What do blood pressure monitoring devices primarily measure?

Blood pressure monitoring devices are specifically designed to measure the force exerted by circulating blood on the walls of blood vessels. This measurement is crucial for assessing cardiovascular health and can help in diagnosing conditions such as hypertension. The primary function of these devices is to provide accurate systolic and diastolic blood pressure readings, which reflect the pressure in the arteries during and between heartbeats, respectively. The proper functioning of these devices is essential for effective patient monitoring and management of various health issues related to blood pressure, making the option focused on blood pressure the correct choice in this context.