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.
Your doctor may order a potassium test during a routine physical or for a variety of other reasons, including: 1  checking for or monitoring an electrolyte imbalance. 2  monitoring certain medications that affect potassium levels, particularly diuretics, heart medications, and high blood pressure medications.