Comparison of two concentrations of amphotericin B bladder irrigation in the treatment of funguria in patients with indwelling urinary catheters

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The efficacy of amphotericin B bladder irrigation at two concentrations was studied.Patients with funguria (>or=to15,000 colony-forming units of yeast per milliliter of urine), an indwelling urinary catheter, and a physician order for amphotericin B continuous bladder irrigation were randomly assigned to receive 10 or 50 mg of amphotericin B per liter of sterile water as a continuous irrigation for 72 hours at the rate of 42 mL/hr. Before the bladder irrigation began, the indwelling catheter was changed to a three-way catheter. Repeat urine cultures were performed 24 hours after the irrigation was discontinued.A total of 28 patients were enrolled from November 1993 to May 1995.The rate of eradication of the infection was 100% in the 50-mg/L group and 67% in the 10-mg/L group. Subject enrollment was stopped prematurely because all the treatment failures occurred in the 10-mg/L group. Dose was the only variable significantly associated with outcome.Bladder irrigation with amphotericin B was more effective when the drug concentration was 50 mg/L rather than 10 mg/L.Am J Health-Syst Pharm. 1999; 56:872-5

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