Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS20070021731 A1
Publication typeApplication
Application numberUS 11/475,840
Publication dateJan 25, 2007
Filing dateJun 27, 2006
Priority dateNov 12, 1997
Also published asUS7066924
Publication number11475840, 475840, US 2007/0021731 A1, US 2007/021731 A1, US 20070021731 A1, US 20070021731A1, US 2007021731 A1, US 2007021731A1, US-A1-20070021731, US-A1-2007021731, US2007/0021731A1, US2007/021731A1, US20070021731 A1, US20070021731A1, US2007021731 A1, US2007021731A1
InventorsJeffrey Garibaldi, Walter Blume
Original AssigneeGaribaldi Jeffrey M, Blume Walter M
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of and apparatus for navigating medical devices in body lumens
US 20070021731 A1
Abstract
A guide wire combined with a catheter or medical device for moving through a body lumen to a desired position in the body with the aid of an applied magnetic field. The guide wire is provided with a magnet on its distal end that can be oriented or oriented and moved by the application of a magnetic field to the magnet. A catheter or other medical device can be advanced over the guide wire. Once the medical device is in its desired position, the magnet can be withdrawn through the lumen of the catheter. Alternatively, a guide wire with a magnet on its distal end can be docked at the distal end of a catheter or medical device and can be oriented, or oriented and moved by the application of a magnetic field.
Images(7)
Previous page
Next page
Claims(21)
1.-20. (canceled)
21. A method of navigating a medical device having a proximal end portion, a distal end portion, and a magnetically responsive element disposed on the distal end portion of the medical device, the method comprising:
introducing the distal end portion of the medical device having the magnetically responsive element into a subject's body;
applying a magnetic field to the area of the subject in which the medical device is located, the magnetic field being effective for orienting the magnetically responsive element on the distal end portion of the medical device with the magnetic field, wherein the application of the magnetic field is controlled to allow an operator to guide the distal end portion of the medical device in a desired direction; and
applying a subsequent magnetic field to the area of the subject in which the medical device is located, the subsequent magnetic field being effective for pulling the magnetically responsive element on the distal end portion of the medical device to advance the medical device in the desired direction.
22. The method of claim 21 further comprising the steps of iteratively applying a magnetic field effective for orienting the magnetically responsive element on the distal end portion of the medical device with the magnetic field to re-orient the distal end in a desired direction, and a subsequent magnetic field effective for pulling the magnetically responsive element on the distal end portion of the medical device to advance the medical device in the desired direction, to incrementally guide the medical device to a desired location within a subject's body.
23. The method of claim 21 further comprising the steps of advancing a catheter over the medical device, the catheter having a passage therethrough in which the medical device is received, such that the catheter may be advanced over the medical device to guide the catheter to where the distal end portion of the medical device is located within the subject's body.
24. The method of claim 21 further comprising the steps of advancing an endoscope over the medical device, the catheter having a passage therethrough in which the medical device is received, such that the endoscope may be advanced over the medical device to guide the endoscope to where the distal end portion of the medical device is located within the subject's body.
25. The method of claim 21 further comprising the step of pushing the proximal end portion of the medical device to assist in advancing the medical device in the desired direction.
26. The method of claim 23 further comprising the step of retracting the medical device from the catheter once the catheter has been guided to a desired location within the subject's body.
27. The method of claim 24 further comprising the step of retracting the medical device from the endoscope once the endoscope has been guided to a desired location within the subject's body.
28. The method of claim 22 wherein the medical device is inserted within the vasculature of a subject's body.
29. The method of claim 22 wherein the magnetic field is applied from a location external to the subject.
30. A method of navigating a catheter device having a passageway therein through a subject's body, the method comprising:
introducing the distal end portion of the catheter device into a subject's body;
introducing the distal end portion of a medical device into the passage in the catheter device, the medical device having a proximal end portion, a distal end portion, and a magnetically responsive element disposed on the distal end portion of the medical device;
applying a magnetic field to the area of the subject in which the medical device is located, the magnetic field being effective for orienting the magnetically responsive element on the distal end portion of the medical device with the magnetic field, wherein the application of the magnetic field is controlled to allow an operator to guide the distal end portion of the medical device in a desired direction;
applying a subsequent magnetic field to the area of the subject in which the medical device is located, the subsequent magnetic field being effective for pulling the magnetically responsive element on the distal end portion of the medical device to advance the medical device in the desired direction; and
advancing the catheter device, if necessary, over the medical device received within the passage in the catheter device.
31. The method of claim 30 further comprising the steps of iteratively applying a magnetic field effective for orienting the magnetically responsive element on the distal end portion of the medical device with the magnetic field to re-orient the distal end in a desired direction, and a subsequent magnetic field effective for pulling the magnetically responsive element on the distal end portion of the medical device to advance the medical device in the desired direction, to incrementally guide the medical device to a desired location within a subject's body.
32. The method of claim 30 further comprising the step of pushing the proximal end portion of the medical device to assist the subsequent magnetic field in advancing the medical device in the desired direction.
33. The method of claim 30 wherein the catheter device is advanced over the medical device by pushing the proximal end portion of the catheter device to advance the catheter device towards the distal end portion of the medical device.
34. The method of claim 31 further comprising the step of retracting the medical device from the catheter once the catheter device has been guided to a desired location within the subject's body.
35. The method of claim 30 wherein the medical device is inserted within the vasculature of a subject's body.
36. The method of claim 34 wherein the medical device comprises a guide wire having a distal end portion including a core wire on which the magnetically responsive element is disposed, the distal end portion being sufficiently flexible adjacent the magnetically responsive element to allow the wire to flex in response to a magnetic field applied to the magnetically responsive element.
37. The method of claim 30 wherein the magnetic field is applied from a location external to the subject.
38. A method of navigating a medical device having a proximal end portion, a distal end portion, and a magnetically responsive element disposed on the distal end portion of the medical device, the method comprising:
introducing the distal end portion of the medical device having the magnetically responsive element into a subject's body;
applying a magnetic field to the area of the subject in which the medical device is located, the magnetic field being effective for orienting the magnetically responsive element on the distal end portion of the medical device with the magnetic field, wherein the application of the magnetic field is controlled to allow an operator to guide the distal end portion of the medical device in a desired direction; and
pushing the proximal end of the medical device, while the magnetic field is being applied to orient the magnetically responsive element on the distal end portion of the medical device with the magnetic field, to advance the medical device in the desired direction.
39. The method of claim 38 further comprising the steps of iteratively applying a magnetic field effective for orienting the magnetically responsive element on the distal end portion of the medical device with the magnetic field to re-orient the distal end in a desired direction, and pushing the proximal end of the medical device to advance the medical device in the desired direction, to incrementally guide the medical device to a desired location within a subject's body.
40. The method of claim 39 further comprising the steps of advancing a catheter over the medical device, the catheter having a passage therethrough in which the medical device is received, such that the catheter may be advanced over the medical device to guide the catheter to where the distal end portion of the medical device is located within the subject's body.
Description
    CROSS REFERENCE TO RELATED APPLICATION
  • [0001]
    This application is a continuation in part of PCT application Serial No. PCT/US98/02835 filed Feb. 17, 1998.
  • FIELD OF THE INVENTION
  • [0002]
    This invention relates to a method of, and apparatus for, navigating medical devices in body lumens, such as in blood vessels, the trachea, the gastrointestinal tract, or the urinary tract.
  • BACKGROUND OF THE INVENTION
  • [0003]
    Many diagnostic and therapeutic medical procedures require navigating a medical device to a particular location through lumens in the body. For example, procedures such as cardiac catheterizations and interventional neuroradiology procedures involve the introduction of medical devices through the arteries; bronchoscopies involve the introduction of medical devices through the trachea; endoscopies and colonoscopies involve the introduction of instruments through the gastrointestinal tract; and urethroscopies involve the introduction of medical devices through the urinary tract.
  • [0004]
    Numerous methods and apparatus have been developed for introducing medical devices in the body. Many of these methods employ guide wires for remotely controlling the orientation of the tip of the medical device as it is advanced in the body lumen. These guide wires typically have a bend in their distal ends, the tip is rotated until the tip is properly oriented, and the wire is then advanced. It is a difficult and tedious process to steer a medical device remotely with a guide wire since the orientation of the guide wire is difficult to control. Thus, these procedures can be prolonged, which increases the risk to the patient and fatigues the physician.
