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Optic nerve sheath diameter

Rameez Riaz, Sandeep Khuba, Rafat Shamim, Abinash Patro
No abstract text is available yet for this article.
October 2016: Indian Journal of Anaesthesia
Si Un Lee, Jin Pyeong Jeon, Hannah Lee, Jung Ho Han, Mingu Seo, Hyoung Soo Byoun, Won-Sang Cho, Ho Geol Ryu, Hyun-Seung Kang, Jeong Eun Kim, Heung Cheol Kim, Kyung-Sool Jang
Optic nerve sheath diameter (ONSD) seen on ocular US has been associated with increased intracranial pressure (IICP). However, most studies have analyzed normal range of ONSD and its optimal cut-off point for IICP in Caucasian populations. Considering ONSD differences according to ethnicity, previous results may not accurately reflect the association between IICP and ONSD in Koreans. Therefore, we conducted this study to investigate normal range of ONSD and its optimal threshold for detecting IICP in Korean patients...
October 2016: Medicine (Baltimore)
Inessa Bekerman, Tal Sigal, Itzhak Kimiagar, Anna Ben Ely, Michael Vaiman
BACKGROUND: The changes of the optic nerve sheath diameter (ONSD) have been used to assess changes of the intracranial pressure for 20 years. The aim of this research was to further quantify the technique of measuring the ONSD for this purpose. METHODS: Retrospective study of computed tomographic (CT) data of 1766 adult patients with intracranial hypotension (n=134) or hypertension (n=1632) were analyzed. The eyeball transverse diameter (ETD) and ONSD were obtained bilaterally, and the ONSD/ETD ratio was calculated...
August 26, 2016: American Journal of Emergency Medicine
H Chen, X T Wang, X Ding, H M Zhang, H Zhao, Y G Chao, W He, D W Liu
Objective: To investigate the relationship between optic nerve sheath diameter (ONSD) and volume status of patients after cardiac surgery. Methods: A total of consecutive 56 patients who were treated in Critical Care Unit in Peking Union Medical College Hospital after open heart surgery from January to August 2015 were screened in this study. Central venous pressure (CVP) and 72 h net fluid balance were monitored. ONSD and diameter of inferior vena cava (IVC) were measured by ultrasound. Results: A total of 44 patients were finally included in the study...
October 1, 2016: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
Hina Rehman, Muhammad Saim Khan, Muhammad Nafees, Attique Ur Rehman, Asad Habib
OBJECTIVE: To compare the mean optic nerve sheath diameter (ONSD) in patients with idiopathic intracranial hypertension (IIH) versus normal healthy individuals using B-scan ultrasonography as diagnostic tool. STUDY DESIGN: Cross-sectional analytical study. PLACE AND DURATION OF STUDY: Armed Forces Institute of Radiology and Imaging, Rawalpindi, Pakistan, from June to December 2015. METHODOLOGY: Participants aged 30 - 50 years were divided into two groups...
September 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
Samuel Verges, Thomas Rupp, Marjorie Villien, Laurent Lamalle, Irène Troprés, Camille Poquet, Jan M Warnking, François Estève, Pierre Bouzat, Alexandre Krainik
OBJECTIVE: Hypoxic exposure in healthy subjects can induce acute mountain sickness including headache, lethargy, cerebral dysfunction, and substantial cerebral structural alterations which, in worst case, can lead to potentially fatal high altitude cerebral edema. Within this context, the relationships between high altitude-induced cerebral edema, changes in cerebral perfusion, increased brain parenchyma volume, increased intracranial pressure, and symptoms remain unclear. METHODS: In 11 subjects before and after 6 days at 4350 m, we performed multiparametric magnetic resonance investigations including anatomical, apparent diffusion coefficient and arterial spin labeling sequences...
2016: Frontiers in Physiology
Llewellyn C Padayachy, Vaishali Padayachy, Ushma Galal, Travis Pollock, A Graham Fieggen
PURPOSE: To analyse the diagnostic accuracy of age-related optic nerve sheath diameter (ONSD) cut-off values in children for detecting raised intracranial pressure (ICP) and to assess the benefit of using patency of the anterior fontanelle in describing a different set of cut-off values. METHODS: The ONSD measurement was performed prior to invasive ICP measurement in children under general anesthesia. The diagnostic accuracy of the ONSD measurement was compared to ICP at thresholds of 20, 15, 10, and 5 mmHg...
