FIELD: medical engineering.;SUBSTANCE: device has gas distribution unit and executive unit connected via high pressure sleeve to power unit having pneumatic cylinder. Gas distribution unit has pneumatic dispenser. The power unit has head and pneumatic cylinder posterior flanges. An additional piston is mounted in the pneumatic cylinder positioned between working piston and posterior flange. Cavity between the pistons is connected to the pneumatic dispenser exit all the time with a canal. Ball lock with pusher is mounted on the posterior flange, the pusher being engageable with the additional piston. Ring-shaped grooves manufactured in conformity with the balls of the ball lock are available on the pusher. The canal is manufactured as spiral-shaped flexible pipe. Reverse valve having body and spring-loaded pusher is mounted in head body. The outlet canal in the device body is conic.;EFFECT: enhanced effectiveness of discrete-mode drug dose control; accelerated preparation to setting injector in operation mode.;3 cl, 3 dwg
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