摘要:
Methods of forming support layers for use in catheters using having a support layer included, and stents incorporating coatings of photosensitive polymerizable resins and stents including fibers coated with photosensitive polymerizable resins. A fiber is coated with a PPC resin and incorporated into a support structure for a catheter. Portions of the PPC are polymerized by exposure to light of a desired wavelength, causing increased rigidity and strength to the polymerized portions. As the PPC is polymerized, the fibers coated by the PPC resins become stronger and change the flexibility of devices incorporating such fibers. Additional embodiments include stents incorporating PPC coatings and methods of using such stents, including polymerizing a PPC coating after inserting a self-expanding or balloon-expandable stent.
摘要:
According to an aspect of the present invention, implantable or insertable medical devices (also referred to as internal medical devices) are provided. These medical devices include at least one machined layer, at least a portion of which is disposed over at least one underlying region (e.g., a therapeutic agent containing region, a catalytic region, etc.). The at least one machined layer contains a plurality of excavated regions which promote the transport of molecular species across the machined layer. An advantage of the present invention is that medical devices are provided, in which the transport of species into the medical device, out of the medical device, or both are controlled, and may be customized, as desired.
摘要:
A medical device having a catheter shaft having a distal portion and a proximal portion, a medical balloon co-axially mounted on the distal portion of the catheter shaft and a tubular mesh wrapped around the balloon, wherein the mesh strengthens and reinforced the balloon and may be manipulation to dictate the shape of the balloon and to squeeze the balloon down onto the catheter shaft during deflation of the balloon.
摘要:
Medical devices, for example, those that have balloons, and methods of making the devices are described. In some embodiments, a method includes providing a medical balloon having a first cone portion and a body portion, and removing material from an outer surface the body portion of the balloon such that the balloon includes a first region and a second region, the first region being recessed relative to the second region.
摘要:
A closure device or system seals or closes an opening in a body cavity. The closure device is deployed proximate to an entry site to the body cavity. A needle or instrument is inserted through the closure to form an incision through the body wall to insert a treatment device or instrument. Following withdrawal of the treatment device or instrument, the closure device seals or closes the incision.
摘要:
A tubular, expandable prosthesis comprises a framework with a plurality of openings therethrough and a carbon nanotube sheet. The carbon nanotube sheet extends across at least one of the openings.
摘要:
A catheter comprises a catheter shaft having a distal tip, the distal tip having an inner surface and an outer surface, the inner surface having a rounded profile. The catheter may be made by rounding the inner surface of the distal tip.
摘要:
A laser shock peening process for producing one or more compressive residual stress regions in a medical device is disclosed. A high-energy laser apparatus can be utilized to direct an intense laser beam through a confining medium and onto the target surface of a workpiece. An absorption overlay disposed on the target surface of the workpiece absorbs the laser beam, inducing a pressure shock wave that forms a compressive residual stress region deep within the workpiece. Medical devices such as stents and guidewires having one or more of these compressive residual stress regions are also disclosed.
摘要:
A catheter assembly comprises a catheter shaft having a device receiving portion, an expandable balloon disposed about the device receiving portion, and a sheath. The sheath has an outer surface and an inner surface defining an inner lumen. The outer surface and inner surface has a sheath wall extending there between. The outer surface has slits therethrough which extend into the sheath wall. The sheath has an expanded state and an unexpanded state such that the sheath maintains the substantially same longitudinal length in the expanded state and the unexpanded state.