Bipolar Electrosurgical Probe With Reciprocating Electrodes to Limit Arcing
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Solution Overview
Problem
Existing surgical instruments for endoscopic cutting and removal of bone and soft tissue face challenges in reducing electrical arcing during tissue resection and lack the capability for efficient coagulation and fluid removal.
Innovation Solution
The development of an electrosurgical device with a bipolar electrode pair that reciprocates rapidly near a distal edge, allowing for controlled tissue cutting and coagulation, combined with a reusable handpiece and disposable probe for vacuum aspiration and RF delivery, suitable for sensitive environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thin distal edge cutting profile is used with a monopolar electrosurgical device, then tissue cutting precision and manipulation capability are improved, but electrical arcing occurs due to incomplete circuit
Solution Approach 1:
The patent employs dynamic reciprocating movement of bipolar electrodes at high speed (2,500-30,000 RPM) to alternately establish and break electrical contact with tissue. This dynamic configuration allows the thin distal edge profile to maintain precise cutting capability while preventing sustained electrical arcing through rapid on-off cycling of the electrical circuit.
Solution Approach 2:
The patent changes the electrical configuration parameter from monopolar to bipolar arrangement. By positioning both electrodes adjacent to the distal edge on opposite sides, the system transforms the incomplete circuit problem into a controlled bipolar configuration where current flows through tissue between the two closely spaced electrodes, eliminating arcing while maintaining cutting precision.
2Productivity
If rotational cutting surfaces are used for endoscopic tissue removal, then tissue removal capability is achieved, but cutting speed and efficiency are insufficient
Solution Approach 1:
The patent replaces the traditional mechanical rotational cutting system with an electrosurgical system that uses electrical energy for tissue cutting. The bipolar electrodes deliver RF current to cut tissue through thermal effects, achieving faster cutting speeds and improved efficiency compared to mechanical shavers and burrs.
Solution Approach 2:
The patent utilizes periodic reciprocating motion of the bipolar electrodes to deliver pulsed electrical energy to the tissue. This periodic action at high frequency enables continuous cutting while allowing thermal diffusion between pulses, improving cutting speed and efficiency without excessive heat buildup.
3Adaptability or versatility
If monopolar RF current delivery is used from handpiece to probe, then coagulation and ablation functions are achieved, but electrical arcing occurs in sensitive environments
Solution Approach 1:
The patent changes the electrical configuration from monopolar to bipolar delivery system. By placing both electrodes at the distal end of the probe adjacent to the cutting edge, the system confines current flow to a localized path through the tissue between electrodes, eliminating the need for distant return pads and preventing electrical arcing in sensitive neurological and cardiac environments.
Solution Approach 2:
The bipolar electrode configuration acts as an intermediary that confines electrical current flow to a controlled path through the tissue. This localized current delivery mechanism serves as a safe intermediary between the RF power source and sensitive tissues, enabling coagulation and ablation functions without the harmful arcing associated with monopolar systems.
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 device significantly reduces electrical arcing, enhances tissue manipulation, and enables efficient coagulation and fluid removal, making it suitable for neurological and cardiac applications.
Implementation Method 1
the pair of electrodes are reciprocated in a rapid manner (e.g., between 2,500 to 30,000 RPM, inclusive)... such that the first of the pair of electrodes can be extended distally beyond the distal edge or distal point while the second of the pair of electrodes can be retracted proximally of the distal edge or distal point
Implementation Method 2
a tip having a sharp at a distal most end thereof... provides that the apparatuses and systems are tissue sparing and that they have better manipulation capability for controlled cutting of tissue
Implementation Method 3
fluid removal... vacuum aspiration of fluids including tissue debris and smoke through a probe shaft
Data Source
AI summary
An electrosurgical device for treating tissue have a sharp forming a distal end thereof. The electrosurgical device can include two or more electrodes spaced from the sharp that can each reciprocate. Other arrangements for the two or more electrodes such as those that do not reciprocate but are held stator relative to the sharp are contemplated.