Method of Navigating Medical Devices in the Presence of Radiopaque Material
6 Assignments
0 Petitions
Accused Products
Abstract
A method of navigating the distal end of a medical device through an operating region in a subject'"'"'s body includes displaying an x-ray image of the operating region, including the distal end of the medical device; determining the location of the distal end of the medical device in a reference frame translatable to the displayed x-ray image; and displaying an enhanced indication of the distal end of the medical device on the x-ray image to facilitate the navigation of the distal end of the device in the operating region.
133 Citations
65 Claims
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1-45. -45. (canceled)
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46. A medical device and system for navigating the medical device through an operating region in a subject'"'"'s body, comprising:
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a plurality of transmitting devices at known fixed locations relative to the subject'"'"'s body, being configured to transmit signals from fixed reference locations;
a medical device having a plurality of lead wires that extend through the length of the medical device and connect to at least three coils in the distal end portion of the medical device, the at least three coils being capable of receiving the signals transmitted from the plurality of transmitters;
a processor in connection with the plurality of lead wires, the processor being configured to process the signals received from the transmitters by the at least three coils and to determine the location of the distal tip relative to the frame of reference of the reference locations;
an external source magnet for applying a magnetic field to the operating region of the subject'"'"'s body, the external source magnet being configured to change the direction of the applied magnetic field; and
a power source that may be selectively connected to one or more of the at least three coils to establish a magnetic moment in the distal end portion of the medical device, which magnetic moment causes the distal end of the medical device to orient relative to the applied magnetic field, to thereby direct the distal end portion of the medical device. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53)
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54. A method of navigating the distal end of a medical device through an operating region in a subject'"'"'s body, comprising:
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introducing into a subject'"'"'s body a medical device having a plurality of lead wires that extend through the length of the medical device and connect to at least three coils made of a radiopaque material that are disposed in the distal end portion of the medical device and are capable of receiving transmitted signals;
transmitting signals from a plurality of transmitting devices at known fixed locations relative to the subject'"'"'s body, to provide one or more signals transmitted from fixed reference locations that are received by the at least three coils in the medical device;
processing the signals received from the transmitters by the at least three coils to determine the location of the distal tip relative to the frame of reference of the reference locations;
applying a magnetic field of a select intensity and direction to the operating region of the subject'"'"'s body using an external source magnet; and
selectively connecting an electrical power source to one or more of the at least three coils to establish a magnetic moment in the distal end portion of the medical device, which magnetic moment causes the distal end of the medical device to orient relative to the applied magnetic field, to thereby direct the distal end portion of the medical device. - View Dependent Claims (55, 56, 57, 58, 59)
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60. A method of navigating the distal end of a medical device through an operating region in a subject'"'"'s body, comprising:
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introducing into a subject'"'"'s body a medical device having at least one magnetically responsive element thereon, and a plurality of lead wires that extend through the length of the medical device and connect to at least three coils made of a radiopaque material which are capable of receiving transmitted signals, the at least three coils and magnetically responsive element being disposed at the distal end portion of the medical device;
transmitting signals from a plurality of transmitting devices at known fixed locations relative to the subject'"'"'s body, to provide one or more signals transmitted from fixed reference locations that are received by the at least three coils in the medical device;
processing the signals received from the transmitters by the at least three coils to determine the location of the distal tip relative to the frame of reference of the reference locations;
applying a magnetic field of a select intensity and direction to the operating region of the subject'"'"'s body using an external source magnet; and
selectively connecting an electrical power source to one or more of the at least three coils to establish a magnetic moment in the distal end portion of the medical device, applying a magnetic field of a select intensity and direction to the operating region of the subject'"'"'s body using an external source magnet, such that the magnetically responsive member and the magnetic moment established by the electrically powered coils cause the distal end portion of the medical device to orient relative to the magnetic field, to thereby direct the distal end portion for navigating the medical device. - View Dependent Claims (61, 62, 63, 64, 65)
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Specification