What is indicated if a capnography reading is less than 35mmHg?

A capnography reading of less than 35 mmHg indicates hyperventilation. In healthy individuals, the normal range for end-tidal carbon dioxide (ETCO2) is typically between 35 and 45 mmHg. When the reading drops below 35 mmHg, it suggests that the respiratory rate or depth of breaths is excessive, leading to an increased elimination of carbon dioxide (CO2) from the body. This decreased level of CO2 occurs due to rapid and shallow breathing or other forms of over-breathing, causing respiratory alkalosis. Understanding this relationship helps healthcare providers monitor patient ventilation status accurately and make informed decisions during procedures requiring moderate sedation.

Capnography is a vital tool in patient monitoring during sedation, as it provides real-time feedback on the effectiveness of ventilation. When a capnography reading indicates values below the normal threshold, it prompts further evaluation of the patient’s respiratory pattern and may necessitate interventions to stabilize the patient’s ventilation.