Jaynstein - Lower Back Pain Flashcards
what diagnosis should you use for the 85% of patients who have lbp that can not be attributed to a specific dz
nonspecific lbp
do not give specific dx until it is absolutely proven
7 rare conditions that must be ruled out with lbp
ankylosing spondylitis
compression fx
cancer
cauda equina
symptomatic herniated disc
spinal infxn
spinal stenosis
2 red flag conditions for lbp that providers mc get sued over
cauda equina
spinal infxn
lbp peaks at __ ages
55-64
mc cause of activity limitation in persons < 45 yo
lbp
2 primary goals for lbp in primary care setting
prevention of disability
identify red flags
definitions of lbp from acute to chronic
acute: < 4 weeks
subacute: 4-12 weeks
chronic: > 12 weeks
7 rf for lbp
psychological
congenital
smoking
occupation
prior episode
physical unfitness
increasing age
strongest rf for developing lbp
psychosocial factors
8 red flags w. lbp
trauma
unexplained wt loss
neuro sx
age > 50
fever
IVDU
steroids
hx cancer
lbp w. recent chiropractor manipulation is concerning for
vertebral dissection
when is lbp considered metastatic dz until proven otherwise
pt w. hx of ca
3 cancers that mc metastasize to spine/bone
breast
lung
prostate
4 characteristics of lbp related to ca
unexplained wt loss
pain > 1 mo
failure to improve w. conservative tx
night time pain
work up for suspected lbp related to ca (2)
CBC
plain films
4 mc causes of spinal infxn
urinary infxn
indwelling catheter
skin infxn
IVDU
t/f: fever is a sensitive indicator of spinal infxn
f!!
only 40% sensitive overall
PE finding that is relatively sensitive/specific for lbp related to spinal infxn
spinal tenderness -> specific focal pain
lab work up for spinal infxn (5)
UA
CBC
blood cultures
lactate
ESR
most sensitive lab to detect spinal infxn
ESR!
imaging of choice if you suspect spinal infxn and ESR is positive
MRI w. and w.o contrast
if negative -> high rule out sensitivity
compression fx mc occur in what pt pop
osteoporosis -> caucasian > 70 yo
what pt population w. lbp is a compression fx until proven otherwise
pt’s on longterm steroids
order of imaging for compression fx
- plain films -> first line
- if negative, CT w.o contrast
2 surgical procedures used for compression fx
kyphoplasty
vertebroplasty
5 screening factors for ankylosing spondylitis
morning stiffness
improvement w. exercise
onset of pain at age < 40 yo
slow pain progression
pain > 3 mo
t/f: screening for ankylosing spondylitis is specific
f!
cornerstone characteristic of lbp related to ankylosing spondylitis
reduced flexion
work up for ankylosing spondylitis (3)
HLA B27
pelvic xray
lumbar spine xray
pelvic xray finding of ankylosing spondylitis
bilateral, symmetric sacroilitis
lumbar spine xray finding of ankylosing spondylitis
bony sclerosis
bamboo spine
95% of pt’s w. symptomatic disc herniation have __
sciatica