Changes of Optic Nerve Sheath Diameter Between Obese and Non-obese Patients Undergoing Laparoscopic Gynecological Surgery

Study Overview
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Brief Summary
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This study aims to compare the change of optic nerve sheath diameter in obese and non-obese patients undergoing laparoscopic gynecological surgery in a steep Trendelenburg position.

Official Title
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Optic Nerve Sheath Diameter Between Obese and Non-obese Patients Undergoing Laparoscopic Gynecological Surgery

Conditions
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Optic Nerve Sheath Diameter

Intervention / Treatment
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* Other: Ultrasound assessment of optic nerve sheath diameter


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients undergoing laparoscopic gynecological surgery Exclusion Criteria: Ophthalmic diseases Previous history of ophthalmic surgery. Neurological disorders History of head surgery.

Ages Eligible for Study
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Minimum Age: 20 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Obese group<br>body mass index≥ 30 kg/m2 | Other: Ultrasound assessment of optic nerve sheath diameter<br>* Using ultrasonography, optic nerve sheath diameter is measured during perioperative period.<br>|
| Active Comparator: Non-obese group<br>BMI < 30 kg/m2 | Other: Ultrasound assessment of optic nerve sheath diameter<br>* Using ultrasonography, optic nerve sheath diameter is measured during perioperative period.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Optic nerve sheath diameter | Using ultrasonography, optic nerve sheath diameter is measured. | 30 minutes after pneuroperitoneum in the Trendelenburg position | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Optic nerve sheath diameter | Using ultrasonography, optic nerve sheath diameter is measured. | 15 minutes after pneuroperitoneum in the Trendelenburg position | 
| Optic nerve sheath diameter | Using ultrasonography, optic nerve sheath diameter is measured. | 60 minutes after pneuroperitoneum in the Trendelenburg position | 
| Optic nerve sheath diameter | Using ultrasonography, optic nerve sheath diameter is measured. | 10 minutes after release of pneumoperitoneum and return to the supine position | 
| Optic nerve sheath diameter | Using ultrasonography, optic nerve sheath diameter is measured. | At 1 hour after completion of surgery | 
| Optic nerve sheath diameter | Using ultrasonography, optic nerve sheath diameter is measured. | At 24 hours after completion of surgery | 
| Nausea and vomiting | The presence and severity of nausea and vomiting is evaluated. | At 24 hours after completion of surgery | 
| Headache | The presence and severity of headache is evaluated. | At 24 hours after completion of surgery |