An Update on Programmable CSF Shunt Valves: Identification, MR Imaging Safety and Potential Pitfalls

Programmable shunt valves are commonly used devices for the treatment of hydrocephalus. Unlike fixed shunt valves, programmable devices allow the operator to alter the amount of CSF drainage without the need for shunt revision or valve replacement. With their increased use, many different programmable shunt valves have been developed by various manufacturers; each programmable shunt valve has a distinct radiographic appearance and CSF drainage setting. Because of potential interactions with MR imaging scanners, which can alter programmable shunt valve function, understanding and accurately reporting these devices is essential.

Learning Objectives: Identify commonly used programmable shunt valves and understand their CSF drainage settings to enable the detection of device alterations after MR imaging scanning.