摘要:
The invention provides compositions for the inhibition of bacterial adhesion. The composition can include nanocrystalline cellulose (NCC) and a water-soluble polymer, which form an NCC hydrogel in water. The NCC hydrogel can be used to treat or coat devices such as a catheter, whereby the NCC hydrogel inhibits bacterial adhesion to the catheter surface to thereby inhibit biofilm formation and growth of bacteria on the catheter surface. The compositions and devices can thus be useful for inhibiting or preventing conditions such as urninary tract infections.
摘要:
One embodiment is directed to a system for deploying a device to a distal location across a vessel, comprising an elongate introducer sheath tubing member comprising open-cell fibrous wall material defining a lumen therethrough, wherein in a collapsed configuration the sheath has a first cross-sectional outer diameter and a first lumen inner diameter, and in an expanded configuration, the sheath has a second cross-sectional outer diameter and a second lumen inner diameter; and a substantially non-porous expandable layer coupled to a proximal portion of sheath and configured to prevent fluids present in the lumen from crossing the fibrous wall material.
摘要:
Antimicrobial and antithrombogenic polymer or polymeric blend, compounds, coatings, and materials containing the same, as well as articles made with, or coated with the same, and methods of making the same exhibiting improved antimicrobial properties and reduced platelet adhesion. Embodiments include polymers with antimicrobial and antithrombogenic groups bound to a single polymer backbone, an antimicrobial polymer blended with an antithrombogenic polymer, and medical devices coated with the antimicrobial and antithrombogenic polymer or polymeric blend.
摘要:
Elongate, flexible catheter includes an elongated shaft having a proximal end, a distal end, and a lumen defined therein. The shaft includes a tubular member having an outer layer and an inner layer. The outer layer includes a first polymer selected from the group consisting of nylon (12), polyether block amide, and combinations thereof. The inner layer includes a second polymer having a heat deflection temperature greater than about 53°C selected from the group consisting of nylon (11), nylon (6), nylon (6,6), nylon (6,12), polyamide-imide, polyetherimide, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyethereetherketone, and combinations thereof. Method of making an elongate, flexible catheter is also provided.
摘要:
Embodiments of the disclosure include lubricious coatings. In an embodiment the disclosure includes a lubricious coating for a medical device including first and second coated layers. The first coated layer is between the second coated layer and the device surface and includes a vinyl pyrrolidone polymer and a photo reactive group. The second coated layer is in direct contact with the first coated layer and is a top coating that includes an acrylic acid polymer. The second coated layer can optionally include photoreactive groups. The coating was found to have a very low number of particulates (e.g., 10 mm or greater) which is very desirable for in vivo use.
摘要:
A flushable catheter having an outer wall defining an inner conduit and an inner core member positioned within the inner conduit. The inner core being made from flushable materials, which are preferably degradable water soluble materials such that the inner core degrades as urine or water pass through the inner conduit defined by the outer wall.
摘要:
The invention is directed to delivery medical devices that enable consistent "on-demand" delivery of therapeutic agents to a vessel. The medical device of the current invention comprises retractable sheath comprising neckable elements. The medical device of the current invention comprises an expandable member, a hydrophilic coating comprising at least one therapeutic agent about the expandable member or structural layer and a retractable outer sheath with a selectively permeable microstructure. The design and methods disclosed herein ensures that therapeutic agent delivery occurs essentially only during retraction of the outer sheath, minimizing coating and/or therapeutic agent loss to the bloodstream and providing controlled delivery to the treatment site.
摘要:
A medical balloon (24,30)for a balloon catheter (10)is described. The balloon(30)has at least a first layer (40)made from a first material and a second layer (42)made from a second material, said first (40)and second (42)layers being in overlying relationship with one another and being integral with one another; wherein the first layer (40)has a softening or melting temperature which is higher than a softening or melting temperature of the second layer (42). A method of forming the medical balloon (30)is also described, including locating a raw tubing(131)in a mould(112); preheating and inflating the raw tubing (131)so as to cause it to stretch; heating the raw tubing (131)to soften or melt the second layer(42); setting the inflated raw tubing (131)to form the medical balloon(30); and cooling the set balloon(30).
摘要:
The present invention relates to preparation of a polymer coating comprising or consisting of polymer chains comprising or consisting of units of 2-methoxyethyl acrylate synthesized by Surface-Initiated Atom Transfer Radical Polymerization (Sl ATRP) such as ARGET SI ATRP or AGET SI ATRP and uses of said polymer coating.
摘要翻译:
本发明涉及一种制剂,其包含或由聚合物链的聚合物涂层,其包含或由通过表面引发原子转移自由基聚合(SL ATRP)合成2-甲氧基乙基丙烯酸酯的单元,例如ARGET的 SI ATRP或AGET SI ATRP以及所述聚合物涂层的用途。 p>
摘要:
A multi-layered dimensionally recoverable tubing system (100) and method for making the same, in which the system has a first layer (103), a second layer (105), and a reinforcing structure (107). The first layer includes at least one crosslinkable polymer. The second layer is disposed adjacent to the first layer and includes a polymer. A reinforcing structure is disposed adjacent to the first layer. One or both of the first layer and second layer are dimensionally recoverable. The first layer is substantially crosslinked, and the second layer is substantially uncrosslinked. To form a reinforced medical device, the system is heated and dimensionally recovered, where the reinforcing structure becomes incorporated in the second layer.