| abstract |
A two stage method of thawing cells from a cryopreserved state includes first warming the cells from a cryopreservation temperature to a transition temperature of at least -30°C in a first, slow-warming stage by exposing the cells to an atmosphere having a temperature of less than 30°C, and once the cells have obtained the transition temperature, subsequently further warming the cells from the transition temperature by exposing the cells to a temperature of least 32°C in a second, rapid-warming stage. After the cells obtain the transition temperature in the first stage, the cells may be equilibrated at the transition temperature for a period of time prior to conducting the second stage warming. The method is particularly useful in warming cryopreserved cells attached to a fixed substrate. A thermal conduction device in association with the cryopreserved cells may also be used to further assist in the warming procedure. |