Canadian Practical Nurse Registration Examination (CPNRE) 2026 – 400 Free Practice Questions to Pass the Exam

In the context of respiratory acidosis, elevated CO2 levels are a hallmark laboratory finding. Respiratory acidosis occurs when the lungs cannot effectively expel carbon dioxide (CO2), leading to its accumulation in the blood. This occurs due to various reasons such as chronic obstructive pulmonary disease (COPD), respiratory muscle weakness, or severe respiratory infections.

As CO2 levels rise, they react in the blood to form carbonic acid, which decreases the pH of the blood, resulting in acidosis. Consequently, it is this accumulation of CO2 that is directly responsible for the metabolic alterations observed in respiratory acidosis, leading to a decrease in blood pH.

Observations of elevated CO2 levels are critical in diagnosing this condition and managing it appropriately, aiming to alleviate the underlying causes to restore gas exchange and correct the acid-base balance.