Diagnosis and Management of Superficial Incisional Surgical Site Infections

Diagnostic Criteria

The Infectious Diseases Society of America defines superficial incisional SSI as involving only the subcutaneous space between skin and underlying muscular fascia, occurring within 30 days of surgery, with at least one of the following findings: local signs and symptoms of pain or tenderness, swelling, and erythema, purulent incisional drainage, positive culture of aseptically obtained fluid or tissue, or diagnosis by the attending surgeon or physician based on clinical judgment 1, 2, 3
Local signs and symptoms of pain or tenderness, swelling, and erythema are present in patients with superficial incisional SSI 1, 2, 3

The timing at 10 days post-cesarean section is typical for SSI development, as these infections rarely occur in the first 48 hours and most commonly appear between days 4-6 postpartum 1, 4
Assess for systemic signs that would indicate more serious infection requiring antibiotics, including temperature >38.5°C, heart rate >100-110 beats/minute, WBC count >12,000 cells/µL, or erythema extending >5 cm from incision edge 1, 6
If systemic signs are absent and erythema is <5 cm, antibiotics are unnecessary, and the primary treatment is opening the incision and drainage 1, 2, 3

Any infection developing within 48 hours post-cesarean section suggests highly virulent organisms and requires immediate surgical exploration 1, 4
Watch for signs of necrotizing infection, including rapidly spreading necrosis, crepitus, severe pain out of proportion to findings, or skin color changes from pale to bronze to purplish-red 4