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Optic nerve sheath diameter

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https://www.readbyqxmd.com/read/28639043/ultrasonographic-optic-nerve-sheath-diameter-for-predicting-elevated-intracranial-pressure-during-laparoscopic-surgery-a-systematic-review-and-meta-analysis
#1
Eun Jung Kim, Bon-Nyeo Koo, Seung Ho Choi, Kyoungun Park, Min-Soo Kim
BACKGROUND: Laparoscopic surgery involves the creation of a carbon dioxide (CO2) pneumoperitoneum to facilitate a clear surgical view, which may result in an elevated intracranial pressure (ICP). Depending on the surgical area, steep Trendelenburg positioning may be used as well, further increasing the ICP. The objective of this study was to assess the effects of laparoscopic surgery on changes in ICP assessed by ultrasonographic measurement of optic nerve sheath diameter (ONSD), which is a generally accepted simple, reliable, and non-invasive ICP measurement technique...
June 21, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28616896/high-resolution-transbulbar-ultrasonography-helping-differentiate-intracranial-hypertension-in-bilateral-optic-disc-oedema-patients
#2
Qian Chen, Weimin Chen, Min Wang, Xinghuai Sun, Yan Sha, Zhenxin Li, Guohong Tian
PURPOSE: The enlargement of optic nerve sheath diameter (ONSD) has been proven to be related with raised intracranial pressure (ICP). No prospective study has been focused on utilizing retrobulbar ultrasonography in optic disc oedema patient presented to ophthalmologist. METHODS: High-resolution transbulbar ultrasonography was performed in a cohort of patient presented with bilateral optic disc oedema. The subarachnoid space of optic nerve (SAS), ONSD and optic nerve diameter (OND) was measured prior to other ancillaries including lumbar puncture...
June 14, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28611153/effects-of-short-term-mild-hypercapnia-during-head-down-tilt-on-intracranial-pressure-and-ocular-structures-in-healthy-human-subjects
#3
Steven S Laurie, Gianmarco Vizzeri, Giovanni Taibbi, Connor R Ferguson, Xiao Hu, Stuart M C Lee, Robert Ploutz-Snyder, Scott M Smith, Sara R Zwart, Michael B Stenger
Many astronauts experience ocular structural and functional changes during long-duration spaceflight, including choroidal folds, optic disc edema, globe flattening, optic nerve sheath diameter (ONSD) distension, retinal nerve fiber layer thickening, and decreased visual acuity. The leading hypothesis suggests that weightlessness-induced cephalad fluid shifts increase intracranial pressure (ICP), which contributes to the ocular structural changes, but elevated ambient CO2 levels on the International Space Station may also be a factor...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28534259/the-efficacy-of-orbital-ultrasonography-and-magnetic-resonance-imaging-findings-with-direct-measurement-of-intracranial-pressure-in-distinguishing-papilledema-from-pseudopapilledema
#4
Zeynep Ozturk, Tuba Atalay, Ebru Arhan, Kursad Aydin, Ayse Serdaroglu, Tugba Hirfanoglu, Cengiz Havali, Yilmaz Akbas, Duygu Yalinbas
INTRODUCTION: The goal of this study was to evaluate the utility of orbital ultrasonography and magnetic resonance imaging in the diagnosis of idiopathic intracranial hypertension (IIH). METHOD: We reviewed the medical records of patients referred to our department for suspected IIH. RESULTS: Seven children were diagnosed with IIH. Nine children revealed pseudopapilledema by optic coherence tomography and/or orbital ultrasonography. When the axial sequences were reexamined, patients with papilledema had optic nerve sheath (ONS) enlargement (6...