  • [0005]
    It has been proposed to guide medical devices in the body with magnets, see Yodh, Pierce, Weggel, and Montgomery, A New Magnetic System, for ‘Intravascular Navigation’, Medical & Biological Engineering, Vol. 6, No. 2, pp. 143-147 (March 1968), incorporated herein by reference. This article proposes a magnetically tipped catheter that is steered within the body by an externally applied magnetic field. However, the magnet in this proposed device is attached to the catheter which can impair the ability to control the magnet. Moreover, there is no provision for removing the magnet and leaving the catheter or other medical device in place. Thus, only one such catheter can be directed to a given position because the magnetic field acting on one magnet will also act on the other magnets in the vicinity.
  • SUMMARY OF THE INVENTION
  • [0006]
    The methods and apparatuses of the present invention involve magnetically guiding a medical device through a lumen in the body. Generally, according to the method of this invention, a magnet is provided on the end of a guide wire and an externally applied magnetic field orients the magnet in the body lumen. The magnet can be advanced through the body lumen by manipulating the magnetic field or by pushing the guide wire.
  • [0007]
    According to a first embodiment of this invention, a catheter may be disposed over a guide wire having a magnet on its distal end. The guide wire and catheter combination is introduced into a body lumen through a natural or surgically formed opening. Once in the body the guide wire and catheter combination is navigated through the body lumen by applying a magnetic field, which acts on the distal end of the guide wire, orienting it. Typically, the guide wire is advanced slightly ahead of the catheter at a branch in the body lumen, and a magnetic field is applied to orient the tip of the guide wire, and the guide wire is advanced in the direction of the tip which is oriented into the selected branch. The guide wire can be advanced by the application of the magnetic field, by pushing at the proximal end, or by both. The catheter is then advanced over the guide wire. This process is repeated until the distal end of the catheter is at its desired location. Once the distal end of the catheter is in the desired position, the magnet can be withdrawn through the lumen of the catheter by pulling on the tether. Treatment, such as drug therapy or embolizing agents, can then be passed through the catheter.
  • [0008]
    According to a second embodiment of this invention, a guide wire with a magnet on the tip may be docked at the distal end of the lumen inside a catheter or other medical device. The guide wire and catheter combination is introduced into a body lumen through a natural or surgically formed opening. Once in the body lumen, the guide wire and catheter combination is navigated through the body lumen by applying a magnetic field, which acts upon the magnet-tipped guide wire in the catheter, orienting it. The catheter is advanced by pushing the guide wire. Once the distal end of the catheter is in the desired location, the guide wire can be withdrawn through the lumen of the catheter by pulling on the guide wire. Treatment, such as drug therapy or embolizing agents, can then be passed through the catheter.
  • [0009]
    The methods of the various embodiments of this invention, and the guide wire of the various embodiments of this invention, facilitate quick, easy and accurate positioning of a catheter or other medical device via a body lumen. Once the catheter is properly positioned, it can be used during a diagnostic or therapeutic procedure, either directly or as a passage for other medical devices.
  • [0010]
    These and other features and advantages will be in part apparent and in part pointed out hereinafter.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0011]
    FIG. 1 is a longitudinal cross-sectional view of a guide wire and catheter combination constructed according to the principles of a first embodiment this invention;
  • [0012]
    FIG. 2 is a plan view of the guide wire of the first embodiment;
  • [0013]
    FIG. 3 is an enlarged cross-sectional view of the distal tip of the guide wire;
  • [0014]
    FIG. 4 is an enlarged cross sectional view the distal end of a first alternate construction of the guide wire of the first embodiment, using a socket to secure the magnet;
  • [0015]
    FIG. 5 is an enlarged cross sectional view of the distal end of a second alternate construction of the guide wire of the first embodiment, using a collar to secure the magnet.
  • [0016]
    FIG. 6 is an enlarged cross-sectional view of a third alternate construction of the distal section of the guide wire;
  • [0017]
    FIG. 7 is an enlarged cross-sectional view of a fourth alternate construction of the distal section of the guide wire;
  • [0018]
    FIG. 8 is a side elevation view of the distal section of a fifth alternate construction of the guide wire of the first embodiment with a portion broken away to show details of the construction;
  • [0019]
    FIG. 9 is a side elevation view of the distal end section of a sixth alternate construction of the guide wire of the first embodiment;
  • [0020]
    FIG. 10 is a side elevation view of the distal end section of a seventh alternate construction of the guide wire of the first embodiment;
  • [0021]
    FIG. 11 is a side elevation view of the distal section of an eighth alternate construction of the guide wire of the first embodiment;
  • [0022]
    FIG. 11 a is an enlarged side elevation view of the eighth alternate construction of the distal end section, with a portion broken away to show details of the construction;
  • [0023]
    FIG. 12 is a side elevation view of the distal section of a ninth alternate construction of the guide wire of the first embodiment;
  • [0024]
    FIG. 12 a is a side elevation view of the distal section of the third alternate construction of the guide wire, in a magnetic field;
  • [0025]
    FIG. 13 is a side elevation view of a tenth alternate construction of the distal section of the guide wire;
  • [0026]
    FIG. 13 a is a side elevation view of a tenth alternate construction of the distal tip of the guide wire, in a magnetic field;
  • [0027]
    FIG. 14 is a longitudinal cross-sectional view of the guide wire and endoscope combination constructed according to the principles of the first embodiment of this invention;
  • [0028]
    FIG. 15 is a longitudinal cross-sectional view of a guide wire and catheter combination according a second embodiment of this invention;
  • [0029]
    FIG. 16 is a longitudinal cross-sectional view of a guide wire and catheter combination with the guide wire partially withdrawn from the lumen of the catheter; and
  • [0030]
    FIG. 17 is a side elevation view of a guide wire and biopsy device according to the principles of the present invention.
  • [0031]
    Corresponding reference numbers indicate corresponding parts throughout the several views of the drawings.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • [0032]
    A guide wire and magnet combination constructed according to the principles of a first embodiment of this invention is indicated generally as 20 in FIG. 1. The guide wire and catheter combination 20 comprises a guide wire 22 and a catheter 24. The guide wire 22 comprises a wire 26, which is preferably made of nitinol, which is highly flexible and resists kinking, although the guide wire could be made of some other suitable material. A magnet 28 is mounted on the distal end 30 of the wire 26. This magnet may either be a permanent magnet or a permeable magnetic material. A permanent magnet is easier to orient under the application of a magnetic field, as described below, but a permeable magnetic material is easier to pull under the application of a magnetic field.
  • [0033]
    In the preferred embodiment, the magnet 28 is made of NdFeB (neodymium-iron-boron) or samarium cobalt and is sized to respond to the magnetic field that will be applied to orient the guide wire 22 in the body lumen and to be retracted through the catheter 24. The magnet 28 is preferably elongate so that it can orient the tip of the guide wire 22 in the presence of an applied magnetic field. Magnets of about 0.3 mm (0.02 inches) to about 0.7 mm (0.03 inches) in diameter, and about 1 mm (0.04 inches) to 1.5 mm (0.06 inches) long are sufficiently large for use in navigating a guide wire.
  • [0034]
    As shown in FIGS. 2 and 3, the magnet 28 is preferably a cylindrical body 34 with an axial bore 36 therethrough. The distal end of the wire 26 extends through the bore 36, and is secured with a bead 38 of adhesive on the distal side of the magnet 28. The bead 38 also provides a rounded head on the distal end 30 of the guide wire 22.
  • [0035]
    A first alternate construction of the guide wire 22 of the first embodiment is indicated generally as 40 in FIG. 4. The guide wire 40 is similar in construction to guide wire 22, comprising wire 42, having a proximal end (not shown) and a distal end 44. A mounting body 46, having a socket 48 therein, is attached to the distal end 44 of the wire. A magnet 50 is mounted in the mounting body. The magnet can be secured in the mounting body with adhesive, or the socket 48 can be crimped to secure the proximal end of the magnet 50 in the socket 48.
