[A pharmacokinetic study of diffusion in adenomatous prostatic tissue of an intravenous bolus of cefamandole].

Twenty-three patients undergoing transurethral resection of the prostate for benign prostatic hypertrophy received antibiotic prophylaxis with a second generation cephalosporin, cefamandole, administered by a single IV bolus of 2.5 g. A pharmacokinetic study was performed on blood and resection chips collected at regular intervals. Cefamandole penetrates rapidly into the prostate without any saturation threshold. It diffuses less extensively and persists for a shorter period in elderly subjects, but penetrates to an identical degree regardless of the volume of the adenoma. The prostatic concentration was always higher than the minimal inhibitory concentration for the bacteria generally encountered, except for pseudomonas. The pharmacokinetic study of cefamandole therefore demonstrated that an IV bolus of 2.5 g is perfectly suitable for antibiotic prophylaxis prior to prostatic resection.