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Chiara Robba, Danilo Cardim, Tamara Tajsic, Justine Pietersen, Michael Bulman, Frank Rasulo, Rita Bertuetti, Joseph Donnelly, Liu Xiuyun, Zofia Czosnyka, Manuel Cabeleira, Peter Smielewski, Basil Matta, Alessandro Bertuccio, Marek Czosnyka
BACKGROUND: Non-invasive measurement of intracranial pressure (ICP) can be invaluable in the management of critically ill patients. Invasive measurement of ICP remains the "gold standard" and should be performed when clinical indications are met, but it is invasive and brings some risks. In this project, we aim to validate the non-invasive ICP (nICP) assessment models based on arterious and venous transcranial Doppler ultrasonography (TCD) and optic nerve sheath diameter (ONSD)...
2018: Acta Neurochirurgica. Supplement
Abdulla Watad, Nicola L Bragazzi, Susanna Bacigaluppi, Howard Amital, Samaa Watad, Kassem Sharif, Bishara Bisharat, Anna Siri, Ala Mahamid, Hakim Abu Ras, Ahmed Nasr, Federico Bilotta, Chiara Robba, Mohammad Adawi
BACKGROUND: Artificial Intelligence (AI) techniques play a major role in anesthesiology, even though their importance is often overlooked. In the extant literature, AI approaches, such as Artificial Neural Networks (ANNs), have been underutilized, mainly being used to model patient's consciousness state, to predict the precise amount of anesthetic gases, the level of analgesia, or the need of anesthesiological blocks, among others. In the field of neurosurgery, ANNs have been effectively applied to the diagnosis and prognosis of cerebral tumors, seizures, low back pain, and also to the monitoring of intracranial pressure (ICP)...
February 23, 2018: Journal of Neurosurgical Sciences
Yücel Yüzbaşıoğlu, Sema Yüzbaşıoğlu, Selçuk Coşkun, Ferhat İçme, Tolga Öz, Refik Kunt, Sinan Becel, Emine Akçay, Havva Şahin Kavaklı
Background/aim: We aimed to show the role of determination of optic nerve sheath diameter (ONSD) by bedside ultrasonography in an emergency department in the diagnosis of cerebrovascular disorders and its correlation with the clinical picture. Materials and methods: This prospective cross-sectional study included 55 patients with cerebrovascular disorders and 53 controls. Age, sex, ONSD, comorbid disease status, and multidetector computed tomography results of all subjects and application periods and National Institutes of Health Stroke Scale (NIHSS) scores of the patient group were evaluated...
February 23, 2018: Turkish Journal of Medical Sciences
Shahan Waheed, Muhammad Akbar Baig, Emaduddin Siddiqui, Danyal Jamil, Masharib Bashar, Asher Feroze
Optic nerve sheath diameter measurement (ONSD) has been associated with identifying the prognosis of traumatic brain injury (TBI) patients. The study was planned to evaluate the prognostic value of ONSD measured on the initial brain computed tomography (CT) scan performed on patients with blunt TBI in the emergency department(ED). This retrospective cross-sectional study was conducted at the Aga Khan University Hospital, Karachi, and comprised data of moderate and severe TBI patients from January to December 2014...
February 2018: JPMA. the Journal of the Pakistan Medical Association
Hyung-Chul Lee, Won-Jong Lee, Yun-Sik Dho, Won-Sang Cho, Yong Hwy Kim, Hee-Pyoung Park
OBJECTIVE: The usefulness of optic nerve sheath diameter (ONSD) in predicting increased intracranial pressure (ICP) is not well established in adults with hydrocephalus. In this retrospective study, we evaluated the correlation between ONSD measured on brain computed tomography (CT) and ICP in adults with hydrocephalus. PATIENTS AND METHODS: ONSDs were measured on preoperative brain CT images from 64 adult patients with hydrocephalus who underwent extracranial ventricular drainage or a ventriculoperitoneal shunt in 2016...
February 7, 2018: Clinical Neurology and Neurosurgery
In-Jung Jun, Myong Kim, Joonho Lee, Se-Ung Park, Jai-Hyun Hwang, Jun Hyuk Hong, Young-Kug Kim
INTRODUCTION: Carbon dioxide pneumoperitoneum and the steep Trendelenburg position during robot-assisted laparoscopic prostatectomy (RALP) can increase the intracranial pressure (ICP). Mannitol is widely used to treat increased ICP. However, no studies to date have specifically evaluated the effect of mannitol on ICP in patients undergoing RALP. Ultrasonographic measurement of the optic nerve sheath diameter (ONSD) is considered a reliable technique to noninvasively evaluate the ICP. Therefore, this study compared ONSDs as a surrogate for ICP before and after mannitol administration in prostate cancer patients undergoing RALP...
