Exam 2 Flashcards
What is the most common nerve injury in the lithotomy position?
Peroneal nerve injury
__ minutes of pressure on the eye will make your patient blind
20
__ embolism is a bad complication of the sitting position.
Air
Most common peripheral nerve injury is __ neuropathy
Ulnar
Atlantoaxial subluxation is associated with __ arthritis, note any patient taking steroids or methotrexate. Get flex-ex X-rays, if instability exceeds 5mm, intubate awake
Rheumatoid
Axillary roll should be __ to (just below) the axilla.
Caudad
Most common physiologic consequence of positioning __
Postural hypotension
Fibrosis of the conduction system and loss of SA node cells increases dysrhythmias, esp. __ fib and flutter
atrial fib and flutter
geriatrics- maximal heart rate decreases by about 1 beat per minute per year greater than age __, and have decreased baroreceptor reflex
50
Geriatrics have less chronotropic response to catecholamines due to decreased __ receptor sensitivity, but not decreased number of receptors.
beta
geriatrics have a delayed onset of IV drugs but __ induction with inhalational agents
faster
normal physiological responses in geriatrics, increased chest wall rigidity, decreased muscle strength = decr. cough, decr. max breathing capacity. BLUNTED response to __ and __
hypercapnia
hypoxia
if your GRF is down, you will filter drugs __
slower
decreased liver mass means __ slower drug metabolism
slower
increased gastric pH means __ rate of gastric emptying
decreased
geriatrics have decreased requirements for injected and inhaled anethetics and are more susceptible to __
delirium
OD is the __ eye, dang right!
right
OS is the __ eye
Left
OU is the __ eye
Both
What is the most common eye injury?
Corneal abrasion
Normal intra ocular pressure is __ to 20 mmHg
12
Glaucoma is obstruction to the __flow of aqueous humor, IOP greater than 20 mmHg
Outflow
Can you use glycopyrrolate with glaucoma?
NO
Inhalational agents and IV anesthetics __ IOP
Decrease
Ketamine __ IOP
Increases
Non depolarizers __ increase IOP
Do NOT
What is the most common cause of postop blindness? __ optic neuropathy due to optic nerve infarction
Ischemic optic neuropathy
Succs increases IOP 5-10 mmHg for __ to __ minutes causing extrusion of ocular contents through an open surgical or trauma wound
5-10 mmHg for 5-10 minutes
Retro bulbar block CAN cause __ reflex
Oculocardic reflex
Should you give nitrous with a detached retina?
__ no!
How long does it take for SF6 gas to dissolve out of the eye?
10 days
Echothiopate is an irreversible cholinesterase inhibitor to treat glaucoma, and will prolong the duration of __ and the effects last _-7 weeks
Succs
3-7 weeks
