A nurse is suctioning a patient on a mechanical ventilator. Before suctioning, the nurse hyper-oxygenates the patient because this


•Suctioning the patient's endotracheal (ET) tube lowers the partial pressure of arterial oxygen, which can cause a cardiac arrhythmia, such as bradycardia.

•Hyper-oxygenating for 30-60 seconds with 100% oxygen helps prevent arrhythmias and oxygen desaturation.

•The remaining answer choices are not associated with suctioning.

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