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Optic nerve sheath diameter

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https://www.readbyqxmd.com/read/28284189/changes-in-intraocular-pressure-and-optic-nerve-sheath-diameter-in-patients-undergoing-robotic-assisted-laparoscopic-prostatectomy-in-steep-45%C3%A2-trendelenburg-position
#1
Sebastian Blecha, Marion Harth, Felix Schlachetzki, Florian Zeman, Christiane Blecha, Pierre Flora, Maximilian Burger, Stefan Denzinger, Bernhard M Graf, Horst Helbig, Michael T Pawlik
BACKGROUND: To evaluate changes in intraocular pressure (IOP) and intracerebral pressure (ICP) reflected by the optic nerve sheath diameter (ONSD) in patients undergoing robotic-assisted laparoscopic prostatectomy (RALP) in permanent 45° steep Trendelenburg position (STP). METHODS: Fifty-one patients undergoing RALP under a standardised anaesthesia. IOP was perioperatively measured in awake patients (T0) and IOP and ONSD 20 min after induction of anaesthesia (T1), after insufflation of the abdomen in supine position (T2), after 30 min in STP (T3), when controlling Santorini's plexus in STP (T4) and before awakening while supine (T5)...
March 11, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28181232/does-iih-alter-brain-microstructures-a-dti-based-approach
#2
Christoph Schmidt, Edzard Wiener, Lutz Lüdemann, Hagen Kunte, Katharina Maria Kreutz, Nils Becker, Lutz Harms, Randolf Klingebiel, Jan Hoffmann
INTRODUCTION: To investigate the correlation of microstructural parameters with CSF pressure and macroscopic changes assessed by diffusion tensor imaging (DTI) in patients with idiopathic intracranial hypertension (IIH). METHODS: Twenty-three patients with IIH as well as age-, sex-, and body mass index (BMI)-matched controls underwent high resolution MR imaging of the optic nerve sheaths (ONS), pituitary gland, and ventricles. For DTI data a voxelwise permutation analysis was performed for the whole brain and ROI analysis was performed for the optic nerve and optic radiation...
February 9, 2017: Headache
https://www.readbyqxmd.com/read/28177116/effects-of-acute-controlled-changes-in-end-tidal-carbon-dioxide-on-the-diameter-of-the-optic-nerve-sheath-a-transorbital-ultrasonographic-study-in-healthy-volunteers
#3
M Dinsmore, J S Han, J A Fisher, V W S Chan, L Venkatraghavan
Transorbital ultrasonographic measurement of the diameter of the optic nerve sheath is a non-invasive, bed-side examination for detecting raised intracranial pressure. However, the ability of the optic nerve sheath diameter to predict acute changes in intracranial pressures remains unknown. The aim of this study was to examine the dynamic changes of the optic nerve sheath diameter in response to mild fluctuations in cerebral blood volume induced by changes in end-tidal carbon dioxide. We studied 11 healthy volunteers...
February 8, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28169341/noninvasive-and-quantitative-intracranial-pressure-estimation-using-ultrasonographic-measurement-of-optic-nerve-sheath-diameter
#4
Li-Juan Wang, Yan Yao, Liang-Shu Feng, Yu-Zhi Wang, Nan-Nan Zheng, Jia-Chun Feng, Ying-Qi Xing
We aimed to quantitatively assess intracranial pressure (ICP) using optic nerve sheath diameter (ONSD) measurements. We recruited 316 neurology patients in whom ultrasonographic ONSD was measured before lumbar puncture. They were randomly divided into a modeling and a test group at a ratio of 7:3. In the modeling group, we conducted univariate and multivariate analyses to assess associations between ICP and ONSD, age, sex, BMI, mean arterial blood pressure, diastolic blood pressure. We derived the mathematical function "Xing &Wang" from the modelling group to predict ICP and evaluated the function in the test group...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28146012/identification-of-optic-nerve-swelling-using-point-of-care-ocular-ultrasound-in-children
#5
Ronald F Marchese, Rakesh D Mistry, Gil Binenbaum, Grant T Liu, Richard J Scarfone, Ashley L Woodford, Aaron E Chen
OBJECTIVE: The aim of this study was to determine the feasibility and accuracy of point-of-care (POC) ocular ultrasound (US) when performed by a pediatric emergency medicine (PEM) physician to detect optic nerve abnormalities concerning for swelling, as compared with the fundus examination performed by an ophthalmologist. METHODS: This was a single-center, prospective cohort pilot study of children aged 12 months to 18 years who required optic disc evaluation by an ophthalmologist...
January 31, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28118848/the-association-of-findings-on-brain-computed-tomography-with-neurologic-outcomes-following-extracorporeal-cardiopulmonary-resuscitation
#6
Jeong-Am Ryu, Chi Ryang Chung, Yang Hyun Cho, Kiick Sung, Gee Young Suh, Taek Kyu Park, Young Bin Song, Joo-Yong Hahn, Jin-Ho Choi, Hyeon-Cheol Gwon, Seung-Hyuk Choi, Jeong Hoon Yang
BACKGROUND: Limited data are available on imaging predictors of neurological outcomes after extracorporeal cardiopulmonary resuscitation (ECPR). We investigated the association of initial brain computed tomography (CT) findings with neurological outcomes following ECPR. METHODS: Between February 2005 and December 2015, a total of 42 patients who underwent brain CT scans within 48 h after ECPR were analyzed. Loss of the boundary between gray matter and white matter (LOB) or cortical sulcal effacement (SE), gray-to-white matter ratio (GWR), and optic nerve sheath diameter (ONSD) were measured on initial brain CT...