October 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Llewellyn C Padayachy, Vaishali Padayachy, Ushma Galal, Rebecca Gray, A Graham Fieggen
PURPOSE: The aim of this study was to investigate the relationship between optic nerve sheath diameter (ONSD) measurement and invasively measured intracranial pressure (ICP) in children. METHODS: ONSD measurement was performed prior to invasive measurement of ICP. The mean binocular ONSD measurement was compared to the ICP reading. Physiological variables including systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), pulse rate, temperature, respiratory rate and end tidal carbon dioxide (ETCO2) level were recorded at the time of ONSD measurement...
October 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Roberto De Masi, Stefania Orlando, Aldo Conte, Sergio Pasca, Rocco Scarpello, Pantaleo Spagnolo, Antonella Muscella, Antonella De Donno
Optic nerve sheath diameter quantification by transbulbar B-mode sonography is a recently validated technique, but its clinical relevance in relapse-free multiple sclerosis patients remains unexplored. In an open-label, comparative, cross-sectional study, we aimed to assess possible differences between patients and healthy controls in terms of optic nerve sheath diameter and its correlation with clinical/paraclinical parameters in this disease. Sixty unselected relapse-free patients and 35 matched healthy controls underwent transbulbar B-mode sonography...
September 14, 2016: Ultrasound in Medicine & Biology
Kelly R Bergmann, Donna M Milner, Constantinos Voulgaropoulos, Gretchen J Cutler, Anupam B Kharbanda
No abstract text is available yet for this article.
September 2016: Western Journal of Emergency Medicine
Michael Vaiman, Tal Sigal, Itzhak Kimiagar, Inessa Bekerman
The article describes the modified technique of measuring the diameters of the optic nerve sheath (ONSD) for assessment of the intracranial pressure (ICP) in patients with intracerebral or subarachnoid hemorrhage (SAH). The CT scans of 443 patients were analyzed retrospectively. The ONSDs were measured at 3mm behind the globe and at the point where the ophthalmic artery crosses the optic nerve. The ONSD/eyeball transverse diameter (ETD) ratio was calculated. The correlation analysis was performed with the Glasgow Coma Scale score, Hemispheric Stroke Scale score, Glasgow Outcome Score, and invasive ICP readings...
September 6, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Aubrey L Gilbert, Gena Heidary
PURPOSE OF REVIEW: Papilledema associated with idiopathic intracranial hypertension (IIH) may result in irreversible, progressive visual loss. The development of tools for the evaluation of pediatric patients with IIH is particularly relevant as many patients may not be able to comply with the detailed clinical evaluation utilized in adults for the treatment and management of this disease. The purpose of this review is to summarize relevant articles on the diagnostic tools used in evaluation and management of pediatric IIH...
November 2016: Current Opinion in Ophthalmology
Giacomo Strapazzon, Sandro Malacrida, Alessandra Vezzoli, Tomas Dal Cappello, Marika Falla, Piergiorgio Lochner, Sarah Moretti, Emily Procter, Hermann Brugger, Simona Mrakic-Sposta
High altitude is the most intriguing natural laboratory to study human physiological response to hypoxic conditions. In this study, we investigated changes in reactive oxygen species (ROS) and oxidative stress biomarkers during exposure to hypobaric hypoxia in 16 lowlanders. Moreover, we looked at the potential relationship between ROS related cellular damage and optic nerve sheath diameter (ONSD) as an indirect measurement of intracranial pressure. Baseline measurement of clinical signs and symptoms, biological samples and ultrasonography were assessed at 262 m and after passive ascent to 3830 m (9, 24 and 72 h)...
2016: Scientific Reports
Michael Ertl, Wilma Schierling, Piotr M Kasprzak, Reinhard Kopp, Corinna Brückl, Felix Schlachetzki, Karin Pfister
BACKGROUND AND PURPOSE: Quantification of changes in optic nerve sheath diameter (ONSD) using ocular sonography (OS) constitutes an elegant technique for estimating intracranial and intraspinal pressure. Aortic aneurysm repair (AAR) is associated with a reasonable risk of increased spinal fluid pressure, which is largely dependent on the extent of aneurysm repair (supra- vs. infrarenal). The aim of this study was to compare ONSD measurements in patients with suprarenal AAR (sAAR) or infrarenal AAR (iAAR)...
