Profile: Vygon Neuro designs, develops and manufactures medical products for patients, doctors & hospitals. Diamond valves and shunt systems are designed to provide one-way flow control for shunting cerebrospinal fluid (CSF) from the ventricles of the brain. The valve assembly is comprised of two silicone elastometer, differential pressure valve mechanisms in series, connected by an elastic tube, with an aperture in the side wall, which acts as a flow regulating mechanism. The valve mechanism is contained within an integral silicone elastomer chamber with an integral suture base. Each differential pressure valve mechanism consists of a silicone elastomer dome with two crossed slits in polysulfone housing. The design of the valve mechanisms prevents retrograde flow to the brain. The valve housings incorporate integral proximal and distal connectors for easy catheter connection. The Anti-Blok ventricular catheter is designed with four axial channels at the tip, each with recessed rectangular molded holes. The channels promote free flow of CSF and discourage occlusion of the holes by debris, tissue, choroid plexus or ventricle walls. Vision catheters are manufactured of clear tubing with an encapsulated barium stripe allowing the physician to check for air bubbles in the system prior to closing. The encapsulated barium does not come into contact with CSF or tissue and therefore is not susceptible to complication associated with barium catheters.