摘要:
Medical devices that are formed from a polymeric matrix including a first polymer and a functionalized polymer are provided. The medical devices may include a functionalized polymer such as maleic anhydride functionalized polymer. The burst strength and/or the hoop strength of the medical devices including the functionalized polymer may be greater than the burst strength and/or the hoop strength of control medical devices. However, the durometer of the medical devices may be substantially equal to the durometer of the control medical devices. Methods of manufacturing medical devices including a functionalized polymer are also provided.
摘要:
A urinary catheter and materials for making a urinary catheter having mechanical properties, such as stiffness and flexibility, which are stable over a range of temperatures.
摘要:
An expandable medical balloon (10), comprising a balloon, the balloon comprising a cone portion (14A, 14B), a waist portion (16A, 16B) and a body portion (12) and a fiber braid (20) disposed along the cone portion, the waist portion and the body portion of the balloon, the fiber braid comprising a first fiber (21) and a second fiber (22) that is different than the first fiber, the first fiber comprising a polymer material having a first melting temperature and the second fiber is a non-melting fiber.
摘要:
A catheter is provided, such as for distal neurovascular access or aspiration. The catheter includes an elongate flexible body, having a proximal end, a distal end and a side wall defining a central lumen. A distal zone of the side wall includes a tubular inner liner, a tie layer separated from the lumen by the inner liner, a helical coil surrounding the tie layer, adjacent windings of the coil spaced progressively further apart in the distal direction. An outer jacket surrounds the helical coil. The outer jacket is formed from a plurality of tubular segments positioned end to end, coaxially about the coil. The flexural load profile of the catheter as a function of catheter length is configured to provide enhanced distal flexibility while maintaining high backup support.
摘要:
[0058] An intravenous delivery system may have a plurality of components with interior surfaces that cooperate to define a fluid pathway through which fluid flows into a body of a patient. One or more anticoagulant coatings may reside on one or more of the interior surfaces to restrict blood clot formation in the fluid pathway. Manufacture of the intravenous delivery system may commence with provision of the components and preparation of an anticoagulant solution. The one or more interior surfaces may be exposed to the anticoagulant solution to form the anticoagulant coating. The anticoagulant coating may be caused to adhere to the one or more interior surfaces. The anticoagulant solution may be prepared by dissolving a triblock copolymer, such as PEO-PPO-PEO or PEO-PBD-PEO, in water. Irradiation may be applied to the anticoagulant coatings and interior surfaces to form covalent bonds.
摘要:
The present invention relates to a method of making a composition, the composition comprising a cross-linked polymer and water, comprising at least the following steps: a) providing a first mixture, comprising at least one polymer and an aqueous alkaline solution; b) generating a gel by cross-linking the at least one polymer with a cross- linking agent; c) neutralizing the generated gel by using a neutralization solution; d) optionally adding a second mixture, comprising a cross-linked and/or non-cross- linked polymer and water, to the neutralized gel obtained in step c); e) dialyzing the gel obtained in step d) or dialyzing the gel obtained in step c) and optionally subsequent addition of the second mixture, comprising a cross-linked and/or non-cross-linked polymer and water; and f) filling the dialyzed gel obtained in step e) into a container, wherein at least two or three or four or five or all of steps a) to f) are automated.
摘要:
An immunotherapy delivery device is provided including a catheter and a pressure modulating device fixed adjacent the distal end of the catheter. In accord with aspects of the device, the lumen of the catheter is coated to facilitate delivery of a healthy immunotherapy agent. A method for delivering an immunotherapy agent to a tumor includes advancing the delivery device into a vessel of a patient, and infusing the agent under pressure into the vessel to penetrate the tumor. The delivery device prevents reflux of the agent toward non-treatment sites.
摘要:
The present disclosure relates to a coating for medical devices. The lubricious coating includes a primer layer and a top coating layer as well as methods of making and using the same. The primer layer includes a reaction cured product of a multifunctional acrylate and an acid functionalized monoacrylate. The top coating layer includes a reaction cured product of a mixture that includes a hydrophilic polymer comprising polyvinylpyrrolidone, an acid functionalized monoacrylate, and a hydrophilic monomer. The lubricious coating may be coated onto medical devices to form a sensing guide wire, an ultrasound imaging device, and an intravascular imaging device. Associated devices and methods are also provided.
摘要:
Ein Schlauch (10; 10'; 10") für einen medizinischen Behälter weist eine aus mindestens zwei Schichten bestehende Schlauchwand auf. Erfindungsgemäß enthält mindestens eine Schicht ein Styrol-haltiges thermoplastisches Polymer (S-TPE), insbesondere ein Styrol-Butadien-Block-Copolymer (SBC) oder ein Copolyester, ein Copolyesterether oder ein Cyclo-Olefin-Copolyester. Die mindestens eine andere Schicht enthält Ethylen-Vinylacetat-Copolymer (EVA), vorzugsweise mit einem Vinylacetat(VA)-Anteil im Ethylen-Vinylacetat-Copolymer von 10 % bis 30 %, vorzugsweise 14 % bis 28 %. Das EVA kann zur Verbesserung der Schlaucheigenschaften mit einem Thermoplastischen Polybuten und/oder SEBS abgemischt werden. Die Schlauchwand kann einen zweischichtigen Aufbau mit einer inneren (16) oder einer äußeren (12), das S-TPE, Copolyester, Copolyesterether oder Cyclo-Olefin- Copolyester enthaltenden Schicht, oder einen dreischichtigen Aufbau mit einer jeweils das S-TPE oder Copolyester oder Copolyesterether enthaltenden, äußeren (12) und inneren (16) Schicht aufweisen.
摘要:
The present disclosure includes an expandable medical device (104) and outer sheath (120) combination. The outer sheath is capable of being split to form multiple sheath sections (230, 232) that may be peeled back to expose a portion or all of the expandable medical device. The medical device, as well as the outer sheath, may include one or more therapeutic agents for delivery to a treatment area within a patient.