摘要:
A method of molding the main body of a Y-adapter that has a straight passageway extending from one extremity to the other and an arcuate passageway that is generated along the arc of a circle. Core pins for the straight and arcuate passageways are placed in a mold such that they merges together to form a single, smooth lumen in the Y-adapter. The arcuate core pin can be withdrawn from the finished Y-adapter as a result of its circular arc.
摘要:
A guide catheter in which the components of the hub include a ratchet mechanism that is operative to lock the hub components together and compress an integral flange of the catheter shaft therebetween to form a seal between the hub and catheter shaft without the use of bonding agents that will not become loosened accidently or inadvertently.
摘要:
A medical device has a catheter with a proximal portion, a distal portion, a shaft and an expandable member located at the distal portion. The expandable member is constructed and arranged for expanding the outer diameter of the catheter from a contracted state to an expanded state. A removable sleeve is positioned around the entire length of the expandable member. The sleeve has a first end and a second end, and an inner diameter that increases over the entire length of the sleeve.
摘要:
A method and apparatus is provided for forming a fusion bond between two materials such as two components of a catheter. The method begins by forming a bond site by positioning a portion of a first body with respect to a portion of a second body so that a fusion bond site is formed. A laser beam is generated that has an intensity profile across its width. The laser beam is directed onto at least a portion of the first and second bodies within the bond site so that a fusion zone having an increased temperature is formed. After the laser beam is generated, the intensity profile of the laser beam that is directed onto the bond site is controllably adjusted by an optical element such as a dynamically-adjustable beam shaping element.
摘要:
Percutaneous treatment of aortic aneurysms and like vascular anomalies by an apparatus and method wherein the apparatus is delivered via catheter and comprises a sleeve with at least one peripheral conduit which is caused to assume an expanded, rigid configuration by the introduction of a chemical or mechanical hardening means, whereby the sleeve is caused to assume an open cylindrical configuration for fluid flow therethrough.
摘要:
Medical device balloons are formed from a tubular parison by a process or apparatus which establishes a controlled location (initiation zone) on the parison where radial expansion is initiated. Initiation within the initiation zone is achieved by heating the parison in that location to a higher temperature than the remainder of the parison for at least a portion of the blowing time. A variety of apparatus configurations are provided, some of which allow for the size and location of the initiation zone to be readily reconfigured. Balloons can also be modified, post-blowing, using heating apparatus and methods described.
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:
A memory module includes a memory module controller to be coupled to a system memory controller by a system memory bus and a plurality of memory devices coupled to the memory module controller, where signaling between the memory module controller and one or more of the memory devices is independent of signal loading or operating voltage of the system memory bus.
摘要:
A balloon catheter is provided having an expandable distal portion and balloon protector comprising a first removable sleeve, and an optional second removable (outer) sleeve positioned over the inner sleeve, the second (outer) sleeve having a constrictive relationship with the first (inner) sleeve, said first and second sleeves being removed prior to use of the catheter. The first sleeve may have a variable inner diameter.