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Optic nerve sheath diameter

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https://www.readbyqxmd.com/read/27906948/cervical-interlaminar-epidural-injections-at-high-doses-do-not-increase-optic-nerve-sheath-diameter-on-a-long-term-basis
#1
Hyunzu Kim, Joo Hyeon O, Sung-Jun Hong, Keun Man Shin, JungChan Park, Sang Soo Kang
BACKGROUND: Cervical epidural injection (CEI) is widely performed on patients with pain originating from the cervical spine. Studies have shown a good relationship between the optic nerve sheath diameter (ONSD) and the intracranial pressure (ICP). OBJECTIVE: The aim of this study was to evaluate the changes in the ONSD as a non-invasive surrogate marker of ICP after CEI. STUDY DESIGN: Prospective observational study. SETTING: Hospital and ambulatory pain clinic...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27862614/transorbital-sonography-and-visual-outcome-for-the-diagnosis-and-monitoring-of-optic-neuritis
#2
Piergiorgio Lochner, Maurizio A Leone, Klaus Fassbender, Roberto Cantello, Lorenzo Coppo, Raffaele Nardone, Gianni Zorzi, Martin Lesmeister, Cristoforo Comi, Francesco Brigo
BACKGROUND AND PURPOSE: Transorbital sonography (TOS) is a promising tool to support the clinical diagnosis of optic neuritis (ON) by showing thickening of optic nerve. In this study, we aimed to define its specific role in follow-up of ON patients. METHODS: We measured ultrasonography parameters and visual acuity (VA) at presentation and after 1 year in 45 patients with newly diagnosed ON. Two vascular sonographers used B-mode TOS to evaluate mean optic nerve diameter (OND) and optic nerve sheath diameter (ONSD)...
November 13, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27852525/optic-nerve-sheath-diameter-measurement-a-means-of-detecting-raised-intracranial-pressure-in-adult-traumatic-and-non-traumatic-neurosurgical-patients
#3
Mohd Raffiz, Jafri M Abdullah
INTRODUCTION: Bedside ultrasound measurement of optic nerve sheath diameter (ONSD) is emerging as a non-invasive technique to evaluate and predict raised intracranial pressure (ICP). It has been shown in previous literature that ONSD measurement has good correlation with surrogate findings of raised ICP such as clinical and radiological findings suggestive of raised ICP. OBJECTIVES: The objective of the study is to find a correlation between sonographic measurements of ONSD value with ICP value measured via the gold standard invasive intracranial ICP catheter, and to find the cut-off value of ONSD measurement in predicting raised ICP, along with its sensitivity and specificity value...
September 23, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27832503/estimating-the-accuracy-of-optic-nerve-sheath-diameter-measurement-using-a-pocket-sized-handheld-ultrasound-on-a-simulation-model
#4
Garrett G R J Johnson, Frederick A Zeiler, Bertram Unger, Gregory Hansen, Dimitrios Karakitsos, Lawrence M Gillman
BACKGROUND: Ultrasound measurement of optic nerve sheath diameter (ONSD) appears to be a promising, rapid, non-invasive bedside tool for identification of elevated intra-cranial pressure. With improvements in ultrasound technology, machines are becoming smaller; however, it is unclear if these ultra-portable handheld units have the resolution to make these measurements precisely. In this study, we estimate the accuracy of ONSD measurement in a pocket-sized ultrasound unit. METHODS: Utilizing a locally developed, previously validated model of the eye, ONSD was measured by two expert observers, three times with two machines and on five models with different optic nerve sheath sizes...
December 2016: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/27826646/diagnostic-value-of-neuro-ophthalmological-signs-in-cases-of-chiari-i-malformation
#5
Inessa Bekerman, Tal Sigal, Itzhak Kimiagar, Zina Evy Almer, Michael Vaiman
INTRODUCTION: Our purpose was to evaluate the diagnostic value of measuring diameters of optic nerve sheath (ONSD), presence/absence of papilledema, tortuosity of the optic nerve, flattening of the posterior sclera, and intraocular protrusion of the prelaminar optic nerve for intracranial pressure assessment in cases of Chiari I malformation. METHODS: In a retrospective study, MRI data of 37 consecutive pediatric patients with Chiari malformation and data of 400 patients without intracranial pathology were compared and analyzed...
