G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 1/00 (2006.01) G01N 35/10 (2006.01) G01N 35/06 (1990.01)
Patent
CA 2072397
ABSTRACT OF THE DISCLOSURE When analyzing components in a liquid specimen such as urine by an automatic analyzer, it is necessary to agitate the specimen to be uniform beforehand prior to sampling of specimen. In this case, suction of specimen and discharge of specimen are done at different positions in the specimen container (11). For example, either one of specimen suction and specimen discharge is done in the lower part of the specimen, and the other is done in the upper part of the specimen. Moreover, either one or both of specimen suction and specimen discharge may be done while moving the pipette (10). Furthermore, by detecting the specimen liquid surface, the pipette (10) is moved according to the liquid surface detection information, while sucking the specimen and discharging the specimen. As a result, the liquid specimen such as urine may be efficiently agitated and sucked, and even a large volume of specimen contained in a slender container may be agitated and sucked without bubbling. Besides, the sampling apparatus comprises driving means (25) for varying the position of the pipette (10) when sucking the specimen and discharging the specimen, and air bubble detecting device (55) composed of a set of electrodes (50), (52) disposed in the midst of specimen suction line (L), and a detecting circuit (53) for detecting the difference of electric impedance (Ra) between these - 31 - electrodes. Hence, the liquid specimen such as urine may be efficiently agitated and sucked, and even a large volume of specimen contained in a slender container can be agitated and sucked without bubbling, and still more the presence or absence of specimen may be detected by detecting the air bubble, so that an apparatus for agitating and sucking liquid specimen of a high reliability is realized. - 32 -
Ohyama Masaki
Ueno Hiroyuki
Kirby Eades Gale Baker
Toa Medical Electronics Co. Ltd.
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