Optic Nerve Sheath Diameter in Patients With Intracranial Pathology

Conditions

Elevated Intracranial Pressure (ICP)

Brief summary

Elevated intracranial pressure (ICP) is a common and potentially life threatening condition arising from a variety of pathological conditions. The ability to monitor ICP is a crucial aspect in the management of these patients. Currently, the diagnosis of whether ICP is elevated or not is determined either with clinical signs (headache, nausea and vomiting or visual disturbances) or from the changes in the preoperative neuroimaging modalities such as computerized tomography (CT scan) and/or magnetic resonance imaging (MRI). Recently, transorbital ultrasonography has gained popularity as a noninvasive bedside exam that has been shown to be useful in the diagnosis of raised ICP by evaluating the change in the optic nerve sheath diameter (ONSD). The aim of our study is to use transorbital ultrasound to evaluate ONSD changes in patients with intracranial pathology and to compare the changes in the ONSD before and after surgical intervention as well as between patients with and without clinical or radiological signs of increased ICP.

Detailed description

Elevated intracranial pressure (ICP) is a common and potentially life threatening condition arising from a variety of pathological conditions. The ability to monitor ICP is a crucial aspect in the management of these patients. Currently, the diagnosis of whether ICP is elevated or not is determined either with clinical signs (headache, nausea and vomiting or visual disturbances) or from the changes in the preoperative neuroimaging modalities such as computerized tomography (CT scan) and/or magnetic resonance imaging (MRI). Recently, transorbital ultrasonography has gained popularity as a noninvasive bedside exam that has been shown to be useful in the diagnosis of raised ICP by evaluating the change in the optic nerve sheath diameter (ONSD). The aim of our study is to use transorbital ultrasound to evaluate ONSD changes in patients with intracranial pathology and to compare the changes in the ONSD before and after surgical intervention as well as between patients with and without clinical or radiological signs of increased ICP.

Related papers

No related papers found yet.

Interventions

OTHEROptic Nerve Sheath Diameter using an ultrasound

Optic nerve sheath diameter will be measured by ultrasound preoperatively on the day of surgery, Immediate postoperative period (within 24 hours) or 6-8 weeks after surgery on the follow-up visit.

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

No

Inclusion criteria

* Intracranial pathology patients scheduled for elective or emergency surgery. * American Anesthesiologist Society physical status classification system (ASA) 1-4

Exclusion criteria

* history of Glaucoma, * previous retinal surgery, * optic neuritis, * lack of informed consent, * pregnancy

Design outcomes

Primary

Measure	Time frame
Optic Nerve Sheath Diameter, as measured by ultrasound of the optic nerve	6-8 weeks

Countries

Canada

Outcome results

None listed