patent introduces an endoscope as an intermediary device that provides visual feedback during the advancement and operation of the resecting device. The endoscope allows the operator to visualize the target tissue and the cutting window engagement in real-time, improving positioning accuracy without requiring complex imaging integration into the resecting device itself.
3Productivity
If motor-driven electrode movement is added to RF cutting, then cutting precision and coordination improve, but device complexity and cost increase
Solution Approach 1:
The patent combines the RF electrode and cutting window into a single integrated assembly that is reciprocated by a motor-driven mechanism. This merging of functions allows coordinated control of cutting, coagulation, and tissue aspiration through automated reciprocating motion, improving cutting efficiency and precision while sharing the motor mechanism across multiple functions.
Solution Approach 2:
The patent implements dynamic reciprocating motion of the electrode through motor-driven actuation. The electrode automatically moves back and forth relative to the tissue during the procedure, enabling continuous cutting and coagulation action that improves productivity compared to static electrode positions requiring manual manipulation.
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 solution provides improved control over tissue resection, allowing for precise cutting and coagulation, enhanced visibility through endoscopic visualization, and efficient tissue removal, addressing the limitations of manual control and coordination in existing devices.
Implementation Method 1
A radio frequency (RF) electrode is adapted to move across the window to resect and coagulate tissue
Implementation Method 2
A negative pressure source is coupled to the window to draw tissue into contact with the window and to remove resected tissue
Data Source
AI summary
A medical introducer includes an elongated tubular member having a proximal end, a distal portion, and a central lumen extending from the proximal end to a distal port in the distal portion. A frame structure is coupled to the distal portion of the elongated tubular member, where frame structure supports the distal portion of the elongated tubular member in a tapered shape and alternatively in a non-tapered shape. The elongated tubular member may include a rigid outer tube and a rigid inner tube carried in an interior lumen of the outer tube. The distal portion is typically a reinforced elastomeric tubular extension of the outer tube, and the reinforced elastomeric tubular extension may have a conical shape.