Slough is easy to remove using a q-tip. It's stringy, usually yellow in color, and won't "stick" to the wound. If it doen't come up easily, even after rinsing the wound with sterile saline, then it may be adipose tissue and should be left alone. Go to www.kci1.com and click on the education link. There are videos, photos, and docs with full training on there for each type of VAC.
Most wound VAC companies do NOT have nurses working the field anymore as reps due to cost constraints. Although the reps, territory managers, and such are well trained, they are not nurses. You can find nurses "in-house" when you call the 1-800 number for KCI and when the nurse calls the agency/clinic/office for wound care updates. I recommend talking with them. They are highly trained, have constant updates, and are happy to talk with you about your concerns. Good luck!