Abstract: The disclosure describes a device for filling and evacuating hollow organs in human and animal bodies. The device is provided with a suction valve adapted to be connected to a catheter or probe, the suction valve being connected, by means of hoselines, to a storage tank for flushing liquids and to at least one collector vessel. The suction valve is in the form of a three-way element, one connection thereof being adapted to be connected directly to a catheter or probe, the inlet and outlet hoselines for the flushing liquid, connected to the said three-way valve, being of sufficient length to permit unobstructed actuation of the said catheter or probe, and of the said three-way valve independently of the storage tank and the collector vessel.