Pediatric emergency medicine trisk 4648 4648
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FIGURE 135.3 Diagram of typical ventriculoperitoneal shunt.
CSF shunt systems contain a one-way valve to prevent backflow of CSF into
the ventricles. These valves are designed to operate at high, medium, or low
pressure. Externally programmable valves, which can vary the opening pressure
setting, are also available. An antisiphon device may be inserted into the distal
portion of the system to prevent overdrainage of CSF and concomitant lowpressure complications.
Clinical Findings/Management
Mechanical Malfunction
Malfunction of a CSF shunt can be caused by the obstruction of the catheter
lumen or disconnection of the various components. The proximal catheter lumen
