After assessing an intubated patient with hypocarbia, which finding should be reported to the health care provider immediately?

• A. Reactive pupils
• B. Reactive, equal pupils
• C. Nonreactive, dilated pupils
• D. Unequal reactive pupils

Answer: (C)

The key idea here is that pupil reactivity reflects brainstem function and intracranial status. When an intubated patient who has low CO2 levels suddenly has pupils that are nonreactive and dilated, it signals a potential catastrophic rise in intracranial pressure or brain herniation. That combination—fixed (nonreactive) and dilated pupils—means the brainstem is not responding normally and urgent assessment and intervention are required. Normal or reactive pupils indicate preserved brain function and are less urgent; reactive pupils can be equal or unequal, but they do not carry the same immediate danger as fixed, dilated pupils. In this scenario, reporting the nonreactive, dilated pupils right away is essential to protect the patient and guide rapid management.