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When oxygen is being delivered, the goal is a steady, comfortable breathing pattern so the lungs consistently receive the drawn oxygen. The device provides a fixed flow, and the amount of oxygen you inhale depends on your breathing. If you hold your breath, you interrupt the cycle and momentarily reduce oxygen delivery. If you take rapid, shallow breaths, ventilation becomes less efficient and you may not use the available oxygen as effectively. Breathing in a calm, normal rhythm—breathe deeply and normally—helps oxygen mix with the inhaled air and reach the alveoli reliably, maintaining the intended oxygenation. Holding breath or rapid shallow breathing can compromise oxygen delivery and gas exchange. If you feel discomfort, adjust the device as needed rather than changing your breathing pattern.