February 7, 2018: Journal of Endourology
Li-Juan Wang, Li-Min Chen, Ying Chen, Li-Yang Bao, Nan-Nan Zheng, Yu-Zhi Wang, Ying-Qi Xing
Importance: The crtierion standard method for monitoring intracranial pressure (ICP) can result in complications and pain. Hence, noninvasive, repeatable methods would be valuable. Objective: To examine how ultrasonographic optic nerve sheath diameter (ONSD) correlated with noninvasive and dynamically monitored ICP changes. Design, Setting, and Participants: The ONSD was measured before the lumbar puncture (LP) in 60 patients on admission...
February 1, 2018: JAMA Ophthalmology
Mostafa Haredy, Giulio Zuccoli, Mandeep Tamber, Amani Davis, Ken Nischal, Jesse A Goldstein
PURPOSE: This study aims to evaluate accuracy of optic nerve sheath diameter (ONSD) measurements obtained by magnetic resonance imaging (MRI) in patients with craniosynostosis (CS) for detection of high intracranial pressure (ICP) and to correlate MRI-derived ONSD measurements with those obtained by computed tomography (CT) scans in CS patients. METHODS: A retrospective review was conducted on CS patients who had MRI- and age-matched controls with normal MRI. Diagnosis of intracranial hypertension was based on presence of papilledema, direct ICP monitoring, and/or lumbar puncture...
January 29, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Matthew Lyon, Parth Agrawal, Kyle Friez, Richard Gordon, Ivan Morales, Li Fang Zhang, Hongyan Xu, Ian Heger, Robert W Gibson
Optic nerve sheath diameter (ONSD) measured by transocular ultrasound is a marker of real-time intracranial pressure (ICP). The objective of this study was to evaluate the association between optic nerve sheath (ONS) dilation after a Valsalva maneuver and a prior history of mild to moderate traumatic brain injury (mTBI) in a heterogeneous sample of participants. Participants were excluded if they had had a recent brain injury, were symptomatic from a prior brain injury, had a history consistent with severe TBI and/or had undergone intracranial surgery...
January 22, 2018: Journal of Neurotrauma
Getaw Worku Hassen, Mohammed Al-Juboori, Barbara Koppel, Gokhan Akfirat, Hossein Kalantari
Measurement of optic nerve sheath diameter (ONSD) using point of care ultrasound has been used to indirectly assess the intracranial pressure (ICP) particularly in conditions where it is raised. Direct pressure measurements using probes reaching the ventricle system correlated with ONSD using ultrasound. Attempts were made to measure the ONSD pre and post lumbar puncture (LP) after draining cerebrospinal fluid (CSF) as well as post ventricular shunt placement. We report ONSD measurement and demonstrate dynamic changes during LP in a patient with known idiopathic intracranial hypertension (IIH)...
January 10, 2018: American Journal of Emergency Medicine
Hanruo Liu, Diya Yang, Teng Ma, Wenyuan Shi, Zhu Qiang, Jun Kang, Ningli Wang
PURPOSE: To measure the area of the optic nerve subarachnoid space (ONSASA) in patients with normal tension (NTG), primary open angle glaucoma (POAG) and controls and examine its association with relevant ocular and systemic parameters. DESIGN: Cross-sectional study. METHODS: The study included 40 patients with NTG, 42 with POAG and 45 healthy controls. B-scan ultrasound was performed binocularly, using a 12.5 MHz linear array probe. The measurement of the optic nerve subarachnoid space (ONSAS) and calculation of the ONSASA were used ImageJ1...
December 12, 2017: American Journal of Ophthalmology
Joshua J Smith, Daniel J Fletcher, Stacy D Cooley, Margret S Thompson
OBJECTIVE: To develop a reference range for ultrasonographically measured optic nerve sheath diameter (ONSD-US) in dogs. We hypothesized that ONSD-US can be measured reliably and is associated with weight but not age, sex, or body condition score (BCS), and that the relationship between weight and ONSD-US in dogs is allometric due to canine size variations. DESIGN: Prospective, observational study. SETTING: University teaching hospital. ANIMALS: Seventy-eight healthy adult dogs...
January 2018: Journal of Veterinary Emergency and Critical Care
Dong Hwan Kim, Jin-Sun Jun, Ryul Kim
The optic nerve sheath diameter (ONSD) is considered as an indirect marker for intracranial pressure (ICP). However, the optimal cut-off value for an abnormal ONSD indicating elevated ICP and its associated factors have been unclear. Thus, we investigated normative values for the ONSD using ultrasonography and investigate the potential factors affecting it. We prospectively recruited healthy volunteers between September 2016 and March 2017. A total of 585 individuals were included, in which the mean ONSD was 4...
November 21, 2017: Scientific Reports
A K Thotakura, N R Marabathina, A R Danaboyina, R R Mareddy
OBJECTIVES: To compare optic nerve sheath diameter (ONSD) measurements in head injury patients with a group of normal subjects and investigate the significance of serial ONSD monitoring in head injury patients. METHODS: All patients with a head injury admitted to our hospital with a program of conservative management at the time of admission were included in this prospective study. On admission, the patient was assessed using the Glasgow Coma Scale (GCS), orbital ultrasound for optic nerve sheath diameter (ONSD), and CT brain scan...
