Shared Flashcard Set

Details

Principles 2, Exam 3, Eyeball anesthesia slides 21-29
rounding the last turn, starting on the home stretch
18
Nursing
Graduate
11/08/2009

Additional Nursing Flashcards

 


 

Cards

Term
Spell Amaurosis fugax and then define it.
Definition
Amaurosis fugax-transient monocular vision loss due to embolism or hypoperfusion
Term
The opthalmic artery is the (blank) branch off the internal carotid. Why do I care?
Definition
First, this increases the risk for embolism and amaurosis fugax.
Term
Aqueous humor is formed at a rate of?
Definition
2-3ml min
Term
where and how is aqueous humor made?
Definition
it is made in the ciliary processes which are covered by epithelial cells, active transport of Na into spaces between the cells, followed by Cl and bicarb (to maintain electrical neutrality) which produces an osmotic gradient for water from neighbouring tissue to follow.
Term
Aqueous humor is made in the _________ chamber. It then flows into the ________ chamber and is reabsorbed by what structure?
Definition
posterior, anterior, canal of schlemm
Term
The canal of schlemm is made up of an endothelial membrane that only permits movement of small particles through, like ions and water. T or F
Definition
False, the membrane is very porus, it allows proteins and particulate matter into the canal
Term
What is the normal IOP?
Definition
12-20 mmHg
Term
How is IOP determined in relation to aqueous humor?
Definition
It is determined by the rate of formation and the rate of outflow
Term
What is the main pathology associated with glaucoma?
Definition
decreased aqueous humor outflow, which increases IOP
Term
How does an increase in venous pressure increase IOP?
Definition
by drcreasing aqueous humor outflow and increasing blood in the choroid
Term
Temporary increases in IOP in a healthy eye are compensated by....
Definition
an increase in aqueous or vitreous humor drainage which equalizes the pressure
Term
A rise in IOP in an open globe injury can cause what?
Definition
spilling of eye contents, blindness
Term
I will give the variable, you tell me how it affects you IOP
1. increased CVP
2. decreased CVP
3. increased PaCO2
4. Decreased PaCO2
Definition
1. greatly increases IOP
2. greatly decreases IOP
3. moderatly increases IOP
4. moderatly decreases IOP
Term
Volatiles produce a reduction in IOP, how?
Definition
reduced BP and choriodal blood volume, relaxation of extraocular eye muscles, pupillary constriction (facilitates aqueous humor outflow)
Term
How does ketamine increase IOP?
Definition
increased BP, nystagmus, myoclonic muscle activity and increased eye muscle tone
Term
Theoretically, why would you not want to use anticholinergics in glaucoma?
Definition
they can produce mydriasis, which can precipitate closed angle glaucoma and reduce aqueous humor outflow
Term
how does succs affect IOP (i want numbers)
Definition
it causes prolonged contracture of EOM and increases IOP by 5-10 mmHg for 5-10 minutes
Term
If my pt is going in for eye surgery that will require the monitoring of IOP, should I use succs? why or why not
Definition
probably not, succs increases IOP over 5-10 minutes and it also can cause faulty IOP measurements over 20 minutes.
Supporting users have an ad free experience!