Which vital sign is the fourth to be recorded?

The correct answer is blood pressure, which is typically the fourth vital sign measured in a standard sequence of vital sign assessment. When assessing a patient's vital signs, healthcare professionals generally follow a systematic order: first measuring temperature, then heart rate, followed by respiratory rate, and finally blood pressure. This sequence ensures that a comprehensive and consistent approach is taken to evaluate the patient's physiological status.

Blood pressure is crucial as it provides insight into the cardiovascular system, reflecting how well the heart pumps blood and the condition of the blood vessels. Understanding blood pressure readings is integral for monitoring conditions such as hypertension or shock. The sequence of recording these vital signs is essential for maintaining accuracy and effectively identifying any changes in a patient's condition.