Reduced profile medical balloon element
1. An axially restrained-shrunk catheter balloon.
Medical dilatation balloons comprise a polymer that has the attribute of memory, and/or is crosslinked to impart memory. Such balloons exhibit a reduced tendency to overinflate at high inflation pressures. Furthermore, such balloons when shrunk radially by the application of heat while restraining axial shrinkage, exhibit customizable linear or non-linear compliance curves and lower crosslinking profile relative to the same balloon when unshrunk. Also disclosed is an expansive element within a tube whose outer diameter is equal to the outer diameter of the tube from which it was made. In addition, disclosed are (a) processes for preparing crosslinkable polymers, (b) joining crosslinked balloons to catheter systems, (c) forming shrunk balloon elements, and (d) forming an expansive element within a tube whose outer diameter is equal to the outer diameter of the tube from which it was made.
- 1. An axially restrained-shrunk catheter balloon.
- 11. A catheter balloon having a predetermined compliance curve that is attained at least in part by axially restrained shrinkage of the balloon.
- 20. A compliant or semi-compliant catheter balloon for inflation to a pressure of between P1 and P2, wherein the balloon is formed from a polymer that is crosslinked such that the balloon has a reduced compliance in a pressure range of 70% of P2 up to P2.
- 26. A method of manufacture of a medical device for dilation of a hollow anatomic structure, comprising a step of (1) forming a balloon from a polymer material, and (2) heating the balloon while axially restraining and radially shrinking to form an axially restrained-shrunk balloon.
- 32. A stent with a substantially continuous outer surface comprising a polymer material with expansion memory in a configuration that radially expands the stent when the stent is heated from a first to a second temperature, and wherein the configuration is obtained by radial compression.