BLOOD TEST DEVICE

摘要

A blood test device by which the degree of skin elevation at a puncture site for conducting a blood test or collecting the blood can be controlled at a constant level so that a blood component can be accurately measured. Namely, a blood test device comprising: a housing; an inner tube provided in one side of the housing; a reciprocating unit which reciprocates within the inner tube; a blood collection needle connected to the reciprocating unit; a blood sensor facing to the blood collection needle and being located at the tip of the inner tube; a measurement circuit to which a signal is fed from the blood sensor; and a negative pressure unit driven by the measurement circuit; which further has an outer tube that is a tube covering the inner tube, having an opening in the tip side of the inner tube, being capable of relatively moving to the inner tube, and being provided so as to return to a definite relative position. The negative pressure unit as described above can apply a negative pressure to the inside of the outer tube.