MSK and trauma Flashcards
XR features in septic arthritis
- may be normal initially or show only soft tissue swelling
- later features - bone destruction, subluxation, narrowing of spaces, erosive changes
- wide spaces suggests effusion
Kocher criteria for septic arthritis
- temp >38.5
- increased ERSR
- increased WCC
- non-weight bearing
antibiotic usually given in septic arthritis
flucloxacillin, clindamycin if allergic
given 6-12 weeks
which arteries are inflamed in GCA
posterior ciliary arteries
why can GCA cause visual disturbances
secondary to anterior ischaemic optic neuropathy
when to consider Takayusu’s in GCA
if <55
investigations for GCA
- ESR >50
- temporal artery biopsy (skip lesions?)
retinal appearance in GCA
- pale papilloedema
- ischaemic disc is pale, waxy, elevated
- splinter haemorrhages
at which level is a prolapsed disc most common
L4-5 or L5-S1
what to consider as a differential for spinal cord compression
if on steroids - may have caused some proximal myopathy
will have a normal neurological exam other than some wasting/maybe reduced hip flexion which is symmetrical
neurological signs of spinal cord compression depending on level of lesion
- lesions above L1 = UMN signs in legs
- lesions below L1 = LMN signs in legs and perianal numbness
analgesia to use in osteoarthritis
- topical NSAIDs + paracetamol
- if ineffective - oral NSAIDs + PPI
most common sites of fragility fractures
- vertebrae
- hip (proximal femur)
- wrist (distal radius)
risk assessment to do in those on oral steroids over 3 months
FRAX tool for osteoporosis
first line bisphosphonate to use in osteoporosis
alendronate
review after 5 years (3 years for zolendronic acid)
drug to use for osteoporosis in severe osteoporosis in postmenopausal women and men at high risk of fracture
strontium ranelate - increases MI risk
what is palindromic RA
relapsing/remitting mono arthritis of different large joints
what is a poor prognostic factor in RA
positive rheumatoid factor (positive in 70% but can also be raised in Sjogren’s Felty’s SLE etc)
more specific antibody in RA
anti-CCP antibodies
FBC findings in RA
normocytic, normochromic anaemia and reactive thrombocytosis
ESR and CRP may be increased
DMARDs to use in RA
- monotherapy +/- short course prednisolone
- give methotrexate, or sulfasalazine, hydroxychloroquine, leflunomide
when to give TNF inhibitors in RA
if inadequate response to at least 2 DMARDs including methotrexate
E.g:
- etanercept
- adalimumab
- infliximab
condition associated with GCA
polymyalgia rheumatica
bloods results in PMR
- ESR >40
- raised CRP
- ALP raised in 30%
- CK and EMG NORMAL
histology in PMR
- vasculitis with giant cells
- skip lesions
- muscle bed arteries most affected
dose of prednisolone to give in PMR
15mg/d PO
reduce dose slowly
most need for >2 years (remember GI and bone protection)
2nd line drugs for PMR after prednisolone
- methotrexate
- tocilizumab
drugs which can precipitate gout
diuretics
cytotoxic
what is Lesch Nyhan syndrome
X-linked recessive disorder causing gout, renal failure, neurological deficits
joint aspirate in gout
negatively birefringent crystals
drugs to give in acute gout attack
NSAIDs + colchicine
if contraindicated - prednisolone 15mg/day
what to give for gout remission if allopurinol contraindicated
febuxostat
aim for serum uric acid <300
risk factors for pseudogout
- hyperparathyroidism
- hypothyroidism
- haemochromatosis
- acromegaly
- low magnesium, low phosphate
- Wilson’s disease
joint aspirate in pseudogout
positively birefringent rhomboid shaped crystals
XR finding in pseudogout
chonedrocalcinosis