Method and apparatus for preparation of liquids containing...

G - Physics – 01 – N

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73/124, 150/14

G01N 1/14 (2006.01) B01L 3/00 (2006.01) B01L 3/14 (2006.01)

Patent

CA 1051222

ABSTRACT OF THE DISCLOSURE This invention relates to a method and apparatus for accurate, reproducible examination of urine specimens and the like. In the field of clinical testing, the analysis of urine samples is carried out as a common routine to determine, for example, the amounts of sugar, albumin, and solids present in the specimen obtained from a patient. The procedures carried out in the performance of a urin- alysis are well known but require utmost care and skill. The present invention provides a method and apparatus for sample preparation to achieve accurate and reproducible microscopic examination. The apparatus includes an elon- gated container with an open end, the internal cross section of the container being tapered to a smaller area near the closed end, and an elongated tube having, in one preferred embodiment, a hollow chamber of increased cross section near one end of the tube. The tube is insertable in the container so that the outer periphery of the chamber sealingly engages the inner wall of the container to seal a predetermined volume of liquid at the closed end of the container. The tube has an open lower end protruding into the predetermined volume of liquid, and has a sealed upper end fitted with a resilient bulb to facilitate with drawl of the liquid into the hollow chamber. A sealing collar may be employed instead of the hollow chamber, and the sample liquid is withdrawn into the tube itself.

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