Diagnostic medical equipment and supplies help clinicians to measure and observe various aspects of a patient's health so that they can form a diagnosis. Once a diagnosis is made, the clinician can then prescribe an appropriate treatment plan. Diagnostic medical equipment is found in outpatient care centers for adult and pediatrics, in emergency rooms, as well as inpatient hospital rooms and intensive care units. The following list is not exhaustive, but it provides an overview of some of the most commonly used diagnostic tools. Stethoscopes Stethoscopes are probably the most recognizable of all medical diagnostic tools. They are used to listen to heart sounds, the lungs, and even blood flow in the arteries and veins. Stethoscopes help diagnose: Pneumonia Bronchitis Heart palpitations Heart disease Arrhythmia Heart valve issues Stethoscopes are also used along with a sphygmomanometer to measure blood pressure.