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Volume 2022, Issue 2
  • ISSN: 1999-7086
  • EISSN: 1999-7094

Abstract

Bedside optic nerve sheath diameter (ONSD) measurement is increasingly being used to monitor raised intracranial pressure (ICP) in patients coming to an emergency department. This study aims to measure the accuracy of optic nerve sheath diameter (ONSD) measurement by ultrasound as a non-invasive method for early detection of raised intracranial pressure (ICP) in patients with non-traumatic emergencies presenting in emergency department settings, in comparison to CT/MRI brain scan findings of raised ICP. A total of 100 patients with non-traumatic emergencies suspected of raised ICP were seen in the emergency department. Bedside ONSD measurement was done within one hour of arrival. Patients underwent a CT/MRI brain scan within one hour of the ONSD in search of raised ICP. MS Excel spreadsheet was used for coding, SPSS v23 for data analysis, independent sample ‘t-test for group comparison, Wilcoxon test for non-normally distributed data, Chi-square test for group comparison for categorical data, Fischer's exact test for frequency <  5 and 25 % of the cells, Pearson's and Spearman's correlation for linear correlation and statistical significance were kept at p <  0.05. Using a cut-off ONSD value (mm) of 6.3 mm, this study found a sensitivity of 100%, specificity of 89.2%, PPV of 83.3%, NPV of 100%, and diagnostic accuracy of 93% for detection of raised ICP by bedside USG ONSD measurement compared to CT/MRI brain. The study shows that bedside ONSD measurement is a useful and acceptably reliable technique for detecting raised ICP of emergency department patients with non-traumatic emergencies and raised ICP.

© 2022 Akhtar, Goud, Mishra, Reddy, Argey, licensee HBKU Press.
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2022-01-24
2024-11-15
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/content/journals/10.5339/jemtac.2022.11
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Ocular Ultrasound to detect raised intracranial pressure in non-traumatic emergencies in Emergency Department
Journal of Emergency Medicine, Trauma and Acute Care 2022, 11 (2022); https://doi.org/10.5339/jemtac.2022.11
/content/journals/10.5339/jemtac.2022.11
/content/journals/10.5339/jemtac.2022.11
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Keyword(s): intracranial pressure, MRI, non-traumatic, ONSD, optic nerve sheath and ultrasound

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