Measurement of particles in liquid using reflected light
AssigneeMedical Vision Research & Development AB
InventorsSven Milton, Paolo Massarutti
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Abstract
An improved cassette for detecting and quantifying particles in a liquid is provided. A sample volume of a liquid is held by a housing with an inlet and an outlet for the liquid. Light is emitted across the sample volume and reflected creating a doubled length of the optical path in the sample volume. The probability of detecting particles is increased and the measurement is improved. The housing reduces noise due to air bubbles and improves sensitivity of detection of particles in the liquid sample.
Claims9
A cassette for use in detection of particles in a sample volume of aspirated fluid comprising:
- a housing for holding the sample volume, characterized in that is made of transparent material, said housing comprising at least one inlet opening and at least one outlet opening, and at least one means for forcing air bubbles in the sample volume to the top of said housing, said housing further comprising one reflection area on at least one side of the housing thereby reflecting optical signals through the sample volume in an optical path;
- the housing being configured to create a space of air on top of a pool of liquid of the sample volume.
Dependencies are inferred from the claim text.