Triage means "to sort" so you are correct when you say it is used to priortorize the order in which patients are seen by their acuity as well as other factors. The plan of care is the responsibility of the RN/MD collaboratively in most ED's. After you identify the problem the patient has come to the ED for, your plan of care is your documentation of the diagnostics, procedures, medications and other nursing implementations that are used while in your ED. It is probably not labled on most ed forms as plan of care. Sometimes it is found on the flowsheets or nursing notes. Most of the regulating agencies would like for it to be more clearly identified. As a nurse it is your responsibility to make sure the documentation of the patients response to those things that you have implemented is present and identifable. I'm sure you probably have all those things included in your ED chart already. Hope this was helpful.