The investigators aimed to determine intracranial pressure changes during spinal and general anesthesia by using optic nerve sheath diameter and near infrared spectrometer in urologic surgery patients in lithotomy position. Also the investigators plan to evaluate to measure intrathoracic pressure effects to intracranial pressure.
Age range
18 Years – 90 Years
Sex
ALL
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intracranial pressure changes during Spinal and general anesthesia
Timeframe: position T0, for group G, T1G 2 minutes after intubation, T1S 2 minutes after spinal anesthesia for group S, two T2, lithotomy 5 minutes after the lithotomy position for the group lithotomy to T3 30 minutes after the T4, T5 in PACU ) 60 minutes after