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sinus posit comp

sinus positioning for comp

QuestionAnswer
Lateral sinuses positioning IPL perpendicular, MSP and IOML parallel to IR
CR entry lateral sinuses perpendicular entering ½” to 1” posterior to outer canthus
Eval criteria lateral sinuses superimposed orbital roofs, superimposed mandibular rami, sella turcica in profile.
Pt. position for Caldwell for sinuses nose and forehead on bucky
CR entry Caldwell for sinuses OML 15 degrees to IR, CR exits nasion
Alternate name for Caldwell PA axial
Structures shown on Caldwell sinuses frontal, ethmoid and sphenoidal sinuses.
Eval criteria Caldwell sinuses petrous ridges in lower 1/3 of orbit, no rotation
Where should the frontal sinuses be projected on a Caldwell? above the frontonasal suture
Where should the anterior ethmoid air cells be projected on a Caldwell? on each side of the nasal fossae
Where should the sphenoidal sinuses be projected on a Caldwell? through the nasal fossae
Where are the sphenoid sinuses located in relation to the other sinuses? middle and posterior
Where are the ethmoidal air cells located in relation to the other sinuses? middle and anterior
Where are the maxillary sinuses located in relation to the other sinuses? directly inferior to the ethmoid
Approximate technique for lateral sinuses? 70 at 8
Approximate technique for waters 75 at 28
Created by: annaluz87