  • [0036]
    A second alternate construction of the guide wire 22 of the first embodiment is indicated generally as 60 in FIG. 5. The guide wire 60 is similar in construction to guide 22, comprising a wire 62 having a proximal end (not shown) and a distal end 64. A mounting collar 66 is attached to the distal end 64 of the wire 62. A magnet 68 is mounted on the mounting collar 66. The magnet 68 can be secured to the mounting collar 66 by adhesive or by fusion.
  • [0037]
    A third alternate construction of the guide wire 22 is indicated generally as 70 in FIG. 6. The guide wire 70 is similar in construction to guide 22, comprising a wire 72 having a proximal end (not shown) and a distal end 74, and a magnet 76 mounted on the distal end of the wire 72. The magnet 76 is preferably a cylindrical body with an axial bore 78 therethrough. The distal end of the wire 24 extends through the bore 78, and is secured with a bead 80 of adhesive on the distal side of the magnet 76. The bead 80 also provides a rounded head on the distal end of the guide wire 22. There is a tapering collar 82 on the wire 26 proximal to the magnet 76. The collar 82 facilitates withdrawing the magnet 76 through the distal end of the catheter 24. The collar can be made of a platinum or some other non-magnetic radio opaque material so that the position of the end of the guide wire can be easily located with x-ray or fluoroscopic imaging equipment.
  • [0038]
    A fourth alternative construction of a guide wire 22 is indicated generally as 90 in FIG. 7. The guide wire 90 is similar in construction to guide wire 22, comprising a wire 92 having a proximal end (not shown) and a distal end 94, and a magnet 96 on the distal end of the wire 92. The magnet 96 is preferably a cylindrical body with an axial bore 98 therethrough. The distal end of the wire 24 extends through the bore 98, and is secured with a bead 100 of adhesive on the distal side of the magnet 96. The bead 100 also provides a rounded head on the distal end of the guide wire 90. The guide wire 90 includes a sheath 102, made of flexible polyurethane tubing, extending over the wire 92. The sheath 102 preferably has the same outside diameter as the magnet 96, to smoothly slide in the lumen of the catheter, and to help prevent excessive movement of the guide wire 90 within the lumen. The sheath 102 is preferably secured to the proximal end of the magnet 96 with an adhesive, such as SICOMET 40 available from Tracon.
  • [0039]
    A fifth alternate construction of the guide wire of the first embodiment is indicated generally as 110 in FIG. 8. Guide wire 110 comprises a wire 112 having a proximal end (not shown) and a distal end 114. The wire 112 is preferably made of nitinol, which is highly flexible and resists kinking, although it could be made of some other suitable material. A magnet 116, which can either be a permeable magnet or a permanent magnet, is secured on the distal end 114. A permanent magnet is easier to orient under the application of a magnetic field, as described below, but a permeable magnetic material is easier to pull under the application of a magnetic field.
  • [0040]
    The magnet 116 is preferably made of NdFeB (neodymium-iron-boron) or samarium cobalt and is sized to respond to the magnetic field that will be applied to orient the distal tip of the guide wire 110 in the body lumen and to be retracted through the lumen of the catheter or other medical device. The magnet 116 is preferably elongate so that it can orient the distal tip of the guide wire 110 in the presence of an applied magnetic field. Magnets of about 0.3 mm (0.02 inches) to about 0.7 mm (0.03 inches) in diameter, and about 1 mm (0.04 inches) to 1.5 mm (0.06 inches) long are sufficiently large for use in navigating a guide wire.
  • [0041]
    As shown in FIG. 8, the magnet 116 is preferably a cylindrical body. A magnetic or non-magnetic sleeve 118, made of a suitable sheet material or wire, covers the magnet 76 and extends over the distal end 114 of the guide wire 110, securing the magnet on the wire. In this preferred embodiment shown in FIG. 8 the sleeve 118 is made from a thin plastic tube, which is can be secured over the magnet and the distal end of the guide wire, with an adhesive, or more preferably, by heat shrinking.
  • [0042]
    A sixth alternate construction of the guide wire of the first embodiment is indicated generally as 120 in FIG. 9. Guide wire 120 comprises a wire 122 having a proximal end (not shown) and a distal end 124. The wire 122 is preferably made of nitinol, which is highly flexible and resists kinking, although it could be made of some other suitable material. A magnet 126, which can either be a permeable magnet or a permanent magnet, is secured on the distal end 124, for example with adhesive. A permanent magnet is easier to orient under the application of a magnetic field, as described below, but a permeable magnetic material is easier to pull under the application of a magnetic field.
  • [0043]
    The magnet 126 is preferably made of NdFeB (neodymium-iron-boron) or samarium cobalt and is sized to respond to the magnetic field that will be applied to orient the distal tip guide wire 120 in the body lumen and to be retracted through the lumen of the catheter or other medical device. The magnet 126 is preferably elongate so that it can orient the distal tip of the guide wire 120 in the presence of an applied magnetic field. Magnets of about 0.3 mm (0.02 inches) to about 0.7 mm (0.03 inches) in diameter, and about 1 mm (0.04 inches) to 1.5 mm (0.06 inches) long are sufficiently large for use in navigating a guide wire.
  • [0044]
    As shown in FIG. 9, the magnet 126 is preferably a cylindrical body. A sleeve 128, made of wire, covers the magnet 126 and extends over the distal end 124 of the wire 122, helping to secure the magnet on the wire. In this preferred embodiment shown in FIG. 9, the sleeve 128 is a coil of platinum wire, the proximal end of which is secured to the wire 122 proximal to the distal end 124, and the distal end of which is secured to the magnet 126. The coil improves the axial stiffness of the distal end while leaving the guide wire flexible in other directions to permit magnetic navigation. The coil also improves the radiopacity of the end of the guide wire so that it can be seen on x-ray and fluoroscopic images. The coil is secured to the wire 122 and to the magnet 126 with adhesive. The adhesive preferably fills the spaces between the turns of the coil around the magnet 126, so that the surface is smooth.
  • [0045]
    A seventh alternate construction of the guide wire of the first embodiment is indicated generally as 130 in FIG. 10. Guide wire 130 comprises a wire 132 having a proximal end (not shown) and a distal end 134. The wire 132 is preferably made of nitinol, which is highly flexible and resists kinking, although it could be made of some other suitable material. A magnet 136, which can either be a permeable magnet or a permanent magnet, is secured on the distal end 132, for example with adhesive. A permanent magnet is easier to orient under the application of a magnetic field, as described below, but a permeable magnetic material is easier to pull under the application of a magnetic field.
  • [0046]
    The magnet 136 is preferably made of NdFeB (neodymium-iron-boron) or samarium cobalt and is sized to respond to the magnetic field that will be applied to orient the distal tip guide wire 130 in the body lumen and to be retracted through the lumen of the catheter or other medical device. The magnet 136 is preferably elongate so that it can orient the distal tip of the guide wire 130 in the presence of an applied magnetic field. Magnets of about 0.3 mm (0.02 inches) to about 0.7 mm (0.03 inches) in diameter, and about 1 mm (0.04 inches) to 1.5 mm (0.06 inches) long are sufficiently large for use in navigating a guide wire.
  • [0047]
    As shown in FIG. 10, the magnet 136 is preferably a cylindrical body. A coil 138 of platinum wire is disposed over the distal end portion of the wire 132. The proximal end of the coil is attached to the wire 132 proximal to the distal end, and the distal end of the coil is attached to the proximal end of the magnet 136. The coil improves the axial stiffness of the distal end while leaving the guide wire flexible in other directions to permit magnetic navigation. The coil also improves the radiopacity of the end of the guide wire so that it can be seen on x-ray and fluoroscopic images. The coil 98 is secured to the wire 92 and to the magnet 96 with adhesive. A sleeve covers the magnet 136 and extends over the coil 138 an the distal end 134 of the wire 130, helping to secure the magnet and the coil on the wire. In this preferred embodiment shown in FIG. 10, the sleeve 140 is a tube of a flexible plastic material, that is secured with an adhesive, or more preferably by heat shrinking.
  • [0048]
    An eighth alternate construction of the guide wire of the first embodiment is indicated generally as 150 in FIGS. 11 and 11 a. Guide wire 150 comprises a wire 152, having a proximal end (not shown) and a distal end 154. The wire 152 is preferably made of nitinol, which is highly flexible and resists kinking, although it could be made of some other suitable material. The wire 152 tapers toward the distal end 154. The portion of the wire 152 adjacent the distal end is surrounded by a magnetic coil 156.
