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  • Title: A flow-regulating device to control differential pressure in CSF shunt systems. Technical note.
    Author: Yamada H.
    Journal: J Neurosurg; 1982 Oct; 57(4):570-3. PubMed ID: 7108610.
    Abstract:
    A method of regulating flow rate through cerebrospinal fluid (CSF) shunts with the addition of a flow-regulating device (FRD) is reported. The FRD consists of a small-caliber (0.4 mm) Teflon tube placed in the usual connector. This device has the advantage of converting the original shunt valves to valves for higher-resistance flow without replacing the entire distal catheter. An experimental study revealed that this device reduced the CSF flow rate in the shunt by approximately 30%. The author has found it reliable in 32 patients, without causing CSF obstruction. The device is easily installed and removed.
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