Centrifuge container and methods of use
View Patent ↗A flexible, disposable centrifuge bag for receiving and holding a fluid sample, comprising one or more tubes and upper and lower flexible sheets having doughnut shaped configurations. The upper and lower sheets are superimposed and completely sealed together at their outer perimeters to define an outer perimeter of the centrifuge bag. The inner perimeter of the bag defines a central core. The tubes are sandwiched between the upper and lower sheets and extend from the central core of the centrifuge bag. The upper and lower sheets are sealed together at their inner perimeters such that the tubes are sealed between said upper and lower sheets at the inner perimeter. The bag may be used to harvest platelet rich plasma from whole blood in either a batch method or while simultaneously infusing additional aliquots of whole blood into the bag during centrifugation.
1. A centrifuge container comprising:
a rigid, annular body having an axial core that is closed at its top end and opened at its bottom end;
a collection chamber within said body having an inner perimeter and an outer perimeter and configured to receive and hold a fluid medium to be centrifuged;
an inlet channel extending radially from the axial core to the outer perimeter of the collection chamber and having a distal end fluidly connected to the collection chamber at a first distance away from the axial core;
an outlet channel extending radially from the axial core and fluidly connected to the collection chamber at a second distance away from the axial core, wherein the second distance is less than the first distance;
a multiple lumen tubing having an inlet lumen and an outlet lumen, wherein the multiple lumen tubing is fluidly connected to the inlet channel and an outlet channel.
2. The container according to claim 1 , wherein the collection chamber having a first section and a second section and a central section, wherein the central section is configured to be disposed between the first outer area section and the second section.
3. The container according to claim 2 , wherein said first and second sections are configured to be larger than said central section.
4. The container according to claim 3 , wherein the collection chamber is configured to have an off-centered shape and a height of the first section of the collection chamber is configured to be approximately equal to a height of the second section of the collection chamber, wherein the height of the central section is less than the height of the first section and the height second section; and
wherein a width of the the first section is configured to be less than a width of the second section.
5. The container according to claim 1 , wherein the inlet lumen is configured to be in fluid communication with a proximate end of the inlet channel and the outlet lumen is configured to be in fluid communication with a proximate end of the outlet channel.
6. The container according to claim 5 , wherein the inlet lumen is fluidly connected to a source of fluid medium and the outlet lumen is configured to withdraw a desired fraction of the fluid medium from the interior collection chamber.
7. The container according to claim 6 , wherein the container is coupled to a centrifuge having a rotor.
8. The container according to claim 7 , wherein the fluid medium is whole blood.
9. The container according to claim 8 , wherein the collection chamber is configured to receive the whole blood via the inlet channel;
and the desired fraction is configured to be withdrawn from the collection chamber via the outlet channel.
10. The container according to claim 9 , wherein the whole blood is anticoagulated.
11. The container according to claim 10 , wherein the desired fraction is selected from a group consisting of platelets, platelet rich plasma, platelet poor plasma, white blood cells and red blood cells.
12. The container according to claim 1 , wherein the outlet lumen is configured to be connected to a means for withdrawing a desired fraction of the fluid medium from the collection chamber.
13. The container according to claim 1 , further comprising a plurality of inlet channels and a plurality of outlet channels.
14. The container according to claim 13 , wherein fluid medium is configured to be continuously supplied to the collection chamber through at least one of the plurality of inlet channels during centrifugation of the container.
15. The container according to claim 14 , wherein desired fractions of the fluid medium are configured to be continuously withdrawn via at least one of the plurality of outlet channels during centrifugation of the container.
16. The container according to claim 1 , wherein the container is manufactured from a transparent material.
17. A method of separating components contained in a fluid and harvesting a predetermined component, said method comprising the steps of:
a) providing a centrifuge container having
rigid, annular body having an axial core that is closed at its top end and opened at its bottom end;
a collection chamber within said body having an inner perimeter and an outer perimeter and configured to receive and hold a fluid medium to be centrifuged;
an inlet channel extending radially from the axial core to the outer perimeter of the collection chamber and having a distal end fluidly connected to the coilection chamber at a first distance away from the axial core;
an outlet channel extending radially from the axial core and fluidly connected to the collection chamber at a second distance away from the axial core, wherein the second distance is less than the first distance;
a multiple lumen tubing having an inlet lumen and an outlet lumen, wherein the multiple lumen tubing is fluidly connected to the inlet #amen-channel and an outlet channel;
b) rotating the centrifuge container;
c) providing the fluid to the rotating centrifuge container via the inlet channel, whereby the components of the fluid separate radially into two or more fractions based on their densities; and
d) removing a fraction containing the predetermined component from the centrifuge container via the outlet channel.
18. The method according to claim 17 , wherein the multiple lumen tubing is prevented from completely rotating about its axis during rotation of the centrifuge container.
19. The method according to claim 17 , wherein the fluid is whole blood.
20. The method according to claim 19 , wherein the whole blood is anticoagulated.
21. The method according to claim 17 , wherein the predetermined component is selected from the group consisting of platelets, platelet rich plasma, platelet poor plasma, white blood cells and red blood cells.
22. The method according to claim 17 , wherein step (c) further comprises
continuously supplying fluid medium to the collection chamber via the inlet channel.
23. The method according to claim 17 , wherein step (d) further comprises
terminating removal of the fraction when a desired amount of the fraction is collected.