Systems and methods for cryopreservation of cells
An auto-nucleating device includes a tube containing a crystalline cholesterol matrix. The ends of the tube are closed by a membrane that is impermeable to the cholesterol but permeable to liquids contained in a cryopreservation vessel. The auto-nucleating device provides a site for ice nucleation during freezing of the liquid within the vessel. One such cryopreservation vessel is a flexible vial having a closed port at one adapted to be pierced by a needle to withdraw the liquid within, and an opposite end that is initially open to receive the liquid. Another vessel includes an adaptor mounted to liquid container with a tubular branch closed by a needle septum and another tubular branch provided with a barbed fitting for engaging a flexible tube that terminates in a needle septum. In another embodiment, the vessel includes an inlet and vent branch at the top of the container and an outlet septum at a bottom opening.
1. A cryopreservation device comprising:
a container for receiving and storing a liquid sample, said container configured to maintain the liquid sample in a sealed condition under cryopreservation conditions, wherein said container comprises a storage tube defining a hollow interior, said storage tube having a first end and a second end;
a first tubular fitting at said first end of said storage tube, said first tubular fitting defining a first passageway in communication with said interior of said storage tube;
a second tubular fitting at said first end of said storage tube, said second tubular fitting defining a second passageway in communication with said interior of said storage;
a septum closing said second end of said storage tube, said septum adapted to be pierced by a needle; and
a first flexible branch comprising a length of heat sealable flexible tubing connected to said first tubular fitting, said first flexible branch further defining said first passageway in communication with said interior of said storage tube, and wherein said heat sealable flexible tubing is configured to form a heat seal and maintain the heat seal under cryopreservation conditions.
2. The cryopreservation device of claim 1 , wherein said first flexible branch further comprises a needle septum.
3. The cryopreservation device of claim 1 , further comprising a second flexible branch comprising a second length of heat sealable flexible tubing connected to said second tubular fitting, said second flexible branch further defining said second passageway in communication with said interior of said storage tube.
4. The cryopreservation device of claim 3 , wherein said second passageway includes a gas-permeable sterile micro filter disposed therein.
5. The cryopreservation device of claim 4 , wherein said gas-permeable sterile micro filter is configured to be generally liquid impermeable.
6. The cryopreservation device of claim 3 , further comprising a cell suspension stored within said storage tube, and wherein said first flexible branch and said second tubular branch are sealed.
7. The cryopreservation device of claim 1 , further comprising a cell suspension stored within said storage tube, and wherein said first flexible branch is sealed.
8. The cryopreservation device of claim 1 , further comprising a removable cover operable to protect said needle septum when subjected to cryopreservation conditions.
9. The cryopreservation device of claim 1 , wherein said heat sealable flexible tubing is configured to form a heat seal that withstands temperatures as low as −196° C.
10. The cryopreservation device of claim 1 , wherein said storage tube comprises a cylindrical vial.
11. A cryopreservation device comprising:
a container for receiving and storing a liquid sample, said container configured to maintain the liquid sample in a sealed condition under cryopreservation conditions, said container having an upper opening and a lower opening;
a cap in sealed engagement with said container covering said upper opening, said cap including a first tubular branch and a second tubular branch communicating with said upper opening of said container; and
an outlet septum closing said lower opening of said container, said outlet septum adapted to be pierced by a needle to withdraw the liquid sample from said container.
12. The cryopreservation device of claim 11 , further comprising an inlet septum in said first tubular branch, said inlet septum adapted to be pierced by a needle to inject the liquid sample into said container.
13. The cryopreservation device of claim 11 , further comprising a sterile micro-filter disposed within said second branch, said micro-filter being permeable to gas.
14. The cryopreservation device of claim 13 , wherein said sterile micro-filter is impermeable to the liquid sample being stored in said container.
15. The cryopreservation device of claim 11 , wherein said first and second branch are heat sealable when the liquid sample is disposed within said container.