What does it mean when a ventilator oxygen sensor is depleted?

Dec 10, 2025 Source: Cainiu Health

Dr. Ren Yi

Introduction

Oxygen sensor depletion in a ventilator refers to the failure of the oxygen sensor due to prolonged use, aging, or malfunction, resulting in loss of its ability to accurately detect oxygen concentration and thus rendering it inoperative. Once sensor depletion is detected, professional personnel should be contacted immediately for replacement; disassembly or adjustment by untrained individuals is strictly prohibited. During daily use of the ventilator, keep the sensor dry and clean, and avoid contamination from liquids or secretions.

Oxygen sensor depletion in ventilators refers to the failure of the oxygen sensor within the ventilator due to prolonged use, aging, or malfunction, resulting in the loss of its ability to accurately detect oxygen concentration and thus rendering it non-functional. A detailed explanation is as follows:

"Oxygen sensor depletion in ventilators" means that the core component responsible for monitoring the oxygen concentration in the output gas has lost its precision in detecting oxygen levels due to long-term use, aging, or frequent exposure to humid environments. This sensor is crucial for ensuring safe oxygen delivery, as it provides real-time feedback on whether the oxygen concentration meets the patient's needs. Once depleted, the ventilator can no longer accurately display oxygen levels, potentially leading to insufficient or excessive oxygen supply, compromising treatment efficacy and even posing clinical risks. Therefore, timely intervention is necessary.

Upon detecting sensor depletion, professional personnel should be contacted immediately for replacement; users must not attempt to disassemble or adjust the device themselves. During daily use, keep the sensor dry and clean, avoiding contamination from liquids or secretions. Regularly calibrate and maintain the sensor according to the manufacturer’s instructions, track cumulative usage time, and prepare for timely replacement. Pay close attention to ventilator alarm messages during operation; if abnormal oxygen concentration readings occur, discontinue use immediately and seek professional assistance.

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