December 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/27776491/the-incidence-of-increased-icp-in-icu-patients-with-non-traumatic-coma-as-diagnosed-by-onsd-and-ct-a-prospective-cohort-study
#6
Nawal Salahuddin, Alaa Mohamed, Nadia Alharbi, Hamad Ansari, Khaled J Zaza, Qussay Marashly, Iqbal Hussain, Othman Solaiman, Torbjorn V Wetterberg, Khalid Maghrabi
BACKGROUND: Unexplained coma after critical illness can be multifactorial. We evaluated the diagnostic ability of bedside Optic Nerve Sheath Diameter [ONSD] as a screening test for non-traumatic radiographic cerebral edema. METHODS: In a prospective study, mixed medical-surgical intensive care units [ICU] patients with non-traumatic coma [GCS < 9] underwent bedside ultrasonographic ONSD measurements. Non-traumatic radiographic cerebral edema [NTRCE] was defined as > 5 mm midline shift, cisternal, sulcal effacement, or hydrocephalus on CT...
October 25, 2016: BMC Anesthesiology
https://www.readbyqxmd.com/read/27761045/ultrasonographic-optic-nerve-sheath-diameter-measurement-in-overweight-parturient-with-intracranial-tumour-guiding-choice-of-anaesthesia
#7
Rameez Riaz, Sandeep Khuba, Rafat Shamim, Abinash Patro
No abstract text is available yet for this article.
October 2016: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/27741121/optic-nerve-sheath-diameter-threshold-by-ocular-ultrasonography-for-detection-of-increased-intracranial-pressure-in-korean-adult-patients-with-brain-lesions
#8
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)
https://www.readbyqxmd.com/read/27717720/the-quantitative-evaluation-of-intracranial-pressure-by-optic-nerve-sheath-diameter-eye-diameter-computed-tomographic-measurement
#9
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
https://www.readbyqxmd.com/read/27686439/-the-correlation-between-optic-nerve-sheath-diameter-and-volume-status-in-patients-after-cardiac-surgery
#10
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]
https://www.readbyqxmd.com/read/27671180/optic-nerve-sheath-diameter-on-sonography-in-idiopathic-intracranial-hypertension-versus-normal
#11
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
https://www.readbyqxmd.com/read/27660613/multiparametric-magnetic-resonance-investigation-of-brain-adaptations-to-6-days-at-4350-m
#12
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
https://www.readbyqxmd.com/read/27659820/the-relationship-between-transorbital-ultrasound-measurement-of-the-optic-nerve-sheath-diameter-onsd-and-invasively-measured-icp-in-children-part-ii-age-related-onsd-cut-off-values-and-patency-of-the-anterior-fontanelle
#13
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
https://www.readbyqxmd.com/read/27659819/the-relationship-between-transorbital-ultrasound-measurement-of-the-optic-nerve-sheath-diameter-onsd-and-invasively-measured-icp-in-children-part-i-repeatability-observer-variability-and-general-analysis
#14
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
https://www.readbyqxmd.com/read/27639433/transbulbar-b-mode-sonography-in-multiple-sclerosis-clinical-and-biological-relevance
#15
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...
December 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/27625716/optic-nerve-sheath-diameter-measurement-during-diabetic-ketoacidosis-a-pilot-study
#16
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
https://www.readbyqxmd.com/read/27612672/noninvasive-assessment-of-the-intracranial-pressure-in-non-traumatic-intracranial-hemorrhage
#17
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
https://www.readbyqxmd.com/read/27585209/update-on-the-evaluation-of-pediatric-idiopathic-intracranial-hypertension
#18
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
https://www.readbyqxmd.com/read/27579527/oxidative-stress-response-to-acute-hypobaric-hypoxia-and-its-association-with-indirect-measurement-of-increased-intracranial-pressure-a-field-study
#19
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
https://www.readbyqxmd.com/read/27545668/sonographic-changes-in-optic-nerve-sheath-diameter-associated-with-supra-versus-infrarenal-aortic-aneurysm-repair
#20
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
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