Gout/crystal arthropathy Flashcards
What is gout
Rapid onset crystal arthritis
Typical presentation of gout acute
intense pain and swelling, acute attacks typically affect the first metatarsal-phalangeal joint (MTP of the great toe
What is gout triggered by
Hyperuricaemia due to pruine breakdown -> accumulation of monosodium urate crystals
Who does gout affect
Mot common men 30-50
Risk factors for gout
Genetics - FH
Diet - purine rich foods
Alcohol
Metabolic syndrome - DM, lipids, HPTN
Renal function - CKD
Meds - thiazide diuretics, asporon, anti-TB
Chronic gout features
tophi formation 9nodules of crystals surrounded by crhonic uinflammation), joint damage, and chronic pain.
When does gout appear and resolve
Max severity in 24 hours, resolves 5-15 days
Where can be affected in gout
First MTP on foot
Other joints of the feet, ankle and knee
Joints of the hand, wrist and elbow.
It rarely affects more central joints such as hip and spine.
Features of joint gout
Intense stabbing pain
Eythema
Joint swell + tenderness -> decreased ROM
Investigaitons for gout
Clinical features and historu
Synovial fluid aspiration if nexessary
Serum uric acid after 4-6 weeks or chronic gout
Clinical diagnosis
Criteria for gout diagnosis
Mono-articular involvement of a foot/ankle joint
Previous episodes of a similar nature
Rapid onset
Erythema
Male
What need to screen for when diagnosis of gout made
CVS risk and risk of kidney disease
When to use synovial fluid analyiss
Only when diagnosis unsure or spetic arthritis suspected
What is gold standarard investigation for gout
Fine needle aspiration is 100% sepcific
Differntiates gout and pseudogout
What crystals are found in gout
Monosodium nitrate
negative birefrigent
Needle shaped