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.
What the Results of a Potassium Test Mean. Your body needs potassium to function normally. It is vital to the functioning of nerve and muscle cells. A normal potassium level is between 3.6 and 5.2 millimoles per liter (mmol/L).