  • [0049]
    A ninth alternate construction of the first embodiment of a guide wire according to the principles of this invention is indicated generally as 160 in FIGS. 12 and 12 a. Guide wire 160 comprises a wire 162 having a proximal end (not shown) and a distal end 164. Instead of a single magnet on the distal end of the wire, as in the first embodiment, guide wire 160 has a series of spaced magnets 166 on the distal end portion 168 of the wire 162. The magnets 166 each preferably have a generally cylindrical body, with an axial bore 170 extending therethrough. The distal portion 54 of the wire 56 extends through the bores 60, and the magnets 52 are secured to the wire 56 in spaced apart relation with adhesive.
  • [0050]
    The magnets 166 are preferably made from NdFeB, and have a diameter of 2 mm (0.08 inches) and are 4 mm (0.16 inches) long. The magnets 166 are preferably spaced over the distal 5 cm (2 inches) of the guide wire 160, and are spaced 1 cm (0.4 inches) on center. Of course some other size magnets and/or different magnet spacing could be used. Moreover the spacing of the magnets does not have to be equal. This third alternate construction is particularly useful for an electrophysiology catheter where the magnetic fields could pull or shape the guide wire 160 to the heart wall, thereby guiding the electrophysiology catheter over the guide wire against the heart wall.
  • [0051]
    As shown in FIG. 12 a, upon the application of a magnetic field, the magnets 166 on the distal end portion 164 of the guide wire 160 cause the guide wire to assume a particular shape dictated by the field. Thus by controlling the applied magnetic field, the shape of the distal portion of the guide wire can be controlled, facilitating the navigation through, or shaping to, the body lumen. The guide wire 160 can be advanced by pulling with a magnetic force on the magnets 166, or the proximal end can be manually pushed. A magnetic pulling force could also be used to hold the catheter with guide wire to the wall of a body lumen.
  • [0052]
    A tenth alternate construction of the first embodiment of a guide wire constructed according to the principles of the present invention is indicated generally as 180 in FIGS. 13 and 13 a. The guide wire 180 comprises a wire 182, having a proximal end (not shown) and a distal end 184. Instead of the single magnet on the distal end of the wire, or a plurality of magnets on the distal end portion of the wire, the distal end portion 186 of guide wire 180 is made from a magnetic material.
  • [0053]
    The distal end portion 186 is preferably about 0.25 mm (0.01 inches) in diameter, and about 1 cm (0.4 inches) long. The distal end portion can be made of a permeable magnetic material such as a steel or a magnetic stainless steel wire, or a steel or a magnetic stainless steel braid.
  • [0054]
    As shown in FIG. 13 a, upon the application of a magnetic field, the distal end portion 186 of the guide wire 180 assumes a particular orientation dictated by the field. Thus by controlling the applied magnetic field, the orientation and/or shape of the distal portion 186 of the guide wire 180 can be controlled, facilitating the navigation through the body lumen. The guide wire 180 can be advanced by magnet force on the distal end portion 186, or the proximal end can be pushed. The magnetic field can also function to selectively stiffen the distal end portion 186 of the guide wire, to facilitate navigation through the body lumen. This allows the guide wire 182 to be designed with the minimum amount of stiffness to overcome static friction when applying an axial pushing force on at the proximal end. Sufficient stiffness for navigation can be provided by applying a magnetic field to the distal tip.
  • [0055]
    As shown in FIG. 1, the catheter 24 is preferably of conventional construction, having a proximal end 100, a distal end 202, and a lumen 204 extending therebetween. The catheter 24 can be made of polyurethane tubing, or some other suitable material. The size of the catheter 24 depends upon where in the body it will be introduced, and how it will be used. For example, for use in the blood vessels in the brain, the catheter might have an outside diameter of about 0.7 mm (0.03 inches), an inside diameter of about 0.6 mm (0.02 inches), and a length of about 2 m (6.6 feet). Of course, medical devices other than catheters can be used with the guide wire, for example an endoscope where the guide wire is inserted through its working channel. These devices would typically include a lumen extending all or partly along the length of the device that passes over the guide wire so that the device follows the guide wire. One of the guide wires of the present invention can be introduced into a body lumen, such as a blood vessel, and navigated to its desired location by the controlled application of magnetic fields. The application of a magnetic field allows the operator to steer the distal end of the guide wire by orienting the distal end of the guide wire to the desired direction of travel. The guide wire can be advanced using the magnetic field to pull the magnet on the distal end of the guide wire, or the guide wire can be advanced by pushing the proximal end. As the guide wire advances, the catheter 24 or other medical device can be advanced over the guide wire, until the catheter or medical device is in its desired location.
  • [0056]
    Once the distal end 202 of the catheter 24 has been placed in its desired location, the guide wire can be left in place, or if the magnet is sufficiently small, the guide wire can be withdrawn through the lumen 204 of the catheter and out the proximal end 200.
  • [0057]
    The magnetic articulation of the distal end of the guide wire eliminates the need to provide a permanent bend in the guide wire in order to navigate through branches in body lumens. The straight configuration of the guide wires permitted by the present invention permits faster and easier navigation in straight sections of the body lumen and reduces unintentional diversion down branches of the lumen.
  • [0058]
    As shown in FIG. 14, one of the guide wires of this invention can be used to navigate an endoscope 300 through a body lumen, such as a colon. The endoscope 300 has a lumen 302 extending therethrough. A magnetic field is applied to orient the magnet on the distal end of the guide wire with the magnetic field. The endoscope 300 can then be advanced over the guide wire, the lumen 302 sliding over the guide wire. The guide wire is preferably incrementally advanced, and the endoscope is then advanced over the guide wire, until the distal end of the endoscope 300 reaches its desired location.
  • [0059]
    A guide wire and catheter combination constructed according to a second embodiment of this invention is indicated generally as 400 in FIGS. 15 and 16. The guide wire and catheter combination 400 comprises guide wire 402 and catheter 404. The guide wire 402 comprises a wire 406, preferably made of nitinol, which is highly flexible and resists kinking, although the guide wire could be made of some other suitable material. A magnet 408 is mounted on the distal end 410 of the wire 406. This magnet may either be a permanent magnet or a permeable magnetic material. A permanent magnet is easier to orient under the application of a magnetic field, as described below, but a permeable magnetic material is easier to pull under the application of a magnetic field.
  • [0060]
    In the preferred embodiment, the magnet 408 is made of NdFeB (neodymium-iron-boron) or samarium cobalt and is sized to respond to the magnetic field that will be applied to move the guide wire 402 through the body lumen. The magnet 408 is preferably elongate so that it can orient the tip of the guide wire 402 in the presence of an applied magnetic field. Magnets of about 0.3 mm (0.02 inches) to about 0.7 mm (0.03 inches) in diameter, and about 1 mm (0.04 inches) to 1.5 mm (0.06 inches) long are sufficiently large for use in navigating a guide wire.
  • [0061]
    As shown in FIG. 16, the magnet is preferably a cylindrical body with an axial bore 412 therethrough. The distal end of the wire 410 extends through the bore 412, and is secured with a bead 414 of adhesive on the distal side of the magnet 408. The bead 414 also provides a rounded head on the distal end of the guide wire 402. Of course instead of magnet 408, the guide wire 402 could have a plurality of spaced magnets on the distal end portion similar to guide wire 160, described above, or the distal end portion of the guide wire could be made of a flexible magnetic material similar to guide wire 180.
  • [0062]
    The catheter 404 is preferably of conventional construction, having a proximal end 416, a distal end 418, and a lumen 420 extending therebetween. The catheter 404 can be made of polyurethane tubing, or some other suitable material. The size of the catheter 404 depends upon where in the body it will be introduced, and how it will be used. For example, for use in the blood vessels in the brain, the catheter might have an outside diameter of about 0.7 mm (0.13 inches), an inside diameter of about 0.6 mm (0.11 inches), and a length of about 2 m (6.5 feet).
  • [0063]
    The guide wire 402 is adapted to fit inside the lumen 420, and “dock” with the catheter 404. To facilitate this, the distal end of the lumen 420 has a restriction or stricture 422 for engaging the distal end of the guide wire 422. This restriction or stricture is preferably formed by a annular flange 924 on ring 426 provided on the distal end of the catheter, although it could be some other reduction in the lumen that can be engaged by the guide wire. The ring 426 can be made of tantalum.
