Resources Contact Us Home
Porous medical catheter and methods of manufacture

Image Number 7 for United States Patent #7175734.

The present invention relates to fabrication methods and apparatus for irrigating medical catheters. Such catheters include at least one section of standard thermoplastic catheter tubing coupled to a section of porous tubing (e.g., ePTFE and the like). A source of fluid couples to the porous portion of tubing to dispense diverse fluids. The manufacturing technique overcomes the inability of such porous material to liquefy and/or bond to most available adhesives by creating a mechanical-based coupling. One aspect of the present invention involves pre-treatment of a portion of a porous material such as ePTFE; that is, a "pre-imbibing" process is employed wherein the ePTFE is saturated with a solution of solvent and dissolved thermoplastic resin. After the solution evaporates a resin-based interstitial residue provides suitable structure that fuses to adjacent thermoplastic material during application of heat, such as during thermal bonding. The present may be used to prepare virtually any porous material for thermoplastic bonding.

  Recently Added Patents
Wafer-level chip scale package
Rotation angle detecting device
Semiconductor device
Electrophotographic photoreceptor, image-forming apparatus, and electrophotographic cartridge
Flame retardant thermoplastic elastomers
Low drop-out regulator providing constant current and maximum voltage limit
Low powered activation arrangement and method thereof
  Randomly Featured Patents
Control expansion for conventionally powered model railroads
Passive infrared intruder detection system
Method and apparatus to monitor position of a rotatable shaft
Environmentally sealed grounding backshell with strain relief
Method and device for holding substrates on a transport belt of a printing press
Apparatus and method for visually detecting wear to insert bowls, bushings, and spiders
Windshield wiper structure with freeze resistance joints
Saw demodulator employing corrective feedback timing
Dielectric ceramic materials with insulated boundaries between crystal grains, and process for preparation
Device for feeding a string loop for attachment to a sausage casing