The Usage of Telemetric Prechamber Sensor Reservoir in Management of Normal Pressure Hydrocephalus. Comparisson of Benefit for Patients with Implanted Telemetric Prechamber Sensor Reservoir.

Standardized lumbar puncture in L3/4 or L4/5 in diagnosis of hydrocephalus and 10-meter-walking test prior and 4 hours after lumbar puncture. Mini-mental state examination is done.

External lumbar drainage placement for assessing responsivity of external derivation of cerebrospinal fluid. It is test of responsivity to ventriculo-peritoneal shunt placement

Surgical procedure based on implantation a thin catheter into brain lateral ventricle (placed through a burrhole from Kocher point) and connection to prechamber and valve (placed behind the ear under skin) and similar thin catheter pushed under skin of neck, chest and abdomen (where put intraperitoneally). Telemetric prechamber placement according the randomization (www.randomization.com) and the envelope method of choosing of patients.

Patients after VP shunt placement are assesed in gait, general condition and mini-mental state examination score 3 month after surgery. Brain CT control.

Patients after VP shunt placement are assesed in gait, general condition and mini-mental state examination score 6 month after surgery. Brain CT control.

Patients after VP shunt placement are assesed in gait, general condition and mini-mental state examination score 9 months after surgery. Brain CT control.

Patients after VP shunt placement are assesed in gait, general condition and mini-mental state examination score a month after surgery. Brain CT control, 10-meter-walking test, MMSE, self-assessment.

Non-invasive reading of telemetric prechamber made during each follow-up control.

Changing of valve setting according patient's actual condition. Decission based on clinical state, radiological finding on CT and values readed from telemetric prechamber. Timing - each follow-up control.