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Intracranial pressure monitors

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https://www.readbyqxmd.com/read/28627088/astrogliosis-and-impaired-aquaporin-4-and-dystrophin-systems-in-idiopathic-normal-pressure-hydrocephalus
#1
Per Kristian Eide, Hans-Arne Hansson
AIMS: Idiopathic normal pressure hydrocephalus (iNPH) is one subtype of dementia that may improve following drainage of cerebrospinal fluid (CSF). This prospective observational study explored whether expression of the water channel aquaporin-4 (AQP4) and the anchoring molecule dystrophin 71 (Dp71) are altered at astrocytic perivascular endfeet and in adjacent neuropil of iNPH patient. Observations were related to measurements of pulsatile and static intracranial pressure (ICP). METHODS: The study included iNPH patients undergoing overnight monitoring of the pulsatile/static ICP, in whom a biopsy was taken from the frontal cerebral cortex during placement of the ICP sensor...
June 19, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28625587/a-rabbit-model-of-aneurysmal-subarachnoid-hemorrhage-by-ear-central-artery-suprasellar-cistern-shunt
#2
Jing Lu, Fuxiang Chen, Bing Cai, Fan Chen, Dezhi Kang
Aneurysmal subarachnoid hemorrhage (aSAH) is a life-threatening hemorrhagic cerebrovascular disease. The concept of early brain injury (EBI), induced by sharply increased intracranial pressure (ICP) and low cerebral perfusion pressure (CPP) with cerebral global ischemia following aneurysm rupture, has been increasingly accepted. However, EBI has not been well studied partly due to lack of an ideal animal model. The purpose of this study was to establish a new aSAH model which can mimic the pathophysiological damage of EBI...
June 15, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28624560/intracranial-hypotension-following-traumatic-brain-injury-a-diagnostic-and-therapeutic-challenge
#3
Jacob Chen Ming Low, Anan Shtaya, Samantha Hettige
BACKGROUND: Intracranial hypotension (IH) is a recognised cause of coma, however, the diagnosis is often challenging, especially in patients with superimposed traumatic brain injury (TBI). CASE REPORT: We report a case of a 67-year-old patient who became comatose following evacuation of bilateral acute subdural haematomas with concurrent respiratory failure. Imaging and intraparenchymal intracranial pressure (ICP) monitoring confirmed secondary IH. She was managed with an epidural blood patch, and a 72 hours period in the trendelenberg position guided by ICP monitoring and clinical assessment...
June 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28623520/prediction-of-intracranial-hypertension-through-noninvasive-intracranial-pressure-waveform-analysis-in-pediatric-hydrocephalus
#4
Matheus Fernando Manzolli Ballestero, Gustavo Frigieri, Brenno Caetano Troca Cabella, Sergio Mascarenhas de Oliveira, Ricardo Santos de Oliveira
PURPOSE: The purpose of this study is to evaluate a noninvasive device to assess intracranial pressure wave form in children with hydrocephalus. METHODS: A prospective and non-experimental descriptive-analytic study was performed. Fifty-six patients were enrolled in this study. They were divided in four groups: group A, children with clinically compensated hydrocephalus; B, surgically treated hydrocephalus; C, patients with acute intracranial hypertension due to hydrocephalus; and D, children without neurological disease (control)...
June 16, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28623468/-intracranial-pressure-monitoring-in-polytrauma-patients-with-traumatic-brain-injury
#5
REVIEW
T Neubauer, W Buchinger, E Höflinger, J Brand
BACKGROUND: The monitoring of intracranial pressure (ICP) represents a cornerstone in the intensive care of patients with traumatic brain injury (TBI) and the industry provides various technical solutions to this end. Decompressive craniectomy can be an option if conservative measures fail to reduce excessive ICP. OBJECTIVE: To examine the pathophysiology of ICP in trauma, the management of polytrauma involving TBI, and the indications for decompressive craniectomy; and to compare the different monitoring systems and their complications...
