CHECK VALVE FOR DRAINAGE OF FLUID INTO THE VASCULAR SYSTEM OR INTO A BODY CAVITY FOR THE TREATMENT OF HYDROCEPHALUS INTERNUS AND EXTERNUS

摘要

The check valve for drainage of fluid into the vascular system or into a body cavity for the treatment of hydrocephalus internus and externus is fabricated of synthetic material and has a body with screw thread on each side. On the proximal side of the valve is screwed a connector, which has a cone and a cylindrical part to receive a proximal catheter, in addition to a screw thread for the fixing of a screw cap. On the connector is a shoulder serving as a stop for the screw cap and preventing shearing of the proximal catheter. The connector has a longitudinal bore which drains the fluid into the catheter, the bore widens to a cone and this cone is obturated by a piston, which possesses four longitudinal slots. A spring lays in the bore and can be adjusted by a regulating screw for the purpose of pressure calibration of the fluid.