"The wound has been cleaned and treated."
Translation:Lukanya sudah dibersihkan dan diobati.
"me-X-kan" means that you cause something to be X. In this case, "dibersihkan" means that the wound is being made bersih/clean.
"me-X-i" means to give X to something. In this case, "diobati" means that the wound is given obat/medicine or treatment.
So it depends on the root word and what you want it to mean.