Accuracy of Optic Nerve Sheath Diameter Measurements in Pocket-Sized Ultrasound Devices in a Simulation Model

Frontiers in Medicine

article

Garrett G. R. J. Johnson¹  Tomislav Jelic²  Angela Derksen³  Bertram Unger⁴  Frederick A. Zeiler⁵  Markus T. Ziesmann¹  Lawrence M. Gillman¹ 

[1] Department of Surgery, University of Manitoba;Department of Emergency Medicine, University of Manitoba;Emergency Department, Seven Oaks General Hospital;Department of Internal Medicine, University of Manitoba;Section of Neurosurgery, Department of Surgery, University of Manitoba;Department of Anatomy and Cell Science, University of Manitoba;Biomedical Engineering, Faculty of Engineering, University of Manitoba;Centre on Aging, University of Manitoba;Division of Anaesthesia, Department of Medicine, University of Cambridge

关键词: ultrasound;    intracranial pressure;    point-of-care;    simulation;    intracranial hypertension;    optic nerve;   

DOI  :  10.3389/fmed.2022.831778

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

Introduction Transorbital sonographic measurement of optic nerve sheath diameter (ONSD) is an emerging non-invasive technique for the identification and monitoring of intracranial hypertension. In recent years, new pocket ultrasound devices have become available, and it is uncertain if they have the resolution to measure such small structures appropriately as compared to their predecessors. In this study, we measure the performance of three ultrasound units on a simulation model to establish their precision and accuracy. Methods ONSD was measured by three expert point-of-care sonographers using ultrasound machines three times on each of seven discrete ONS model sizes ranging from 3.5 to 7.9 mm. Two pocket ultrasounds (IVIZ, Sonosite, and Lumify, Philips) and one standard-sized portable ultrasound (M-Turbo, Sonosite) were used. Measurements were analyzed for mean error and variance and tested for significance using blocked covariance matrix regression analyses. Results The devices differed in their variances (Lumify: 0.19 mm 2 , M-Turbo: 0.26 mm 2 , IVIZ: 0.34 mm 2 ) and their mean error (Lumify: −0.05 mm, M-Turbo: 0.10 mm, IVIZ: −0.10 mm). The difference in mean error between users is not significant ( p = 0.45), but there is a significant difference in mean error between devices ( p = 0.02). Conclusions Accurate ONSD measurement is possible utilizing pocket-sized ultrasound, and in some cases, may be more accurate than larger portable ultrasound units. While the differences in these devices were statistically significant, all three were highly accurate, with one pocket device (Lumify) outperforming the rest. Further study in human subjects should be conducted prior to using pocket ultrasound devices for in vivo diagnosis of intracranial hypertension.

【 授权许可】

CC BY