FIELD: medical engineering. SUBSTANCE: device has body giving passage from the first port to the second one. The valve determines the first liquid volume, when both medical instruments are connected to it, and the second lesser volume, when one of the instruments is disconnected, for creating positive flow from the valve to the second medical instrument when the first instrument is disconnected. EFFECT: excluded fluid stagnation in the vicinity of valve. 53 cl, 52 dwg
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