Shunt series
CT scan without contrast
Ventricular tap
MRI, unless patient has programmable shunt (Can be recalibrated by Neurosurgery if needed)
Pumping shunt (institution dependent) - may pull choroid plexus into shunt or cause intraparenchymal bleed
Ventriculoperitoneal shunt obstruction
Ventriculoperitoneal shunt overdrainage
Ventriculoperitoneal shunt overdrainage 
Ventriculoperitoneal shunt infection
Ventriculoperitoneal shunt complications
Ventriculoperitoneal shunt mechanical failure
Elevated intracranial pressure
Sinus barotrauma