June 16, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28614970/effect-of-cerebrospinal-fluid-drainage-on-brain-tissue-oxygenation-in-traumatic-brain-injury
#6
Omar S Akbik, Mark Krasberg, Edwin M Nemoto, Howard Yonas
The effectiveness of cerebrospinal fluid (CSF) drainage in lowering high intracranial pressure (ICP) is well established in severe traumatic brain injury (TBI). However, recently the use of external ventricular drains and intracranial pressure monitors in traumatic brain injury has come under question. The aim of this retrospective study was to investigate the effect of CSF drainage on brain tissue oxygenation (PbtO2). Using a multimodality monitoring system, we continuously monitored brain tissue oxygenation (PbtO2) and parenchymal ICP during CSF drainage events via a ventriculostomy in 40 patients with severe traumatic brain injury (TBI)...
June 14, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28584914/optical-coherence-tomography-for-the-diagnosis-and-monitoring-of-idiopathic-intracranial-hypertension
#7
Philipp Albrecht, Christine Blasberg, Marius Ringelstein, Ann-Kristin Müller, David Finis, Rainer Guthoff, Ella-Maria Kadas, Wolf Lagreze, Orhan Aktas, Hans-Peter Hartung, Friedemann Paul, Alexander U Brandt, Axel Methner
The objectives of the study were to investigate the value of optical coherence tomography in detecting papilledema in patients with idiopathic intracranial hypertension (IIH), a disease which is difficult to monitor and which can lead to permanent visual deficits; to analyze retinal changes over time. In this non-interventional case-control study, spectral-domain optical coherence tomography (SD-OCT) was used to analyze the retinal and optic nerve head (ONH) morphology of 21 patients with IIH and 27 age- and sex-matched healthy controls over time...
June 5, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28582931/a-surface-acoustic-wave-icp-sensor-with-good-temperature-stability
#8
Bing Zhang, Hong Hu, Aipeng Ye, Peng Zhang
BACKGROUND: Intracranial pressure (ICP) monitoring is very important for assessing and monitoring hydrocephalus, head trauma and hypertension patients, which could lead to elevated ICP or even devastating neurological damage. The mortality rate due to these diseases could be reduced through ICP monitoring, because precautions can be taken against the brain damage. OBJECTIVE: This paper presents a surface acoustic wave (SAW) pressure sensor to realize ICP monitoring, which is capable of wireless and passive transmission with antenna attached...
May 26, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28574313/rationale-for-graft-selection-in-patients-with-complex-internal-carotid-artery-aneurysms-treated-with-extracranial-to-intracranial-high-flow-bypass-and-therapeutic-internal-carotid-artery-occlusion
#9
Hidetoshi Matsukawa, Shiro Miyata, Toshiyuki Tsuboi, Kosumo Noda, Nakao Ota, Osamu Takahashi, Rihee Takeda, Sadahisa Tokuda, Hiroyasu Kamiyama, Rokuya Tanikawa
OBJECTIVE After internal carotid artery (ICA) sacrifice without revascularization for complex aneurysms, ischemic complications can occur. In addition, hemodynamic alterations in the circle of Willis create conditions conducive to the formation of de novo aneurysms or the enlargement of existing untreated aneurysms. Therefore, the revascularization technique remains indispensable. Because vessel sizes and the development of collateral circulation are different in each patient, the ideal graft size to prevent low flow-related ischemic complications (LRICs) in external carotid artery (ECA)-middle cerebral artery (MCA) bypass with therapeutic ICA occlusion (ICAO) has not been well established...
June 2, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28574312/elevated-intracranial-pressure-and-reversible-eye-tracking-changes-detected-while-viewing-a-film-clip
#10
Radek Kolecki, Vikalpa Dammavalam, Abdullah Bin Zahid, Molly Hubbard, Osamah Choudhry, Marleen Reyes, ByoungJun Han, Tom Wang, Paraskevi Vivian Papas, Aylin Adem, Emily North, David T Gilbertson, Douglas Kondziolka, Jason H Huang, Paul P Huang, Uzma Samadani
OBJECTIVE The precise threshold differentiating normal and elevated intracranial pressure (ICP) is variable among individuals. In the context of several pathophysiological conditions, elevated ICP leads to abnormalities in global cerebral functioning and impacts the function of cranial nerves (CNs), either or both of which may contribute to ocular dysmotility. The purpose of this study was to assess the impact of elevated ICP on eye-tracking performed while patients were watching a short film clip. METHODS Awake patients requiring placement of an ICP monitor for clinical purposes underwent eye tracking while watching a 220-second continuously playing video moving around the perimeter of a viewing monitor...
