Resources Contact Us Home
Porous medical catheter and methods of manufacture

Image Number 5 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
Method, base station and system for adjusting cell wireless configuration parameter
Behavioral fingerprint based authentication
Switching device, switch control method, and storage system
Ventilated vacuum commutation structure
Guitar strap attachment means
Portable reading device with mode processing
Voltage regulators with improved wake-up response
  Randomly Featured Patents
Methylation of toluene
Notebook computer
Systems and methods for imbedded intramuscular implants
Marine time-lapse seismic surveying
Water pump for cooling engine
Portable food vessel
Hair remover
Network traffic director system having modules that implement merit or penalty functions involving stochastic changes in network topology
Fish tank aquarium light hood
Anode holder