Surgical Site Antisepsis

Clinical Objective

Select and correctly apply antiseptic agents to achieve maximal reduction in viable organisms at the surgical site immediately prior to draping and incision. Agent selection and application method must be matched to the site anatomy and patient characteristics.

Protocol Steps

1. 1

   Select the appropriate antiseptic agent based on site location, patient skin integrity, and institutional protocol.

2. 2

   For most body surface sites: use 2% chlorhexidine gluconate in 70% isopropyl alcohol.

3. 3

   For mucous membranes, perineum, or ears: use diluted (0.05–0.5%) chlorhexidine aqueous solution.

4. 4

   Apply using a sterile sponge or applicator; do not contaminate the agent container.

5. 5

   Work from the cleanest (incision center) to the least clean (periphery) in continuous outward strokes.

6. 6

   Allow full drying time before applying drapes — alcohol-based agents require complete evaporation.

7. 7

   Document the agent used and application time in the surgical record.

Key Pitfalls to Avoid

• Applying antiseptic with a back-and-forth wiping motion rather than a consistent outward pattern.

• Using alcohol-containing prep solutions near ignition sources without ensuring complete drying.

• Applying concentrated chlorhexidine to mucous membranes or the eye — causes irreversible damage.

• Pooling of solution under the patient during prep — contact time is important, but pooling causes chemical burns.