摘要:
An apparatus and method for molding balloon catheters is disclosed. The balloon may be molded by providing a polymeric tube within a mold having an interior cavity in the shape of the desired balloon. Microwave energy, which may be generated by a gyrotron, may then be directed toward the mold, to heat the polymeric material without heating the mold. Once heated, pressurized fluid may be injected into the tube to blow the polymeric material against the interior cavity whereupon the material can cool to form the balloon or can be further heatset by additional microwave energy and be cooled to form the balloon. In accordance with one embodiment, microwave energy can also be used without a mold to form a medical device.
摘要:
A catheter having a catheter shaft and a medical balloon mounted thereon. The medical balloon having a non-inflated state and being inflatable to an inflated state. The medical balloon having a stent mounting region, with a stent being disposed about at least a portion of the stent mounting region. The stent mounting region having a middle portion, a first end portion adjacent to the middle portion and a second end portion adjacent to the middle portion. The middle portion having a middle portion diameter, the first end portion having a first end portion diameter, the second end portion having a second end portion diameter. In the non-inflated state the middle portion diameter being different from the first end portion diameter and the second end portion diameter, in the inflated state the middle portion diameter being substantially the same as the first end portion diameter and the second end portion diameter.
摘要:
An inflatable medical balloon for multiple procedures, including angioplasty procedures, procedures for delivering medical devices, such as stents, and a method of making the catheter systems. The catheter system employs a balloon having a plurality of flexible portions and a combination of hard and soft portions.
摘要:
A catheter for delivery of a prosthesis comprises an expandable member which includes a portion which foreshortens longitudinally upon radial expansion of the expandable member.
摘要:
A stent includes a main body of a generally tubular shape for insertion into a lumen of a vessel of a living being. The tubular main body includes a substantially biodegradable matrix having collagen IV and laminin that enclose voids within the matrix. The tubular main body also includes a biodegradable strengthening material in contact with the matrix to strengthen the matrix. The tubular main body is essentially saturated with drugs.
摘要:
The present invention relates generally to elongate support members, preferably for use with a catheter for performing medical procedures including percutaneous transluminal coronary angioplasty. An elongate support member, comprising a proximal end, a distal end, is disclosed. The proximal end of the elongate support member, is formed to define a plurality of flanges. A linkage connects the flanges, and a lumen within the shaft defined by connecting the flanges. The elongate support member comprises an improved catheter shaft design that maintains pushability, flexibility, and torquability while limiting the kinking.
摘要:
The invention relates to a medical device, such as a stent or a balloon catheter that includes an expandable body portion which has an exterior surface that contacts a vessel wall during treatment. The medical device includes a first coating disposed over at least a portion of the exterior surface. The first coating includes a therapeutic substance that is intended for controlled release from the exterior surface. The medical device further includes a second coating overlaying at least a substantial portion of the first coating. The second coating includes a material that is generally impervious to elution of the therapeutic substance therethrough when the body portion is inserted into the vessel lumen. The material of the second coating is relatively inelastic so that the second coating fractures during expansion of the body portion to allow elution of the therapeutic substance through fissures formed in the second coating.
摘要:
The present invention relates to a medical device for insertion into the body wherein the device has at least one surface which periodically comes into contact with a second surface. The first surface comprises an improved lubricious coating having a first hydrogel layer and a second hydrophobic top coating which prevents the hydrogel coating from prematurely absorbing too much moisture. The hydrophobic top coating comprises at least one hydrophilic surfactant which acts as a carrier to facilitate removal of the hydrophobic top coating upon entry into an aqueous environment.
摘要:
A stent delivery system which utilizes a stent delivery catheter to deliver a stent into a body lumen. The stent delivery catheter being equipped with at least one stent retaining sleeve. The at least one stent retaining sleeve having an inside surface and an outside surface. The inside surface, outside surface, or both, having a coating which is lubricious.