Which information about a patient who is hospitalized after a traumatic brain injury requires the most rapid action by the nurse?
a. Intracranial pressure of 15 mm Hg
b. Cerebrospinal fluid (CSF) drainage of 15 mL/hour
c. Pressure of oxygen in brain tissue (PbtO2) is 14 mm Hg
d. Cardiac monitor shows sinus tachycardia, with a heart rate of 126 beats/min