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sinus anatomy
sinus anatomy for comp
Question | Answer |
---|---|
What make up the paranasal sinuses? | frontal, ethmoid, sphenoid and maxillary sinuses |
What bones are the sinuses found in? | maxillae (2) (maxillary sinuses), frontal, ethmoid, sphenoid |
Name the divisions of the ethmoid sinuses | anterior air cells, middle air cells, posterior air cells |
Function of the sinuses | resonating chamber for voice, decrease the weight of the skull, warm and moisten inhaled air, shock absorber |
Paranasal sinuses are located where? | frontal, ethmoidal, sphenoidal and maxillary bones. |
Which sinuses are the firs to form? | the maxillary are present at birth |
When do the later occurring air cells form? | at 6-7 years |
Approximate lateral sinus technique | 70 at 8 |
Approximate technique waters for sinuses | 75 @ 28 |
What position should the patient be in for sinus x-rays and why? | upright for presence of fluid |
Why should we avoid angling the tube for sinus x-rays? | it distorts the fluid levels |
Shielding considerations for sinuses | shield pregnant women and the thymus of children |
Which are the largest sinuses? | maxillary |
Second largest sinuses? | frontal |
Piece of anatomy that divides the frontal sinus | intersinus septum |
Name the air cells of the ethmoidal sinus | anterior, middle, posterior |
What can occur with over-penetration of the sinuses? | diminished or obliterated pathology |
What can occur as a result of under-penetration of the sinuses? | can simulate pathology |
What FSS should be used for sinus x-rays? | small |
Which sinuses are demonstrated on a lateral projection? | sphenoid, ethmoid, maxillary, frontal (all of them) |