A nonradiographic system for assessing pressure for the Codman-Hakim Programmable Valve.

Background: The Codman-Hakim Programmable Valve is widely used in shunting hydrocephalus and other conditions.

Object: To establish an accurate valve verification system for the Codman-Hakim programmable valve that does not require radiographic exposure.

Methods: Prospective clinical trial tested a new valve verification system at 9 research sites.