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Catheter device and system for continuous chemical analysis of body fluids in vivo

  • US 4,265,249 A
  • Filed: 07/28/1978
  • Issued: 05/05/1981
  • Est. Priority Date: 07/29/1977
  • Status: Expired due to Term
First Claim
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1. A catheter for use with a system for obtaining body fluids from fluid carrying members for a continuous chemical analysis thereof comprising:

  • (a) an elongated solid body portion having at least three ducts disposed therein, each said ducts being provided with an entrance at one end of said body portion and providing a fluid flow path to the surface of said body portion;

    (b) a semi-permeable membrane filter means circumscribing said body portion and supported thereby, leaving at least one of said ducts uncovered, said membrane being permeable to the substances to be analyzed and impermeable to high molecular weight and corpuscular portions of said fluids;

    (c) continuous channel means formed on the surface of said body portion for communicating with at least two of said ducts to provide a continuous fluid flow path, said membrane means covering said channels.

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