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Chapter 11 Part 5. Temporal Bone Paranasal Sinuses. Petrous Pyramids. Dense portion on temporal bone Houses ___________ ___________. The Ear. 3 Portions External Middle Inner. External Ear. ____________ Tragus __________. Middle Ear. 3 parts ________________

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chapter 11 part 5

Chapter 11Part 5

Temporal Bone

Paranasal Sinuses

petrous pyramids
Petrous Pyramids
  • Dense portion on temporal bone
  • Houses
    • ___________
    • ___________
the ear
The Ear
  • 3 Portions
    • External
    • Middle
    • Inner
external ear
External Ear
  • ____________
  • Tragus
  • __________
middle ear
Middle Ear
  • 3 parts
    • ________________
    • Tympanic __________
    • _____________
tympanic cavity
Tympanic Cavity
  • Contains ________________
  • Epitympanic recess (Attic)
    • _______________
  • Tympanic cavity proper
    • Larger
    • Inferior aspect
    • _________________
      • Passage from middle ear to _______________
      • Equalizes pressure
ossicle articulations
Ossicle Articulations
  • _____________
    • Attached to tympanic membrane
    • Receives vibrations and relates to
  • ______________
    • Transmits vibrations from Malleus and passes on to
  • ____________
    • Smallest
    • Transmits vibrations to oval window
internal ear
Internal Ear
  • Area of hearing and equilibrium
  • Contains 2 parts
    • __________________
    • __________________
      • Area within the osseous labyrinth
osseous labyrinth
Osseous Labyrinth
  • 3 parts
    • _____________
      • For hearing
      • Round window
    • _____________
      • Oval window
    • ____________________
      • For equilibrium
internal acoustic meatus
Internal Acoustic Meatus
  • Area of auditory and facial nerves
  • _______________best to visualize
mastoids
Mastoids
  • Inferior portion of ___________
  • Mastoid air cells
    • Connects to middle ear from ________ by way of the __________
  • Due to this direct connection infection can reach ________________
sinuses
Sinuses
  • ________________
    • Lined with mucus membranes
  • Surrounding the nasal cavity
  • All _______________ with each other by way of nasal cavity
osteomeatal complex
Osteomeatal Complex
  • Area where __________is collected
  • Made of
    • __________- Nasal Conchae (Turbinates)
    • __________ – Spaces between conchae
  • From the osteomeatal complex to the nasal cavities
sinuses con t
Sinuses Con’t
  • Maxillary (2)
  • Frontal (usually 2)
  • Ethmoid (Many)
  • Sphenoid (1 or 2)
maxillary sinus antrum of highmore
Maxillary Sinus“Antrum of Highmore”
  • ________________
  • Located in the body of maxillary bones
    • Lateral to Nasal cavity
  • Communicates to osteomeatal complex by way of _______________into middle nasal ____________ (Separated by uncinate process of ethmoid)
frontal sinus
Frontal Sinus
  • Located between ______________table of skull in frontal bone
    • Posterior to glabella
  • Can have 2 (most common) or 1 large sinus
    • _______________
  • Communicate to osteomeatal complex by Ethmoid sinus through ______________
ethmoid sinus
Ethmoid Sinus
  • Located within the ethmoid bone _______________
  • Many _____________
    • Anterior, middle, posterior collections
  • Communicates with the osteomeatal complex directly by way of anterior collections and drains into ____________
sphenoid sinus
Sphenoid Sinus
  • Located in the body of the sphenoid bone
    • Inferior to __________
  • Can have ____________
  • Communicates to the osteomeatal complex by way of the _______________
imaging the sinuses
Imaging the sinuses

Routine

________________________

  • Waters (Parietoacanthial)
  • PA Caldwell
  • Right or Left Lateral
  • SMV
  • 40” SID
  • 70-80 kVp
waters
Waters
  • Tip of chin on IR Nose ½ to 1” off
  • ________________ perpendicular
    • OML forms 37°
  • Mid sagittal line perpendicular
  • CR to exit ___________________
  • Open mouth can show
    • _________________
pa caldwell
PA Caldwell
  • PA Projection, Upright
  • __________________
    • ______________and OML Perpendicular
  • Mid sagittal plane perpendicular
  • CR to exit ______________
lateral
Lateral
  • Right or left site dependant of area of interest or department protocol. Upright
  • Place pt into anterior oblique
  • _____________perpendicular to IR
  • _______________to front of cassette
  • CR to enter between ____________________
slide23
SMV
  • Upright
  • Tilt head back so ______________to IR
  • Mid sagittal perpendicular
  • CR to enter between _______________
ct invasion
CT Invasion
  • Thin ________________
  • Better visualization of ___________ complex