NSGY and Ortho Flashcards
neurapraxia
no axonal injury; temporary loss of function
axonotmesis
disrupt axon, not sheath; will improve
neurotmesis
disrupt axon and sheath; might need OR
growth of nerve
1mm/day
salutatory conduction
nodes of ranvier in nerve
regulation of ADH
hyperosmolar serum causes supraoptic nucleus of hypothalamus to release in posterior pitutary gland
when to operate on subdural vs epidural
subdural 1cm
epidural 0.5 cm
MC intracerebral hematoma
temporal lobe ; drain only if focal deficits
Cushings triad
- HTN
- brady
- low RR
spinal shock level
above T6
anterior spinal cord syndrome
injury to anterior spinal artery
(vert body burst fx, aortic problem, ruptured disc)
b/l loss MOTOR, PAIN, TEMPERATURE below lesion
proprioception and light touch are FINE.
Borwn Sequard syndrome
hemisection
(penetrating injury)
loss of IPSILATERAL MOTOR and CONTRALATERAL PAIN/TEMP below lesion
central cord syndrome
(hyperextension of spine, old people with sponylosis)
*MC MC MC spinal cord injury**
b/l loss ofUPPER EXTREMITY MOTOR, PAIN, TEMPERATURE
cauda equina
LOWER EXTREMITY pain and weakness due to compression of lumbar nerve roots, loss rectal tone, perineal saddle asnethesia, distended bladder
mgmt: decompression emergently.
spinothalamic
pain temp DORSAL
corticospinal/rubrospinal tract
motor VENTRAL
dorsal vs ventral nerve roots
dorsal: AFFERENT
ventral: MOTOR
MC brain tumor
glioma (esp glioma multiforme)
meninigioma mgmt
resect
MC met to brain
lung
MC children brain tumor
medulloblastoma
MC metastatic brain tumor in children
neuroblastoma
acoustic neuroma origin
8th CN at cerebellopontine angle (vetigo, hearing loss)
mgmt; resect
MC spinal tumor
neurofibroma
intradural tumor vs extradural malignant potential
extradural is most likely malignant
paraganglionoma
check for metanpehrines
intraventricular hemorrhage = subependymal
premies rupture GERMINAL MATRIX
mgmt: drain
myelomeninigocele
neural cord defect esp LUMBAR
spinal cord and nerve roots herniate through!
wernicke’s location
temporal; left; speech comprehension
brocas location
posterior frontal; speech motor
brain abscess drainage indication
2.5cm (otherwise just ABx)
Causalgia
reflex sympathetic dystrophy…
cosntant burning pain if you touch the area (cold cyanotic, moist)
mgmt: sympathetctomy
salter harris fx I-V
I: epiphysiolysis of growth plate (no fx)
II: metaphys fx
III: growth plate and epiphysis fx
IV: fx crosses epiphysis, growth palte and metaphysis
V: crush of growth plate witout fx (growth plate closes prematurely)
salter harris fx mgmt
I and II: CRIF
III-V; growth plate affected so need ORIF
JOnes fx
5th metatarsal fz (ass’d nonunion)
fx ass’d compartment synd
supracondylar humerus (ant interosseous aa), tibia (ata), calcaneus (idk)
fx ass’d avascular necrosis
scaphoid, femoral neck, talus, hip dislocation
obturator nerve
super gluteal n
inf gluteal n
fem nerve
obturator nerve: hip adduction
super gluteal n: hip abduction
inf gluteal n: hip extension
fem nerve: knee extension
L3-S1 function
L3: hip flexion
L4: knee extension(patellar)
L5: dorsiflexion, sensation to big toe
S1: platarflex (Achilles), sensation lateral foot
ulnar nerve function
intrinsic motor, finger abduction, wrist flexion, sensory to pinky
injury = CLAW HAND DEFORMITY
median nerve function
thumb apposition, OK, finger flexors, sensory to all but pinky
radial nerve
wrist extension, finger extension, triceps, sensory back of fingers
axillary nerve
motor to deltoid
shoulder dislocation risks ant vs post
ANTERIOR: axillary NERVE (CRIF)
POSTERIOR (electrocution): axillary ARTERY (CRIF)
monteggia fx
FOOSH. proximal ulnar and radial head dislocation
mgmt: ORIF
Colles fx
FOOSH. distal radius
mgmt: CRIF
nursemaids elbow
sublux of radius at elbow from pulling on extended pronated arm
mgmt: CRIF
metacarpal fx
4th adn 5th from punching
mgt: ulnar gutter splint CRIF, +/- K wires
Volkmanns contracture
anterior interosseous artery injury from supracondylar humerus fx causing reperfusion injury after CRIF… forear compartment
dupuytrens contracture
palma fascia of hand proliferates mostly 4th and 5th digits (can’t extend)
mgmt: NSAIDs, steroids, excise fascia
carpal tunnel syndrome
median nere compression by transverse carpel ligament
mgmt: splint, NSAIDs, steroids, transverse carpal ligament release
trigger finger
tenosynovities of flexor tendon at MCP joint
mgmt: splint, tendon sheath steroid injection vs release MCP joint
suppurative tenosynovitis mgmt
midaxial longitudinal I&D
posterior hip dislocation injury
SCIATIC NERVE injury; presents internally rotated with adduction
mgmt: CRIF
anterior hip dislocation injury
FEMORAL ARTEYR injury; externally rotated with abduction
mgmt: CRIF
lateral knee injury will affect what
ACL, PCL, MEDIAL MENISCUS
ACL injury dx
anterior drawer test
foot eversion injury to? after compartment fasciotomy
superficial peroneal nerve
foot drop injuyr to?
comon peronal nerve (after fibula head fraction / lithotomy / crossed legs)
compartment lower leg contents
anterior: anterior tibial aa, deep peroneal NERVE
lateral: superficial peroneal NERVE
deep posterior: posterior tibial aa, peroneal aa, tibial NERVE
superficial posterior: sural NERVE
SCFE
AVN to femoral head, painful hip
XR: widening of epiphyseal plate
mgmt: EMERGENT Surgical pinning of femoral head
Legg Calve Perthes disease
AVN to femoral head (younger kids) hypercoagulable maybe
painful hip
XR; flat head
mgmt: limit ROM it will be OK
genu varum vs valgus
varum: younger. BOW legs; ass’d BLOUNT disease (medial tibial plate abnormality)
valgus: KNOCK KNEE. slightly older 4-8 YO
talipes equinovarus (clubfoot)
serial casting
MC bone tumor
met (breast lytic > prostate blastic)
mgmt bone tumor
radiate
MC primary malignant bone tumor
multiple myeloma
dx multiple myelmoa
XR: lytic lesion, Bence JOnes protein in urine, Igg on blood smear
mgmt multiple myeloma
chemotherapy
osteogenic sarcoma
10-25 YO
XR: codmans triangle = periosteal reaction (sunburst)
mgmt osteogenic sarcoma
doxorubicin neoadjuvant then resect and radiate
ewings sarcoma
less common.
5-15 YO (younger) diaphysis o long bones
XR: onion skinning
MCtumor in general
osteochondroma (can curette and bone graft if tsymptomatic)
giant cell tumor mgmt
total resection +/- radiation
both bone
CRIF kid
ORIF adult
developmental hip dysplasia
gluteal asymm folds
dx: US (XR not calcified)
tx: pavlik harness x 6 mos
osgood schlatter
tibial tubercle apophysitis (osteochondrosis)
from traction injury to quads … tibial tubercle pain
conservative