  • [0064]
    The guide wire and catheter combination 400 can be introduced into a body lumen, such as a blood vessel, and navigated to its desired position by the controlled application of magnetic fields. The application of a magnetic field allows the operator to steer the distal end of the guide wire 402 by orienting the distal end of the guide wire to the desired direction of travel. The guide wire 402 can be advanced using the magnetic field to pull the magnets on the distal end or the guide wire can be advanced by pushing the proximal end. As the guide wire 402 advances, the catheter 404 can be advanced.
  • [0065]
    Once the distal end 418 of the catheter 404 has been placed in its desired location, the guide wire 402 can be withdrawn through the lumen 420, and out the proximal end 416.
  • [0066]
    As shown in FIG. 17, the guide wire 412 can be used to navigate a biopsy tool 428 through a body lumen such as a kidney. The biopsy tool 428 has a lumen 430 therein. The distal end of the guide wire 402 is adapted to fit into the lumen 430 and “dock” with the biopsy tool. A magnetic field is applied to orient the magnet 408 inside the lumen 430 of the biopsy tool 428. The biopsy tool 428 can then be advanced, in the desired direction either by pushing the proximal end of the guide wire 402, or pulling the distal end of the guide wire with the magnetic field. When the biopsy tool 428 has been advanced to its desired location, the guide wire 402 can be withdrawn.
  • [0067]
    The guide wires of either embodiment can be used to deliver catheter or other medical devices to locations within the body accessible via a body lumen. For example the guide wire could be used to navigate a device for retrieval of man made objects stents, or body made objects e.g. stones. The high degree of articulation of the tip provides the control needed to capture and recover such objects.
  • [0000]
    Operation
  • [0068]
    In operation, one of the guide wires 22, 40, 50, 60, 70, 90, 110, 120, 130, 150, 160, or 180 of the first embodiment and an associated catheter or other medical device is introduced through a natural or surgically formed opening in a body lumen. A magnetic field is applied to orient the distal tip within the body lumen. The magnetic field can also be used to advance the distal tip of the guide wire, or the guide wire can be pushed to advance the guide wire in the body lumen. As the guide wire is incrementally advanced the catheter can be advanced over the guide wire. Once the distal end of the catheter is in its desired position, the magnet is removed from the catheter by pulling the guide wire to withdraw the magnet through the lumen of the catheter.
  • [0069]
    Because the magnet on the guide wire can be removed from the treatment site, multiple catheters can be directed in the same general area to facilitate a medical procedure with independent control of the catheters.
  • [0070]
    In operation, the guide wire 402 is inserted into the lumen of the catheter 404 (or other medical device) and the guide wire and catheter combination 400 of the second embodiment is introduced through an opening in a natural or surgically formed opening in a body lumen. A magnetic field is applied to orient the magnet 408 on the proximal end of the guide wire 402, inside the catheter 404. The guide wire and catheter are then advanced, either by applying a magnetic field, or by pushing the distal end of the guide wire. Once the distal end 418 of the catheter is in its desired position, the guide wire 402 is removed from the catheter 404 by pulling the guide wire 402 to withdraw it from the lumen 420 of the catheter.
  • [0071]
    Once the catheter 24 or 404 is in position it can be used for the administration of drug therapy or to perform a medical procedure or it can be used as a guide to insert medical devices to the area surrounding the distal end of the catheter to perform a medical procedure.
  • [0072]
    Because the magnet on the guide wire can be removed from the treatment site, multiple catheters can be directed in the same general area to facilitate a medical procedure with independent control of the catheters. Of course, the magnet could be left in place within the catheter, if desired.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4063561 *Sep 20, 1976Dec 20, 1977The Signal Companies, Inc.Direction control device for endotracheal tube
US4244362 *Nov 29, 1978Jan 13, 1981Anderson Charles CEndotracheal tube control device
US5353807 *Dec 7, 1992Oct 11, 1994Demarco Thomas JMagnetically guidable intubation device
US5429131 *Feb 25, 1994Jul 4, 1995The Regents Of The University Of CaliforniaMagnetized electrode tip catheter
US5654864 *Jul 25, 1994Aug 5, 1997University Of Virginia Patent FoundationControl method for magnetic stereotaxis system
US5843153 *Jul 15, 1997Dec 1, 1998Sulzer Intermedics Inc.Steerable endocardial lead using magnetostrictive material and a magnetic field
US5931818 *Nov 12, 1997Aug 3, 1999Stereotaxis, Inc.Method of and apparatus for intraparenchymal positioning of medical devices
US6014580 *Feb 9, 1998Jan 11, 2000Stereotaxis, Inc.Device and method for specifying magnetic field for surgical applications
US6015414 *Aug 29, 1997Jan 18, 2000Stereotaxis, Inc.Method and apparatus for magnetically controlling motion direction of a mechanically pushed catheter
US6128174 *Aug 29, 1997Oct 3, 2000Stereotaxis, Inc.Method and apparatus for rapidly changing a magnetic field produced by electromagnets
US6148823 *Mar 17, 1999Nov 21, 2000Stereotaxis, Inc.Method of and system for controlling magnetic elements in the body using a gapped toroid magnet
US6152933 *Nov 10, 1998Nov 28, 2000Stereotaxis, Inc.Intracranial bolt and method of placing and using an intracranial bolt to position a medical device
US6157853 *Feb 9, 1998Dec 5, 2000Stereotaxis, Inc.Method and apparatus using shaped field of repositionable magnet to guide implant
US6212419 *Nov 10, 1998Apr 3, 2001Walter M. BlumeMethod and apparatus using shaped field of repositionable magnet to guide implant
US6241671 *Dec 14, 1998Jun 5, 2001Stereotaxis, Inc.Open field system for magnetic surgery
US6292678 *May 13, 1999Sep 18, 2001Stereotaxis, Inc.Method of magnetically navigating medical devices with magnetic fields and gradients, and medical devices adapted therefor
US6296604 *Oct 29, 1999Oct 2, 2001Stereotaxis, Inc.Methods of and compositions for treating vascular defects
US6298257 *Sep 22, 1999Oct 2, 2001Sterotaxis, Inc.Cardiac methods and system
US6304768 *Nov 20, 2000Oct 16, 2001Stereotaxis, Inc.Method and apparatus using shaped field of repositionable magnet to guide implant
US6315709 *Mar 17, 1999Nov 13, 2001Stereotaxis, Inc.Magnetic vascular defect treatment system
US6330467 *Apr 6, 1999Dec 11, 2001Stereotaxis, Inc.Efficient magnet system for magnetically-assisted surgery
US6352363 *Jan 16, 2001Mar 5, 2002Stereotaxis, Inc.Shielded x-ray source, method of shielding an x-ray source, and magnetic surgical system with shielded x-ray source
US6364823 *Mar 16, 2000Apr 2, 2002Stereotaxis, Inc.Methods of and compositions for treating vascular defects
US6375606 *Oct 29, 1999Apr 23, 2002Stereotaxis, Inc.Methods of and apparatus for treating vascular defects
US6385472 *Sep 10, 1999May 7, 2002Stereotaxis, Inc.Magnetically navigable telescoping catheter and method of navigating telescoping catheter
