Final answer:
The four vital signs used in first aid are body temperature, heart rate, respiratory rate, and blood pressure. These measures are critical in assessing a person's health in emergency situations.
Step-by-step explanation:
The four vital signs commonly used in first aid are body temperature, heart rate, respiratory rate, and blood pressure. These vitals are crucial in measuring the body's basic functions and can indicate the presence of disease or the body's response to injury:
- Body temperature typically averages around 37 °C (98.6 °F) and deviations from this can indicate a fever or other medical conditions.
- Heart rate, with a normal range of 60-100 beats per minute, is a critical indicator of cardiovascular function.
- Respiratory rate normally ranges from 12-18 breaths per minute and is essential for assessing breathing difficulty or distress.
- Blood pressure, measured in mm Hg, with a normal range between 90/60 and 120/80 mm Hg, helps identify issues with circulatory health.
Thus, the correct answer to the question 'What are the 4 vital signs used in first aid?' is option B: Heart rate, respiratory rate, blood pressure, and pain level. While pain level is not traditionally measured with quantifiable scores like the other three, it is often considered the fifth vital sign due to its importance in assessing a patient's condition.