Overview and Clinical Importance
Wound management is a foundational skill for every veterinarian. Whether treating surgical incisions, traumatic lacerations, or chronic non-healing wounds, understanding the principles of wound classification, healing phases, closure techniques, and bandaging is essential for optimal patient outcomes. This topic integrates anatomy, physiology, pharmacology, and surgical technique into practical clinical application.
On the BCSE, wound management questions often present clinical scenarios requiring you to select the appropriate closure method, identify factors delaying healing, or choose the correct bandaging technique. Expect questions that integrate concepts across multiple domains.
High-YieldWound management questions frequently appear in both the Surgery domain AND the Medicine domain. Understanding these principles will help you answer questions across multiple sections of the exam.
| Class |
Description |
Examples |
SSI Risk |
| Class I: Clean |
Surgical incisions made under aseptic conditions. Does NOT enter GI, respiratory, or urogenital tracts. No inflammation present. Primary closure used. |
Spay/neuter, orthopedic procedures, inguinal hernia repair, thyroidectomy |
1-5% |
| Class II: Clean-Contaminated |
Controlled entry into GI, respiratory, or urogenital tract without significant spillage. Minor break in technique. |
Cystotomy, gastrotomy, cholecystectomy, elective GI surgery |
3-11% |
| Class III: Contaminated |
Fresh traumatic wounds (less than 6 hours old). Major break in aseptic technique. Gross spillage from GI tract. Acute non-purulent inflammation. |
Recent gunshot wounds, recent lacerations, enterotomy with spillage |
10-17% |
| Class IV: Dirty/Infected |
Old traumatic wounds (greater than 12 hours). Clinical infection present. Perforated viscus. Necrotic tissue, pus, or fecal contamination. |
Perforated bowel, abscess drainage, bite wounds with purulent discharge |
Greater than 27% |
| Wound Type |
Description |
Clinical Considerations |
| Abrasion |
Loss of epidermis and partial dermis due to friction |
Painful, low infection risk, heals by epithelialization |
| Laceration |
Irregular wound from tearing force, variable depth |
Requires thorough exploration for underlying damage |
| Puncture |
Penetrating wound from sharp object, minimal skin damage |
HIGH infection risk - assess for deep tissue damage and foreign bodies |
| Avulsion/Degloving |
Tissue torn away from underlying structures |
Often requires delayed closure, skin grafting, or second intention healing |
| Incision |
Clean-edged wound made by sharp instrument |
Best prognosis for primary closure when created aseptically |
Section 1: Wound Classification
The surgical wound classification system, originally developed by the National Research Council and refined by the CDC, categorizes wounds based on their bacterial contamination level. This system predicts surgical site infection (SSI) risk and guides antibiotic prophylaxis decisions.