Abstract: An artificial pancreas includes a blood sugar determination unit for measuring the blood sugar of the living body, an injection unit including a container for a blood sugar control agent and a feed pump for the control agent and adapted to inject the control agent into the living body and an arithmetic control unit for calculating the dose of the control agent and controlling the pump of the injection unit in accordance with the results of the calculation. The pump includes a disc-shaped roller holder which holds a plurality of rollers around its periphery. Each roller includes flanges at opposite ends. An elastic tube extends around the rollers under tension. Magnets are embedded along the periphery of the roller supports and are sensed to determine the amount of pumping which has occurred. Tubular stoppers are provided within stepped grooves in the pump housing to receive the ends of the elastic tubes.

Abstract: An artificial pancreas comprising a blood sugar determination unit for measuring the blood sugar of the living body, an injection unit including a container for a blood sugar control agent and a feed pump for the control agent and adapted to inject the control agent into the living body, and an arithmetic control unit for calculating the dose of the control agent based on the blood sugar measurement and controlling the pump of the injection unit in accordance with the result of calculation. The blood sugar determination unit has an electrode assembly to be inserted into the living body for measuring the blood sugar. The feed pump comprises a plurality of rollers rotatably mounted on a rotatable roller holder along the outer periphery of the holder and an elastic tube having an intermediate portion reeved around some of the rollers under tension.

Abstract: A test system for identifying bacteria comprising a plate accommodating portion for placing therein a transparent culture plate having a plurality of cells, a light source assembly for applying a light to a specimen in each of the cells of the culture plate placed in the accommodating portion, a photoelectric element for converting to an electric signal the light reflected from or passing through the specimen, a rotary member having a plurality of filters for obtaining monochromatic lights of different wavelengths and a filter synchronizing signal generator and disposed between the light source assembly and the specimen, the rotary member being continuously rotatable at a predetermined speed in a predetermined direction to permit the filters to be selected one after another, and an operation control unit for deriving from the photoelectric element electric signals in response to the monochromatic lights passing through a specified number of the filters to determine the color of the specimen based on the signa