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DESCRIBE LATERAL WALL OF NOSE: Each nostril cavity has a lateral wall.

                                       Lateral Wall of Nose 

  STRUCTURE:

  1. INFERIOR TURBINATE: Separate bone. Below it inferior meatus- nasolacrimal duct opens, guarded by mucosal valve called Hasner's Valve.
  2. MIDDLE TURBINATE: Part of Ethmoid. Attached to lateral wall by a bony lamellar ‘ground or basal lamella'. Anterior group of paranasal sinuses & posterior groups open into meatus.
  3. MIDDLE MEATUS SHOWS: Uncinate process, hiatus semilunaris, infundibulum, bulla ethmoidalis, aupra bullar or retro bullar recess, atrium of middle meatus, Agger nasi.
  4. SUPERIOR TURBINATE: Part of Ethmoid. Post ethmoid cells open in Superior meatus.
  5. SPHENO ETHMOIDAL RECESS: Above Superior Turbinate. Sphenoid sinus opens into it.
  6. SUPREME TURBINATE: Sometimes present. Narrow meatus beneath it.

NERVE SUPPLY:

  1. Olfactory nerve.
  2. Anterior Ethmoidal nerve.
  3. Infraorbital nerve.
  4. Branches of Sphenopalatine ganglion.

LYMPHATIC DRAINAGE: Directly into upper jugular node or through the retro pharyngeal nodes.

VEINS:

  1. Sphenopalatine & anterior facial.
  2. Ophthalmic vein.
  3. Superior sagital sinus.
  4. Veins or orbital surface of anterior cranial fossa.

                                      Blood supply of Nasal Septum

BLOOD SUPPLY:

  1. Anterior Ethmoidal artery (branch of Ophthalmic artery).
  2. Posterior Ethmoidal artery (branch of Ophthalmic artery).
  3. Branches of Facial Artery.
  4. Branches of Sphenopalatine artery.

SURGICAL IMPORTANCE OF LATERAL WALL OF NOSE:

  1. RETROCOLUMNAR VEIN: Common site of venous bleeding.
  2. WOODRUF'S PLEXUS: Site of posterior epistaxis.
  3. SUPERIOR TURBINATE: Important landmark to identify ostium of Sphenoid Sinus.
  4. SUPERIOR MEATUS: Onodi celll (posterior Ethmoidal cell) is surgically important, as Optic nerve may be related to it.
  5. MIDDLE MEATUS.
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