Broviac Dressing Change: Weekly, and whenever it gets wet, dirty, or is coming off. Steps: 1. Wash your hands. 2. Gather supplies: Chloraprep, a Biopatch, a clear occlusive (sealed) dressing. 3. Open the supplies and keep them in their sterile package. 4. Remove old dressing: Lift edges of dressing first and pull slowly, work your way into the ...