Devices for controlling magnetic nanoparticles to treat fluid obstructions
First Claim
1. A system for treating a fluid obstruction through external magnetomotive manipulation of magnetic nanoparticles introduced within vasculature of a subject, the system comprising:
- a least one motor;
a magnet having a magnetic field and a directed magnetic gradient that are configured to provide external magnetomotive manipulation of magnetic nanoparticles introduced within vasculature of a subject; and
a controller that is configured to cause the at least one motor (a) to control a position, rotation plane and rotation frequency of the magnetic field of the magnet to create a potion, rotation plane and rotation frequency of the magnetic field of the magnet to create a rotating, time-varying magnetic field and (b) to control magnetic components of the magnetic gradient of the magnet,wherein the controller is configured to position and rotate the magnetic field and direct the magnetic gradient in a manner sufficient to cause magnetic nanoparticles introduced within vasculature to agglomerate into a plurality of magnetic nanoparticle rods,wherein the time-varying magnetic field and the directed magnetic gradient are configured to cause the magnetic nanoparticle rods to individually walk in an end over end motion to collectively generate a circulating fluid motion within a blood vessel proximal to a fluid obstruction, andwherein the circulating fluid motion facilitates contact of a therapeutic agent introduced within the blood vessel with the fluid obstruction.
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Accused Products
Abstract
The present invention relates to a system for the physical manipulation of free magnetic rotors in a circulatory system using a remotely placed magnetic field-generating stator. In one aspect, the invention relates to the control of magnetic particles in a fluid medium using permanent magnet-based or electromagnetic field-generating stator sources. Such a system can be useful for increasing the diffusion of therapeutic agents in a fluid medium, such as a human circulatory system, which can result in substantial clearance of fluid obstructions, such as vascular occlusions, in a circulatory system resulting in increased blood flow. Examples of vascular occlusions targeted by the system include, but are not limited to, atherosclerotic plaques, including fibrous caps, fatty buildup, coronary occlusions, arterial stenosis, restenosis, vein thrombi, arterial thrombi, cerebral thrombi, embolisms, hemorrhages, other blood clots, and very small vessels.
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Citations
24 Claims
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1. A system for treating a fluid obstruction through external magnetomotive manipulation of magnetic nanoparticles introduced within vasculature of a subject, the system comprising:
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a least one motor; a magnet having a magnetic field and a directed magnetic gradient that are configured to provide external magnetomotive manipulation of magnetic nanoparticles introduced within vasculature of a subject; and a controller that is configured to cause the at least one motor (a) to control a position, rotation plane and rotation frequency of the magnetic field of the magnet to create a potion, rotation plane and rotation frequency of the magnetic field of the magnet to create a rotating, time-varying magnetic field and (b) to control magnetic components of the magnetic gradient of the magnet, wherein the controller is configured to position and rotate the magnetic field and direct the magnetic gradient in a manner sufficient to cause magnetic nanoparticles introduced within vasculature to agglomerate into a plurality of magnetic nanoparticle rods, wherein the time-varying magnetic field and the directed magnetic gradient are configured to cause the magnetic nanoparticle rods to individually walk in an end over end motion to collectively generate a circulating fluid motion within a blood vessel proximal to a fluid obstruction, and wherein the circulating fluid motion facilitates contact of a therapeutic agent introduced within the blood vessel with the fluid obstruction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for treating a fluid obstruction through external magnetomotive manipulation of magnetic nanoparticles introduced within vasculature of a subject, the system comprising:
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a permanent magnet coupled to mounting flanges on opposite sides of the permanent magnet; a first drive motor configured to rotate the permanent magnet around a first axis; a second drive motor configured to rotate the permanent magnet around a second axis to set an orientation of a rotation plane of the permanent magnet such that the permanent magnet is configured to rotate in such a manner to provide a rotating, time-varying magnetic field and a directed magnetic gradient that allows for external magnetomotive manipulation of magnetic nanoparticles introduced within vasculature of a subject; and a controller configured to cause the first and second drive motors (a) to control a position, rotation plane and rotation frequency of the magnetic field of the permanent magnet and (b) to control magnetic components of the magnetic gradient of the permanent magnet, wherein the controller is configured to position and rotate the magnetic field and direct the magnetic gradient in a manner sufficient to cause magnetic nanoparticles introduced within vasculature to agglomerate into a plurality of magnetic nanoparticle structures, wherein the magnetic field and the magnetic gradient are configured to cause the magnetic nanoparticle structures to individually walk in an end over end motion to collectively generate a circulating fluid motion within a blood vessel proximal to a fluid obstruction, and wherein the circulating fluid motion facilitates contact of a therapeutic agent introduced within the blood vessel with the fluid obstruction. - View Dependent Claims (22, 23, 24)
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Specification