SSI @ Surgical Side Infection@ Surgical Wound

This is a very favorite question of my Surgeon,(MR.Selvan) almost all new houseman will be asked to answer this question.

Basically, the surgical wounds can be categorized into 4 types :

1.Clean wound - a superficial wound, which do not enter into any hollow organ ( respiratory, GIT, urinary system)
** Only 2% rate of infection from this type of wound
***Antibiotics given for this wound if --> immunocompromised ; can cause catosphoric* event which involves CNS or CVS ; use of implant/foreign bodies; (I forgot the 4th factor..huhu)

2. Clean contaminated wound - wound that enter into hollow organs ( respiratory, GIT, urinary) without any spillage(pus, bile)
**Rate if infection is 6-9%

3. Contaminated wound - wound that enter into hollow organs ( repiratory, GIT, urinary) with contact with spillage ( pus,bile,feces)
**Rate of infection is 13-20%

4. Dirty wound - wound that already has pus, abcess or any trauma wound which already contaminated
**Rate of infection is 40%

There's 2 website that tells in detail about all the wounds, check out this 2 sites;
1. Overview of surgical site infection
2. Surgical dressings

If there is any mistakes on the material above, please let me know so that i can correct it.. heheh ;)