What is the normal range for carbon dioxide (CO2) levels in the blood?

The normal range for carbon dioxide (CO2) levels in the blood is indeed 35-45 mmHg. This range reflects the partial pressure of carbon dioxide in arterial blood and is crucial for assessing respiratory function. Maintaining CO2 levels within this range is vital for regulating blood pH and ensuring that the body can effectively manage its acid-base balance.

When CO2 levels exceed this range, it can indicate conditions such as respiratory acidosis, where the body retains too much carbon dioxide, often due to inadequate ventilation. Conversely, levels below this range might suggest respiratory alkalosis, which can occur when an individual hyperventilates, effectively removing CO2 from the bloodstream faster than it is produced. Thus, understanding and monitoring CO2 levels are essential for diagnosing and managing various respiratory and metabolic disorders.