Resources Contact Us Home
Catheter set

Image Number 2 for United States Patent #4451256.

In order to keep the opening for inserting a catheter into a blood vessel as small as possible, a catheter insertion tube is used which coaxially surrounds the puncturing canula and consists, at least in a circumferential area and/or at least along a portion of its length, of one or several dilatable or expandable areas permitting enlargement of its internal diameter. The diameter of the catheter insertion tube, at the front end where it is inserted into the blood vessel, is approximately equal or smaller than the outer diameter of the catheter. The catheter insertion tube is expandable at least over the front or forward portion of its length by the catheter. The catheter insertion tube i removable from the puncture over the catheter while the catheter is advanced into the puncture and is tighty sealed by the catheter because the catheter has an external diameter equal to or larger than the puncture previously occupied by the insertion tube.

  Recently Added Patents
Frothable aqueous composition for use in a carpet backing composition
Image forming apparatus and warming up method thereof
Floribunda rose plant named `KORamflusa`
Nonvolatile semiconductor storage device and a manufacturing method thereof
Base station device and wireless communication method
Controlling generation of debug exceptions
  Randomly Featured Patents
Method and measuring instrument for determining the position of an edge of a pattern element on a substrate
Solar powered engineless vehicle
Method of producing an active composite
Gelling system for hydrocarbon fluids
Paper guide adjusting mechanism and office machine using such mechanism
Digital diode phase shifter elements
Wiper blade with metal strip as tilting bar
Radar system having amplitude and phase modulation and demodulation circuits
External device document input and output device and external device document input and output method
Staged vaporization of liquid hydrocarbon fuels