Pain, Intracranial Pressure
Conditions
Keywords
stellate ganglion block
Brief summary
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.
Interventions
A thick layer of gel is applied on the upper closed eyelid. The linear 13- to 6-MHz ultrasound probe is then placed in the gel, without exerting pressure on the eye. Two measurements are taken for each optic nerve: one in the transverse plane, with the probe being horizontal, and one in the sagittal plane, with the probe being vertical. The final ONSD is the mean of these measurements.
Sponsors
Yonsei University
Study design
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
20 Years to 70 Years
Healthy volunteers
No
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
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| ultrasonographic measurement of optic nerve sheath diameter | 15 minutes |
Countries
South Korea
Outcome results
None listed