June 2, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28571485/continuous-autoregulatory-indices-derived-from-multi-modal-monitoring-each-one-is-not-like-the-other
#11
Frederick Adam Zeiler, Joseph Donnelly, David Menon, Peter Smieleweski, Christian Zweifel, Ken Brady, Marek Czosnyka
We assess the relationships between various continuous measures of autoregulatory capacity in an adult TBI cohort. We assessed relationships between autoregulatory indices derived from intracranial pressure (ICP: PRx, PAx, RAC), Transcranial Doppler (TCD: Mx, Sx, Dx), brain tissue-oxygenation (ORx), and spatially resolved near infrared spectroscopy (NIRS resolved: TOx, THx). Relationships between indices were assessed using Pearson correlation coefficient, Friedman (KW) test, Principle component analysis (PCA), Agglomerative Hierarchal Clustering (AHC) and K-Means Cluster Analysis (KMCA)...
June 1, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28560487/effect-of-venous-stenting-on-intracranial-pressure-in-idiopathic-intracranial-hypertension
#12
Samir A Matloob, Ahmed K Toma, Simon D Thompson, Chee L Gan, Fergus Robertson, Lewis Thorne, Laurence D Watkins
BACKGROUND: Idiopathic intracranial hypertension (IIH) is characterised by an increased intracranial pressure (ICP) in the absence of any central nervous system disease or structural abnormality and by normal CSF composition. Management becomes complicated once surgical intervention is required. Venous sinus stenosis has been suggested as a possible aetiology for IIH. Venous sinus stenting has emerged as a possible interventional option. Evidence for venous sinus stenting is based on elimination of the venous pressure gradient and clinical response...
May 31, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28559070/severe-traumatic-brain-injury-at-a-tertiary-referral-center-in-tanzania-epidemiology-and-adherence-to-brain-trauma-foundation-guidelines
#13
Luke R Smart, Halinder S Mangat, Benson Issarow, Paul McClelland, Gerald Mayaya, Emmanuel Kanumba, Linda M Gerber, Xian Wu, Robert N Peck, Isidore Ngayomela, Malik Fakhar, Philip E Stieg, Roger Härtl
BACKGROUND: Severe traumatic brain injury (TBI) is a major cause of death and disability worldwide. However, prospective TBI data from sub-Saharan Africa are sparse. This study examines the epidemiology, and explores management of severe TBI patients and adherence to the Brain Trauma Foundation (BTF) Guidelines at a tertiary care referral hospital in Tanzania. METHODS: Patients with severe TBI hospitalized at Bugando Medical Centre, Mwanza, Tanzania, were recorded in a prospective registry...
May 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28555164/brain-multimodality-monitoring-a-new-tool-in-neurocritical-care-of-comatose-patients
#14
REVIEW
Nudrat Tasneem, Edgar A Samaniego, Connie Pieper, Enrique C Leira, Harold P Adams, David Hasan, Santiago Ortega-Gutierrez
Neurocritical care patients are at risk of developing secondary brain injury from inflammation, ischemia, and edema that follows the primary insult. Recognizing clinical deterioration due to secondary injury is frequently challenging in comatose patients. Multimodality monitoring (MMM) encompasses various tools to monitor cerebral metabolism, perfusion, and oxygenation aimed at detecting these changes to help modify therapies before irreversible injury sets in. These tools include intracranial pressure (ICP) monitors, transcranial Doppler (TCD), Hemedex™ (thermal diffusion probe used to measure regional cerebral blood flow), microdialysis catheter (used to measure cerebral metabolism), Licox™ (probe used to measure regional brain tissue oxygen tension), and continuous electroencephalography...
2017: Critical Care Research and Practice
https://www.readbyqxmd.com/read/28548592/intracranial-pressure-monitoring-in-severe-blunt-head-trauma-does-the-type-of-monitoring-device-matter
#15
Alberto Aiolfi, Desmond Khor, Jayun Cho, Elizabeth Benjamin, Kenji Inaba, Demetrios Demetriades
OBJECTIVE Intracranial pressure (ICP) monitoring has become the standard of care in the management of severe head trauma. Intraventricular devices (IVDs) and intraparenchymal devices (IPDs) are the 2 most commonly used techniques for ICP monitoring. Despite the widespread use of these devices, very few studies have investigated the effect of device type on outcomes. The purpose of the present study was to compare outcomes between 2 types of ICP monitoring devices in patients with isolated severe blunt head trauma...
