Anesthesia Technician Practice Exam

How is hypercapnia defined?

1. Low CO2 levels in the blood

2. Normal levels of CO2 in the blood

3. Abnormally elevated CO2 levels in the blood

4. Insufficient oxygen levels in the blood

The correct answer is: Abnormally elevated CO2 levels in the blood

Hypercapnia is defined specifically as the condition of having abnormally elevated levels of carbon dioxide (CO2) in the blood. It typically occurs when there is insufficient ventilation or impaired gas exchange in the lungs, leading to an accumulation of CO2. This can result from various respiratory disorders, such as chronic obstructive pulmonary disease (COPD), respiratory failure, or conditions causing hypoventilation. Recognizing this definition is crucial, especially in clinical settings, as hypercapnia can lead to respiratory acidosis and various physiological disturbances. It emphasizes the importance of maintaining proper ventilation and monitoring CO2 levels in patients, particularly those with respiratory issues. The other definitions do not accurately describe hypercapnia; one option refers to low CO2 levels, another one describes normal CO2 levels, and the last option discusses insufficient oxygen, which is a separate issue related to a different condition known as hypoxemia. Thus, understanding hypercapnia's precise definition reinforces its clinical significance in anesthesia and respiratory care.