Residential Care / Assisted Living: What Is Residential Care for the Elderly? Residential Care Facilities for the Elderly (RCFE) serve persons 60 and older. They provide room, board, housekeeping, supervision, and personal care assistance with basic activities like personal hygiene, dressing, eating, and walking.
A potassium test is used to measure the amount of potassium in your blood. Potassium is an electrolyte important for the functions of cells.
1 U and Es test â this stands for 'urea and electrolytes' and shows if there is too much or too little sodium or potassium in your blood. 2  These are important for the overall function of your heart and also help asses kidney function. 3  Imbalances in the blood can be linked to medication that you may be taking.