The watershed program offers technical assistance to watershed groups, municipalities, and individual citizens. A watershed is a geographic area of land across which water, and the sediments and dissolved materials it contains, flow on their way to a single common outlet -- a stream, lake or river.
A lumbar peritoneal (LP) shunt is a technique of cerebrospinal fluid (CSF) diversion from the lumbar thecal sac to the peritoneal cavity.
Types of CSF Shunt Valves. There are two types of CSF shunt valves: fixed and adjustable. Fixed shunt valves allow CSF fluid to drain when CSF pressure exceeds a certain âfixedâ threshold. Adjustable shunt valves allow for changes to the amount of fluid that flows through the valve.