What is the normal range for respiratory rate in adults?

• A. 8 to 12 breaths per minute
• B. 12 to 20 breaths per minute
• C. 20 to 30 breaths per minute
• D. 30 to 40 breaths per minute

Answer: (B)

The normal range for respiratory rate in adults is recognized as 12 to 20 breaths per minute. This range is considered normal for a resting adult and reflects the body’s requirement for oxygen exchange and carbon dioxide removal during different states of activity and rest.

Respiratory rates outside this range can indicate underlying health issues. For instance, a rate below 12 breaths per minute may suggest bradypnea, which could indicate respiratory depression, while a rate above 20 breaths per minute could signify tachypnea, which may be caused by conditions such as anxiety, fever, or respiratory distress. Understanding these norms is crucial for healthcare professionals in assessing a patient's respiratory function and overall health status.