Paranasal Sinus Anatomy pot

Paranasal Paranasal Sinus Sinus Anatomy Anatomy Marilene B. Wang, MD, Marilene B. Wang, MD, FACS FACS Professor Professor UCLA Division of Head and Neck UCLA Division of Head and Neck Surgery Surgery Chief of Otolaryngology Chief of Otolaryngology VA Greater Los Angeles Healthcare VA Greater Los Angeles Healthcare System System Paranasal Paranasal Sinus Function Sinus Function   Lining Lining – – pseudostratified pseudostratified ciliated columnar epithelium ciliated columnar epithelium   Mucous and Mucous and serosanguinous serosanguinous glands glands   Parasympathetic and Parasympathetic and sympathetic sympathetic innervation innervation Paranasal Paranasal Sinus Function Sinus Function   Mucous blanket renewed every Mucous blanket renewed every 10 10 - - 15 minutes 15 minutes   Warm and humidify air Warm and humidify air   Secrete Secrete immunoglobulins immunoglobulins , , interferons interferons , inflammatory cells , inflammatory cells Paranasal Paranasal Sinus Function Sinus Function   Cilia beat 10 Cilia beat 10 - - 15 times/second 15 times/second   Cilia function varies with Cilia function varies with environment, allergies, smoking, environment, allergies, smoking, etc. etc.   Mucociliary Mucociliary system system — — cleanse sinus, cleanse sinus, immunoprotective immunoprotective   Move mucous to natural Move mucous to natural ostia ostia of of sinuses sinuses Four Paired Sinuses Four Paired Sinuses   Ethmoid Ethmoid   Maxillary Maxillary   Frontal Frontal   Sphenoid Sphenoid [...]... Sinus Embryology 4 frontal pits—form frontal and ethmoid sinuses 1st pit—Agger Nasi cell 2nd pit—Frontal Sinus 3rd pit—other ethmoid cells 4th pit—other ethmoid cells Schaeffer JP, Amer J Anatomy 1916 Kasper, Archives of Otolaryngol, 1936 Sphenoid Sinus Evagination of sphenoethmoid recess at birth Pneumatization begins age 3 Reaches sella by age 7 Development continues through adulthood Sphenoid Sinus. .. sphenopalatine foramen Maxillary Sinus Present at birth Rapid growth age 0-3, then 7-12 Triangular shape Natural ostium superior medial wall Frontal Sinus Not present at birth Forms by age 12 Anterior and posterior table Nasofrontal duct— misnomer Frontal recess Frontal Recess Connection of the frontal sinus to the anterior ethmoid Term first used by Killian in 1898 Frontal Sinus Van Alyea—performed 247... Sinus 20 mm high, 23 mm deep, 17 mm wide Vessels and nerves on lateral aspect (internal carotid artery, optic nerve, vidian nerve) Sphenoid Sinus Dehiscent or minimal bony covering over vessels and superior wall (dura) Intersinus septum rarely midline Caution—intersinus septum often inserts onto carotid canal . Paranasal Paranasal Sinus Sinus Anatomy Anatomy Marilene B. Wang, MD, Marilene B. Wang, MD, FACS FACS Professor Professor UCLA. Healthcare VA Greater Los Angeles Healthcare System System Paranasal Paranasal Sinus Function Sinus Function   Lining Lining – – pseudostratified pseudostratified ciliated