MRI-GUIDED DEVICES AND MRI-GUIDED INTERVENTIONAL SYSTEMS THAT CAN TRACK AND GENERATE DYNAMIC VISUALIZATIONS OF THE DEVICES IN NEAR REAL TIME
First Claim
1. An MRI-compatible catheter, comprising:
- an elongated flexible shaft having a distal end portion and an opposite proximal end portion, wherein at least a portion of the flexible shaft is sized and configured to enter a patient during an MRI-guided medical procedure;
an electrical connector interface attached to the shaft and configured to be in electrical communication with an MRI scanner;
at least one RF tracking coil positioned adjacent the flexible shaft distal end portion, wherein the at least one tracking coil includes a conductive lead extending between the at least one RF tracking coil and the electrical connector interface and is configured to electrically connect the at least one tracking coil to an MRI scanner; and
an ablation tip at the flexible shaft distal end portion, wherein an RF conductor extends longitudinally within the shaft to the electrical connector interface and connects the ablation tip to an RF generator.
4 Assignments
0 Petitions
Accused Products
Abstract
An MRI-compatible catheter includes an elongated flexible shaft having opposite distal and proximal end portions. A handle is attached to the proximal end portion and includes an actuator in communication with the shaft distal end portion that is configured to articulate the shaft distal end portion. The distal end portion of the shaft may include an ablation tip and includes at least one RF tracking coil positioned adjacent the ablation tip that is electrically connected to an MRI scanner. The at least one RF tracking coil is electrically connected to a circuit that reduces coupling when the at least one RF tracking coil is exposed to an MRI environment. Each RF tracking coil is a 1-10 turn solenoid coil, and has a length along the longitudinal direction of the catheter of between about 0.25 mm and about 4 mm.
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Citations
28 Claims
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1. An MRI-compatible catheter, comprising:
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an elongated flexible shaft having a distal end portion and an opposite proximal end portion, wherein at least a portion of the flexible shaft is sized and configured to enter a patient during an MRI-guided medical procedure; an electrical connector interface attached to the shaft and configured to be in electrical communication with an MRI scanner; at least one RF tracking coil positioned adjacent the flexible shaft distal end portion, wherein the at least one tracking coil includes a conductive lead extending between the at least one RF tracking coil and the electrical connector interface and is configured to electrically connect the at least one tracking coil to an MRI scanner; and an ablation tip at the flexible shaft distal end portion, wherein an RF conductor extends longitudinally within the shaft to the electrical connector interface and connects the ablation tip to an RF generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An MRI-compatible catheter, comprising:
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an elongated flexible shaft having a distal end portion and an opposite proximal end portion, wherein at least a portion is sized and configured to enter a patient during an MRI-guided medical procedure; an electrical connector interface attached to the flexible shaft and configured to be in electrical communication with an MRI scanner; a plurality of spaced apart RF tracking coils positioned adjacent the distal end portion of the flexible shaft, wherein each RF tracking coil includes a respective conductive lead extending between a respective RF tracking coil and the electrical connector interface that electrically connects the respective RF tracking coil to an MRI scanner; an ablation tip at the flexible shaft distal end portion, wherein an RF conductor extends longitudinally within the flexible shaft to the electrical connector interface and connects the ablation tip to an RF generator; and at least one fluid exit port at the flexible shaft distal end portion, wherein the at least one fluid exit port is in fluid communication with an irrigation lumen that extends longitudinally through the flexible shaft. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification