Method for controlling a blood component separation device including temporarily storing a component in a container
The object of the invention is to provide a blood separation device that can reduce the total time for drawing blood to obtain high-concentration platelet liquid, thereby reducing the binding time of the blood donor. The device includes a temporary storage bag (Y 2 ) (also serves as a buffy coat bag) which is a whole blood bag for storing whole blood drawn from a blood donor. The controlling unit of the device controls the device to draw whole blood from the blood donor in parallel with at least either a circulation flow step or an acceleration step, thereby storing the drawn whole blood in the temporary storage bag (Y 2 ).
1. A method of controlling a blood component separation device comprising:
a centrifugal separator for separating a predetermined blood component from blood; and
a container for containing the predetermined blood component that is centrifugally separated, wherein the method comprises:
(a) a centrifugal separation step of introducing whole blood drawn from a blood donor into the centrifugal separator with a first blood pump to separate the whole blood into a plurality of blood components,
(b) a circulation flow step of introducing a predetermined first blood component, among centrifugally separated blood components, into a first container together with whole blood, and
(c) a circulation/acceleration step of stopping supply of whole blood to the centrifugal separator after separating a predetermined amount of the first blood component in the circulation flow step, introducing only the first blood component stored in the first container to the centrifugal separator with a second blood pump to circulate the first blood component for a predetermined period of time, and increasing a circulation speed in the centrifugal separator to separate and collect a second blood component,
wherein whole blood drawn from the blood donor is temporarily stored in a temporary storage container during at least a period of time in the circulation/acceleration step, and
a first tube coupled to the temporary storage container is further coupled to an outlet port of the centrifugal separator and a second tube also coupled to the temporary storage container is further coupled between the first container and the second blood pump.
2. The method according to claim 1 , wherein the second tube is branched such that a first branch tube is coupled between the first container and the second blood pump and a second branch tube is coupled to an outlet port of the first blood pump,
an open/close valve is provided on each of two branch tubes branched from the second tube,
an open/close valve is provided to an outlet port of the second blood pump, and
an open/close valve is provided to an outlet port of the first container.
3. The method according to claim 2 , wherein the blood component separation device is configured to perform
(d) a blood returning step, which is performed after collecting a predetermined amount of the second blood component in the circulation/acceleration step, of returning to the blood donor a blood component that is not collected, and
whole blood stored in the temporary storage container is introduced, in the centrifugal separation step in a following cycle, into the centrifugal separator together with whole blood drawn in the following cycle, the steps (a) to (d) constituting one cycle.
4. The method according to claim 3 , wherein,
the circulation/acceleration step includes:
a first collecting step of transferring a portion of the second blood component with low-concentration to the temporary storage container; and
a second collecting step of collecting a portion of the second blood component with high-concentration, and
the second blood component with low-concentration transferred to the temporary storage container and whole blood collected in the temporary storage container in a following cycle are introduced into the centrifugal separator together with whole blood drawn in the following cycle.
5. The method according to claim 2 , wherein, the circulation/acceleration step includes:
a first collecting step of transferring a portion of the second blood component with low-concentration to the temporary storage container; and
a second collecting step of collecting a portion of the second blood component with high-concentration, and
the second blood component with low-concentration transferred to the temporary storage container and whole blood collected in the temporary storage container in a following cycle are introduced into the centrifugal separator together with whole blood drawn in the following cycle.
6. The method according to claim 1 , wherein the blood component separation device is configured to perform
(d) a blood returning step, which is performed after collecting a predetermined amount of the second blood component in the circulation/acceleration step, of returning to the blood donor a blood component that is not collected, and
whole blood stored in the temporary storage container is introduced, in the centrifugal separation step in a following cycle, into the centrifugal separator together with whole blood drawn in the following cycle, the steps (a) to (d) constituting one cycle.
7. The method according to claim 6 , wherein, the circulation/acceleration step includes:
a first collecting step of transferring a portion of the second blood component with low-concentration to the temporary storage container; and
a second collecting step of collecting a portion of the second blood component with high-concentration, and
the second blood component with low-concentration transferred to the temporary storage container and whole blood collected in the temporary storage container in a following cycle are introduced into the centrifugal separator together with whole blood drawn in the following cycle.
8. The method according to claim 1 , wherein the second blood pump introduces, in the centrifugal separation step in a following cycle, at least either whole blood or a low-concentration second blood component stored in the temporary storage container in a previous cycle into the centrifugal separator.
9. The method according to claim 8 , wherein the second tube is branched such that a first branch tube is coupled between the first container and the second blood pump and a second branch tube is coupled to an outlet port of the first blood pump,
an open/close valve is provided on each of two branched tubes branched from the second tube,
an open/close valve is provided to an outlet port of the second blood pump, and
an open/close valve is provided to an outlet port of the first container.
10. The method according to claim 9 , wherein the blood component separation device is configured to perform
(d) a blood returning step, which is performed after collecting a predetermined amount of the second blood component in the circulation/acceleration step, of returning to the blood donor a blood component that is not collected, and
whole blood stored in the storage container is introduced, in the centrifugal separation step in a following cycle, into the centrifugal separator together with whole blood drawn in the following cycle, the steps (a) to (d) constituting one cycle.
11. The method according to claim 10 , wherein, the circulation/acceleration step includes:
a first collecting step of transferring a portion of the second blood component with low-concentration to the temporary storage container; and
a second collecting step of collecting a portion of the second blood component with high-concentration, and
the second blood component with low-concentration transferred to the temporary storage container and whole blood collected in the temporary storage container in a following cycle are introduced into the centrifugal separator together with whole blood drawn in the following cycle.
12. The method according to claim 9 , wherein, the circulation/acceleration step includes:
a first collecting step of transferring a portion of the second blood component with low-concentration to the temporary storage container; and
a second collecting step of collecting a portion of the second blood component with high-concentration, and
the second blood component with low-concentration transferred to the temporary storage container and whole blood collected in the temporary storage container in a following cycle are introduced into the centrifugal separator together with whole blood drawn in the following cycle.
13. The method according to claim 8 , wherein the blood component separation device is configured to perform
(d) a blood returning step, which is performed after collecting a predetermined amount of the second blood component in the circulation/acceleration step, of returning to the blood donor a blood component that is not collected, and
whole blood stored in the storage container is introduced, in the centrifugal separation step in a following cycle, into the centrifugal separator together with whole blood drawn in the following cycle, the steps (a) to (d) constituting one cycle.
14. The method according to claim 13 , wherein, the circulation/acceleration step includes:
a first collecting step of transferring a portion of the second blood component with low-concentration to the temporary storage container; and
a second collecting step of collecting a portion of the second blood component with high-concentration, and
the second blood component with low-concentration transferred to the temporary storage container and whole blood collected in the temporary storage container in a following cycle are introduced into the centrifugal separator together with whole blood drawn in the following cycle.
15. The method according to claim 8 , wherein, the circulation/acceleration step includes:
a first collecting step of transferring a portion of the second blood component with low-concentration to the temporary storage container; and
a second collecting step of collecting a portion of the second blood component with high-concentration, and
the second blood component with low-concentration transferred to the temporary storage container and whole blood collected in the temporary storage container in a following cycle are introduced into the centrifugal separator together with whole blood drawn in the following cycle.
16. The method according to claim 1 , wherein, the circulation/acceleration step includes:
a first collecting step of transferring a portion of the second blood component with low-concentration to the temporary storage container; and
a second collecting step of collecting a portion of the second blood component with high-concentration, and
the second blood component with low-concentration transferred to the temporary storage container and whole blood collected in the temporary storage container in a following cycle are introduced into the centrifugal separator together with whole blood drawn in the following cycle.