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ORIGINAL ARTICLE
Year : 2020  |  Volume : 69  |  Issue : 3  |  Page : 133-136

Morphometry of sphenoid air sinus and its ostium for surgical relevance: A cadaveric study


Department of Anatomy, Vinayaka Mission's Kirupananda Variyar Medical College and Hospital, Vinayaka Mission's Research Foundation (Deemed to be University), Salem, Tamil Nadu, India

Correspondence Address:
Dr. B Senthil Kumar
Department of Anatomy, Vinayaka Mission's Kirupananda Variyar Medical College and Hospital, Vinayaka Mission's Research Foundation (Deemed to be University), Salem - 636 308, Tamil Nadu
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/JASI.JASI_110_19

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Introduction: The sphenoid air sinuses and their ostia are highly variable structures. The ostia are located on either side of the midline. The exact location of the sphenoid ostium is very much essential in endoscopic sinus surgeries as well as for the transsphenoidal hypophyseal approach. The present study was done to determine the anatomical location of the sphenoid sinus ostium in relation to the surrounding landmarks. It is a descriptive study. Material and Methods: The study was carried out in the Department of Anatomy, VMKV Medical College and Hospital, Salem, on forty sagittal head and neck sections of adult formalin-fixed cadavers. The length and width of the sinus were measured. The shape and type of the sphenoid sinus ostia were also noted. The distance of the sinus ostium from various landmarks was measured using Vernier calipers. The morphometric parameters were compared by Student's t-test on both sides. Results: Most of the specimens showed sellar variety than presellar variety on both right and left sides. The shape of the sphenoid sinus ostia was predominantly round shape, followed by oval and slit shape. The length and width of the sinus on the right side were less when compared to the left side. The distance between the sphenoidal ostia and several landmarks showed no significant difference except the distance from ostium to superior concha. Discussion and Conclusion: During the endoscopic approach of the sphenoid sinus ostium, it is not always easy to locate the ostium. The present morphometric study will serve as a guideline for the endoscopic surgical approach of the sphenoid sinus ostium using the various anatomical landmarks.


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