Magnetically directable remote guidance systems, and methods of use thereof
First Claim
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1. An apparatus for orienting a directable device, comprising;
- (a) a directable device adapted for insertion into a patient comprising a substrate wrapped with a multi-coil package comprising overlapping or overlaid coaxial coils, which package is adapted for conducting multiple, independent electric currents such that when the currents are passed through the multi-coil package a local directable magnetic moment is created;
(b) a means for selectively applying electric currents through the multi-coil package to orient the substrate; and
(c) a means external to the patient for generating a magnetic field to which the directable device is exposed, wherein the local directable magnetic moment is at a controllable angle with respect to the substrate to orient the substrate in the magnetic field.
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Abstract
A magnetically directable guidance system useful in, for example, medical magnetic resonance imaging is provided, as well as methods of directing the traverse of a device directable by the remote guidance system to a remote destination. A directable device and methods of use thereof are also disclosed. In one embodiment, the device is a catheter directable using a magnetic resonance imaging system. In another embodiment, the method includes interventional radiological diagnostic and therapeutic procedures.
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Citations
95 Claims
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1. An apparatus for orienting a directable device, comprising;
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(a) a directable device adapted for insertion into a patient comprising a substrate wrapped with a multi-coil package comprising overlapping or overlaid coaxial coils, which package is adapted for conducting multiple, independent electric currents such that when the currents are passed through the multi-coil package a local directable magnetic moment is created;
(b) a means for selectively applying electric currents through the multi-coil package to orient the substrate; and
(c) a means external to the patient for generating a magnetic field to which the directable device is exposed, wherein the local directable magnetic moment is at a controllable angle with respect to the substrate to orient the substrate in the magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method of orienting a directable device, comprising:
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(a) inserting a directable device into a patient, the directable device comprising a substrate wrapped with a multi-coil package comprising overlapping or overlaid coaxial coils, which package is adapted for conducting electric currents such that currents passed through the multi-coil package create a local directable magnetic moment;
(b) selectively applying independent electric currents through individual coils of the multi-coil package to orient the substrate; and
(c) generating a magnetic field external to the patient at a strength and frequency sufficient to effect orienting of the directable device in a desired direction;
wherein the local directable magnetic moment is at a controllable angle with respect to the substrate to orient the substrate in the external magnetic field. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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73. A directable catheter comprising:
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(a) a flexible elongate substrate having a proximal end and a distal end adapted to be situated in a body cavity, duct or vessel, wherein the distal end comprises a tip; and
(b) a multi-coil package comprising overlapping or overlaid coaxial coils, which multi-coil package is attached to the substrate, the multi-coil package comprising a conductive material, wherein the multi-coil package is adapted for conducting multiple, independent electric currents such that currents passed through the multi-coil package create a local directable magnetic moment;
wherein the local directable magnetic moment is at a controllable angle with respect to the substrate to provide a torque to orient the substrate in a magnetic field generated external to the body cavity, duct or vessel. - View Dependent Claims (74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95)
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Specification