Clinical Practice Guidelines for Antimicrobial Prophylaxis in Surgery – 2013 update

Infectious Disease Society of America (IDSA) released update guidelines 1 for antimicrobial prophylaxis in surgery 2. Some of the key points in the update include:

  • The optimal for administration is now within 60 minutes prior to incision. This is more specific than the previous “induction of anesthesia” timing in the previous recommendations. Drugs like vancomycin should be administered within 120 minutes prior to incision.
  • Increased dosing for obese patients is now recommended. Use 3gm of cefazolin (Ancef) for patients weighing >120kg
  • Intraoperative redosing is recommended for procedures lasting more than two half lives of the drug. Redose cefazolin (Ancef) for procedures lasting greater than 4 hours (cefazolin half life is  2 hours). Time for re-administration should be measured from the first antibiotic dose and not the start of the procedure.
  • Duration of prophylaxis should be less than 24 hours for most procedures.
  • Routine use of vancomycin is not recommended for any procedure but should be considered for patients known to be colonized with MRSA or those at high risk for colonization is the absence of surveillance data.
  • The guidelines now have details for many specific surgical procedures.