What does it indicate if the pupils return to normal after a craniotomy?

Under normal circumstances, if the pupils recover after craniotomy, it usually indicates that the patient's central nervous system is functioning properly. If any physical discomfort occurs, prompt medical attention is recommended. The detailed analysis is as follows:

Craniotomy is a surgical procedure involving opening the skull, typically performed to treat intracranial conditions such as brain tumors, cerebral hemorrhage, or cerebral palsy. The pupil, located in the iris of the eye, contains the pupillary sphincter muscle and dilator muscle, which control pupil constriction and dilation respectively, regulating the amount of light entering the eye. During craniotomy, abnormal pupil responses—such as pupil dilation or constriction—often suggest potential issues like increased intracranial pressure or other central nervous system complications. Therefore, recovery of pupil response after craniotomy generally indicates that intracranial pressure has been controlled and the patient's neurological condition has stabilized, representing a positive sign of central nervous system functional recovery. Hence, pupil recovery after craniotomy usually suggests normal function of the central nervous system.

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