Resources Contact Us Home
Porous medical catheter and methods of manufacture

Image Number 8 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
Optical imaging device and imaging method for microscopy
Information processing device and display control method
Liquid formulations of carboxamide arthropodicides
Printing apparatus
Layout design defect repair based on inverse lithography and traditional optical proximity correction
Methods for testing OData services
Keypad assembly for electronic devices
  Randomly Featured Patents
Roller changer
Method and apparatus for jet printing a flux pattern selectively on flip-chip bumps
Support for components of an automatic focusing system
Salvia plant named `Rose Fountains`
Treatment of fabric comprising cotton or keratinous fibers for shrink resistance
Belt buckle
Manufacture of polymers of net-shaped structure
Golf putter head
Transmission bandwidth and memory requirements reduction in a portable image capture device
Bottle tote