Toa Medical Electronics Co., Ltd.

Masayuki Kobashi

Noriaki Koeda

Satoru Okada

Yoshiteru Mizuno

A dispensing device having a flexible tube provided with a pipetting nozzle at an end, a washing solution supplier supplying washing solution to the flexible tube and the pipetting nozzle, a syringe connected to another end of the flexible tube and a control section for controlling the driving of the syringe. The control section of the present invention includes a syringe driving compensator by which the washing solution is supplied into or discharged out of the syringe in an amount compensate for the variation in the inner volume of the tube caused by reduction in the liquid pressure when the washing solution is transmitted from the washing solution supplier into the flexible tube. The liquid surface of the washing solution contained in the pipetting nozzle is maintained at a constant level by actuating the driving compensator in response to the completion of washing of the pipetting nozzle with the washing solution.

Dispensing device with syringe driving compensator for flexible tube

In an automatic analyzer, waste of specimens and reagents is prevented by having a function for detecting the remaining quantity of the liquids being used such as a reagent, a diluent liquid and a cleaning liquid. The weight data (m) of the reagent container only, and the gross weight data (M) of the reagent container and the reagent in the container are entered in an operation processor of the automatic analyzer, and the reagent remaining quantity (Q)=M-m in the reagent container is determined, while the required reagent quantity (D) necessary for specimen processing of the set specimens is determined, and by comparing the both (Q and D), it is judged whether or not to process the specimens.

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Kobe, Japan

Masayuki Kobashi