280.Which pair of venous structures contributes to the confluence of
dural sinuses on the interior surface of the occipital bone?
a. Sigmoid and transverse sinuses
b. Inferior sagittal and cavernous sinuses
c. Occipital and straight sinuses
d. Transverse and inferior petrosal sinuses
e. Superior petrosal and occipital sinuses
281.A 19-year-old teenager comes into the emergency room (ER) at 5:00 PM
with cotton in his nose and blood running down the front of his T-shirt
nearly to his belt. He was in the ER the night before. The previous night,
gauze soaked in procoagulant had stopped the problem, but not now. No
history of trauma was reported. Upon removing the blood soaked gauze,
blood pumped from an artery on Kiesselbach’s area, on the nasal septum,
just superior and posterior to the external nasal aperture. An ENT was
called in to cauterize the boy’s nose. There are four major blood vessels that
normally supply blood to Kiesselbach’s area. Describe how, for at least two
of the arteries, you could have the boy apply pressure elsewhere (not
directly on the pulsating artery) that may successfully cut off blood to the
pulsating artery, while the ENT cauterizes the blood vessel.
a. Hold both sides of the bridged of the nose at the apex from the exterior.
b. Hold both sides of the upper lip between his fingers.
c. Hold both sides of the nose at the junction of the nasal bones with the lateral
nasal cartilages.
d. Apply pressure from the oral cavity over the incisive foramen.
e. a and b
f. b and d
282.Which of the following is the most direct route for spread of infection
from the paranasal sinuses to the cavernous sinus of the dura mater?
a. Pterygoid venous plexus
b. Superior ophthalmic vein
c. Frontal emissary vein
d. Basilar venous plexus
e. Parietal emissary vein
Head and Neck 411