Optic Nerve Sheath Diameter in Urologic Surgery

Study Overview
=================
Brief Summary
-----------------
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.

Detailed Description
-----------------
The patients will be divided into 2 groups as those who underwent general anesthesia and spinal anesthesia.Both groups at the specified times. (The patient is supine for both groups before the start of the anesthesia procedure.) 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 optic nerve sheath diameter (OSC) values and lung assessment (LUS), cerebral cerebral palsy with Near-infrared spectroscopy (NIRS) oxygenation, mean arterial pressure, peripheral oxygen saturation, serum sodium, arterial carbon dioxide values and heart rate values will be recorded and significant statistical differences will be evaluated.

Official Title
-----------------
Comparison of Optic Nerve Sheath Diameter and Cerebral Regional Oxygen Saturation in Urological Surgery While Lithotomy Position

Conditions
-----------------
Urological Manifestations, Anesthesia

Intervention / Treatment
-----------------
* Procedure: urologic surgery


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: ASA 1-2-3, patients over 18 years of age who will undergo urological surgery Exclusion Criteria: Existing disease that causes an increase in intracranial pressure Patients with optic nerve pathology, Ophthalmologic diseases

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 90 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| general anesthesia<br>patients observed under general anesthesia | Procedure: urologic surgery<br>* surgery<br>|
| spinal anesthesia<br>patients observed under spinal anesthesia | Procedure: urologic surgery<br>* surgery<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| intracranial pressure changes during Spinal and general anesthesia | optic nerve sheat diameter as a predictor of intracranial pressure | 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 | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
optic nerve sheath diameter, lithotomy position, near infrared spectrometer