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analytical variation: how to know if therapy changed lab? examples?
how to see if therapy changed lab, 3SD between 1st and subsequent msmt=95% confident; hemolysis, lipidemia, ictonic
quinidine effect on serum digoxin
increase because quinidine releases digoxin from heart muscle and decreases renal clearance
why do lab techs use controls
Controls distinguish between random variation (inevitable) and systemic error (2x SD)
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