Test Taking Tip
Familiarize yourself with the table below for wound classification and general indication for antibiotic therapy.
Name factors that influence the development of infection:
Poor approximation of tissue, hematoma/seroma, hypothermia, long operation (>2 hours), excessive local tissue destruction/necrotic tissue, low blood flow, foreign body, dead space, and strangulation of tissues by tight sutures
|Wound Class ||Definition ||Infection Rate |
|Clean ||Nontraumatic, elective wound without acute inflammation ||2% |
|Clean-contaminated ||Wounds associated with operation on biliary, GU tract, or respiratory or GI tract without gross contamination ||3%–5% |
|Contaminated ||Traumatic wound, GI tract spillage, acute inflammation, or a major break in sterile technique ||5%–10% |
|Dirty ||Dirty traumatic wound, perforated viscous, or presence of pus ||30% |
Most common nosocomial infection:
How many colony-forming units (CFUs) are needed on urine culture to confirm a diagnosis of UTI?
Most common nosocomial infection causing death:
Overall most common organism in surgical wound infections:
Most common anaerobe in surgical wound infections:
When do wound infection classically arise?
Treatment for a wound infection:
Remove sutures/staples, culture wound, examine to rule out fascial dehiscence, leave wound open and pack, start antibiotics
Bacteria that will cause wound infection and fever within 24 hours after surgery:
Organisms that can cause necrotizing soft tissue infections:
Usual organism to cause necrotizing fasciitis:
Time period to wait before obtaining a CT scan to look for postoperative abscess:
Findings on CT scan to indicate abscess:
Usual initial treatment for intraabdominal abscess:
Most common bacteria to cause a line infection:
How many CFUs are needed from a central line culture to indicate line infection?
In what instance should a central line be changed over a guidewire?