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Biological fluid measuring device

  • US 4,994,167 A
  • Filed: 07/07/1988
  • Issued: 02/19/1991
  • Est. Priority Date: 04/15/1986
  • Status: Expired due to Term
First Claim
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1. A biological fluid measuring device comprising:

  • (a) a main housing including electronic circuit means associated with at least two electrodes;

    (b) a disposable cartridge having a homogeneous, monolithic membrane and being removably mounted on the housing with the membrane operably associated with the electrodes, the cartridge including means for protecting the membrane when not in use and means for maintaining the membrane in operative association with the electrodes at the electrode-membrane interface by osmotic pressure during storage and use, the maintaining means including an osmotic agent which does not permeate the membrane; and

    (c) means for supporting the electrodes so that the supporting means, the electrodes, the maintaining means and the membrane are in operative contact to provide an electrode assembly.

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