A nurse is suctioning a patient with a mechanical ventilator. Before suctioning, the nurse hyperoxygenates the patient because this:

Prevents cardiac arrhythmias


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

•Hyperoxygenating the patient with 100% oxygen for 30-60 seconds prior to suctioning helps prevent arrhythmias and oxygen desaturation during the procedure.

•The remaining answer choices are not associated with suctioning.

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