Optic Nerve Sheath Diameter Measured by Point‐of‐Care Ultrasound and MRI

2020 ◽  
Vol 30 (6) ◽  
pp. 793-799
Author(s):  
Hamid Shokoohi ◽  
Matthew Pyle ◽  
Evan Kuhl ◽  
Michael A. Loesche ◽  
Aakshit Goyal ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Point Of Care ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Point Of Care Ultrasound ◽  
Nerve Sheath

scholarly journals Point-of-care ultrasound of optic nerve sheath diameter to detect intracranial pressure in neurocritically ill children - A narrative review

2020 ◽  
Vol 43 (3) ◽  
pp. 231-239 ◽  
Author(s):  
Jainn-Jim Lin ◽  
Aaron E. Chen ◽  
Elaina E. Lin ◽  
Shao-Hsuan Hsia ◽  
Ming-Chou Chiang ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Intracranial Pressure ◽  
Point Of Care ◽  
Optic Nerve Sheath Diameter ◽  
Narrative Review ◽  
Optic Nerve Sheath ◽  
Point Of Care Ultrasound ◽  
Nerve Sheath

Comparison of Three Point-of-Care Ultrasound Views and MRI Measurements for Optic Nerve Sheath Diameter: A Prospective Validity Study

2019 ◽  
Vol 33 (1) ◽  
pp. 173-181 ◽  
Author(s):  
Ronak Raval ◽  
Jay Shen ◽  
Deon Lau ◽  
Nick Ferguson ◽  
Thomas Kelly ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Point Of Care ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Validity Study ◽  
Point Of Care Ultrasound ◽  
Nerve Sheath ◽  
Mri Measurements

Abstract 334: Point-Of-Care Ultrasound in the Assessment of Optic Nerve Sheath Diameter After Out-Of-Hospital Cardiac Arrest

Circulation ◽  
2019 ◽  
Vol 140 (Suppl_2) ◽  
Author(s):  
Pavitra Kotini-Shah ◽  
Sarah E Kim ◽  
Richard Gordon ◽  
Benjamin Karfunkle ◽  
Pratik B Doshi ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Optic Nerve ◽  
Neurological Outcome ◽  
Optic Nerve Sheath Diameter ◽  
Small Sample ◽  
Optic Nerve Sheath ◽  
Point Of Care Ultrasound ◽  
Nerve Sheath ◽  
Ocular Ultrasound ◽  
Linear Probe

Introduction: Hypoxic-ischemic injury from cardiac arrest may cause cerebral edema, leading to increased intracranial pressure (ICP) and brain tissue damage. Optic nerve sheath diameter (ONSD) is associated with elevated ICP. Limited clinical studies have reported ONSD changes in the early post-resuscitation time frame. We sought to evaluate the utility of bedside ocular ultrasound measurements in the assessment of post-cardiac arrest brain injury. Methods: We studied adult out-of-hospital cardiac arrests treated at an urban academic ED and achieving return of spontaneous circulation (ROSC) between May 2018 to May 2019. We included witnessed and unwitnessed arrest as well as shockable and non-shockable rhythms. After ROSC, trained emergency physicians performed bedside ultrasonographic assessment of bilateral ONSD at 1, 6, 24, 48, and 72 hours using an ocular preset on a 15MHz linear probe. ONSD measurements at these time frames were compared between groups stratified by rhythm type and neurological outcome. Cerebral performance category (CPC) was measured at 72 hours and at discharge. Results: Out of 48 eligible patients, 15 were excluded from the study due to lack of consent or available ultrasound images. We included 33 patients, of which 11 were female and 22 were male, with a median age of 57 (IQR 20). There were 19 with an initial rhythm of asystole or pulseless electrical activity (PEA), 9 with ventricular fibrillation arrests, and 5 with an unclear rhythm. At 1 hour, patients with CPC 1-2 had smaller ONSD compared to patients with CPC 3-5 (5.5mm vs 6.1mm, p=0.03). At 72 hour, patients with CPC score of 1-2 had an average reduction in ONSD of 1.6mm verses 0.29mm increase in patients with CPC 3-5. Despite small sample size, a trend towards higher ONSD were seen in patients with non-shockable vs shockable rhythm. Females were also consistently found to have smaller ONSD measurements in all time periods compared to males. Conclusions: This is the first study in the USA to perform analysis using ONSD measurements in cardiac arrest patients. Preliminary analysis of this on-going pilot revealed a greater improvement in ONSD diameters in patients with a favorable neurological outcome. OSND may have utility in prognostication of the post-arrest state.

