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Coagulation detection by plunger sensing technique

  • US 4,599,219 A
  • Filed: 10/15/1982
  • Issued: 07/08/1986
  • Est. Priority Date: 10/15/1982
  • Status: Expired due to Term
First Claim
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1. A cartridge in which to conduct a coagulation-related analytical test on fluid, comprising:

  • a tube-like member having an open interior extending generally axially therethrough from an open lower end to an upper end;

    a partition of the tube-like member located within the open interior at a position intermediate the upper and lower ends of the tube-like member, said partition generally dividing the open interior into a lower chamber between the partition and the lower end and into an upper chamber between the partition and the upper end;

    a passageway defined by and extending through the partition to allow fluid communication between the lower chamber and the upper chamber;

    a plug member extending across the open interior of the lower chamber and sealing the open end of the lower chamber at a position spaced from the partition;

    means for initially sealing the passageway to fluid communication therethrough and for subsequently selectively opening the passageway to fluid communication therethrough; and

    a plunger assembly extending into the upper chamber, said plunger assembly adapted to be reciprocated within the tube-like member and includes means by which to operatively contact and move said plunger assembly in a generally axial direction while permitting descent by force of gravity during analytical test.

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