Intraocular Pressure Versus Optic Nerve Sheath Diameter

Study Overview
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Brief Summary
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This study involves observing and comparing Intraocular Pressure and Optic Nerve Sheath Diameter in steep trendelenburg position. Both observations will be done in same patient over the surgical duration.

Detailed Description
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Steep trendelenburg position is required for various robotic surgical procedures like hysterectomy, radical prostatectomy etc. Both Intraocular Pressure and Optic Nerve Sheath Diameter are found to get increased while in this position. Intraocular Pressure will be measured by schiotz tonometer over an hourly interval whereas Optic nerve sheath diameter will be measured with use of ultrasound using a probe of 7.5 Mega hertz. Both values will be measured in both the eyes and will be compared statistically to find any correlation which may exist between the two.

Official Title
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Correlation Between Intraocular Pressure and Optic Nerve Sheath Diameter

Conditions
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Intraocular Pressure, Optic Nerve Sheath Diameter

Intervention / Treatment
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* Procedure: Schiotz tonometer for Intraocular Pressure


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: robotic surgeries surgical duration upto 4 hours american society of anaesthesiologists 1 to 3 Exclusion Criteria: any history of opthalmic intervention patient suffering from glaucoma patients taking any diuretics for cardiac problems

Ages Eligible for Study
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Minimum Age: 40 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: changes in eye<br>Changes in both intraocular pressure and optic nerve sheath diameter will be correlated in robotic surgeries to find out any statistical relation existing between two. | Procedure: Schiotz tonometer for Intraocular Pressure<br>* Both Values will be corelated<br>* Other names: Ultrasound for Optic nerve sheath diameter;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| correlation between rise of intraocular pressure and optic nerve sheath diameter | Intraocular pressure will be measured using schiotz tonometer whereas optic nerve sheath diameter will be assessed using ultrasound in same patient at same intervals. This will give us both the values of intraocular pressure and optic nerve sheath diameter at same time which as per previous studies increases and are statistically significant. After compilation of results it will be analyzed that whether both values increases in a correlated manner or not which will give us our results that whether increase of one value can tell the increase of other value. | 9 months |