Bone and Serum Concentrations of Five Cephalosporin Drugs Relevance to Prophylaxis and Treatment in Orthopedic Surgery

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Abstract
Bone and serum concentrations of five cephalosporins were assayed in 92 patients undergoing elective hip or knee prosthetic joint arthroplasty. One hundred twenty-five bone samples were assayed. Although there was no direct relation between serum and bone antibiotic concentrations, a trend toward increased bone antibiotic concentration for drugs with higher serum levels and longer half-lifes (cefazolin and ceforanide) was noted. Bone antibiotic concentrations were maximal within 60 minutes of drug administration. Although bone antibiotic concentrations following 2-g doses were greater than those following 1-g doses, the differences were not statistically significant. A trend toward higher bone antibiotic concentrations at hip surgery was noted, and this difference achieved statistical significance (p

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