Blood collection tube for measuring blood viscosity, blood viscosity measurement device, and sealed pack of blood collection tube for measuring blood viscosity

A blood-viscosity measurement blood collection tube, comprising:

• a bottomed tube provided with an opening at one end in a length direction and a bottom at the other end in the length direction;
• and
• a sealing plug,
• wherein the sealing plug is provided with a sealing part capable of being fitted in the opening of the bottomed tube in a hermetically sealed state, a cap part, and a thin connecting part connecting the cap part and the sealing part,
• wherein the sealing part is provided with a vertically penetrated insertion hole,
• wherein the sealing part of the sealing plug is fitted in the opening of the bottomed tube, and an inner space of the bottomed tube is in a negative pressure state, and
• wherein the cap part is configured to be removed from the sealing plug by breaking the connecting part with an external force applied to the cap part, and the insertion hole is exposed at an upper surface of the sealing part when the cap part is removed.