What is the expected pH level in cases of respiratory acidosis?

In cases of respiratory acidosis, the expected pH level is low. This condition arises when the lungs are unable to remove sufficient carbon dioxide (CO2) from the body, leading to an accumulation of CO2 in the blood. The increased CO2 reacts with water to form carbonic acid, which subsequently dissociates into hydrogen ions and bicarbonate. This reaction increases the concentration of hydrogen ions in the blood, resulting in a decrease in the pH level and creating a more acidic environment.

In summary, respiratory acidosis is characterized by a decreased pH, reflecting the acidosis resulting from the respiratory system's impaired ability to excrete CO2 effectively. Understanding this concept is crucial for interpreting arterial blood gas results and managing patients who may be experiencing respiratory disturbances.