January 25, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28107408/effect-of-positive-end-expiratory-pressure-on-the-sonographic-optic-nerve-sheath-diameter-as-a-surrogate-for-intracranial-pressure-during-robot-assisted-laparoscopic-prostatectomy-a-randomized-controlled-trial
#7
Ji-Hyun Chin, Wook-Jong Kim, Joonho Lee, Yun A Han, Jinwook Lim, Jai-Hyun Hwang, Seong-Sik Cho, Young-Kug Kim
BACKGROUND: Positive end-expiratory pressure (PEEP) can increase intracranial pressure. Pneumoperitoneum and the Trendelenburg position are associated with an increased intracranial pressure. We investigated whether PEEP ventilation could additionally influence the sonographic optic nerve sheath diameter as a surrogate for intracranial pressure during pneumoperitoneum combined with the Trendelenburg position in patients undergoing robot-assisted laparoscopic prostatectomy. METHODS: After anesthetic induction, 38 patients were randomly allocated to a low tidal volume ventilation (8 ml/kg) without PEEP group (zero end-expiratory pressure [ZEEP] group, n = 19) or low tidal volume ventilation with 8 cmH2O PEEP group (PEEP group, n = 19)...
2017: PloS One
https://www.readbyqxmd.com/read/28072673/the-use-of-ultrasound-measured-optic-nerve-sheath-diameter-to-predict-ventriculoperitoneal-shunt-failure-in-children
#8
Sophia D Lin, Kimberly R Kahne, Amira El Sherif, Kevin Mennitt, David Kessler, Mary J Ward, Shari L Platt
OBJECTIVE: The goal of this study was to assess the accuracy of ultrasound-measured optic nerve sheath diameter (ONSD) as a screen for ventriculoperitoneal shunt failure. METHODS: We prospectively enrolled a convenience sample of children presenting to the ED with suspected shunt failure. The ONSD was measured by ultrasound and compared with computed tomography/magnetic resonance imaging (CT/MRI) and neurosurgical impression. We defined shunt failure on ultrasound as an ONSD greater than 4...
January 9, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/27998455/-optic-nerve-subarachnoid-space-expansion-in-mr-imaging-a-etiology-study
#9
M Li, Q G Xu, J Q Wang, Y R Wang, J Zhao, S H Wei
Objective: To investigate spectrum of causes in optic nerve subarachnoid space (ONSS) expansion by using Magnetic Resonance Imaging (MRI). Methods: A retrospective study. Twenty-six patients (46 eyes) with ONSS expansion and 20 healthy adults (40 eyes) were recruited in Neuro-ophthalmology Department of Chinese PLA General Hospital from January, 2014 to December, 2015. The diameters were measured on the optic nerve (OND) and optic nerve sheath (ONSD) 2.4 mm behind the globe. ONSS was calculated by the formula of (ONSD-OND)/2...
December 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27981690/measuring-changes-in-the-optic-nerve-sheath-diameter-in-patients-with-idiopathic-normal-pressure-hydrocephalus-a-useful-diagnostic-supplement-to-spinal-tap-tests
#10
M Ertl, R Aigner, M Krost, Z Karnasová, K Müller, M Naumann, F Schlachetzki
BACKGROUND AND PURPOSE: Cerebrospinal fluid (CSF) removal improves clinical symptoms of many patients with idiopathic normal-pressure hydrocephalus (iNPH). The aim of this study was to investigate the correlation of changes in the optic nerve sheath diameter (ONSD) with patient responses to CSF removal. METHODS: Transorbital ultrasonography was performed to obtain ONSD measurements in 31 patients with iNPH before and after lumbar puncture. Measurements were obtained while patients were supine and upright...
March 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/27956677/effects-of-pneumoperitoneum-and-trendelenburg-position-on-intracranial-pressure-assessed-using-different-non-invasive-methods
#11
C Robba, D Cardim, J Donnelly, A Bertuccio, S Bacigaluppi, N Bragazzi, B Cabella, X Liu, B Matta, M Lattuada, M Czosnyka
BACKGROUND: The laparoscopic approach is becoming increasingly frequent for many different surgical procedures. However, the combination of pneumoperitoneum and Trendelenburg positioning associated with this approach may increase the patient's risk for elevated intracranial pressure (ICP). Given that the gold standard for the measurement of ICP is invasive, little is known about the effect of these common procedures on ICP. METHODS: We prospectively studied 40 patients without any history of cerebral disease who were undergoing laparoscopic procedures...
December 2016: British Journal of Anaesthesia
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
#12
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
#13
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-icp-in-adult-traumatic-and-non-traumatic-neurosurgical-patients
#14
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...
January 2017: 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
#15
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
#16
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
#17
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
#18
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
#19
MULTICENTER STUDY
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-ct-measurement
#20
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...
December 2016: American Journal of Emergency Medicine
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