scholarly journals A unique method for estimating the reliability learning curve of optic nerve sheath diameter ultrasound measurement

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
Frederick A. Zeiler ◽  
Markus T. Ziesmann ◽  
Patrick Goeres ◽  
Bertram Unger ◽  
Jason Park ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Learning Curve ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Ultrasound Measurement ◽  
Nerve Sheath ◽  
Unique Method

scholarly journals How accurate is ultrasound of the optic nerve sheath diameter performed by inexperienced operators to exclude raised intracranial pressure?

2015 ◽  
Vol 19 (1) ◽  
Author(s):  
G. J. Du Toit ◽  
D. Hurter ◽  
M. Nel
Keyword(s):  
Optic Nerve ◽  
Intracranial Pressure ◽  
Lumbar Puncture ◽  
Predictive Value ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Ultrasound Measurement ◽  
Raised Intracranial Pressure ◽  
Cross Sectional ◽  
Nerve Sheath

Background: It has been well documented that ultrasound measurement of the optic nerve sheath diameter performed by an experienced operator shows good correlation with raised intracranial pressure, irrespective of the cause. Objective: To establish the accuracy of this technique performed by inexperienced operators.Method: A prospective analytical cross-sectional study was conducted. All patients ≥18 years of age who presented at our medical casualty and emergency departments with suspected meningitis were enrolled in the study. All patients were evaluated with the use of optic nerve sheath diameter ultrasound with or without computed tomography brain scan prior to lumbar puncture. Lumbar puncture opening pressure measurements were compared with the ultrasound measurements.Results: A total of 73 patients were enrolled in the study, of whom 14 had raised intracranial pressure. The study had a sensitivity of 50% (95% confidence interval (CI) 26.8%–73.2%) and specificity of 89.8% (95% CI 79.5%–95.3%) with a positive predictive value of 54.8% (95% CI 29.1%–76.8%) and negative predictive value of 88.3% (95% CI 77.8%–94.2%). The likelihood ratio of a positive test was 4.92 (95% CI 1.95–11.89) and that of a negative test 0.56 (95% CI 0.29–0.83). Cohen’s kappa value was 0.41 which indicates a moderate agreement. The receiver operating characteristic (ROC) curve had an area under the curve (AUC) of 0.73 (95% CI 0.51–0.95). Conclusion: Ultrasound measurement of the optic nerve sheath diameter can be used to exclude raised intracranial pressure, even in the hands of inexperienced operators.

The relationship between transorbital ultrasound measurement of the optic nerve sheath diameter (ONSD) and invasively measured ICP in children

2016 ◽  
Vol 32 (10) ◽  
pp. 1769-1778 ◽  
Author(s):  
Llewellyn C. Padayachy ◽  
Vaishali Padayachy ◽  
Ushma Galal ◽  
Rebecca Gray ◽  
A. Graham Fieggen
Keyword(s):  
Optic Nerve ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Ultrasound Measurement ◽  
Nerve Sheath ◽  
The Relationship

The relationship between transorbital ultrasound measurement of the optic nerve sheath diameter (ONSD) and invasively measured ICP in children.

2016 ◽  
Vol 32 (10) ◽  
pp. 1779-1785 ◽  
Author(s):  
Llewellyn C. Padayachy ◽  
Vaishali Padayachy ◽  
Ushma Galal ◽  
Travis Pollock ◽  
A. Graham Fieggen
Keyword(s):  
Optic Nerve ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Ultrasound Measurement ◽  
Nerve Sheath ◽  
The Relationship

scholarly journals Inter-rater reliability of optic nerve sheath diameter measurement using real-time ultrasonography

2022 ◽  
Vol 14 (1) ◽  
Author(s):  
Jason B. Jennings ◽  
Cynthia Oliva ◽  
Michael Joyce ◽  
Michael J. Vitto ◽  
Jordan Tozer ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Real Time ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Ultrasound Measurement ◽  
Emergency Physicians ◽  
Rater Reliability ◽  
Nerve Sheath

Abstract Objectives Ultrasound measurement of the optic nerve sheath diameter (ONSD) is a rapid, non-invasive means to indirectly assess intracranial pressure. Previous research has demonstrated the ability of emergency physicians to measure ONSD accurately with bedside ultrasound when compared to CT scan or MRI, however the reliability of this measurement between two or more operators has been called into question (Hassen et al. in J Emerg Med 48:450–457, 2015; Shirodkar et al. in Ind J Crit Care Med 19:466–470, 2015). Given the need for accurate and precise measurement to use this as a screening exam, we sought to determine the inter-rater reliability between ONSD measurements obtained in real time by fellowship-trained emergency ultrasound physicians. Methods Three ultrasound fellowship-trained emergency physicians measured bilateral ONSD of 10 healthy volunteers using a high-frequency linear transducer. The physicians were blinded to the other scanners’ measurements, and no instructions were given other than to obtain the ONSD. Each sonographer measured the ONSD in real time and it was recorded by a research coordinator. All measurements were recorded in millimeters. Intraclass correlation coefficients (ICCs) were calculated to estimate the inter-rater reliability. Results A total of 60 measurements of ONSD were obtained. The average measurement was 4.3 mm (3.83–4.77). Very little variation was found between the three physicians, with a calculated ICC of 0.82 (95% confidence interval 0.63–0.92). Conclusions ONSD measurement obtained by ultrasound fellowship-trained emergency medicine physicians is a reliable measurement with a high degree of correlation between scanners.

scholarly journals Ultrasound measurement of optic nerve sheath diameter pre- and post-lumbar puncture

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Christopher K. Schott ◽  
Mohammad I. Hirzallah ◽  
Rock Heyman ◽  
Daniel N. Lesky ◽  
Emily B. Brant ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Lumbar Puncture ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Ultrasound Measurement ◽  
Nerve Sheath
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