Muscular/FM Flashcards
4 stages of gout?
Stage 1 = Asymptomatic hyperuricemia
Active stage = acute gouty arthritis
Acquired stage = inter-critical gout
Stage 4 = Tophaceous gout
Target serum urate concentration for gout?
360 umol/L = target conc for stage 1-3 gout
300umol/L = target conc for stage 4 gout
Common sites of gouty tophi?
Olecranon bursa
Extensor surfaces of fingers and hands
Ears
1st MTPJ
Why do gout flares come more at night?
Urate crystals precipitate better at lower temp
Diagnostics for gout?
Joint aspiration with polarized light microscopy to find needle-shaped crystals that are negatively birefringent.
Serum uric acid level raised
Renal panel for kidney function
XR findings in gout?
Punched-out lesions with overhanging lesions. Mouse-bitten appearance.
OA changes not seen on gout. Joint space preserved until very late stage.
Compare joint aspiration of Gout vs Pseudogout?
Gout = needle-shaped crystals, negatively birefringent.
Pseudogout = rhomboid-shaped crystals, positively birefringent
Indications for Urate Lowering therapy?
One of these, immediately start ULT
- At least 2 or more gout flares in last year
- Radiographic evidence of erosive gouty arthropathy
- visible tophi
- Urate stones
Mx of acute gout flare?
Non-pharm = rest, ice
Steroids
NSAIDs
Colchicine
Avoid aspirin in acute gout
Avoid NSAIDs in ESRD, PUD
Check renal impairment before Colchicine
How to interpret DEXA BMD scan?
normal patient = Above -1
Osteopenic = -1 to -2.5
Osteoporosis = -2.5 or below
Look at T-score of 3 parts of pt’s skeleton = spine, hip, NOF. any of them below -2.5 = enough to diagnose osteoporosis
OSTA score for risk of osteoporosis?
Below 0 = low risk. Dont need BMD test
0-20 = minimal risk. Do BMD if pt has other RFs
Above 20 = high risk. Continue with BMD
Calculate with “Age in years - Weight/kg”
FRAX score for osteoporosis??
10 year risk of having osteoporotic fracture. Aids decision on starting treatment.
Start treatment if one of following is met:
- 20% or more
- if risk of hip frac 3% or higher
Start treatment for osteoporosis if 1 or 3 following criteria met?
- fragility frac
- BMD T score below -2.5
- If pt is osteopenic by BMD DEXA, but pt has high FRAX score
3 things to be careful for bisphosphonate?
It slows bone loss by increasing osteoclast cell death
Take at least 30 mins before any food, drink or meds
Must sit up for 30 mins after taking med
Cannot have Cr clearance below 30
and ofc, watch out for ostenecrosis of jaw
MOA of bisphosphonates?
e.g. alendronate
Slows bone loss by increasing osteoclast cell death.
Osteoclasts degrade bone to initiate normal bone remodeling and mediate bone loss in pathologic conditions by increasing resorptive activity.