December 2017: Neuro-Chirurgie
Roberto Saenz, Han Cheng, Thomas C Prager, Laura J Frishman, Rosa A Tang
SIGNIFICANCE: Differentiating papilledema from pseudopapilledema reflecting tilted/crowded optic discs or disc drusen is critical but can be challenging. Our study suggests that spectral-domain optical coherence tomography (OCT) peripapillary retinal nerve fiber layer thickness and retrobulbar optic nerve sheath diameter (ONSD) measured by A-scan ultrasound provide useful information when differentiating the two conditions. PURPOSE: To evaluate the use of A-scan ultrasound and spectral-domain OCT retinal nerve fiber layer thickness (RNFLT) in differentiating papilledema associated with idiopathic intracranial hypertension from pseudopapilledema...
December 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Marc Kermorgant, Florian Leca, Nathalie Nasr, Marc-Antoine Custaud, Thomas Geeraerts, Marek Czosnyka, Dina N Arvanitis, Jean-Michel Senard, Anne Pavy-Le Traon
Dry immersion (DI) is used to simulate weightlessness. We investigated in healthy volunteers if DI induces changes in ONSD, as a surrogate marker of intracranial pressure (ICP) and how these changes could affect cerebral autoregulation (CA). Changes in ICP were indirectly measured by changes in optic nerve sheath diameter (ONSD). 12 healthy male volunteers underwent 3 days of DI. ONSD was indirectly assessed by ocular ultrasonography. Cerebral blood flow velocity (CBFV) of the middle cerebral artery was gauged using transcranial Doppler ultrasonography...
2017: Frontiers in Physiology
Dachuan Liu, Zhen Li, Xuxiang Zhang, Liping Zhao, Jianping Jia, Fei Sun, Yaxing Wang, Daqing Ma, Wenbin Wei
BACKGROUND: Ultrasonograpic retrobulbar optic nerve sheath diameter (ONSD) measurement is considered to be an alternative noninvasive method to estimate intracranial pressure,but the further validation is urgently needed. The aim of the current study was to investigate the association of the ultrasonographic ONSD and intracranial pressure (ICP) in patients. METHODS: One hundred and ten patients whose intracranial pressure measured via lumbar puncture were enrolled in the study...
September 29, 2017: BMC Neurology
Nishant Sahay, Shalini Sharma, Umesh K Bhadani, Akhilesh Singh, Chandni Sinha, Anubha Sahay, Alok Ranjan, Mukta Agarwal
STUDY OBJECTIVE: To evaluate the effect of pneumoperitoneum and head position during laparoscopic surgery on intracranial pressures (ICPs) using sonographic measurements of optic nerve sheath diameter (ONSD). DESIGN: Prospective observational study (Canadian Task Force classification II-1). SETTING: A tertiary-level hospital. PATIENTS: Sixty-one women aged 15 to 50 years with American Society of Anesthesiologists grade 1 risk and body mass index ≤ 29 kg/m2 were admitted to the hospital between November 2015 and October 2016 for elective laparoscopic surgery and were included in this study...
January 2018: Journal of Minimally Invasive Gynecology
Jin Pyeong Jeon, Si Un Lee, Sung-Eun Kim, Suk Hyung Kang, Jin Seo Yang, Hyuk Jai Choi, Yong Jun Cho, Seung Pil Ban, Hyoung Soo Byoun, Young Soo Kim
OBJECTIVES: The correlation of optic nerve sheath diameter (ONSD) as seen on ultrasonography (US) and directly measured intracranial pressure (ICP) has been well described. Nevertheless, differences in ethnicity and type of ICP monitor used are obstacles to the interpretation. Therefore, we investigated the direct correlation between ONSD and ventricular ICP and defined an optimal cut-off point for identifying increased ICP (IICP) in Korean adults with brain lesions. METHODS: This prospective study included patients who required an external ventricular drainage (EVD) catheter for ICP control...
2017: PloS One
Casey M Woster, Michael D Zwank, Joseph R Pasquarella, Sandi S Wewerka, Jeffrey P Anderson, Jessica T Greupner, Sakib Motalib
INTRODUCTION: Blunt head trauma is a common cause of increased intracranial pressure (ICP). Ultrasound measurement of the optic nerve sheath diameter (OSND) is an accurate and non-invasive way to detect increased ICP. Blunt trauma patients are often immobilized in a rigid cervical spine collar. Our objective was to describe the changes in ONSD following the placement of a c-collar and determine if any changes were time-dependent. METHODS: We performed a prospective cohort study measuring the ONSD of healthy volunteers before and after placement of a c-collar...
August 26, 2017: American Journal of Emergency Medicine
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