30. Spinal Anesthesia Flashcards
cervical vertebrae
7
thoracic
12
lumbar
5
sacrum
5
coccyx
4
spinal tissue encounter order
skin
supraspinous
interspinal
ligamentum flavum
dura matter
subarachnoid space
adult spinal cord end
L1-2
peds spinal cord end
L2-3
what does the dural sheath innervate
bladder
GU
conus medullaris
end of spinal cord
cauda equina
nerve fibers extending caudally from spinal cord
filum terminale
fibrous tissue that connects conus medullaris to periosteum of coccyx
faster blockade
smaller
myelinated
proximity to injection
easiest to hardest to block
autonomic>sensory>motor
spinal can be the primary anesthetic for which cases
lower abdominal
inguinal
urogenital
rectal
lower extremity
spinal: absolute CI
infection
lack of consent
coagulopathy
severe hypovolemia
incr ICP
aortic/mitral stenosis
sepsis
warfarin: neuraxial
normal PT/INR
or
discontinue for 1 wk
rivaroxaban: neuraxial
discontinue 72 hrs prior
apixaban: neuraxial
discontinue 72 hrs prior
NSAIDS: neuraxial
no need to delay
clopidogrel: neuraxial
discontinue 5-7 days prior
clopidogrel AKA
plavix
anticoags
warfarin
rivaroxaban
apixaban
anticoags
NSAIDS
clopidogrel
low-dose SC heparin: neuraxial
delay 4-6 hrs after 5000 units
systemic heparin: neuraxial
delay 4-6 hrs and correct PTT
wait 1 hr after neuraxial event to admin
low dose LMWH: neuraxial
delay 12 hrs from admin
high dose LMWH: neuraxial
delay 24 hrs from admin
when would lateral positioning for a spinal be beneficial?
hip fractures
spinal kit
spinal needle
3mL syringe w/18ga needle
5mL syringe
18g introducer
25g skin local needle
filter tube or needle
0.75% hyperbaric bupivacaine
lidocaine
needle holder
sterile drape
sterila paper towel
iodine w/sponges
gauze
***epi
cutting needle
better for calcified ligaments
pencil point
better tactility
less incidence of PDPH
standard spinal needle size
25g 3.5”
a longer needle means
longer time for CSF to return
tuffiers line
body of L4
sometimes L4-L5 interspace
what should you mark on spinal pt
superior aspect of inferior spinous process
inferior aspect of superior spinous process
what do you use to localize in spinal
25g needle
3mL syringe
1% lidocaine
where should you insert needle for spinal
inferior aspect of the interspaceq
os
bone
os shallow
midline but need to redirect cephalad
os deep
off midline
heme
blood