I think most people have been guilty a time or two even if they don't want to admit it. It is unsafe it increases your risk for med errors. When you have 30 or 40 res. to give pills, tx, inj., inhalers, eyedrops to it does sound like a shortcut. Although illegal I'm not saying if it's right or wrong. just never let a state surveyor see it.
I would'nt use wet to dry. not with all the new products available for wound care. its known to damage granulation tissue which is very delicate. I see surgeons order this tx all the time. This women I assume had an amputation R/T diabetes or poor circulation, therefor she is very prone to infections. If it is a fresh surgical wound or clean wound stage 3 or 4 absent of eschar or slough the wound bed only needs to be kept moist, (solosite or other wound moisture gels) being careful to only get gel in wound and not on surrounding tissue also assessed often for infection. If eschar or slough is present you can use a chemical debriment agent first (santyl oint) if an infection is suspected polysporine powder can be mixed with santyl. There is lots of information on wound care and lots of different products to try.