click below
click below
Normal Size Small Size show me how
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) |