Relationship between intracranial pressure as measured by an epidural intracranial pressure monitoring system and optic nerve sheath diameter in healthy dogs.

Objective: To evaluate the association between ultrasonographically measured optic nerve sheath diameter (ONSD) and acute increases in intracranial pressure (ICP) as measured by an epidural intracranial pressure monitoring system (EICPMS) in healthy dogs.

Animals: 6 young healthy dogs.

Procedures: An EICPMS connected to a pressure monitor was used to generate a continuous pressure waveform in each anesthetized dog.