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Anu

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Anu

  1. 1. The mastoid bone is a bone located behind the ear (felt as a hard bump behind the ear). Inside it looks like a honeycomb, with the spaces filled with air. These air cells are connected to the middle ear through an air filled cavity called the mastoid antrum. Mastoid process
  2. 2. <ul><li>Mastoidectomy </li></ul><ul><li>A mastoidectomy is a surgical procedure designed to remove infection or growths in the bone behind the ear (mastoid bone). Its purpose is to create a &quot;safe&quot; ear and prevent further damage to the hearing apparatus. </li></ul><ul><li>Indications: </li></ul><ul><li>MASTOIDITIS that does not respond to antibiotics. </li></ul><ul><li>CHOLESTEATOMA. </li></ul><ul><li>Repair an injured FACIAL NERVE. </li></ul>
  3. 3. <ul><li>Simple mastoidectomy </li></ul><ul><li>Radical mastoidectomy </li></ul><ul><li>Modified radical mastoidectomy </li></ul>Types of mastoidectomy
  4. 4. Simple mastoidectomy <ul><li>Indication: </li></ul><ul><li>Mastoiditis </li></ul><ul><li>Acute otitis </li></ul><ul><li>Steps of operation </li></ul><ul><li>Incision </li></ul><ul><li>Exposure of lateral surface of mastoid and MacEwens triangle </li></ul><ul><li>Removal of mastoid processmand exposure of antrum </li></ul><ul><li>Removal of mastoid air cell </li></ul><ul><li>Removal of mastoid tip and finishing the cavity. </li></ul><ul><li>Closure of wound </li></ul>
  5. 5. <ul><li>Post operative care </li></ul><ul><li>Antibiotics </li></ul><ul><li>Drainage </li></ul><ul><li>Complications </li></ul><ul><li>Injury to facial nerve </li></ul><ul><li>Dislocation of incus </li></ul><ul><li>Injury of horzintal semicircular canal </li></ul><ul><li>Post operative wound infection </li></ul>
  6. 6. <ul><li>Indication </li></ul><ul><li>Cholesteatoma </li></ul><ul><li>Removal of glomus tumour </li></ul><ul><li>Carcinoma of middle ear </li></ul>Radical mastoidectomy <ul><li>Steps of operations </li></ul><ul><li>Incision </li></ul><ul><li>Retraction of soft tissue and exposure of mastoid area </li></ul><ul><li>Removal of bone and exposure of attic and antrum. </li></ul><ul><li>Removal of bridge and buttresses </li></ul><ul><li>Lowering the facial ridge </li></ul><ul><li>Removal of remnants from middle ear </li></ul><ul><li>Inspection of cavity and irrigation </li></ul><ul><li>Meatoplasty </li></ul><ul><li>Obliteration of cavity </li></ul><ul><li>Closure of wound </li></ul>
  7. 7. <ul><li>Complication </li></ul><ul><li>Facial paralysis </li></ul><ul><li>Perichondritis of pinna </li></ul><ul><li>Labyrinthitis if stapes get dislocated </li></ul><ul><li>Conductive deafness </li></ul>Post operative care Dressing Antibiotics
  8. 8. <ul><li>Indication </li></ul><ul><li>Cholesteatoma confined to attic and antrum </li></ul><ul><li>Localizes chronic otistis media </li></ul>Modified radical mastodectomy <ul><li>Steps of operation </li></ul><ul><li>Incision </li></ul><ul><li>Retracrtion of soft tissue and exposure of mastoid area </li></ul><ul><li>Removal of cortical bone and exposure of antrum and attic </li></ul><ul><li>Removal of diseased tissue </li></ul><ul><li>Facial ridges is lowered </li></ul><ul><li>Mastoid cavity is smoothened with polishing burr </li></ul><ul><li>Reconstruction of hearing mechanism </li></ul><ul><li>Meatoplasty </li></ul><ul><li>Closure of wound </li></ul>
  9. 9. Mastoidectomy Procedure
  10. 10. Meatoplatsy <ul><li>Cartilage excision </li></ul>
  11. 11. Meatoplasty <ul><li>Skin flap </li></ul>
  12. 12. Picture of Mastoidectomy showing a large cholesteatoma in the mastoid antrum .
  13. 13. A meatoplasty has been performed to enlarge the external auditory canal and allow easy access to the mastoid bowl for inspection and cleaning. The reconstructed eardrum is seen anteriorly.
  14. 14. Left Canal Wall Down Mastoidectomy. This patient had a modified radical mastoidectomy with tympanoplasty. The posterior bony canal has been removed and part of the dry &quot;mastoid bowl&quot; is visible posterior and superior to the reconstructed tympanic membrane.

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