Is Single-Dose Antibiotic Prophylaxis Sufficient for Any Surgical Procedure?

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Abstract
The objective of perioperative prophylaxis is to prevent postoperative infections, which are the primary cause of morbidity and mortality in patients undergoing surgery today. One cannot predict with certainty when bacterial contamination at the operative site may occur during surgery. Furthermore, it has been suggested that the period of highest risk may actually be at the end, rather than at the beginning, of the operation. Therefore, the effect of antimicrobial prophylaxis ideally should cover the entire perioperative "period of risk". It should be remembered that the period of risk for postoperative infection may last substantially longer than the actual surgical procedure. The duration of the risk period also may vary based on a number of other factors, such as the age and general condition of the patient, presence of concomitant disease, amount of blood loss during surgery, and number of blood transfusions required. Antimicrobial prophylaxis that provides coverage throughout the entire perioperative period of risk will reduce not only the risk of wound infections but may also reduce the danger of other types of infectious complications. Numerous clinical studies have clearly shown that appropriately-timed "single shot" prophylaxis is as effective as multiple-dose prophylaxis. This paper considers the evolution of this therapeutic intervention and reviews the opportunities available for antibiotic prophylaxis in surgery, with particular attention to the long-acting cephalosporin, ceftriaxone.

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