FIELD: medical equipment.
SUBSTANCE: invention relates to medical equipment, namely to a device for injecting a liquid drug. The device contains a tank, in which a drug is stored, or the possibility for storing a drug is provided, and a pump containing a pump chamber connected via fluid to the tank by means of a single-way valve passing fluid only in a direction from the tank to the pump chamber, and connected via fluid by means of the valve to an outlet for a drug. The valve contains valve case (1), which has cavity (2) for receiving liquid (20). Valve case (1) has inlet (3) for liquid and outlet (4) for liquid located opposite it, both of which communicate with cavity (2). In cavity (2), there are micro-channels (5) passing in direction (x) of connection between inlet (3) for liquid and outlet (4) for liquid. Micro-channels are formed by a lattice consisting of parallel rod-shaped limiting elements (6) or of parallel lattice layers of parallel rod-shaped limiting elements (6) located with a displacement relatively to each other. Limiting elements (6) pass perpendicular to direction (x) of connection between inlet (3) for liquid and outlet (4) for liquid. The diameter of micro-channels (5) is from 5 to 20 mcm. The ratio of cross-sectional areas between micro-channels (5) and cavity (2) is from 1:50 to 1:100. Cavity (2), inlet (3) for liquid and outlet (4) for liquid have the same cross-sectional area perpendicular to direction (x) of connection.
EFFECT: valve of the type in question and the corresponding device for injecting a liquid drug are proposed, having as small a size as possible.
11 cl, 3 dwg