US6401723 *Feb 16, 2000Jun 11, 2002Stereotaxis, Inc.Magnetic medical devices with changeable magnetic moments and method of navigating magnetic medical devices with changeable magnetic moments
US6428551 *Mar 30, 1999Aug 6, 2002Stereotaxis, Inc.Magnetically navigable and/or controllable device for removing material from body lumens and cavities
US6459924 *Nov 10, 1998Oct 1, 2002Stereotaxis, Inc.Articulated magnetic guidance systems and devices and methods for using same for magnetically-assisted surgery
US6505062 *Feb 9, 1998Jan 7, 2003Stereotaxis, Inc.Method for locating magnetic implant by source field
US6507751 *Apr 2, 2001Jan 14, 2003Stereotaxis, Inc.Method and apparatus using shaped field of repositionable magnet to guide implant
US6522909 *Aug 6, 1999Feb 18, 2003Stereotaxis, Inc.Method and apparatus for magnetically controlling catheters in body lumens and cavities
US6524303 *Sep 8, 2000Feb 25, 2003Stereotaxis, Inc.Variable stiffness magnetic catheter
US6527782 *Jun 6, 2001Mar 4, 2003Sterotaxis, Inc.Guide for medical devices
US6537196 *Oct 24, 2000Mar 25, 2003Stereotaxis, Inc.Magnet assembly with variable field directions and methods of magnetically navigating medical objects
US6542766 *Jul 19, 2001Apr 1, 2003Andrew F. HallMedical devices adapted for magnetic navigation with magnetic fields and gradients
US6562019 *Sep 20, 1999May 13, 2003Stereotaxis, Inc.Method of utilizing a magnetically guided myocardial treatment system
US6630879 *Feb 3, 2000Oct 7, 2003Stereotaxis, Inc.Efficient magnet system for magnetically-assisted surgery
US6662034 *Apr 23, 2001Dec 9, 2003Stereotaxis, Inc.Magnetically guidable electrophysiology catheter
US6677752 *Nov 20, 2000Jan 13, 2004Stereotaxis, Inc.Close-in shielding system for magnetic medical treatment instruments
US6702804 *Oct 3, 2000Mar 9, 2004Stereotaxis, Inc.Method for safely and efficiently navigating magnetic devices in the body
US6733511 *Sep 12, 2001May 11, 2004Stereotaxis, Inc.Magnetically navigable and/or controllable device for removing material from body lumens and cavities
US6755816 *Jun 12, 2003Jun 29, 2004Stereotaxis, Inc.Method for safely and efficiently navigating magnetic devices in the body
US6817364 *Jul 23, 2001Nov 16, 2004Stereotaxis, Inc.Magnetically navigated pacing leads, and methods for delivering medical devices
US6834201 *May 5, 2003Dec 21, 2004Stereotaxis, Inc.Catheter navigation within an MR imaging device
US6902528 *Apr 14, 1999Jun 7, 2005Stereotaxis, Inc.Method and apparatus for magnetically controlling endoscopes in body lumens and cavities
US6911026 *Jul 12, 1999Jun 28, 2005Stereotaxis, Inc.Magnetically guided atherectomy
US6968846 *Mar 7, 2002Nov 29, 2005Stereotaxis, Inc.Method and apparatus for refinably accurate localization of devices and instruments in scattering environments
US6975197 *Jan 23, 2002Dec 13, 2005Stereotaxis, Inc.Rotating and pivoting magnet for magnetic navigation
US6980843 *May 21, 2003Dec 27, 2005Stereotaxis, Inc.Electrophysiology catheter
US7008418 *May 9, 2003Mar 7, 2006Stereotaxis, Inc.Magnetically assisted pulmonary vein isolation
US7010338 *Jan 6, 2003Mar 7, 2006Stereotaxis, Inc.Device for locating magnetic implant by source field
US7019610 *Jan 17, 2003Mar 28, 2006Stereotaxis, Inc.Magnetic navigation system
US7020512 *Jan 14, 2002Mar 28, 2006Stereotaxis, Inc.Method of localizing medical devices
US7066924 *Nov 25, 1998Jun 27, 2006Stereotaxis, Inc.Method of and apparatus for navigating medical devices in body lumens by a guide wire with a magnetic tip
US20010038683 *Apr 25, 2001Nov 8, 2001Ritter Rogers C.Open field system for magnetic surgery
US20020019644 *Feb 5, 2001Feb 14, 2002Hastings Roger N.Magnetically guided atherectomy
US20020177789 *May 3, 2002Nov 28, 2002Ferry Steven J.System and methods for advancing a catheter
US20040006301 *May 13, 2003Jan 8, 2004Sell Jonathan C.Magnetically guided myocardial treatment system
US20040019447 *Jul 15, 2003Jan 29, 2004Yehoshua ShacharApparatus and method for catheter guidance control and imaging
US20040064153 *Sep 30, 2003Apr 1, 2004Creighton Francis M.Efficient magnet system for magnetically-assisted surgery
US20040068173 *May 29, 2003Apr 8, 2004Viswanathan Raju R.Remote control of medical devices using a virtual device interface
US20040096511 *Jul 3, 2003May 20, 2004Jonathan HarburnMagnetically guidable carriers and methods for the targeted magnetic delivery of substances in the body
US20040133130 *Jan 6, 2003Jul 8, 2004Ferry Steven J.Magnetically navigable medical guidewire
US20040157082 *Jul 21, 2003Aug 12, 2004Ritter Rogers C.Coated magnetically responsive particles, and embolic materials using coated magnetically responsive particles
US20040158972 *Nov 6, 2003Aug 19, 2004Creighton Francis M.Method of making a compound magnet
US20040186376 *Sep 30, 2003Sep 23, 2004Hogg Bevil J.Method and apparatus for improved surgical navigation employing electronic identification with automatically actuated flexible medical devices
US20040199074 *Mar 9, 2004Oct 7, 2004Ritter Rogers C.Method for safely and efficiently navigating magnetic devices in the body
US20040249262 *Mar 12, 2004Dec 9, 2004Werp Peter R.Magnetic navigation system
US20040249263 *Mar 15, 2004Dec 9, 2004Creighton Francis M.Magnetic navigation system and magnet system therefor
US20040260172 *Apr 23, 2004Dec 23, 2004Ritter Rogers C.Magnetic navigation of medical devices in magnetic fields
US20050020911 *Jun 29, 2004Jan 27, 2005Viswanathan Raju R.Efficient closed loop feedback navigation
US20050043611 *Apr 29, 2004Feb 24, 2005Sabo Michael E.Variable magnetic moment MR navigation
US20050065435 *May 12, 2004Mar 24, 2005John RauchUser interface for remote control of medical devices
US20050096589 *Oct 20, 2003May 5, 2005Yehoshua ShacharSystem and method for radar-assisted catheter guidance and control
US20050113628 *Sep 21, 2004May 26, 2005Creighton Francis M.IvRotating and pivoting magnet for magnetic navigation
US20050113812 *Sep 16, 2004May 26, 2005Viswanathan Raju R.User interface for remote control of medical devices
US20050119687 *Sep 8, 2004Jun 2, 2005Dacey Ralph G.Jr.Methods of, and materials for, treating vascular defects with magnetically controllable hydrogels
US20050182315 *Nov 8, 2004Aug 18, 2005Ritter Rogers C.Magnetic resonance imaging and magnetic navigation systems and methods
US20050256398 *May 12, 2004Nov 17, 2005Hastings Roger NSystems and methods for interventional medicine
US20060009735 *Jun 29, 2005Jan 12, 2006Viswanathan Raju RNavigation of remotely actuable medical device using control variable and length
US20060025679 *Jun 6, 2005Feb 2, 2006Viswanathan Raju RUser interface for remote control of medical devices
US20060036125 *Jun 6, 2005Feb 16, 2006Viswanathan Raju RUser interface for remote control of medical devices
US20060036163 *Jul 19, 2005Feb 16, 2006Viswanathan Raju RMethod of, and apparatus for, controlling medical navigation systems
US20060041178 *Jun 6, 2005Feb 23, 2006Viswanathan Raju RUser interface for remote control of medical devices
US20060041179 *Jun 6, 2005Feb 23, 2006Viswanathan Raju RUser interface for remote control of medical devices
US20060041180 *Jun 6, 2005Feb 23, 2006Viswanathan Raju RUser interface for remote control of medical devices
US20060041181 *Jun 6, 2005Feb 23, 2006Viswanathan Raju RUser interface for remote control of medical devices
