Patent ID: 11883570
Assignee: TERUMO KABUSHIKI KAISHA
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 19:
20. A method of using a blood transfusion kit, through which blood flows using a tube structure and administers blood to a blood transfusion target, the blood transfusion kit including:
a first blood bag for containing blood from a donor, the first blood bag including a first port and a second port;
a filter that removes leukocytes in blood from the first blood bag;
a blood transfusion unit configured to transfuse blood from which the leukocytes have been removed by the filter to the blood transfusion target;
a first channel connecting the first blood bag and the filter;
a second channel connecting the filter and the blood transfusion unit;
a bypass channel connected between a first branch point of the first channel and a second branch point of the second channel and that enables blood in the first blood bag to bypass the filter;
a blood collection tube connected between a third branch point and the first port of the first blood bag;
a second blood bag that stores blood from the donor;
a blood collection needle for insertion into the donor;
a first tube that connects the third branch point and the second blood bag; and
a second tube that connects the third branch point and the blood collection needle, the method comprising:
operating a pump to pump blood into the second blood bag through the second tube, the third branch point, and the first tube until a predetermined amount of blood is stored in the second blood bag;
clamping the first tube when the predetermined amount of blood stored in the second blood bag is reached;
operating, while the first tube is clamped, the pump to pump blood into the first blood bag through the first port; and
selectively switching between a first state in which blood is administered through the filter by opening the first channel and closing the bypass channel, and a second state in which blood is administered without passing through the filter by opening the bypass channel and closing the first channel downstream from the first branch point, when using the blood transfusion kit.