May 26, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28547321/relationship-between-brain-pulsatility-and-cerebral-perfusion-pressure-replicated-validation-using-different-drivers-of-cpp-change
#16
Leanne A Calviello, Nicolás de Riva, Joseph Donnelly, Marek Czosnyka, Peter Smielewski, David K Menon, Frederick A Zeiler
BACKGROUND: Determination of relationships between transcranial Doppler (TCD)-based spectral pulsatility index (sPI) and pulse amplitude (AMP) of intracranial pressure (ICP) in 2 groups of severe traumatic brain injury (TBI) patients (a) displaying plateau waves and (b) with unstable mean arterial pressure (MAP). METHODS: We retrospectively reviewed patients with severe TBI and continuous TCD monitoring displaying either plateau waves or unstable MAP from 1992 to 1998...
May 25, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28541158/noninvasive-optical-monitoring-of-critical-closing-pressure-and-arteriole-compliance-in-human-subjects
#17
Wesley B Baker, Ashwin B Parthasarathy, Kimberly P Gannon, Venkaiah C Kavuri, David R Busch, Kenneth Abramson, Lian He, Rickson C Mesquita, Michael T Mullen, John A Detre, Joel H Greenberg, Daniel J Licht, Ramani Balu, W Andrew Kofke, Arjun G Yodh
The critical closing pressure ( CrCP) of the cerebral circulation depends on both tissue intracranial pressure and vasomotor tone. CrCP defines the arterial blood pressure ( ABP) at which cerebral blood flow approaches zero, and their difference ( ABP -  CrCP) is an accurate estimate of cerebral perfusion pressure. Here we demonstrate a novel non-invasive technique for continuous monitoring of CrCP at the bedside. The methodology combines optical diffuse correlation spectroscopy (DCS) measurements of pulsatile cerebral blood flow in arterioles with concurrent ABP data during the cardiac cycle...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28539078/can-we-safely-monitor-posterior-fossa-intracranial-pressure-a-cadaveric-study
#18
Vicente Vanaclocha, Nieves Sáiz-Sapena, Marlon Rivera-Paz, Juan Manuel Herrera, José María Ortiz-Criado, Francisco Verdu-López, Leyre Vanaclocha
BACKGROUND: measuring intracranial pressure (ICP) is considered the gold standard of care for brain injury. While supratentorial ICP monitoring has been adopted everywhere, posterior fossa ICP monitoring is rarely performed. In this study, we aimed to evaluate the feasibility of inserting ICP sensors into the posterior fossa of cadavers, to measure ICP in the posterior fossa. METHODS: An ICP sensor was transcranially implanted into the posterior fossa of fifteen fresh adult cadavers...
May 25, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28538329/perioperative-care-for-pediatric-patients-with-penetrating-brain-injury-a-review
#19
Marco Mikhael, Elizabeth Frost, Maria Cristancho
Traumatic brain injury (TBI) continues to be the leading cause of death and acquired disability in young children and adolescents, due to blunt or penetrating trauma, the latter being less common but more lethal. Penetrating brain injury (PBI) has not been studied extensively, mainly reported as case reports or case series, due to the assumption that both types of brain injury have common pathophysiology and consequently common management. However, recommendations and guidelines for the management of PBI differ from those of blunt TBI in regards to neuroimaging, intracranial pressure (ICP) monitoring, and surgical management including those pertaining to vascular injury...
May 19, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28511149/analysis-of-extracellular-brain-chemistry-during-percutaneous-dilational-tracheostomy-a-retrospective-study-of-19-patients
#20
Jan Küchler, Jann Wojak, Abdulkareem Abusamha, Claudia Ditz, Volker Martin Tronnier, Jan Gliemroth
OBJECTIVE: The purpose of this study was to analyze changes in brain tissue chemistry around percutaneous dilational tracheostomy (PDT) in patients with acute brain injury (ABI) in a retrospective single-center analysis. PATIENTS AND METHODS: We included 19 patients who had continuous monitoring of brain tissue chemistry and intracranial pressure (ICP) during a 20h period before and after PDT. Different microdialysis parameters (lactate, pyruvate, lactate pyruvate ratio (LPR), glycerol and glutamate) and values of ICP, cerebral perfusion pressure (CPP) and brain tissue oxygenation (PBrO2) were recorded per hour...
May 10, 2017: Clinical Neurology and Neurosurgery
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