PaCO 2

Definition

PaCO₂ is the partial pressure of carbon dioxide in arterial blood, typically measured in mmHg. It reflects the respiratory component of acid-base balance and is crucial for assessing pulmonary function.

5 Must Know Facts For Your Next Test

1. Normal PaCO₂ levels range from 35 to 45 mmHg.
2. Elevated PaCO₂ levels can indicate hypoventilation or respiratory failure.
3. Low PaCO₂ levels may be a sign of hyperventilation or respiratory alkalosis.
4. Dietary factors, such as carbohydrate intake, can influence CO₂ production and subsequently affect PaCO₂ levels.
5. Assessing PaCO₂ is essential for managing patients with chronic obstructive pulmonary disease (COPD) and other pulmonary conditions.

Review Questions

• What are the normal reference ranges for PaCO₂ in arterial blood?
• How can nutritional intake impact PaCO₂ levels?
• Why is monitoring PaCO₂ important in patients with COPD?

Related terms

Arterial Blood Gas (ABG): A test that measures the pH, oxygen, and carbon dioxide levels in arterial blood.

Hypoventilation: A condition characterized by inadequate ventilation leading to increased blood CO₂ levels.

Hyperventilation: Excessive ventilation leading to decreased blood CO₂ levels and respiratory alkalosis.