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Abstract

An improvement to an apparatus for receiving a sample of biological fluid containing non-fluid components. Prior art sample cell for use in conjunction with prior art analytical apparatus comprises two slidably engaged members, first member comprising a reservoir for holding fluid sample to be tested, second member adapted to receive fluid from an external filter in one section and adapted to receive reagent and exhibit reaction in another section. The improvement comprises means for preventing smearing of fluid when members are moved relative to each other. A channel collects overflow from reservoir in first member, conducting overflow to a barrier placed in gap between first and second member. A wiper shears excess fluid from behind barrier, generally out of gap between first and second member, when the first and second members are moved relative to each other.

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First Claim