US20060041245 *Jun 1, 2004Feb 23, 2006Ferry Steven JSystems and methods for medical device a dvancement and rotation
US20060058646 *Aug 26, 2004Mar 16, 2006Raju ViswanathanMethod for surgical navigation utilizing scale-invariant registration between a navigation system and a localization system
US20060074297 *Aug 23, 2005Apr 6, 2006Viswanathan Raju RMethods and apparatus for steering medical devices in body lumens
US20060079745 *Oct 7, 2004Apr 13, 2006Viswanathan Raju RSurgical navigation with overlay on anatomical images
US20060079812 *Sep 6, 2005Apr 13, 2006Viswanathan Raju RMagnetic guidewire for lesion crossing
US20060093193 *Oct 29, 2004May 4, 2006Viswanathan Raju RImage-based medical device localization
US20060094956 *Oct 29, 2004May 4, 2006Viswanathan Raju RRestricted navigation controller for, and methods of controlling, a remote navigation system
US20060100505 *Oct 26, 2004May 11, 2006Viswanathan Raju RSurgical navigation using a three-dimensional user interface
US20060114088 *Jan 13, 2006Jun 1, 2006Yehoshua ShacharApparatus and method for generating a magnetic field
US20060116633 *Jan 13, 2006Jun 1, 2006Yehoshua ShacharSystem and method for a magnetic catheter tip
US20060144407 *Jul 20, 2005Jul 6, 2006Anthony AlibertoMagnetic navigation manipulation apparatus
US20060144408 *Jul 21, 2005Jul 6, 2006Ferry Steven JMicro-catheter device and method of using same
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7526337Jun 6, 2006Apr 28, 2009Cardiac Pacemakers, Inc.Method and device for lymphatic system monitoring
US7708696Jan 11, 2006May 4, 2010Stereotaxis, Inc.Navigation using sensed physiological data as feedback
US7734341Jun 6, 2006Jun 8, 2010Cardiac Pacemakers, Inc.Method and apparatus for gastrointestinal stimulation via the lymphatic system
US7747960Feb 2, 2007Jun 29, 2010Stereotaxis, Inc.Control for, and method of, operating at least two medical systems
US7757694Jul 20, 2010Stereotaxis, Inc.Method for safely and efficiently navigating magnetic devices in the body
US7761157Feb 16, 2007Jul 20, 2010Cardiac Pacemakers, Inc.Cardiac stimulation and sensing with endolymphatically implanted lead
US7769444Aug 3, 2010Stereotaxis, Inc.Method of treating cardiac arrhythmias
US7771415Aug 10, 2010Stereotaxis, Inc.Method for safely and efficiently navigating magnetic devices in the body
US7772950Aug 10, 2010Stereotaxis, Inc.Method and apparatus for dynamic magnetic field control using multiple magnets
US7818076Oct 19, 2010Stereotaxis, Inc.Method and apparatus for multi-system remote surgical navigation from a single control center
US7894906Jun 6, 2006Feb 22, 2011Cardiac Pacemakers, Inc.Amelioration of chronic pain by endolymphatic stimulation
US7961924Jun 14, 2011Stereotaxis, Inc.Method of three-dimensional device localization using single-plane imaging
US7961926Jun 14, 2011Stereotaxis, Inc.Registration of three-dimensional image data to 2D-image-derived data
US7966059Jun 21, 2011Stereotaxis, Inc.Rotating and pivoting magnet for magnetic navigation
US8024024Jun 27, 2008Sep 20, 2011Stereotaxis, Inc.Remote control of medical devices using real time location data
US8060184Jul 20, 2007Nov 15, 2011Stereotaxis, Inc.Method of navigating medical devices in the presence of radiopaque material
US8126538Jun 6, 2006Feb 28, 2012Cardiac Pacemakers, Inc.Method and apparatus for introducing endolymphatic instrumentation
US8135185Oct 18, 2007Mar 13, 2012Stereotaxis, Inc.Location and display of occluded portions of vessels on 3-D angiographic images
US8196590Jun 24, 2008Jun 12, 2012Stereotaxis, Inc.Variable magnetic moment MR navigation
US8231618Jul 31, 2012Stereotaxis, Inc.Magnetically guided energy delivery apparatus
US8242972Aug 14, 2012Stereotaxis, Inc.System state driven display for medical procedures
US8244824Aug 14, 2012Stereotaxis, Inc.Coordinated control for multiple computer-controlled medical systems
US8273081Sep 10, 2007Sep 25, 2012Stereotaxis, Inc.Impedance-based cardiac therapy planning method with a remote surgical navigation system
US8308628Nov 13, 2012Pulse Therapeutics, Inc.Magnetic-based systems for treating occluded vessels
US8313422Nov 20, 2012Pulse Therapeutics, Inc.Magnetic-based methods for treating vessel obstructions
US8369934Jul 6, 2010Feb 5, 2013Stereotaxis, Inc.Contact over-torque with three-dimensional anatomical data
US8369943Oct 22, 2009Feb 5, 2013Cardiac Pacemakers, Inc.Method and apparatus for neural stimulation via the lymphatic system
US8529428May 31, 2012Sep 10, 2013Pulse Therapeutics, Inc.Methods of controlling magnetic nanoparticles to improve vascular flow
US8715150Nov 2, 2010May 6, 2014Pulse Therapeutics, Inc.Devices for controlling magnetic nanoparticles to treat fluid obstructions
US8799792May 8, 2007Aug 5, 2014Stereotaxis, Inc.Workflow driven method of performing multi-step medical procedures
US8806359May 8, 2007Aug 12, 2014Stereotaxis, Inc.Workflow driven display for medical procedures
US8897878May 6, 2010Nov 25, 2014Cardiac Pacemakers, Inc.Method and apparatus for gastrointestinal stimulation via the lymphatic system
US8905999Sep 1, 2006Dec 9, 2014Cardiac Pacemakers, Inc.Method and apparatus for endolymphatic drug delivery
US8926491Sep 6, 2013Jan 6, 2015Pulse Therapeutics, Inc.Controlling magnetic nanoparticles to increase vascular flow
US8961435 *Aug 15, 2012Feb 24, 2015Radius Medical LLCCoaxial guidewire for small vessel access
US9037244Feb 13, 2008May 19, 2015Virender K. SharmaMethod and apparatus for electrical stimulation of the pancreatico-biliary system
US9111016Jul 7, 2008Aug 18, 2015Stereotaxis, Inc.Management of live remote medical display
US9314222Sep 5, 2008Apr 19, 2016Stereotaxis, Inc.Operation of a remote medical navigation system using ultrasound image
US9339664May 2, 2014May 17, 2016Pulse Therapetics, Inc.Control of magnetic rotors to treat therapeutic targets
US9345498Dec 23, 2014May 24, 2016Pulse Therapeutics, Inc.Methods of controlling magnetic nanoparticles to improve vascular flow
US20040169316 *Feb 27, 2004Sep 2, 2004Siliconix Taiwan Ltd.Encapsulation method and leadframe for leadless semiconductor packages
US20050113812 *Sep 16, 2004May 26, 2005Viswanathan Raju R.User interface for remote control of medical devices
US20060270915 *Jan 11, 2006Nov 30, 2006Ritter Rogers CNavigation using sensed physiological data as feedback
US20070016131 *Dec 21, 2005Jan 18, 2007Munger Gareth TFlexible magnets for navigable medical devices
US20070060829 *Jun 29, 2006Mar 15, 2007Carlo PapponeMethod of finding the source of and treating cardiac arrhythmias
US20070060962 *Jun 29, 2006Mar 15, 2007Carlo PapponeApparatus and methods for cardiac resynchronization therapy and cardiac contractility modulation
US20070060966 *Jun 29, 2006Mar 15, 2007Carlo PapponeMethod of treating cardiac arrhythmias
US20070060992 *Jun 2, 2006Mar 15, 2007Carlo PapponeMethods and devices for mapping the ventricle for pacing lead placement and therapy delivery
US20070062547 *Jun 29, 2006Mar 22, 2007Carlo PapponeSystems for and methods of tissue ablation
US20070149946 *Dec 5, 2006Jun 28, 2007Viswanathan Raju RAdvancer system for coaxial medical devices
US20070161882 *Aug 16, 2006Jul 12, 2007Carlo PapponeElectrophysiology catheter and system for gentle and firm wall contact
US20070167720 *Dec 6, 2006Jul 19, 2007Viswanathan Raju RSmart card control of medical devices
US20070179492 *Jan 8, 2007Aug 2, 2007Carlo PapponeElectrophysiology catheter and system for gentle and firm wall contact
