You are called to a long-term care facility for a patient with altered mental status and a fever. The staff reports that the patient has an indwelling catheter and he has been passing dark colored urine. He is hypotensive with an SpO2 saturation of 87 percent. You should suspect:
Select one:
A. a severe spinal infection.
B. a contaminated ostomy bag
C. a blocked intraventricular shunt.
D. life-threatening sepsis.