Polaris® Adjustable Pressure Valve - Valve, hydrocephalic

Intended purpose

The Polaris® adjustable pressure valve is intended to shunt the Cerebrospinal Fluid (CSF) from the ventricular system or subarachnoid spaces to the peritoneal cavity (VPS) or the right atrium of the heart where it will be reabsorbed in the blood flow.

Functional description

The valve allows drainage of CSF in a given direction. The valve contains a ball-in-cone mechanism which determines the operating pressure of the valve. This is based on the pressure variation exerted on a ruby ball at different points on its curvature. The spring is attached to a rotor which is able to rotate inside the valve body on its central axis. The operating pressure is determined by the angular position of its rotor. The resistance of the valve can be adjusted without re-operating.