Interventional devices for chronic total occlusion recanalization under MRI guidance
First Claim
Patent Images
1. A guide catheter having a distal end and a proximal end, the guide catheter comprising:
- a flexible tubing;
an outer conductive braid within the flexible tubing, the outer conductive braid being substantially concentric to the flexible tubing;
an inner conductive braid within the outer conductive braid, wherein the inner conductive braid and the outer conductive braid form a loopless antenna; and
a loop antenna disposed at the distal end of the guide catheter.
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Abstract
Disclosed is a guide catheter that includes one or more RF antennas to enhance the visibility of the guide catheter in MR imagery. One embodiment of the guide catheter includes a loop coil at the distal end of the guide catheter and a loopless antenna between the distal end and the proximal end. By combining a loop coil and a loopless antenna on the catheter, the shaft of the catheter may be visible in MR imagery while the distal end may appear in the MR imagery more brightly than the shaft.
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Citations
20 Claims
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1. A guide catheter having a distal end and a proximal end, the guide catheter comprising:
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a flexible tubing;
an outer conductive braid within the flexible tubing, the outer conductive braid being substantially concentric to the flexible tubing;
an inner conductive braid within the outer conductive braid, wherein the inner conductive braid and the outer conductive braid form a loopless antenna; and
a loop antenna disposed at the distal end of the guide catheter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A guide catheter having a distal and proximal end, the guide catheter comprising:
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a flexible tubing;
a first microcoaxial cable disposed within the flexible tubing;
a second microcoaxial cable disposed within the flexible tubing;
a loop antenna disposed at the distal end of the guide catheter, wherein the loop antenna is connected to the first microcoaxial cable; and
a loopless antenna disposed between the loops antenna and the proximal end of the guide catheter, wherein the loopless antenna is connected to the second microcoaxial cable. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A guidewire for use in conjunction with a catheter, the guidewire comprising:
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a guidewire microcoaxial cable having a shield;
a first loop antenna disposed at a distal end of the guidewire; and
a second loop antenna, wherein the first loop antenna and the second loop antenna are connected to the shield. - View Dependent Claims (14, 15, 16, 17)
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18. A guide catheter for chronic total occlusion recanalization, the guide catheter having a distal end and a proximal end, the guide catheter comprising:
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a flexible tubing;
an outer conductive braid within the flexible tubing, the outer conductive braid being substantially concentric to the flexible tubing;
an inner conductive braid, substantially concentric to the outer conductive braid, the inner conductive braid extending beyond a termination of the outer conductive braid and toward the distal end;
an insulator between the outer conductive braid and the inner conductive braid;
a microcoaxial cable disposed within the fexible tubing, the microcoaxial cable having an inner conductor and a shield; and
a loop antenna disposed at the distal end of the guide catheter, wherein the loop antenna is connected to the microcoaxial cable. - View Dependent Claims (19, 20)
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Specification