| 摘要 |
The steerable catheter comprises a flexible tube, inside of which different conducts are arranged: one or more conducts for drug administration, vacuum conducts associated with different radiofrequency electrodes, conducts for the conductive wires that conducts the radiofrequency energy to the distal end of the catheter, conducts for the fiber optic cable/s that conducts the laser energy to the distal end of the catheter, a guiding wire for the catherization, and another components; the steerable catheter being connected from the proximal end to a energy unit and other pressure and/or dosing devices; and the steerable catheter optionally including an inflatable balloon to help occluding the vessel; and it also incorporates one or two electrode/s or conductive layer/s in the distal end of the catheter; the objective of the steerable catheter being the obtaining of better results in the embolization and/or chemoembolization treatments. |
| 主权项 |
1. A steerable catheter used for the chemoembolization and/or embolization of vascular structures, tumours and/or organs, comprising: a flexible tube including a proximal end and a distal end, said flexible tube enclosing a plurality of lumens, said proximal end of the catheter being attached to a handle including a plurality of ports for the connection and introduction of a plurality of elements in said plurality of lumens, one lumen of said plurality of lumens being used for receiving the guiding wire for the catherization, and optionally the catheter also comprises an obturatory balloon disposed near a distal end of the catheter and another lumen of said plurality of lumens for steering the substance that inflates and deflates said obturatory balloon, said plurality of lumens including
at least one lumen for drug administration disposed along the catheter, from said proximal end to said distal end of the catheter, said lumen adapted to transfer drug to the target tissue; and a common energy lumen disposed along the catheter, from said proximal end to said distal end of said catheter, and defined as a triangular cross-section lumen, whereby at the vertexes of the triangular cross-section, a steering cable is provided to guide said distal end of the catheter, whereby in a space between the sides of the triangular cross-section of said common energy lumen and walls of said flexible body there are three independent peripheral lumens each having a curved cross-section, each of said peripheral lumens forming a conduit extending to said proximal end of said flexible body for transferring a substance selected from the group consisting of drugs, liquids, and dyes to the target tissue, whereby in a central position of the interior of said common energy lumen there is a central lumen containing a guiding wire; said common energy lumen further containing at least two energy elements adapted to transfer energy to the surroundings of the target tissue to interact with the administrated drug, said energy elements further defined as having at least one conductive wire adapted to be connected to a radiofrequency source with the selected connection devices, such as a connector and, along said common energy lumen to said distal end of the catheter, and at least one electrode positioned on or near said end of the distal end of the catheter, and at least one fiber optic cable adapted to be connected to a laser source by means of the selected connection devices, such as a connector and, along said common energy lumen to said distal end of the catheter. |
