FIELD: medical engineering.
SUBSTANCE: device has reservoir arranged between injector having at least one injection canal and means for forcing gas outside engageable with gas generator device. The means for forcing gas outside has an end directed towards active agent forming pusher head which cross-section is equal to reservoir cross-section and the opposite end is directed towards gas generator having driven head which cross-section is greater than pusher head cross-section. The pusher head (4,24,34) is manufactured as a whole-piece. Working stroke length of the driven head is less than height of the reservoir containing liquid active substance. Another embodiment differs in that the driven head serves as upper head of upper whole-block piston and the pusher head is lower side of lower whole-block piston. The third embodiment is one-stage piston which upper side is driven head part and the lower side is the pusher head.
EFFECT: simplified design; allowed two levels of injection pressure and speed.
18 cl, 6 dwg
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