The drowning victim is admitted to the intensive care unit (ICU) after being without oxygen for 10 minutes. When he was found, he did not have a pulse and was resuscitated at the site. Once return of spontaneous circulation (ROSC) occurred, he was transported to the hospital. He was found to be profoundly hypotensive and was fluid resuscitated in the ambulance. In the ICU, his Glasgow coma score is found to be 7. He is intubated and has a central line and a peripheral arterial catheter in place. Which constellation of symptoms concern the nurse the most?

The nurse notes the patient’s electrocardiogram shows peaked T waves with a prolonged PR interval. Which lab test does the nurse expect the provider to order?

The nurse is performing an initial shift assessment of a patient with a chest tube and notes the water in the water-seal level is fluctuating. Which action by the nurse is appropriate?