exam 2 Flashcards
eye procedures
NEVER insert more than ___ inch
use a ________ needle
1 inch
blunt needle
eye surgery
true or false
GA should always be available
Always have a clinician (eye surgeon) available when block is being performed!
it CAN be the sole anesthetic
true
topical is _______ only
NO akinesia
sensory
LA applied outside/adjacent/posterior vault of cone + around the sclera
Tenon capsule is fascial layer that encapsulates the sclera, it produces a “container” for the block
(similar to TAP) block
sub-tenon
eye
Sensory (analgesia) + akinesia (with LARGE doses)
sub-tenon
eye
sensory only
topical
eye
Sensory (analgesia) + akinesia (must be done on BOTH sides)
peri-bulbar
eye
Sensory (analgesia) + akinesia/motor
retro-bulbar
true or false
PERI-bulbar is SAFER and MORE common
true
what direction should needle go with PERIbulbar block
when advancing through CONJUNCTIVA
________, ________
inferior, lateral
peri-bulbar
R eye = ___-___ o clock
L eye = ___-___ o clock
R = 4-5
L = 7-8
what direction should needle go with PERIbulbar block
UNTIL THE MIDPOINT of eye (halfway)
_________ direction
caudal/posterior
eye
LA deposited directly posterior to the globe (muscle cone space)
retro-bulbar
what 5 nerves does RETRO-bulbar block*
CN 3-7
eye
have patient look at the ________
needle
or
straight ahead
retro-bulbar
1st: __________ approach
2nd: _________ approach
3rd: once halfway, ___________ approach
1st: inferior/caudal/downward
2nd: parallel
3rd: superior, once halfway
eye
which block do you use a smaller volume due to risk for compartment syndrome
retro-bulbar
4 complications of eye blocks
IV injection (seizure)
hemorhagic injury
globe injury
vagal (bradycardia)
true or false
airway block requires combo of 3 blocks
true
what are 4 adjunct drugs for airway blocks
antisialagogue
aspiration prophylaxis
(non-particulate + reglan)
anxiolysis
amnesia
indication for airway block
difficult airway
burn, contracture, spondylitis
most superficial airway nerve
glossopharyngeal (CN 9)
3 areas of sensation for glossopharyngeal (CN 9)
1) posterior tongue
2) pharynx
3) portions of soft palate + epiglottis
3 areas of innervation for SUPERIOR laryngeal nerve*
1) larynx
2) POSTERIOR epiglottis
3) cricothyroid muscle
3 areas of innervation for RECURRENT laryngeal nerve*
1) BELOW vocal cords
2) muscles of larynx (except cricothyroid)
3) deep to the trachea
SUPERIOR laryngeal nerve
identify _______ bone
inject ________ and __________ to the most lateral portion of bone
hyoid bone
lateral, inferior
RECURRENT laryngeal
use a _____________ injection through the _______________ membrane
trans-tracheal injection
through the cricothyroid membrane
best formulation for LA topical
paste
true or false
airway
giving ONLY topical LA for airway is NOT sufficient for scope down the throat
true
digital block
2 nerves lie to the _________/_________ side
ventral/forward side
2 types of approaches for digital block
bilateral injections
trans-thecal (single injection into callous/flexor sheath )
ligaments run ____________/________
longitudinal/vertical
connects
transverse process + spinous process*
lamina
connects transverse process + vertebral body*
pedicle
intrathecal/subdural =
spinal block
what type of approach should you use for THORACIC
paramedian
what type of ANGLE should you use for THORACIC
cephalad (toward the head)
true or false
termination of the spinal cord is NOT abrupt
true
epidural space is located where
posterior to the dura
anterior to the ligamentum flavum
epidural space is ___cm deep
for MIDLINE approach only
5cm deep
do not go deeper!
L&D is deeper
epidural space*
widest = __________
narrow = ___________
widest = posterior/midline
narrow = anterior/inward
INWARD curvature
lordosis
where is lordosis located
cervical
lumbar
OUTWARD curvature
kyphosis
where is kyphosis located
thoracic
kyphosis results in _________ leaning position
forward-leaning
lordosis results in __________-direct spine
posterior-directed
how should a person sit for lumbar placement
kyphosis (opposite of normal)
true or false
PALPATION of landmarks should occur PRIOR to site preparation/cleaning
true
CONTRAindications to central blocks
neuromuscular dx
(MS, MG, increased ICP)
cardiac frailty
unable to tolerate
aortic valve stenosis, HOCM, IHSS
3 types of patients that should NOT receive central block
this is due to dependence on SVR
aortic valve stenosis
hypertrophic obstructive cardiomyopathy (HOCM)
idiopathic hypertrophic subaortic stenosis (IHSS)
true or false
CPR will NOT be effective with patients with HOCM, IHSS, aortic valve stenosis
true