friction rub
chest pain with inspiration
low-grade fever

• ↑ serum creatinine [normal 0.6 - 1.3 mg/dL]
• Creatinine is an end product of protein & muscle metabolism
• Increases only when at least 50% of renal function is lost
• ↑ blood urea nitrogen (BUN)  [normal 8 - 25 mg/dL]
• BUN is a byproduct of protein metabolism in the liver
• Other factors can elevate BUN: dehydration, high-protein diet, corticosteroid use, GI bleeding, infection, etc.
• When BUN and creatinine levels increase at the same rate & the ratio remains constant, ↑ creatinine and BUN suggest renal dysfunction.
• Creatinine clearance test
• Evaluates how well the kidneys remove creatinine from the blood
• Provides the best estimate of the GFR (normal = 125 mL/min)

(Source: ourloveandtrials, via smithja4114)