Systems, methods and compositions for optimizing tissue and cell enriched grafts
View Patent ↗Disclosed herein are methods and systems for the concentration of cells from a cell suspension into unprocessed tissue, such as adipose tissue. Also disclosed herein are systems for optimizing hydration of tissue and cell enriched grafts.
1. An adipose tissue processing device, comprising: a flexible, collapsible bag comprising a first outer shell and a second outer shell that are joined to form a bag, wherein the bag comprises:
a first port in communication with a first subsystem, which receives adipose tissue and, which is defined by a first outer shell of the bag and a filter disposed within the bag, wherein the filter comprises a plurality of pores that pass liquids, tumescent fluids, red blood cells, and wash solutions and retain mature adipocytes, regenerative cells, stem cells, progenitor cells and connective tissue; and
a second port in communication with a second subsystem, which is defined by the filter and the second outer shell of the bag,
wherein the second subsystem further comprises a separator that creates a space between the filter and the second outer shell of the bag,
wherein said separator comprises a separation screen or mesh that comprises pores that are larger than the pores in the filter,
wherein the first subsystem and second subsystem are configured to store tissue or cell samples within the bag as the flexible, collapsible bag expands, wherein the pore size of said filter is between about 30 μm and about 200 μm, and
wherein the separator comprises pores that comprise a pore size that is between about 300 and 2000 μm.
2. The adipose tissue processing device of claim 1 , wherein the separator has a degree of freedom.
3. The adipose tissue processing device of claim 1 , wherein the separator is free floating within said second subsystem.
4. The adipose tissue processing device of claim 1 , wherein the separator comprises on or more ribs.
5. The adipose tissue processing device of claim 1 , wherein the separator comprises on or more struts.
6. The adipose tissue processing device of claim 1 , wherein the first outer shell and the second outer shell are joined by a double heat seal.
7. The adipose tissue processing device of claim 6 , wherein the filter is joined to the first outer shell and the second outer shell by a double heat seal.
8. The adipose tissue processing device of claim 1 , wherein said separator comprises a mesh.
9. The adipose tissue processing device of claim 1 , wherein said separator comprises a screen.
10. The adipose tissue processing device of claim 1 , wherein said first port is configured to releasably connect with an adapter, said adapter being configured to releasably connect with a syringe barrel.
11. The adipose tissue processing device of claim 10 , wherein the first port is configured to allow material to enter into the first port, but not to exit from the first port.
12. The adipose tissue processing device of claim 11 , wherein said first port comprises a deformable plastic valve.
13. The adipose tissue processing device of claim 10 , wherein the syringe barrel is a 60 mL catheter syringe barrel.
14. The adipose tissue processing device of claim 1 , wherein the first port is configured to be attached to a cannula, while maintaining a sterile fluid/tissue pathway.
15. The adipose tissue processing device of claim 1 , further comprising a third port in communication with the first subsystem, which exists between the first outer shell of the bag and the filter disposed within the bag.
16. The adipose tissue processing device of claim 15 , wherein said third port is connected to a Y connector.
17. A method of making an adipose tissue graft, comprising:
(a) obtaining a first portion of unprocessed adipose tissue;
(b) introducing said first portion of unprocessed adipose tissue into the first subsystem of a first device of claim 1 ,
(c) rinsing the first portion of unprocessed adipose tissue by adding a physiologic wash solution to the first subsystem; and
(d) removing fluid from the second subsystem of the first device, wherein the fluid is selected from the group consisting of water, physiologic wash solution, blood and free lipid, or any combination thereof, thereby dehydrating the adipose tissue.
18. The method of claim 17 , wherein the physiologic wash solution is selected from the group consisting of Lactated Ringer's solution, Hartmann's Solution, and saline.
19. The method of claim 17 , wherein said dehydrated adipose tissue has a liquid content that is less than about ½, ⅓, or ¼ times that of said first portion of unprocessed adipose tissue prior to the introducing step.
20. The method of claim 17 , wherein said dehydrated adipose tissue has a liquid content that is less than about ⅓ that of said first portion of unprocessed adipose tissue prior to the introducing step.