METHOD AND DEVICE FOR DEFROSTING BLOOD PLASMA Russian patent published in 2006 - IPC A61K35/14 A61M5/44 

FIELD: medicine; medical engineering.

SUBSTANCE: method involves dipping plastic bags containing blood plasma frozen to -25 - -30°C and lower, into bath filled with water to achieve full thaw at water temperature not exceeding 8°C or at 35-37°C washing the bags with turbulent flow. The bags are arranged in chessboard order and defrosting process is carried out as follows. First, the bags containing blood preparations are defrosted to 0-4°C. The temperature being achieved is determined from water level reduction in the bath to a calculated value determined from formula Δh = n(V_fp - V_lp)/S, (1), where Δh is the given value of water level reduction in the bath when thawing the plasma, n is the number of bags containing frozen plasma, placed in the bath at a time, V_fp is the frozen plasma bag volume, V_lp is the liquid plasma bag volume, S is the bath area. Timer is switched on for a calculated time applied to bring the bags containing blood components to 7-8°C. Device has bath filled with distilled water, heating and cooling device temperature sensor and control circuit as well as mixer having electric drive connected to executive circuit of the control circuit and water level sensor connected to control circuit input. The bath has canals for letting water flow from bath end to compartment where the mixer is placed. The mixer is separated from the rest objects in the bath with vertical partition communicating with the bath via connecting hole in the lower part of the compartment. The control circuit comprises the timer.

EFFECT: accelerated defrosting process.

2 cl, 2 dwg, 1 tbl