SSI Prevention Is Not One Thing
Surgical site infections arise from the interaction of multiple variables across the entire surgical pathway. Understanding this as a system — not a single intervention problem — is the foundation of effective prevention.
Five Domains of SSI Risk
Each domain represents a category of modifiable risk factors. Effective SSI prevention requires addressing all five — no single domain is sufficient in isolation.
Patient Factors
The patient's own biology and health status significantly influence SSI risk and must be assessed before surgery.
- Comorbidities: diabetes, hyperadrenocorticism, renal disease
- Immune status and concurrent immunosuppressive therapy
- Body condition score — obesity elevates risk independently
- Coat and skin condition near the surgical site
- Prior infections, colonization, or resistant organisms
Surgeon Behavior
The discipline and consistency of surgical behavior — from hand hygiene to sterile field maintenance — is among the highest-impact modifiable variables.
- Surgical hand scrub technique and compliance
- Sterile gowning and closed gloving discipline
- Sterile field maintenance throughout the procedure
- Tissue handling: hemostasis, dead space elimination, gentle dissection
- Operative time — longer procedures correlate with higher SSI rates
Environment
The operating room environment is a modifiable source of microbial contamination that is frequently underestimated and under-managed.
- OR air quality and positive-pressure ventilation
- Door openings and personnel traffic during procedures
- Surface contamination and inter-case cleaning protocols
- Temperature and humidity within HVAC guidelines
- OR occupancy — excess personnel increase particulate counts
Operative Technique
The technical quality of the surgical procedure directly determines tissue viability, contamination risk, and the conditions under which healing will occur.
- Tissue handling: minimize trauma, devitalization, and crushing
- Hemostasis: control of bleeding prevents hematoma formation
- Dead space elimination through layered closure
- Foreign body and implant management
- Surgical draping integrity and maintenance
Post-op Care
The postoperative period represents the final critical window for SSI prevention — from wound protection through monitoring and stewardship decisions.
- Wound dressing: application, integrity, and change intervals
- Bandaging technique and complication monitoring
- Owner education on wound signs and activity restriction
- Structured recheck protocols and early detection
- Evidence-based antibiotic stewardship decisions
“No single intervention prevents SSI. The evidence consistently shows that bundles — combinations of interventions applied reliably — produce the best outcomes.”
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