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Evaluation of the Antibiotic Removal Device.

ABSTRACT

A new system called an Antibiotic Removal Device (ARD), used for the removal of residual antibiotics in blood specimens, was studied in 300 patients diagnosed as clinically septic despite antimicrobial therapy. Blood specimens from these patients were processed with and without the ARD into aerobic and anaerobic media. There were 53 patients who had one or more positive blood culture bottles, for a total of 109 positive blood culture bottles. Of these 109 bottles, 33.9% were positive with ARD-processed blood in aerobic media, 24.8% with ARD-processed blood in anaerobic media, 22.9% with conventionally processed blood in aerobic media, and 18.3% with conventionally processed specimens in anaerobic media. After 6 h of incubation, 14 bottles with blood processed by the ARD and 9 bottles processed conventionally were positive; after 24 h, 48 bottles with blood processed by the ARD and 31 bottles processed conventionally were positive. The same organisms were isolated from both ARD- and conventionally processed blood, with four exceptions. The ARD system, when compared with a conventional system of blood specimen processing, significantly increased the detection of bacteremia and decreased the time required for its detection in patients clinically septic despite ongoing antimicrobial therapy.

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