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.
Potassium is important to heart function. 1  Your doctor may order this test if you have signs of high blood pressure or heart problems. 2  Small changes in potassium levels can have a big effect on the activity of nerves and muscles, especially the heart.