POCUS - Ocular Flashcards
What position should the patient be in for ocular US?
Supine with head straight forward
The two views that you should scan the eye in are ______________.
sagittal (dot cephalad) and transverse (dot to the patient’s right)
True or false: the lens is in the anterior chamber.
False
It is posterior to the anterior chamber.
Why is it important to maximize the gain in ocular US?
Vitreous hemorrhage is usually small and can be missed if the gain is too low.
The most common cause of vitreous hemorrhage is _______________.
posterior vitreous detachment
Vitreous hemorrhage appears like what?
A lacy, echogenic material in the anechoic center of the eye
Why do you need to obtain a clip of the patient looking around if a hemorrhage is suspected?
Hemorrhage will move in a fluid motion, whereas detached vitreous and retina will not
Which structure is more echogenic, vitreous membrane or retina?
Retina
The ___________ is always attached to the optic nerve, so this can be a helpful diagnostic aid.
retina
Normal optic sheat nerve diameter is less than ____ mm.
5
This is for adults. Infants is 4.0 mm and children is 4.5 mm Note, the measurement is averaged over three.
The optic nerve sheath should be measured where?
3 mm posterior to the anechoic portion of the globe
How sensitive is US for retinal detachment?
97%
