Rapid resolution of an acute subdural hematoma by increasing the shunt valve
pressure in a 63-year-old man with normal-pressure hydrocephalus with a ventriculoperitoneal shunt: a case report and literature review.
The most recent technology is a shunt valve
that is programmable, thus allowing the pressure to be adjusted.
Carlos and Salomon Hakim introduced their programmable ventricular shunt valve
, formerly referred to as the Codman Medos or Medos Hakim programmable valve (Medos SA, Le Locle, Switzerland) for use in Japan, Europe, and South America.
After CT scans in the RVH's famed neuro-unit, surgeons installed a Shunt valve
to relieve the pressure on the brain and later cut out a small tumour.
Patients who required EVD during the last 2 years of data collection had an inline shunt valve
of slightly higher pressure than their usual requirements placed into the ventricular catheter during routine ventriculostomy.
Falk, "In vitro assessment of back pressure on ventriculoperitoneal shunt valves
. Is laparoscopy safe?," Surgical Endoscopy, vol.
(2) Outcomes may vary with different types of shunt valves
(low to high pressure, programmable) and shunt configurations (ventriculoperitoneal, ventriculatrial, and lumboperitoneal).
Current treatment of normal pressure hydrocephalus: Comparison of flow-regulated and differential-pressure shunt valves
. Neurosurgery, 37(5), 877-884.
Conventional shunt valves
have fixed pressure levels.