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Publication Number
US-12220163-B2
Publication Date
2025-02-11
Expiration Date
Abstract
Disclosed herein are wirelessly powered tissue ablation devices comprising an alternating magnetic field generator; an ablation probe comprising an ablation tip; a catheter comprising an opening at a tissue insertion end and a lumen extending along a length of the catheter to the catheter opening; and a magnetic field receiving coil configured to be electrically coupled to the ablation probe; wherein at least a portion of the ablation probe is positionable within the lumen of the catheter, and wherein the ablation tip protrudes through the opening of the catheter. Also disclosed are methods of using wirelessly powered tissue ablation devices.
Core Innovation
A wireless tissue ablation device is disclosed that uses an alternating magnetic field generator to wirelessly induce current in a magnetic field receiving coil attached to a catheter. The receiving coil is electrically coupled to a conductive lead formed by electrically conductive material in the catheter, and an ablation probe with an ablation tip and a first electrical lead is positionable within a lumen of the catheter.
The catheter includes an opening at a tissue insertion end and a lumen extending along a length of the catheter to the catheter opening, and the ablation tip protrudes through the opening. During ablation, a conductive circuit is completed when the first electrical lead of the ablation probe contacts the second electrical lead of the catheter, and electrical energizing of the ablation tip is performed based on the induced current in the receiving coil and completion of the conductive circuit.
A method is also disclosed for ablating target tissue in a subject using the catheter-delivered ablation probe with the receiving coil attached to the catheter. The method positions the catheter such that the receiving coil is within proximity to the alternating magnetic field generator and wires the electrical coupling so that the conductive circuit is completed during ablation when the probe’s first lead contacts the catheter’s second lead.
Claims Coverage
The patent includes two independent claims: an independent apparatus claim and an independent method claim. Across these independent claims, the core coverage is centered on wireless power transfer using an alternating magnetic field generator with a catheter-mounted magnetic field receiving coil, and on completing a conductive circuit during ablation by electrical contact between probe and catheter leads while the ablation tip protrudes through a catheter opening.
Wirelessly coupled alternating magnetic field generator with catheter-mounted receiving coil
An alternating magnetic field generator wirelessly induces current in a magnetic field receiving coil attached to the catheter, where the magnetic field receiving coil is electrically coupled to the catheter’s electrically conductive material forming a second electrical lead.
Catheter lumen delivery with ablation tip protrusion
A catheter having an opening at a tissue insertion end and a lumen extending along the catheter to the catheter opening positions at least a portion of the ablation probe within the lumen such that the ablation tip protrudes through the opening.
Conductive circuit completion by first lead contacting second lead during ablation
A conductive circuit is completed when the first electrical lead of the ablation probe contacts the second electrical lead of the catheter during ablation, enabling electrical energizing of the ablation tip.
Wireless induction and conductive circuit completion to energize ablation tip
The method generates a magnetic field from the alternating magnetic field generator to wirelessly induce current in the magnetic field receiving coil attached to the catheter, such that the conductive circuit is completed when the ablation probe first electrical lead contacts the catheter second electrical lead during ablation, and electrically energizes the ablation tip to ablate target tissue.
Collectively, the independent claims cover wireless current induction from an alternating magnetic field generator to a catheter-mounted receiving coil, delivery via a catheter with a lumen and an opening such that the ablation tip protrudes, and completion of a conductive circuit through electrical contact between probe and catheter leads during ablation to electrically energize the ablation tip.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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