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Paranasal sinuses

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Paranasal sinuses

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Paranasal sinuses

  1. 1. Paranasal sinuses
  2. 2. Introduction • Pneumatic bones • Location • Relation to nasal cavity • Mucosa of sinuses
  3. 3. 4 Function of Paranasal Sinuses • Humidifying and warming inspired air • Regulation of intranasal pressure • Increasing surface area for olfaction • Lightening the skull • Resonance • Absorbing shock • Contribute to facial growth
  4. 4. Paranasal sinuses • 4 in no. • Divisions – anterior & posterior • Anterior- maxillary, frontal & anterior ethmoidal sinuses • Posterior – middle, posterior ethmoidal & sphenoidal sinuses
  5. 5. Frontal sinus • Shape • Location • Size & no
  6. 6. • Relations – anterior , floor , posterior • Communications – to middle meatus directly or frontonasal duct
  7. 7. • Blood supply • Nerve supply • Lymphatic drainage
  8. 8. Ethmoidal sinus • Location • Groups & no. • Relations – roof , lateral wall • Communications
  9. 9. • Blood supply • Lymphatic drainage
  10. 10. Maxillary sinus • Shape • Location • Size & no. • Relations • Communications
  11. 11. 15 Osteomeatal Complex Middle meatus Maxillary Sinus Ostium Anterior Ethmoid Drainage
  12. 12. • Blood supply • Nerve supply • Lymphatic drainage
  13. 13. Sphenoidal sinus • Location • Size & no. • Relations • Communications
  14. 14. • Blood supply • Nerve supply • Lymphatic drainage
  15. 15. Applied anatomy • Sinusitis – acute & chronic • Neoplasms
  16. 16. Sinusitis • Causes • Clinical features • Diagnosis • Treatment – medical & surgical • Complications
  17. 17. causes • Obstruction to sinus ventilation & drainage • Nasal infection • Swimming & diving • Trauma • Dental infection
  18. 18. Maxillary sinusitis- Water’s ie
  19. 19. Clinical features • Constitutional symptoms • Headache • Tenderness • Oedema of eyelid • Nasal discharge • Postnasal discharge
  20. 20. Investigations • X-ray – lateral & ater’s ie • CT scan • MRI
  21. 21. Water’s ie
  22. 22. Caldwell view
  23. 23. Lateral view
  24. 24. CT picture of sphenoidal sinus
  25. 25. Surgical Treatment • Frontal sinusitis – Trephination of frontal sinus - intranasal drainage operations - external frontoethmoidectomy ( Ho arth’s or Lynch operation) - osteoplastic flap operation
  26. 26. • Maxillary sinusitis – antral puncture & irrigation - intranasal antrostomy - caldwell- luc operation
  27. 27. • Ethmoid sinusitis – external ethmoidectomy - intranasal ethmoidectomy • Sphenoidal sinusitis – sphenoidotomy
  28. 28. Sphenoidotomy Intranasal ethmoidectomy
  29. 29. Complications 1. Orbital complications 2. Osteomyelitis 3. Intracranial 4. Descending infections 5. Focal infections
  30. 30. THANK YOU…

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