Calcium, Ionized

A Calcium, Ionized test measures the level of active, free calcium in your blood. Unlike the total calcium test, which measures all forms of calcium, ionized calcium specifically assesses the form directly involved in vital bodily functions such as muscle contraction, nerve function, and blood clotting. This test is more accurate in reflecting calcium levels affecting these processes, making it particularly useful in critical care settings or when total calcium levels are inconclusive.