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Valid method of indirect measurement of intracranial pressure is using optic nerve sheath diameter. Different volume of injection is known to affect the degree of increase of intracranial pressure.
This study is desinged to measure the changes of optic nerve sheath diameter and cerebral oxygenation when different volume of normal saline was injected.
Previous study showed that different volume of injections (1.0 ml/kg vs. 1.5 ml/kg) during caudal anesthesia showed siginifiant increase of optic nerve sheath diameter in group of high volumes. Increase of ICP can result in harmful effect including reduced cerebral flow and oxygen saturation. Also, increase of ICP can cause headache, syncope and transient loss of visual acuity. The proven and valid method of measuring ICP indirectly is using optic nerve sheath diameter.
This study was designed to examine the changes of optic nerve sheath diameter and cerebral oxygenation when different volume of normal saline was injected.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| injection of low volume of saline | Active Comparator | low volume (5 cc) saline injection during thoracic epidural catheterization |
|
| injection of intermediate volume of saline | Active Comparator | intermediate volume (10 cc) saline injection during thoracic epidural catheterization |
|
| injection of high volume of saline | Active Comparator | high volume (20 cc) saline injection during thoracic epidural catheterization |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| thoracic epidural catheterization | Procedure | thoracic epidural catheterization for postoperative pain control |
|
| Measure | Description | Time Frame |
|---|---|---|
| optic nerve sheath change during 4 time period | optic nerve sheath change during 4 time period using ultrasound | Baseline, 10 minutes, 20 minutes, 40 minutes after the completion of the intervention |
| Measure | Description | Time Frame |
|---|---|---|
| cerebral oxygenation change during 4 time period | cerebral oxygenation change during 4 time period using pressure monitoring kit | Baseline, 10 minutes, 20 minutes, 40 minutes after the completion of the intervention |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Ji Hee Hong, PhD | Keimyung University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hong ji HEE | Daegu | 42601 | South Korea |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 34704711 | Derived | Hong J, Kim JS, Lee YH. The Effect of Normal Saline Injection Volumes on the Optic Nerve Sheath Diameter during Thoracic Epidural Analgesia. Pain Physician. 2021 Nov;24(7):E1007-E1013. |
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