ArticleEuropean journal of anaesthesiology and intensive care2025
Learning and reproducibility of ultrasonographic assessment of the optic nerve sheath diameter: A cohort study.
Article in European journal of anaesthesiology and intensive care, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Deep learning based optic nerve sheath diameter characterization and structure quantification on transorbital ultrasound images.Frontiers in medicine · 2025Article
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Authors and funding
3 authors.
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Abstract
backgroundUltrasound-guided measurement of the optic nerve sheath diameter (ONSD) is correlated with increased intracranial pressure (ICP). It has also been recognised as being useful in predicting intracranial hypertension, monitoring ICP and predicting outcome after resuscitation. The method has been described as easy to learn and with good inter-examiner reliability. But most studies were performed with only a few experienced examiners.
objectivesThis study aimed to evaluate the learning progression and inter-examiner variability in point-of-care ultrasonographic assessment of the ONSD.
designAn observational cohort study.
settingSingle tertiary centre in north-western Germany. PATIENTS AND
participantsFor the first part, we recruited a total of nine individuals naive to the ONSD measurement method. These were divided into two groups, one with and one without previous ultrasound experience. These individuals served as both examiners and 'volunteers' for each other during the learning phase of ONSD measurements. For the second part, two intubated and sedated intensive care patients had their ONSD measured by some of these newly trained examiners plus other more experienced examiners.
interventionThe examination was introduced following the Cognitive Apprenticeship method.
main outcome measureLearning progress was evaluated by time needed to perform the examination and by the decrease in the difference of the examination results to the mean ONSD of each individual. For the second part, examination results of the intensive care patients were used to calculate an interclass correlation coefficient.
resultsThe mean examination time decreased from 79 ± 48 to 48 ± 14 s from the first to the eight measurement, nearly following an exponential manner (
conclusionAccording to our findings, the ultrasonographic assessment of the ONSD is easy to learn and expertise is gained quickly, especially for individuals with previous ultrasound experience. The data show good inter-examiner reliability on everyday patients.
trial registrationEthics Committee of the Medical Board of the State Bremen (No. 809/4).
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