Powered Bipolar Resectoscope with Motor-Driven Movable Electrode
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Solution Overview
Problem
Conventional resectoscopes face challenges in efficiently and precisely resecting tissue during surgical procedures due to limitations in electrode movement and energy control, which can lead to incomplete tissue removal and increased surgical time.
Innovation Solution
A powered bipolar resectoscope with a movable electrode and spacer assembly that moves between two positions, allowing for both longitudinal and transverse movement relative to a fixed electrode, coupled with a drive assembly and motor system to control electrode position and energy delivery, enabling precise tissue resection and efficient tissue removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional resectoscopes use manual electrode manipulation, then the device structure remains simple, but tissue resection precision and efficiency are insufficient
Solution Approach 1:
The patent implements a motor-driven movable electrode that can dynamically adjust its position between retracted and advanced states, enabling precise tissue resection. The electrode assembly includes a motor, drive mechanism, and movable electrode that can be positioned with control, transforming the static manual manipulation system into a dynamic automated system that improves resection precision while managing device complexity through functional integration.
Solution Approach 2:
The patent replaces the manual mechanical manipulation system with an automated motor-driven system. The motor assembly and drive mechanism substitute for hand-operated controls, providing more precise and consistent electrode positioning. This substitution enables better control over tissue resection while reducing operator fatigue and improving procedural efficiency.
2Productivity
If conventional resectoscopes use basic electrode movement, then the device is easy to operate, but surgical time increases due to incomplete tissue removal
Solution Approach 1:
The motor-driven movable electrode enables dynamic positioning between retracted and advanced states, allowing the electrode to be precisely positioned for tissue resection and then retracted for removal of resected tissue. This dynamic capability improves tissue removal efficiency by enabling complete resection while maintaining ease of operation through automated motor control that reduces the skill threshold for effective electrode manipulation.
Solution Approach 2:
The patent enables continuous tissue resection by maintaining the electrode in an advanced position during resection and automatically retracting only when needed for tissue removal. This continuous action approach maximizes productivity by minimizing idle time between resection steps while the automated motor system handles the complexity of timing and positioning, keeping the interface simple for the operator.
3Manufacturing precision
If the movable electrode is always advanced for resection, then tissue resection efficiency improves, but the risk of tissue damage and incomplete removal increases
Solution Approach 1:
The motor-driven movable electrode dynamically adjusts between advanced and retracted positions based on procedural needs. During tissue resection, the electrode is advanced to ensure complete removal; during tissue removal, it is retracted to prevent damage. This dynamic positioning controlled by the motor system achieves complete tissue resection while minimizing harmful effects through automated timing and positioning that reduces operator error.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor electrode position and tissue resection progress. The motor controller receives feedback from position sensors and operational status to automatically adjust electrode positioning, ensuring the electrode is advanced only when needed for resection and retracted when tissue removal is required. This feedback control prevents tissue damage while maintaining complete resection effectiveness.
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 enables precise and efficient tissue resection by allowing the movable electrode to move transversely and longitudinally, improving tissue removal efficiency and reducing surgical time through controlled energy delivery.
Implementation Method 1
The longitudinal sections are resiliently biased towards the fixed electrode, thereby biasing the movable electrode transversely towards the fixed electrode
Implementation Method 2
a motor configured to drive rotation of the lead screw
Implementation Method 3
a lead screw defining a helical track and a collar disposed about the lead screw and operably coupled to the helical track such that rotation of the lead screw translates the collar about the lead screw
Implementation Method 4
The fixed electrode is adapted to connect to a first electrical potential and the movable electrode is adapted to connect to a second electrical potential
Data Source
AI summary
An electrosurgical system includes a resectoscope and a generator. The resectoscope includes a fixed electrode, a movable electrode movable relative to the fixed electrode, and first and second switches actuated in first and second positions of the movable electrode, respectively. The generator is configured to supply energy to the fixed electrode and/or the movable electrode when the movable electrode is moving from the first position to the second position and to inhibit the supply of energy when the movable electrode is moving from the second position to the first position. The generator is configured to determine a direction of movement of the movable electrode based upon signals received from the first and second switches.