Automatic Optic Nerve Sheath Measurement in Point-of-Care Ultrasound

2020 ◽  
pp. 23-32
Author(s):  
Brad T. Moore ◽  
Sean P. Montgomery ◽  
Marc Niethammer ◽  
Hastings Greer ◽  
Stephen R. Aylward
Keyword(s):  
Optic Nerve ◽  
Point Of Care ◽  
Optic Nerve Sheath ◽  
Point Of Care Ultrasound ◽  
Nerve Sheath

scholarly journals Is Ocular Sonography a Reliable Method for the Assessment of Elevated İntracranial Pressure in Children?

2020 ◽  
Author(s):  
Dincer Yildizdas ◽  
Nagehan Aslan
Keyword(s):  
Intensive Care ◽  
Optic Nerve ◽  
Intracranial Pressure ◽  
Point Of Care ◽  
Optic Nerve Sheath Diameter ◽  
Point Of Care Ultrasound ◽  
Raised Intracranial Pressure ◽  
Nerve Sheath ◽  
Retinal Artery ◽  
Doppler Indices

AbstractPoint-of-care ultrasound has been widely used by clinicians at the bedside in recent years. Various types of point-of-care ultrasound practices are employed, especially in pediatric emergency rooms and intensive care units. Pediatric intensive care specialists perform point-of-care ultrasound virtually as a part of physical examination since it provides just-in-time vital clinical information, which could assist in acute management strategies in critically ill patients. Measurement of optic nerve sheath diameter using point-of-care ultrasound is a noninvasive and radiation-free technique to determine raised intracranial pressure. Ophthalmic artery and central retinal artery Doppler indices can be used as transcranial Doppler to assess raised intracranial pressure. The aim of this review was to provide detailed information on ultrasonographic measurements of optic nerve sheath diameter and central retinal artery Doppler indices as techniques of interest for predicting increased intracranial pressure in pediatric patients in view of the literature.

scholarly journals A New Inexpensive Simulation Model for Ultrasound Assessment of Optic Nerve Sheath Diameter

2020 ◽  
Vol 47 (4) ◽  
pp. 543-548
Author(s):  
Garrett G. R. J. Johnson ◽  
Tomislav Jelic ◽  
Angela Derksen ◽  
Bertram Unger ◽  
Frederick Zeiler ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Point Of Care ◽  
Cost Model ◽  
Low Cost ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Diagnostic Modality ◽  
Nerve Sheath ◽  
Ultrasound Assessment

ABSTRACT:Background:Sonographic measurement of optic nerve sheath diameter (ONSD) is becoming increasingly accepted as a diagnostic modality to detect elevations in intracranial pressure. As this technique becomes more widespread, methods to address the inherent operator-dependent nature of this modality will need to be developed. We propose a novel low-cost model to accurately simulate sonographic ONSD measurement for purposes of training and assessment.Methods:We designed models composed of medical tubing of various diameters readily available from typical hospital supplies and suspended them in gelatin. The models were evaluated by ultrasound by three expert point-of-care sonographers using a standard linear array probe and technique proposed in the literature.Results:This model generates faithful simulation of the ONS that closely approximates in vivo images and can be used to produce accurate, reproducible measurements. Materials are low cost and easy to acquire and assemble.Conclusions:Our model provides realistic simulated images of the ONS. Through comparison of sonographic measurements to the known tube diameters, this model serves as a promising inexpensive tool to teach the method of ultrasound assessment of ONSD or as a way to determine accuracy of this novel ultrasound technology.

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