Wound infection rate

Wound infection rate in ASA patient

• Class I or II : 1.9%
• Class III or IV : 4.3%

Surgical wound infection rates by wound class, operative procedure, and patient risk index. National Nosocomial Infections Surveillance System. Am J Med 1991;19(Suppl 3B):125S-157S. 


Wound infection rate in duration of the operation 

• < 1hr : 1.3%
• > or = 3 hr :4.0%

Cruse PJ, Foord R. A five-year prospective study of 23,649
surgical wounds. Arch Surg 1973;107:206-



Rate of infection กับ time of administration 
   พบว่า ถ้าได้ preoperative drug or post operative drug > 2hr จะเพิ่ม rate of infectionนะจ๊ะ