Gout

A swollen, red big toe at 3 AM after a steak dinner isn't cellulitis or a fracture — it's a metabolic crystal attack, and the nursing priorities are counterintuitive.

Gout is a crystal arthropathy caused by hyperuricemia — serum uric acid above 6.8 mg/dL — leading to monosodium urate crystal deposition in joints. The hallmark presentation is acute monoarticular inflammation, most commonly the first metatarsophalangeal joint (podagra). Attacks often strike at night and are triggered by purine-rich foods (organ meats, shellfish, red meat), alcohol (especially beer), dehydration, or rapid uric acid fluctuations. During an acute flare, the joint is exquisitely tender, erythematous, warm, and edematous — even a bedsheet touching it causes severe pain. Serum uric acid may be paradoxically normal during an acute flare, so a normal level does not rule out gout. Diagnosis is confirmed by joint aspiration showing negatively birefringent needle-shaped crystals under polarized microscopy. Acute management uses colchicine, NSAIDs, or corticosteroids — not allopurinol, which is for chronic prevention and should not be initiated during an acute flare (patients already on allopurinol should continue it). Nursing priorities include elevating and protecting the affected joint, encouraging fluid intake of 2–3 L/day to promote uric acid excretion, providing a low-purine diet, and monitoring renal function since urate crystals can cause kidney stones and nephropathy.

Key Distinctions

Don't confuse gout (monoarticular, crystal-driven, acute onset, uric acid elevation) with rheumatoid arthritis (polyarticular, autoimmune, symmetric, gradual). Students commonly mistake septic arthritis for gout — both present with a hot, red joint, but septic arthritis is a medical emergency requiring culture and IV antibiotics. Allopurinol should not be started during an acute flare — this is a classic NCLEX trap — but patients already taking it should continue it throughout the flare.

Clinical Pearl

Purines up, uric acid up, crystals down — into the joint. Think: beer and steak tonight, screaming toe by morning.