Hitachi, Ltd.

Hitachi-high-technologies Corporation

Hitachi-science Systems, Ltd.

Hitachi Instruments Engineering Co., Ltd.

Mitsuo Hattori

Tomonori Mimura

Takeshi Sato

Ryohei Yabe

Yasuhisa Shibata

Yasuaki Kojima

Kazumitsu Kawase

Takahiro Kikuchi

Emi Murakami

Hiroko Fujita

Masami Hayashi

A period required for a time-consuming cross-contamination test is cut down or omitted, and a burden imposed on the customer by the costs of samples, reagents, etc. used in the test are reduced. A data failure caused by cross-contamination can be efficiently prevented. A maintenance service office establishes a connection via a communication line between a computer installed in the maintenance service office for maintenance of automatic analyzers and a customer's automatic analyzer or a personal computer placed in a customer's facility. The maintenance service office receives information regarding cross-contamination from reagent manufacturers and other customers (such as clinical examination rooms or centers) and validates it. The validated information is transmitted from the maintenance service office to the customer's automatic analyzer or personal computer via the communication line.

Cross-contamination prevention system and automatic analyzer which equip for it

A body fluid sample and a reagent are reacted in a reaction container, and after measuring the reaction solution the reaction solution is discharged from the reaction container. The vacant reaction container is washed by charging a detergent solution containing plural kinds of surface active agents through a nozzle of a washing mechanism. The detergent solution is a mixed solution containing polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene glycol ether, N-acyl amino acid salt and polyacrylic salt. By the washing method in accordance with the present invention, it is possible to eliminate bad effects due to incomplete washing of reaction containers in an apparatus for automatically successively analyzing biological samples.

Method of washing container used for reaction of body liquid sample and

Dyeing agents which are excellent in visual recognition of discernible or tangible components in a sample cause no coagulation of proteins, sugars or glycoproteins dissolved in the sample. An apparatus for image analysis of flow type stain particles uses the dyeing agents, and particles of discernible components suspended in a flowing sample can be detected so that images of the particles can be efficiently photographed and the discernible components can thus be analyzed by image processing of the thus-obtained image.

Dyeing agent having at least two dyes for staining a biological sample

Growing community of inventors

Hitachinaka, Japan

Mitsuo Hattori