Nursing Acceleration Challenge Exam (NACE) PN-RN Practice Test 2026 – All-in-One Resource to Excel in Your Exam!

In a patient experiencing respiratory distress, the respiratory rate is the most concerning vital sign because it directly reflects the patient’s ability to breathe effectively and maintain adequate oxygenation. An increased respiratory rate may indicate that the body is attempting to compensate for insufficient oxygen or increased carbon dioxide levels due to impaired gas exchange. Proper assessment of respiratory rate can provide vital information about the severity of the respiratory distress and the need for immediate interventions.

While blood pressure, heart rate, and temperature can provide important information about a patient's overall health status, they do not specifically indicate the effectiveness of a patient’s respiratory function. Blood pressure can be influenced by a range of factors including fluid status and cardiac output, heart rate can increase due to anxiety or pain, and temperature may indicate infection. However, in the context of respiratory distress, changes in the respiratory rate are the most direct indicator of the patient's breathing status and urgency of care required.