A Multislice Computed Tomographic Study of the Sphenoid Sinus

Study Overview
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Brief Summary
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•Sphenoid sinus is located in the body of sphenoid bone, closed with a thin plate of bone tissue that separates it from the surrounding important structures .Detailed, meticulous preoperative radiological study of sphenoid sinus is the key to successful and safe functional endoscopic sinus surgery and transsphenoidal surgery. The purpose of the study is to delineate the sphenoid sinus radiologically using the multislice computed tomography and to decrease morbidity and mortality during skull base surgeries as the sphenoid sinus is one of the most variable of all sinuses and its relation to vital vascular and nervous elements make its approach a challenge for endoscopic surgeons

Detailed Description
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Sphenoid sinus is located in the body of sphenoid bone, closed with a thin plate of bone tissue that separates it from the surrounding important structures such as the optic nerve, optic chiasm, cavernous sinus, pituitary gland, and internal carotid artery. Detailed, meticulous preoperative radiological study of sphenoid sinus variations as in Onodi cells (Sphenoethmoidal air cell) is an anatomical variant of the paranasal sinuses, important due to its close proximity to the optic nerve and internal carotid artery. , Pnumatization pattern as the extent of pneumatization is highly variable and potentially jeopardizing to surrounding vital structures , Septation pattern , Intercarotid distance (in millimeters), Bony covering of carotid artery, Bony covering of optic nerve.is the key to successful and safe functional endoscopic sinus surgery and transsphenoidal surgery. The purpose of the study is to delineate the sphenoid sinus radiologically using the multislice computed tomography and to decrease morbidity and mortality during skull base surgeries as the sphenoid sinus is one of the most variable of all sinuses and its relation to vital vascular and nervous elements make its approach a challenge for endoscopic surgeons

Official Title
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A Multislice Computed Tomographic Study of the Sphenoid Sinus

Conditions
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Nasal Disorder

Intervention / Treatment
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* Device: multislice computed tomography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients with free sphenoid sinus Exclusion Criteria: pathology in the sphenoid sinus refusal of patients for inclusion in the study
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Nasal disorders<br>patients with nasal disorders with free sphenoid sinus | Device: multislice computed tomography<br>* radiological diagnosis of the status and variations in the sphenoid sinus<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The rate of anatomical variations of the sphenoid sinus |  | 30 minutes |