NCT05548335

Measurement of the Optic Nerve Sheath Diameter

Microconvex Probe Versus Linear Probe for Measurement of the Optic Nerve Sheath Diameter

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Cleveland Clinic Akron General · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

This study is a prospective assessment of the accuracy of ocular ultrasound as a tool to measure the diameter of the optic nerve sheath and the eyeball transverse diameter in healthy adult patients presenting to the Emergency Department and have confirmatory imaging of the optic nerve as part of their clinical care.

Detailed description

This will be a prospective evaluation of accuracy of microconvex and linear transducers for ultrasound measurements of the ONSD and the ETD. Study population will be adult patients that present to Cleveland Clinic Akron General Emergency Department between July 1, 2022 and July 31 April 1, 2023. Patients will be identified on the Emergency Medicine Department tracking board. Patients, once identified as meeting inclusion criteria will be asked to participate in this study and full written consent will be required. All participants will have identical procedures and there will be no groups.

Conditions

• Optic Nerve

Interventions

Type	Name	Description
PROCEDURE	Ocular Ultrasound	1\. Patients presenting to the emergency department and have a normal head and/or ocular computed tomography scan will be considered for inclusion in this study. Study staff will discuss the study with the patient and obtain consent. At that point, operator will perform ocular ultrasound. Procedure will start with either the linear or microconvex probe. A single-use sterile gel packet will be used to apply gel to one closed eyelid. The probe will be placed with minimal pressure on the eye. A transverse measurement of the ONSD will be taken. In this same view the maximal transverse diameter of the eyeball will also be measured. Images of the eye with ONSD and ETD measurements will be captured. Repeat until three measurements have been obtained resulting in an average ONSD and ETD for that eye. Repeat for other eye. Switch probe and repeat on both eyes.

Timeline

• Start date: 2022-10-01
• Primary completion: 2024-12-30
• Completion: 2024-12-31
• First posted: 2022-09-21
• Last updated: 2023-08-08

Locations

1 site across 1 country: United States