The Effect of Stellate Ganglion Block on Intracranial Pressure Predicted by Ultrasonographic Assessment of Optic Nerve Sheath Diameter

The stellate ganglion block increase cerebral blood flow, as the consequence of that, it has the potential to cause an increase of intracranial pressure (ICP). Previous studies have proposed that ultrasonographic measurements of the optic nerve sheath diameter (ONSD) correlate with signs of increased ICP. Therefore, this study is aim to confirm the increased ICP by ultrasonographic measurement of ONSD after the stellate ganglion block.

Inclusion Criteria:

• Adult patients (20-70 years of age)
• who were scheduled to receive stellate ganglion block at our pain management clinic

Exclusion Criteria:

• Patients with previous history of neurologic disease, carotid disease, transient ischemic attack, ocular disease and ocular surgery
• Patients with coagulation disorder
• Patients with severe obesity
• Patients with severe cardiovascular or pulmonary disease
• Patients with cognitive deficits or psychiatric illness