US20070197899 *Jan 16, 2007Aug 23, 2007Ritter Rogers CApparatus and method for magnetic navigation using boost magnets
US20070197906 *Jan 16, 2007Aug 23, 2007Ritter Rogers CMagnetic field shape-adjustable medical device and method of using the same
US20070250041 *Apr 19, 2007Oct 25, 2007Werp Peter RExtendable Interventional Medical Devices
US20070282376 *Jun 6, 2006Dec 6, 2007Shuros Allan CMethod and apparatus for neural stimulation via the lymphatic system
US20070282380 *Feb 16, 2007Dec 6, 2007Cardiac PacemakersCardiac stimulation and sensing with endolymphatically implanted lead
US20070282382 *Jun 6, 2006Dec 6, 2007Shuros Allan CMethod and device for lymphatic system monitoring
US20070282386 *Jun 6, 2006Dec 6, 2007Shuros Allan CMethod and apparatus for gastrointestinal stimulation via the lymphatic system
US20070287909 *Apr 4, 2007Dec 13, 2007Stereotaxis, Inc.Method and apparatus for magnetically controlling catheters in body lumens and cavities
US20080009719 *Jun 6, 2006Jan 10, 2008Shuros Allan CMethod and apparatus for introducing endolymphatic instrumentation
US20080015670 *Jan 16, 2007Jan 17, 2008Carlo PapponeMethods and devices for cardiac ablation
US20080016677 *Jan 8, 2007Jan 24, 2008Stereotaxis, Inc.Rotating and pivoting magnet for magnetic navigation
US20080039830 *Aug 14, 2007Feb 14, 2008Munger Gareth TMethod and Apparatus for Ablative Recanalization of Blocked Vasculature
US20080047568 *Sep 4, 2007Feb 28, 2008Ritter Rogers CMethod for Safely and Efficiently Navigating Magnetic Devices in the Body
US20080055239 *Feb 2, 2007Mar 6, 2008Garibaldi Jeffrey MGlobal Input Device for Multiple Computer-Controlled Medical Systems
US20080058609 *May 8, 2007Mar 6, 2008Stereotaxis, Inc.Workflow driven method of performing multi-step medical procedures
US20080059598 *Feb 2, 2007Mar 6, 2008Garibaldi Jeffrey MCoordinated Control for Multiple Computer-Controlled Medical Systems
US20080064933 *May 9, 2007Mar 13, 2008Stereotaxis, Inc.Workflow driven display for medical procedures
US20080064969 *Sep 11, 2007Mar 13, 2008Nathan KasteleinAutomated Mapping of Anatomical Features of Heart Chambers
US20080065061 *Sep 10, 2007Mar 13, 2008Viswanathan Raju RImpedance-Based Cardiac Therapy Planning Method with a Remote Surgical Navigation System
US20080077007 *Jul 20, 2007Mar 27, 2008Hastings Roger NMethod of Navigating Medical Devices in the Presence of Radiopaque Material
US20080097200 *Oct 18, 2007Apr 24, 2008Blume Walter MLocation and Display of Occluded Portions of Vessels on 3-D Angiographic Images
US20080097412 *Sep 1, 2006Apr 24, 2008Shuros Allan CMethod and apparatus for endolymphatic drug delivery
US20080132910 *Oct 18, 2007Jun 5, 2008Carlo PapponeControl for a Remote Navigation System
US20080195171 *Feb 13, 2008Aug 14, 2008Sharma Virender KMethod and Apparatus for Electrical Stimulation of the Pancreatico-Biliary System
US20080200913 *Jan 30, 2008Aug 21, 2008Viswanathan Raju RSingle Catheter Navigation for Diagnosis and Treatment of Arrhythmias
US20080208912 *Feb 19, 2008Aug 28, 2008Garibaldi Jeffrey MSystem and method for providing contextually relevant medical information
US20080228065 *Mar 13, 2007Sep 18, 2008Viswanathan Raju RSystem and Method for Registration of Localization and Imaging Systems for Navigational Control of Medical Devices
US20080228068 *Mar 13, 2007Sep 18, 2008Viswanathan Raju RAutomated Surgical Navigation with Electro-Anatomical and Pre-Operative Image Data
US20080287909 *May 15, 2008Nov 20, 2008Viswanathan Raju RMethod and apparatus for intra-chamber needle injection treatment
US20080292901 *Nov 7, 2007Nov 27, 2008Hon Hai Precision Industry Co., Ltd.Magnesium alloy and thin workpiece made of the same
US20080294232 *May 15, 2008Nov 27, 2008Viswanathan Raju RMagnetic cell delivery
US20080312673 *Jun 5, 2008Dec 18, 2008Viswanathan Raju RMethod and apparatus for CTO crossing
US20090012821 *Jul 7, 2008Jan 8, 2009Guy BessonManagement of live remote medical display
US20090062646 *Sep 5, 2008Mar 5, 2009Creighton Iv Francis MOperation of a remote medical navigation system using ultrasound image
US20090082722 *Aug 21, 2008Mar 26, 2009Munger Gareth TRemote navigation advancer devices and methods of use
US20090105579 *Oct 14, 2008Apr 23, 2009Garibaldi Jeffrey MMethod and apparatus for remotely controlled navigation using diagnostically enhanced intra-operative three-dimensional image data
US20090131798 *Nov 19, 2008May 21, 2009Minar Christopher DMethod and apparatus for intravascular imaging and occlusion crossing
US20090131927 *Nov 17, 2008May 21, 2009Nathan KasteleinMethod and apparatus for remote detection of rf ablation
US20090177032 *Jan 8, 2009Jul 9, 2009Garibaldi Jeffrey MMethod and apparatus for magnetically controlling endoscopes in body lumens and cavities
US20090177037 *Jun 27, 2008Jul 9, 2009Viswanathan Raju RRemote control of medical devices using real time location data
US20090228059 *Apr 27, 2009Sep 10, 2009Shuros Allan CMethod and device for lymphatic system monitoring
US20100042170 *Feb 18, 2010Shuros Allan CMethod and apparatus for neural stimulation via the lymphatic system
US20100063385 *Mar 11, 2010Garibaldi Jeffrey MMethod and apparatus for magnetically controlling catheters in body lumens and cavities
US20100069733 *Sep 3, 2009Mar 18, 2010Nathan KasteleinElectrophysiology catheter with electrode loop
US20100097315 *Jul 17, 2009Apr 22, 2010Garibaldi Jeffrey MGlobal input device for multiple computer-controlled medical systems
US20100163061 *Sep 28, 2009Jul 1, 2010Creighton Francis MMagnets with varying magnetization direction and method of making such magnets
US20100168549 *Jul 29, 2009Jul 1, 2010Carlo PapponeElectrophysiology catheter and system for gentle and firm wall contact
US20100217346 *May 6, 2010Aug 26, 2010Shuros Allan CMethod and apparatus for gastrointestinal stimulation via the lymphatic system
US20100222669 *Sep 2, 2010William FlickingerMedical device guide
US20100298845 *May 25, 2010Nov 25, 2010Kidd Brian LRemote manipulator device
US20110022029 *Jul 6, 2010Jan 27, 2011Viswanathan Raju RContact over-torque with three-dimensional anatomical data
US20110033100 *Jul 13, 2010Feb 10, 2011Viswanathan Raju RRegistration of three-dimensional image data to 2d-image-derived data
US20110046618 *Feb 24, 2011Minar Christopher DMethods and systems for treating occluded blood vessels and other body cannula
US20110130718 *Nov 25, 2010Jun 2, 2011Kidd Brian LRemote Manipulator Device
US20130046203 *Feb 21, 2013Richard M. DeMelloCoaxial guidewire for small vessel access
WO2007146493A1 *Apr 23, 2007Dec 21, 2007Cardiac Pacemakers, Inc.Method and apparatus for introducing endolymphatic instrumentation
Classifications
U.S. Classification604/510, 600/585, 604/164.13
International ClassificationA61M31/00, A61M5/178, A61M25/00
Cooperative ClassificationA61M25/0127, A61M2025/09083, A61M2025/09075, A61M25/09
European ClassificationA61M25/01C8, A61M25/09
Legal Events
DateCodeEventDescription
Dec 6, 2011ASAssignment
Owner name: SILICON VALLEY BANK, ILLINOIS
Free format text: SECURITY AGREEMENT;ASSIGNOR:STEREOTAXIS, INC.;REEL/FRAME:027332/0178
Effective date: 20111130
Dec 8, 2011ASAssignment
Owner name: COWEN HEALTHCARE ROYALTY PARTNERS II, L.P., AS LEN
Free format text: SECURITY AGREEMENT;ASSIGNOR:STEREOTAXIS, INC.;REEL/FRAME:027346/0001
Effective date: 20111205