Respiratory rate:每分钟呼吸的次数,或者更正式, the number of movements indicative of inspiration and expiration per unit time. In practice, therespiratory rateis usually determined by counting the number of times the chest rises or falls per minute. The aim of measuring respiratory rate is to determine whether the respirations are
normal, abnormally fast (tachypnea), abnormally slow (bradypnea), or nonexistent (apnea).