August 22, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
Inessa Bekerman, Tal Sigal, Itzhak Kimiagar, Michael Vaiman
Our objective was to apply the technique of measuring diameters of optic nerve sheath (ONSD) for the intracranial pressure assessment for the cases with traumatic head injury without hemorrhage. In a retrospective study, CT data of 720 adult patients were collected and analyzed. ONSDs were measured at the point where the ophthalmic artery crosses the optic nerve (anatomical landmark) together with the eyeball transverse diameter (ETD). The ONSD/ETD index was calculated. The correlation analysis was performed with gender, age, the Glasgow Coma Scale score, and the Glasgow Outcome Score...
September 15, 2016: Journal of the Neurological Sciences
Jonathan T Finnoff, Jeremiah Ray, Gianmichael Corrado, Deanna Kerkhof, John Hill
BACKGROUND: Traditionally, ultrasound has been used to evaluate musculoskeletal injuries in athletes; however, ultrasound applications extend well beyond musculoskeletal conditions, many of which are pertinent to athletes. EVIDENCE ACQUISITION: Articles were identified in PubMed using the search terms ultrasound, echocardiogram, preparticipation physical examination, glycogen, focused assessment with sonography of trauma, optic nerve, and vocal cord dysfunction...
September 2016: Sports Health
Barret Rush, Andrew Wormsbecker, Landon Berger, Katie Wiskar, Mypinder S Sekhon, Donald E Griesdale
OBJECTIVE: Optic nerve sheath diameter (ONSD) measured on a head computed tomography (CT) has been suggested as a potential prognostic factor for poor neurological outcome after cardiac arrest. We performed a single centre retrospective cohort analysis to further investigate this relationship. METHODS: All patients >18 years of age admitted to St. Paul's Hospital in Vancouver, Canada who survived a cardiac arrest and had a CT scan of the head within 48 hours were included in the analysis...
August 12, 2016: CJEM
Adam Mh Young, Mathew R Guilfoyle, Joseph Donnelly, Daniel Scoffings, Helen Fernandes, Mathew R Garnett, Shruti Agrawal, Peter J Hutchinson
INTRODUCTION: The use of clinical markers to predict intracranial pressure (ICP) is desirable as a first line measure to assist in decision making as to whether invasive monitoring is required. Correlations between ICP and Optic nerve sheath diameter (ONSD) using CT and MRI have been observed in adult populations. However data on this modality in children is less well documented. METHODS: ONSD was measured by independent observers and correlated with opening ICP at insertion of invasive monitoring probes in pediatric traumatic brain injury patients admitted to Addenbrookes Hospital between January 2009 and December 2013...
August 11, 2016: Pediatric Research
Frederick A Zeiler, Markus T Ziesmann, Patrick Goeres, Bertram Unger, Jason Park, Dimitrios Karakitsos, Michael Blaivas, Ashley Vergis, Lawrence M Gillman
BACKGROUND: Optic nerve sheath diameter (ONSD) measurement using ultrasound has been proposed as a rapid, non-invasive, point of care technique to estimate intra-cranial pressure (ICP). Ultrasonic measurement of the optic nerve sheath can be quite challenging and there is limited literature surrounding learning curves for this technique. We attempted to develop a method to estimate the reliability learning curve for ONSD measurement utilizing a unique definition of reliability: a plateau in within-subject variability with unchanged between-subject variability...
December 2016: Critical Ultrasound Journal
Gregory Hansen, Jeff K Vallance, Darcy L Beer, Ian Clark, Elizabeth A C Sellers
OBJECTIVE: Intracranial hypertension is an infrequent but serious acute complication of pediatric diabetic ketoacidosis (DKA). Subclinical elevations of intracranial pressures however, may be more common, and can be indirectly evaluated with ultrasonography of the optic nerve sheath diameter (ONSD). In this pilot study, we report serial data on ONSD trajectories from five pediatric patients with DKA to generate hypotheses for future studies. METHODS: Five pediatric patients with type 1 diabetes presented to our emergency department with DKA and enrolled in our study <3h after initiation of treatment...
November 2016: Journal of Diabetes and its Complications
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