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Instruments for use in the measurement of gases in body fluids

  • US 4,274,417 A
  • Filed: 09/18/1979
  • Issued: 06/23/1981
  • Est. Priority Date: 09/22/1978
  • Status: Expired due to Term
First Claim
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1. An instrument for use in the measurement of gases in body fluids comprising a flexible catheter having an inner tube within an outer tube, the tubes being of such diameters that there is a substantially cylindrical passage between the tubes;

  • sealing means to seal the cylindrical passage at each end of the catheter;

    at one end of the catheter a gas permeable closure covering one end of the inner tube, and at the other end of the catheter first connection means to allow connection of the cylindrical passage to a gas flow system and second connection means to allow connection of the inner tube to a gas analysis apparatus.

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