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Blood gas catheter

  • US 4,016,864 A
  • Filed: 09/08/1975
  • Issued: 04/12/1977
  • Est. Priority Date: 08/01/1974
  • Status: Expired due to Term
First Claim
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1. A device for sampling gases dissolved in the blood of a living subject, comprising in combination:

  • a catheter having distal and proximal ends,means disposed at the distal end of said catheter comprising a tubular gas permeable membrane primarily of material highly permeable to gas but substantially impermeable to blood, constructed for insertion through a cannula percutaneously into the blood vessel in a direction extending along the principal axis thereof, said tubular membrane including a continuous gas permeable conduit, at least a portion of the lateral walls of said conduit being constructed and arranged during percutaneous deposition of said tubular membrane to make contact with the blood of said subject,means comprising a housing at the proximal end of said catheter including input and output gas receptacles respectively constructed and arranged for connection in circuit relation to a source of carrier gas at said input receptacle and to gas receiving means at said output receptacle,said conduit having input and output terminals respectively connected through separate connecting means to said input and output gas receptacles.

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