May 22, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28533826/a-novel-triage-tool-optic-nerve-sheath-diameter-in-traumatic-brain-injury-and-its-correlation-to-rotterdam-computed-tomography-ct-scoring
#5
Sudha Kiran Das, Sachin P Shetty, Kamal Kumar Sen
BACKGROUND: Optic nerve sheath diameter (ONSD) evaluated in CT imaging as well as Rotterdam CT Score (RCTS) are proven independent predictors of outcome in patients with traumatic brain injury (TBI). To date, no study has correlated ONSD on admission CT scan with RCTS. MATERIAL/METHODS: Retrospective cohort study comprised of consecutive patients undergoing CT imaging for traumatic brain injury recruited between January and October 2015. Bilateral ONSD was measured 3 mm behind the eyeball in axial and sagittal planes and mean value was calculated...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28486629/effect-of-caudal-block-using-different-volumes-of-local-anaesthetic-on-optic-nerve-sheath-diameter-in-children-a-prospective-randomized-trial
#6
B Lee, B-N Koo, Y S Choi, H K Kil, M-S Kim, J H Lee
Background: Caudal block is commonly administered for postoperative analgesia in children. Although caudal block with 1.5 ml kg -1 local anaesthetic has been reported to reduce cerebral oxygenation in infants, the effect of caudal block on intracranial pressure (ICP) in children has not been well investigated. Optic nerve sheath diameter (ONSD) correlates with degree of ICP. This study aimed to estimate the effects of caudal block on ICP according to volume of local anaesthetic using ultrasonographic measurement of ONSD in children...
May 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28480113/noninvasive-monitoring-intracranial-pressure-a-review-of-available-modalities
#7
REVIEW
Marium Naveed Khan, Hussain Shallwani, Muhammad Ulusyar Khan, Muhammad Shahzad Shamim
BACKGROUND: Intracranial pressure (ICP) monitoring is important in many neurosurgical and neurological patients. The gold standard for monitoring ICP, however, is via an invasive procedure resulting in the placement of an intraventricular catheter, which is associated with many risks. Several noninvasive ICP monitoring techniques have been examined with the hope to replace the invasive techniques. The goal of this paper is to provide an overview of all modalities that have been used for noninvasive ICP monitoring to date...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28480083/optic-nerve-sheath-diameter-as-a-bedside-assessment-for-elevated-intracranial-pressure
#8
Peter Williams
A previously fit and healthy 26-year-old lady with no significant medical history presented with a two-month history of headaches. The headaches were prolonged, generalised, and unusually severe for the patient. Examination revealed papilloedema. The patient's optic nerve sheath diameter was measured 3 mm posterior to the globe and found to be 7.5 mm. The patient subsequently had computed tomography scan of her brain that showed an optic nerve sheath diameter of 7.56 mm as measured 3 mm posterior to the globe...
2017: Case Reports in Critical Care
https://www.readbyqxmd.com/read/28473274/alterations-in-optic-nerve-sheath-diameter-according-to-cerebrovascular-disease-sub-groups
#9
Emre Gökcen, İbrahim Caltekin, Atakan Savrun, Hilal Korkmaz, Şeyda Tuba Savrun, Gökhan Yıldırım
BACKGROUND: ONSD (optic nerve sheath diameter) is a method used for indirect measurement of the increased intracranial pressure. In previous studies, the relation between the increased intracranial pressure and ONSD was analyzed in the patients suffering from cerebrovascular diseases (CVD). In our study, the patients suffering from ischemic CVD were categorized into 4 subgroups according to Oxfordshire Community Stroke Project classification (OCSP); the relationship between each group and ONSD, and the influence on each eye were analyzed...
April 30, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28457565/response-to-a-letter-to-the-editor-ultrasound-assessment-of-optic-nerve-sheath-diameter-in-healthy-volunteers
#10
Lawrence M Gillman, Frederick A Zeiler, Bertram Unger, Dimitrios Karakitsos
No abstract text is available yet for this article.
April 20, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28452990/relationship-between-the-optic-nerve-sheath-diameter-and-lumbar-cerebrospinal-fluid-pressure-in-patients-with-normal-tension-glaucoma
#11
A Pircher, M Montali, J Berberat, L Remonda, H E Killer
PurposeTo investigate on the relationship between the optic nerve sheath diameter (ONSD) and the lumbar cerebrospinal fluid pressure (CSF-p) in Caucasian patients with normal tension glaucoma (NTG).Patients and methodsRetrospective analysis of medical records of patients with open-angle glaucoma in the period from 2005 to 2015 from the Ophthalmology Department, Cantonal Hospital Aarau, Switzerland was performed. A total of 38 patients (mean age 68.6±11.3 years, 21 females and 17 males) fulfilled the diagnostic criteria of NTG and underwent computed tomography (CT) of the orbit and lumbar puncture (LP)...
