Which sinus is contained and part of the facial bones
maxillary sinus
The frontal ethmoid and sphenoid sinuses are contained where
in cranial bones
what are the four sinuses and how many of each
maxillary 2
sphenoid 1 or 2
ethmoid many
frontal 2
what is the older term for the maxillary sinus
antrum of highmore
the frontal sinuses become aerated before what age
6
where are the ethmoid sinuses contained
lateral masses or labyrinths of the ethmoid bone
what is the pathway of communication between the frontal maxillary and ethmoid sinuses that help with drainage of these cavities
osteomeatal complex
Obstruction of the osteomeatal complex results in what
sinusitis
the maxillary sinuses drain through what
infundibulum passageway
what process makes up the medial wall of the infundibulum passageway
uncinate process
what structure receives drainage from the frontal and ethmoid sinus cells
ethmoid bulla
what are the key passageways in the osteomeatal complex
infundibulum and middle nasal meatus
Cr for a right or left lateral sinuses
cr midway between outer canthus and EAM
What sinuses are shown in the lateral position
all four frontal maxillary ethmoid sphenoid
Rotation is evident in a lateral sinus position by what structure
Tilit is evident by what
symmetry of mandibular rami and greater wings of sphenoid
orbital roofs and great sph wings
How do we position the OML for a caldwell of the sinuses
where is the CR exiting
Cr is parallel to what
place patient OML perp to IR and then tilt or elevate the chin 15 deg
exits the nasion
floor
In order to assess air fluid levels the in the sinuses the the cladwell position must be performed ____
erect w/ a horizontal beam
what is the alternative method to the caldwell for the sinuses
tilting the IR 15 deg
what structures are demonstrated in the caldwell position
Frontal sinuses projected above frontonasal suture anterior ethmoid air cells are visualized lateral to each nasal bone below frontal sinuses
No rotation or tilt is indicated by what structure in a caldwell
equal distance of MSP identified by crista galli
superior orbital fissures visualized in the orbits
what size casette do you need for all sinuses
what is the routine
8x10
lateral (R or L )
waters
caldwell
In a waters position the OML forms what deg with IR and where is the CR exiting for a waters
37 deg
cr centered to exit at acanthion
structures demonstrated in waters view
maxillary sinuses w/ the inferior aspcet visualized from superimposing alveolar processes and petrous ridges, inferior orbital rim and oblique view of frontal sinuses
where is cr for smv of the sinuses
If the patient cannot get the IOML parallel to IR what must we do to suffice
1.5-2in inferior mandibular symphyses
angle to as much as needed to keep the CR perp to IOML
anatomy demonstrated in an smv view
sphneoid sinuses ethmoid sin nasal fossae and max sinuses
Is aec reccommended for doing sinuses
no
what anatomy is demonstrated in a parietoacanthial transoral projection
sphenoid sinuses visualized thru open mouth oblique view of frontal sinuses maxillary sinuses w/ inferior aspect visualized
which lateral is done for the sinuses
affected side
which sinuses begin to develop at the fetal birth
7 years and older
6-7years
fetal : maxillary
7 years: ethmoid sinuses
6-7 years: frontal and sphenoid
what is the sinus that lies most posterior
sphenoid
which sinuses are part of the facial bone structure
maxillary
the sphenoid sinus us located anterior and inferior to what structure in the sphenoid bone
sella turcica
It is important to take sinus radiographs in the erect position because fluid will remain trapped in the ____ sinuses in this position