1. Temporal Bone Paranasal Sinuses
Chapter 12/13
Temporal Bone
Paranasal Sinuses

2. Petrous Pyramids
Dense portion on temporal bone
Houses
______________

3. The Ear
3 Portions
__________

4. External Ear
____________
Tragus
EAM

5. Middle Ear 3 parts ______________(ear drum) Tympanic cavity
Auditory ____________

6. Tympanic Cavity Contains Auditory Ossicles ___________________(Attic)
Superior aspect
________________proper
Larger
Inferior aspect
________________
Passage from middle ear to nasopharynx
Equalizes pressure

7. 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

8. Internal Ear Area of hearing and equilibrium Contains 2 parts
______________Labyrinth
______________ Labyrinth
Area within the osseous labyrinth

9. Osseous Labyrinth 3 parts ______________ ____________ _____________
For hearing
Round window
____________
Oval window
_____________
For equilibrium

10. Internal Acoustic Meatus
Area of ______________-nerves
____________best to visualize

11. Mastoids Inferior portion of Temporal bone _____________
Connects to middle ear from ________ by way of the __________
Due to this direct connection _______ can reach mastoid air cells.

12. Sinuses Air filled _____________ Surrounding the ______________
Lined with mucus membranes
Surrounding the ______________
All communicate with each other by way of nasal cavity

13. Osteomeatal Complex Area where ___________ is collected Made of
_________- Nasal Conchae (Turbinates)
_________ – Spaces between conchae
From the ____________complex to the nasal cavities

14. Sinuses Con’t Maxillary (2) Frontal (usually 2) Ethmoid (Many)
Sphenoid (1 or 2)

15. Maxillary Sinus “Antrum of Highmore”
____________
Located in the body of ____________
Lateral to Nasal cavity
Communicates to osteomeatal complex by way of ______________ into middle nasal meatus (Separated by ____________of ethmoid)

16. Frontal Sinus
Located between inner and outer table of skull in frontal bone
Posterior to ___________
Can have 2 (most common) or 1 large sinus
Irregular shaped
Communicate to osteomeatal complex by Ethmoid sinus through _______________

17. Ethmoid Sinus Located within the ethmoid bone lateral masses
Many ________________
Anterior, middle, posterior collections
Communicates with the osteomeatal complex directly by way of anterior collections and drains into ____________

18. Sphenoid Sinus Located in the body of the sphenoid bone
______________
Can have 2 or 1 sinus
Communicates to the osteomeatal complex by way of the _______________

19. ________________________
Imaging the sinuses
Routine
________________________
Waters (Parietoacanthial)
PA Caldwell
Right or Left Lateral
SMV
40” SID
70-80 kVp

20. Waters Tip of chin on IR Nose _____________ MML Line perpendicular
OML forms 37°
Mid sagittal line perpendicular
CR to exit ________________
Open mouth can show
_____________

21. PA Caldwell PA Projection, Upright OML ________________
___________and OML Perpendicular
Mid sagittal plane perpendicular
CR to ________________

22. Lateral
Right or left site dependant of area of interest or department protocol. Upright
Place pt into anterior oblique
Interpupillary line perpendicular to IR
___________to front of cassette
CR to enter between __________________

23. SMV Upright Tilt head back so _____________to IR
Mid sagittal perpendicular
CR to enter between _________________

24. CT Invasion Thin _______________
Better visualization of _________complex