The unconscious patient with elevated intracranial pressure secondary to an ischemic stroke has a jugular bulb catheter in place to monitor cerebral oxygenation (SJO₂). The patient’s oxygen saturation (read by peripheral pulse oximetry probe) is 98% on 30% FiO₂ administered via endotracheal tube. The SJO₂ is 85%. How does the nurse interpret these results?

The 50-year-old previously healthy patient complains of shortness of breath, especially on exertion or when laying down to sleep. She takes over-the-counter allergy medicine for seasonal allergies and melatonin to help her sleep sometimes. Her vital signs are heart rate of 64 bpm, respirations 22, oxygen saturation 99%, and blood pressure 114/68 mmHg. Her assessment is notable for crackles over the bilateral lung bases and a moderate diastolic apical murmur. Her electrocardiogram is normal. Her echocardiogram shows normal function of the left ventricle and severe stenosis of the mitral valve. The nurse provides which information to the patient?  

The nurse in the intensive care unit (ICU) hears repeated low pressure alarms from the ventilator of the intubated patient and suspects which condition?