Gout X3 Flashcards
Gout
inflammatory rthritis with a cardinal feature of hyperuricema
with will precipitate into monosodium urate crystals and that deposties into the joint leading to pain and inflammation
Hyperuricema
eceeding 6.8mg dl
Gout risks
M>F -post menopausal women Advnaced age Pacific islander genetics Comorbid DM, HTN, Obestit, Hyperlipidemia Diet rich in meat or seafood, sugar Etoh and certain meds
Stages of hout
- asymptomatic hyperuricema
- Acute Gouty arthritis
- Intercritical gout
- asymptomatic between gout attacks - Chronic gouty arthritis
- if original gout is left untreated
- involved joints will developed chronic swelling tophi
Acute Gout flare presentation
-often monoarticular ( can be polyarticular)
- 1st MTP is most common location for intial attack
> ankle, heel, wrist, fingers, elbow
- often recurrent but usually the attack is self limiting about 2 wks
Rapid onset (often at night), severe pain, pain peaks 8-12 hours, redness warmth welling,
Medications that can result in gout
Thiazide or loop diuretics low dose aspirn niacin cyclosporine A Urate-lowering medications
Gout Dx
Xray
1.Arthrocentesis and synovial fluid analysis > definitive diagnosis
> polarized light micropscopy looking at monosodium urate chrystals NEEDLE SHAPED and NEGATIVELY BIFRINGENT
2. Serum URic Acid LEvel
- most accurate 2 wks after gout flare
3. Urinary Uric acid
- just to see if they excrete less than <800mg to know if they are a candiade for uricosurc theray
Tx of acute gout flare
Pain/Inflam:
- NSAIDS
- most pt if no contraindications - glucocorticoids
- colchicine
- typically reserved for pt who cannot take NSAIDS
Indication for urate lowering therapy
- frequent gout flares
- structural joint damge
- tophaceous depositis
- CrCl,60ml/min
- recurrent uric acid nephrolithiasis
ULT
Xanthine Oxidase Inhibitors -allopurinol and febuxostat -allo is the agent of choice and we start low and slow * SJS risk Urcosuric Agents - pprobenecid - indicated for underextretors too and requires good renal function -Biologic ULT - Pegloticase IV for refrectory gout
Initiating ULT
Wait till acute flare is over!!! at least 2 wks
- can use prophylactic tx- colchicine or NSAIDS
Pseudogout (CPPD) etilogy
Calcium pyrophosphate christal deposits
- often idiopathic
Risks: jiont trauma ( injury, OS etc), familial chondrocalcinosis
*Hemochromatosis and hyperparathyroidim are in high associated hypomag hypophos
CPPD present
Severe acute inflamation
** Knee is the most common
trauma surgery or severe illness often provoke attack
Radiographic findings of CPPD
Chondrocalcinosis- evidencce of CPP deposists
- can also be associaed with other degenerati changes
Arthrocentesis/ synovial fluid analysis of CPPD
POSIVELY BIREFRINGENT CPP chrystals
rhomboid shaped chrystals
*definitive diagnosis