Device for automatically and continuously measuring the constituent parts of blood

A device for automatically and continously measuring constituent parts of blood, said constituent parts being continuously drawn from the blood by means of a catheter inserted in a vein, comprising:

• blood drawing means for drawing blood;
• a tube pump coupled to said blood drawing means;
• sample liquid cup means for holding a sample liquid received from said blood drawing means by said tube drawing pump;
• standard liquid cup means for holding a standard liquid;
• base liquid cup for receiving a base liquid;
• sensor means for sensing said constituent part;
• sensor means correction means responsive to said standard liquid and said base liquid for correcting said sensor means;
• sampling means comprising a single sampling nozzle and nozzle tube for withdrawing said sample liquid, standard and base liquid from their respective cups in a predetermined order, said sampling means further comprising means for separating said withdrawn sample, standard and base liquids with air;
• manifold means for receiving said separated standard liquid, base liquid and sample liquid, and for diluting them at an equal rate by the use of a buffer solution, and for interposing a layer of air between said diluted sample, base and standard liquid, and for providing the diluted and separated sample, standard and base liquid as respective measuring liquids;
• and
• operation control means coupled to said sensor means for receiving successive signals, in order therefrom, and for correcting said sensor output signals of said sample liquid according to said standard liquid and said base liquid, and for further displaying the value of said constituent part, and further for controlling the operation of said sampling device.