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CO.sub.2 diagnostic monitor with rupturable container

  • US 5,156,159 A
  • Filed: 04/09/1990
  • Issued: 10/20/1992
  • Est. Priority Date: 10/11/1988
  • Status: Expired due to Fees
First Claim
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1. A self-contained diagnostic monitor for screening the CO2 content of a gas exiting a patient during endotracheal or esophageal intubation comprising:

  • a plurality of portions of compositions having an initial pH in solution above about 3.8 and which substantially change color in solution in response to exposure to CO2, each of said composition portions being within a reservoir constructed substantially of a substantially transparent material for exteriorly viewing said color change;

    an opening adapted for communication only with said gas exiting and entering said patient during endotracheal or esophageal intubation; and

    a plurality of semipermeable membrane portions which are permeable to CO2, each membrane portion separating at least one composition portion from said exiting and entering gases, and wherein said plurality of composition portions require a different time of exposure of CO2 to effect said change in pH thereby causing said color change.

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