Spinal Disc Ablator Tool with Integrated Impedance Control
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Solution Overview
Problem
Existing methods for removing spinal disc material, such as cannulae and rudimentary RF energy techniques, face limitations in visibility and tool efficiency during spinal decompression procedures, necessitating an improved tool and method for effectively ablating herniated discs.
Innovation Solution
An RF surgical system with an ablator tool featuring a first electrode and a return element, connected to a control unit that provides RF energy and measures impedance, along with irrigation and suction capabilities, to facilitate precise tissue ablation while minimizing damage to surrounding tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If cannulae or retractors are used to remove spinal disc material, then the disc space can be accessed, but the amount of disc space viewable by the surgeon is limited
Solution Approach 1:
The patent combines the ablation electrode, irrigation channel, and visualization scope into a single integrated ablator tool. This merging of functions allows the surgeon to visualize the disc space directly through the tool while simultaneously performing ablation and irrigation, eliminating the need for separate cannulae or retractors and improving visibility of the working area.
2Manufacturing precision
If rudimentary RF energy techniques are used for disc ablation, then tissue removal can be achieved, but the precision and control are insufficient
Solution Approach 1:
The patent incorporates impedance sensing capability that provides real-time feedback during RF ablation. The system measures tissue impedance to detect when the electrode is in contact with bone versus soft tissue, automatically adjusting or stopping energy delivery to prevent bone damage. This feedback mechanism enables precise and safe tissue ablation without requiring complex external monitoring equipment.
3Productivity
If RF energy is applied to ablate tissue, then disc material can be removed, but debris accumulation interferes with visualization and continues to cause pressure
Solution Approach 1:
The patent implements continuous irrigation through a dedicated channel in the ablator tool that flows fluid across the electrode tip and ablation site during the entire RF ablation process. This continuous irrigation washes away debris as it is generated, maintaining clear visualization of the surgical field and preventing re-compression of nerve roots by removed disc material throughout the procedure.
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 system enables efficient and controlled removal of spinal disc material, ensuring accurate ablation and debris removal, thereby alleviating pressure on nerve roots and improving surgical outcomes.
Implementation Method 1
transferred energy from a first electrode, through tissue, and into a return element... The tissue can be ablated during the energy transfer from the first electrode through the tissue and into a second electrode
Implementation Method 2
the control unit... measures impedance between a first electrode and return element
Implementation Method 3
the irrigation may pour through an irrigation flow through hole in an electrode tip extending from the distal end of an ablator tool to wash away any debris from the tool
Data Source
AI summary
An ablator system includes a tool for insertion into a patient to ablate tissue. A system also includes a control unit and a pump system. A tool is adapted to receive RF energy from a control unit and ablate tissue between an electrode embedded in the tool and a return element. A control unit measures impedance between the electrode and return element and can disable the RF energy supply if the impedance is outside of an acceptable threshold value range. A tool has at least one port through which irrigation and suction are supplied by the pump system to remove debris. A tool houses a scope in an internal channel to provide visual feedback of the surgical site. A system therefore provides a tool that is visually guided to a surgical site, ablates tissue while utilizing active safety measures, and provides irrigation and suction to clear debris from the surgical site.