@article{Ghimire_Chand_Mahat_Ojha_Singh_2019, title={Intra and Interobserver Variability in the B-mode Transorbital Sonographic Measurement of the Optic Nerve Sheath Diameter in Healthy Nepalese Individuals}, volume={9}, url={https://www.nepjol.info/index.php/NJR/article/view/24811}, DOI={10.3126/njr.v9i1.24811}, abstractNote={<p><strong>Introduction:</strong> Ocular ultrasound has gained importance as a non-invasive imaging technique in the screening, diagnosis and treatment management of intracranial hypertension. The aim of our study was to estimate the intra and interobserver variability on B-mode ocular ultrasound measurement of optic nerve sheath diameter (ONSD).</p> <p><strong>Methods:</strong> ONSD of the right eye was measured by ultrasound examination among 120 healthy adult volunteers. The ONSD was assessed 3 mm behind the globe and two serial measurements were taken by two observers who were blinded to each other’s findings.</p> <p><strong>Results:</strong> Age of the volunteers ranged from 18 to 27 years with a mean age of 23.07 +/- SD of 2.486. The mean of ONSDs of two observers was 4.168 +/- SD of 0.54 mm. The intraclass correlation coefficient for first and second observers was 0.997 and 0.978 respectively at 95% confidence interval. The interobserver intraclass correlation coefficient was 0.977 at 95% confidence interval. No correlation of age and gender was noted with ONSD.</p> <p><strong>Conclusions:</strong> B-mode transorbital ultrasound measurement of ONSD is highly reproducible with significant intra-observer and inter-observer agreement. Ultrasound measurement of ONSD measurements can serve as indispensable tool in critical care.</p>}, number={1}, journal={Nepalese Journal of Radiology}, author={Ghimire, Prasanna and Chand, Birendra Bahadur and Mahat, Yug Bijay and Ojha, Subash and Singh, Bhuwaneshwar Prasad}, year={2019}, month={Jul.}, pages={18–23} }