What is the normal range for arterial carbon dioxide tension (PCO2)?

What is the normal range for arterial carbon dioxide tension (PCO2)?

• A. 20-30
• B. 30-40
• C. 35-45
• D. 40-50

Answer: (C)

The normal range for arterial carbon dioxide tension (PCO2) is considered to be between 35 and 45 mmHg. This range reflects the balance between carbon dioxide production in the body and its elimination through respiration. A PCO2 within this normal range indicates effective ventilation and proper respiratory function, which is crucial for maintaining acid-base homeostasis in the bloodstream. When PCO2 levels fall below 35 mmHg, it may suggest hyperventilation or inadequate CO2 production, leading to respiratory alkalosis. Conversely, a PCO2 above 45 mmHg can indicate hypoventilation or impaired gas exchange, which could result in respiratory acidosis. Understanding these ranges is essential for assessing a patient's respiratory status and overall metabolic function, guiding appropriate clinical interventions.

The normal range for arterial carbon dioxide tension (PCO2) is considered to be between 35 and 45 mmHg. This range reflects the balance between carbon dioxide production in the body and its elimination through respiration.

A PCO2 within this normal range indicates effective ventilation and proper respiratory function, which is crucial for maintaining acid-base homeostasis in the bloodstream. When PCO2 levels fall below 35 mmHg, it may suggest hyperventilation or inadequate CO2 production, leading to respiratory alkalosis. Conversely, a PCO2 above 45 mmHg can indicate hypoventilation or impaired gas exchange, which could result in respiratory acidosis.

Understanding these ranges is essential for assessing a patient's respiratory status and overall metabolic function, guiding appropriate clinical interventions.