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
Wearable display device
Photon density wave based determination of physiological blood parameters
Process for producing liquid crystal element, and liquid crystal element
Semiconductor device element formed on SOI substrate comprising a hollow region, and having capacitors in an electric field alleviation region
Auto-aligning spectroscopy system
Solid-state image pickup element, method of manufacturing the same, and image pickup apparatus including the same
Two dimensional magnetic sensor immune to skew angle misalignment
  Randomly Featured Patents
Availability and scalability in clustered application servers by transmitting expected loads of clients to load balancer
Timepiece having case formed of rock-like material
Target attachment assembly
Sensitivity controls for blood serology prepared from modified cells
Apparatus for visualizing and determining holding pattern and entry
Operation input device, operation evaluation method, recording medium, and program
Offshore hydrocarbon production system
Multibyte error correcting system involving a two-level code structure
Method for the organoleptic and surface modification of ready-made items of clothing and machine for carrying out the method
Ski/pole carrier apparatus