摘要:
A system for delivering therapeutic agent to a target location in a body in accordance with one embodiment is provided comprising a plurality of magnetic particles, each magnetic particle carrying a therapeutic agent, and a magnetic device for attracting the magnetic particles to a target location. The magnetic particles may be delivered by a catheter into a blood vessel upstream from the target location so that they travel toward the target location. A method for delivering therapeutic agent to a target location in a body in accordance with another embodiment comprises providing a plurality of magnetic particles, each magnetic particle carrying a therapeutic agent, placing a magnetic device in a position to attract the magnetic particles to a target location, and allowing the magnetic particles to infuse the target location by the attraction of the magnetic particles to the magnetic device. The therapeutic agent may comprises a therapeutic agent for preventing or treating reperfusion injury, and the step of providing the plurality of magnetic particles may comprise delivering the plurality of magnetic particles through a blood vessel.
摘要:
A system for delivering therapeutic agent to a target location in a body in accordance with one embodiment is provided comprising a plurality of magnetic particles, each magnetic particle carrying a therapeutic agent, and a magnetic device for attracting the magnetic particles to a target location. The magnetic particles may be delivered by a catheter into a blood vessel upstream from the target location so that they travel toward the target location. A method for delivering therapeutic agent to a target location in a body in accordance with another embodiment comprises providing a plurality of magnetic particles, each magnetic particle carrying a therapeutic agent, placing a magnetic device in a position to attract the magnetic particles to a target location, and allowing the magnetic particles to infuse the target location by the attraction of the magnetic particles to the magnetic device. The therapeutic agent may comprises a therapeutic agent for preventing or treating reperfusion injury, and the step of providing the plurality of magnetic particles may comprise delivering the plurality of magnetic particles through a blood vessel.
摘要:
In one embodiment, the present disclosure provides a biodegradable, self-powered medical device for preventing or reducing reperfusion injury, comprising a galvanic cell, the galvanic cell comprising: a first biodegradable electrode member; and a second biodegradable electrode member comprising a biodegradable conductive polymer and an electrode-releasable therapeutic agent, wherein the galvanic cell generates an electric force sufficient to cause the electrode-releasable therapeutic agent to be released from the biodegradable conductive polymer and elute to a target location. The device may further include a reservoir material containing a burst-release therapeutic agent.
摘要:
Methods, apparatus, and systems for altering the configuration of a heart valve. Methods, apparatus, and systems include the use of a cord delivered into the heart by a delivery catheter that can be manipulated by a receiving catheter so as to improve the heart valve function.
摘要:
Methods, apparatus, and systems for occluding a multiplicity of parallel membranes, such as found in a patent foramen ovale (PFO). Methods, apparatus, and systems include the use of a positioning device that can be seated on the limbus of the septum secundum (SS). The positioning device includes a piercing member that can pierce the SS and septum primum (SP). The positioning device also includes a fastening member that can engage the SS and SP to fasten the tissues and thereby occlude a PFO.
摘要:
Methods, apparatus, and systems for locating a patent foramen ovale (PFO) with a positioning device that can be configured to occlude the PFO. Methods, apparatus, and systems include the use of a positioning device that can be seated on the limbus of a septum secundum (SS). The positioning device includes a piercing member that can pierce the SS and a septum primum.
摘要:
A device for occluding a target body lumen, comprises a wire structure defining a wire structure lumen extending therethrough and movable between a reduced diameter insertion configuration and an expanded diameter deployed configuration and a basket structure extending across the wire structure lumen and including therein a cell growth promoting agent to promote cell growth across the wire structure lumen to occlude the target body lumen.
摘要:
A catheter for placement of an in situ implant is provided. This catheter may include a first elongate shaft having a proximal end and a distal end, a second elongate shaft having a proximal end and a distal end, a first sharpened distal tip disposed at the distal end of the first shaft and a second sharpened distal tip disposed at the distal end of the second shaft. The first shaft and the second shaft may also be secured to one another at the distal end of the first shaft according to the invention. Still further, according to other teachings, the first sharpened distal tip may extend beyond the second sharpened distal tip in a catheter that practices the invention.
摘要:
Devices and methods to cool a target tissue region inside the body are described. Fluid cooled below normal body temperature and blood at a normal body temperature are provided to the tissue region in proportions to cool the tissue region. A system for controlling the temperature of the target tissue region is disclosed. The system includes a catheter and a control system that controls the amount of cool fluid and blood provided to the tissue region. A catheter for providing cool fluid to the tissue region is also provided. The catheter includes a temperature sensor that extends to a location distal to the distal end of the catheter to sense the temperature of the tissue region.
摘要:
Devices and methods to cool a target tissue region inside the body are described. Fluid cooled below normal body temperature and blood at a normal body temperature are provided to the tissue region in proportions to cool the tissue region. A system for controlling the temperature of the target tissue region is disclosed. The system includes a catheter and a control system that controls the amount of cool fluid and blood provided to the tissue region. A catheter for providing cool fluid to the tissue region is also provided. The catheter includes a temperature sensor that extends to a location distal to the distal end of the catheter to sense the temperature of the tissue region.