April 28, 2017: Eye
https://www.readbyqxmd.com/read/28431869/the-diagnostic-and-prognostic-value-of-the-optic-nerve-sheath-diameter-on-ct-for-diagnosis-spontaneous-subarachnoid-hemorrhage
#12
Murat Yesilaras, Turgay Yilmaz Kilic, Suveyda Yesilaras, Ozge Duman Atilla, Dilek Öncel, Mahmut Çamlar
INTRODUCTION: The aim of this study was to investigate the relationship between the optic nerve sheath diameter (ONSD) measured on non-contrast head computed tomography (CT) and the diagnosis and prognosis of spontaneous subarachnoid hemorrhage (SAH) on emergency department (ED) patients. METHOD: We used a matched control group of patients with the same age and gender who were diagnosed in the ED with spontaneous SAH and who admitted to the ED with headache. Four emergency medicine attending physicians made the ONSD measurements...
April 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28421189/optic-nerve-sheath-diameter-ultrasound-evaluation-in-intensive-care-unit-possible-role-and-clinical-aspects-in-neurological-critical-patients-daily-monitoring
#13
M Toscano, G Spadetta, P Pulitano, M Rocco, V Di Piero, O Mecarelli, E Vicenzini
Background. The increase of the optic nerve sheath diameter (ONSD) is a reliable, noninvasive sonographic marker of intracranial hypertension. Aim of the study was to demonstrate the efficacy of ONSD evaluation, when monitoring neurocritical patients, to early identify malignant intracranial hypertension in patients with brain death (BD). Methods. Data from ultrasound ONSD evaluation have been retrospectively analyzed in 21 sedated critical patients with neurological diseases who, during their clinical course, developed BD...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28405042/ultrasonographic-measurement-of-optic-nerve-sheath-diameter-a-point-of-care-test-helps-in-prognostication-of-intensive-care-unit-patients
#14
Arnab Banerjee, Renu Bala, Savita Saini
Early identification of elevated intracranial pressure (ICP) is critical to ensuring timely and appropriate management to improve patient outcome. Measurement of the optic nerve sheath diameter by ultrasound is a well studied modality for noninvasive assessment of ICP. Recent studies have shown it to correlate with invasively measured ICP. We utilized this technique in our ICU and found it to be of great help in guiding patient management and predicting the prognosis. A case series of four patients is reported illustrating its utility in ICU patients...
March 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28390163/coronal-axis-measurement-of-the-optic-nerve-sheath-diameter
#15
LETTER
Giorgio Iaconetta, Maddalena De Bernardo, Nicola Rosa
No abstract text is available yet for this article.
May 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28383859/-ultrasonographic-measurement-of-the-optical-nerve-sheath-for-the-diagnosis-of-intracranial-hypertension-in-the-emergency-room-a-case-report
#16
R Levy, B Kerzmann, V Franssen, A S Schwab, J F Adam, Th Sottiaux
Early diagnosis and treatment of intracranial hypertension (ICHT) are major components of the management of neurological emergencies. The optic nerve sheath diameter is closely dependent on intracranial pressure and can be measured by bedside ultrasound (US). We report the story of a 70-year-old COPD patient initially admitted to the emergency room for a sepsis of pulmonary origin. An unusual confusion prompted us to perform an US of the optic nerve sheath. This exam clearly suggested the presence of an ICHT...
June 2016: Revue Médicale de Liège
https://www.readbyqxmd.com/read/28370143/inter-rater-reliability-of-sonographic-optic-nerve-sheath-diameter-measurements-by-emergency-medicine-physicians
#17
Stephanie Oberfoell, David Murphy, Andrew French, Stacy Trent, David Richards
OBJECTIVES: To compare the degree of agreement of sonographic optic nerve sheath diameter (ONSD) measurements by ultrasound fellowship-trained and resident emergency medicine (EM) physicians. METHODS: Ten ultrasound fellowship-trained EM attending physicians from multiple institutions and 51 resident EM physicians at a single residency were enrolled to measure the ONSD using a computerized ruler on five separate still-frame sonograms of adult eyes that included the retrobulbar optic nerve...
April 3, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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
#18
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
#19
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
#20
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...
May 2017: Anaesthesia
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