摘要:
A medical device such as a catheter, stent or balloon, is formed by depositing a radiation curable composition on a form made of ice or wax. The deposited composition may be cured by irradiation, suitably with UV light. Complex structures can be built up if the deposition or curing is achieved imagewise. Compositions which photocure to polyester, polyamide or polyimide may be employed. A particular structure is a balloon for a rapid exchange catheter which has a guide wire lumen passing through the balloon cone walls.
摘要:
Medical device polymeric tubing segments suitable for forming catheter shafts or as balloon parisons are formed with discrete regions having different orientation relative to each other. Wall thickness may also be varied of the length of the segment.
摘要:
Medical devices such as endoprostheses (e.g., stents) containing one or more biostable layers (e.g., biostable inorganic layers) and a biodegradable underlying structure are disclosed.
摘要:
The invention generally relates to internal (e.g., implantable, insertable, etc.) drug delivery devices which contain the following: (a) one or more sources of one or more therapeutic agents; (b) one or more first electrodes, (c) one or more second electrodes and (d) one or more power sources for applying voltages across the first and second electrodes. The power sources may be adapted, for example, to promote electrically assisted therapeutic agent delivery within a subject, including electroporation and/or iontophoresis. In one aspect of the invention, the first and second electrodes are adapted to have tissue of a subject positioned between them upon deployment of the medical device within the subject, such that an electric field may be generated, which is directed into the tissue. Furthermore, the therapeutic agent sources are adapted to introduce the therapeutic agents into the electric field. In another aspect, the therapeutic agent sources are polymeric regions that contain one or more types of ion-conductive polymers and one or more types of charged therapeutic agents. In yet another aspect, the therapeutic agent sources are polymeric regions that contain one or more types of electrically conductive polymers and one or more types of charged therapeutic agents.
摘要:
Medical device polymeric tubing segments suitable for forming catheter shafts or as balloon parisons are formed with discrete regions having different orientation relative to each other. Wall thickness may also be varied of the length of the segment.
摘要:
According to an aspect of the present invention, implantable or insertable blood-contacting devices are provided, which contain one or more release regions that release nitric oxide and one or more anti-restenotic agents. The release region contains one or more polymeric components. The release region also optionally contains one or more inorganic components. Nitric oxide producing groups may be attached to the polymeric component(s), to the optional inorganic component(s), or both. The one or more anti-restenotic agents may be admixed with the polymeric and optional inorganic components, attached to the polymeric component(s), attached to the optional inorganic component(s), or a combination thereof.
摘要:
A medical system including an elongate member and an elongate element associated with the elongate member so that a shape of the elongate member can be altered upon applying energy to the element.
摘要:
The invention generally relates to internal (e.g., implantable, insertable, etc.) drug delivery devices which contain the following: (a) one or more sources of one or more therapeutic agents; (b) one or more first electrodes, (c) one or more second electrodes and (d) one or more power sources for applying voltages across the first and second electrodes. The power sources may be adapted, for example, to promote electrically assisted therapeutic agent delivery within a subject, including electroporation and/or iontophoresis. In one aspect of the invention, the first and second electrodes are adapted to have tissue of a subject positioned between them upon deployment of the medical device within the subject, such that an electric field may be generated, which is directed into the tissue. Furthermore, the therapeutic agent sources are adapted to introduce the therapeutic agents into the electric field. In another aspect, the therapeutic agent sources are polymeric regions that contain one or more types of ion-conductive polymers and one or more types of charged therapeutic agents. In yet another aspect, the therapeutic agent sources are polymeric regions that contain one or more types of electrically conductive polymers and one or more types of charged therapeutic agents.
摘要:
An implantable medical device for releasing therapeutic agent having a medical device body and a plurality of reservoir-defining structures disposed on a surface of the body. A reservoir can be defined by the reservoir-defining structures and therapeutic agent may be located in the reservoir. A cover may extend over the reservoir so that the therapeutic agent is released from the reservoir when the medical device implanted. Methods for making the medical device may also include providing a medical device body, positioning a plurality of reservoir-defining structures on a surface of the body to form a reservoir, loading therapeutic agent into the reservoir, and covering the reservoir so that the therapeutic agent may release when the medical device is implanted. Alternatively, the reservoir may be covered with a cover and an opening formed in the cover so that the therapeutic agent may release when the medical device is implanted.