What is the normal PaCO2 range?

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Prepare for the AACN Essentials of Critical Care Nursing Test. Study with multiple choice questions and thorough explanations. Ace your test effortlessly!

Multiple Choice

What is the normal PaCO2 range?

Explanation:
PaCO2 is a measure of how well someone is ventilating; it reflects the balance of carbon dioxide production and alveolar ventilation. The normal arterial CO2 partial pressure is about 35 to 45 mmHg. When PaCO2 falls within this range, ventilation is typically adequate and acid-base status is stable. Values lower than 35 indicate hyperventilation (hypocapnia), which can cause respiratory alkalosis, while values higher than 45 indicate hypoventilation (hypercapnia), which can cause respiratory acidosis. Among the options, 35-45 mmHg is the range that lies within the normal window. The other ranges are either below or above normal, indicating abnormal ventilation.

PaCO2 is a measure of how well someone is ventilating; it reflects the balance of carbon dioxide production and alveolar ventilation. The normal arterial CO2 partial pressure is about 35 to 45 mmHg. When PaCO2 falls within this range, ventilation is typically adequate and acid-base status is stable. Values lower than 35 indicate hyperventilation (hypocapnia), which can cause respiratory alkalosis, while values higher than 45 indicate hypoventilation (hypercapnia), which can cause respiratory acidosis. Among the options, 35-45 mmHg is the range that lies within the normal window. The other ranges are either below or above normal, indicating abnormal ventilation.

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