1. Overview of Brachial Plexus Blocks Flashcards
brachial plexus nerve roots
C5-T1
proximal to distal breakdown of brachial plexus
proximal
Roots
Trunks
Divisions
Cords
Branches
distal
trunks
superior
middle
inferior
divisions
anterior
posterior
cords
lateral
posterior
medial
how are the cords named?
according to relationship to axillary artery
how many branches of the brachial plexus
5
branches of brachial plexus
axillary
radial
ulnar
median
musculocutaneous
does the brachial plexus cover T2?
no
T2 dermatome
upper medial arm
medial forearm nerve
medial cutaneous
lateral forearm nerve
musculocutaneous nerve
shoulder
lateral arm innervation
C5-C7
deltoid innervation
axillary nerve
what nerve roots innervate the medial arm
and medial hand?
C8-T1
posterior medial forearm
posterior elbow innervation
radial nerve (C5-C6)
lateral forearm
lateral anterior elbow innervation
muscolocutaneous nerve
(C5-C7)
medial forearm
medial anterior elbow innervation
medial cutaneous nerve
(C8-T1)
medial hand
(anterior/posterior) innervation
ulnar nerve
(C8-T1)
posterior lateral hand innervation
radial nerve
(C5-C6)
anterior lateral hand
fingertips of first 3.5 digits
innervation
median nerve
(C6-C8)
what does the brachial plexus not block
upper medial arm
can a singular brachial plexus block cover the entire arm/shoulder?
no
4 main brachial plexus blocks
- interscalene
- supracalvicular
- infraclavicular
- axillary
brachial plexus blocks
proximal to distal
proximal
interscalene
supraclavicular
infraclavicular
axillary
distal
interscalene block level
roots
what does the interscalene block
C5-C7
shoulder
lateral arm
what does the interscalene not block
C8-T1
medial elbow
forearm
ulnar sparing
interscalene anesthetizes
shoulder
2/3 of lateral clavicle
most of arm (not med forearm/hand)
what is interscalene great for
shoulder
upper arm
what is interscalene bad for
forearm
elbow
hand
interscalene complications
ipsilateral hemidiaphragmaic paresis
hoarseness
horner’s syndrome
horner’s syndrome
miosis (pupil constriction)
ptosis (droopy eyelid)
anhidrosis (no sweat)
supraclavicular block level
trunks
and
divisions
supraclavicular reliably blocks
C5-C7
C8-T1
entire arm
infraclavicular block level
cords
infraclavicular reliably blocks
C5-C7
C8-T1
entire arm
infraclavicular is not considered for what surgery
shoulder
(more distal insertion sitea)
supraclavicular/infraclavicular disadvantage
poor block of shoulder
supraclavicular pro
avoids complications of interscalene block
is supraclavicular as effective as interscalene?
no - interscalene is more effective
supraclavicular has _______ spread
supraclavicular has less efficient spread to suprascapular and axillary nerves
axillary block level
branches
which branches does the axillary block
median
radial
ulnar
which branches does the axillary not block
musculocutaneous nerve
what does the axillary block well?
hand
how can the axillary block the entire forearm/elbow?
only if performed alongside separate musculocutaneous block
the axillary does not block ________ well
the axiallary does not block the upper arm well
what does the musculocutaneous nerve innervate?
lateral foreaarm
axillary block for forearm surgery
requires separate injection for musculocutaneous nerve
axillary block for hand surgery
no additional block for musculocutaneous nerve
does the axillary block target the axillary nerve?
nope :)
what surgeries are axillary blocks food for?
forearm
hand
what block is good for tourniquet pain during hand surgery?
musculocutaneous nerve block
what block covers T2
intercostobrachial block
intercostaobrachial block is used for
elbow surgery
(medial elbow)
axillary surgery
does the intercostobrachial block help tourniquet pain?
nope
how is the intercostobrachial block performed?
10mL injected subQ in the axillary region
upper border of bicep
lower border of tricep