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Launey Yoann Y CHU de Rennes, Anesthesiology & Critical Care, 2, rue Henri Le Guilloux, Rennes, France, 35033, +33 299 285 485, +33 299 282 559, Inserm, UMR991 - team2, Rennes, France ; - - 2013
The measurement of ocular nerve sheath diameter (ONSD) via ocular ultrasound scanning is a recent non-invasive method for intracranial pressure (ICP) assessment. Few clinical studies have assessed ONSD variations during osmotherapy for the treatment of sustained increased ICP episodes. The aim of our study was to determine the rate of ...
Andersen Johnny Dohn Holmgren JD From the Department of Anaesthesiology, University of Copenhagen, Glostrup Hospital, Glostrup, - - 2013
Near-infrared spectroscopy (NIRS) has been used to study regional cerebral blood oxygen saturation (rScO2) in patients in the prone position. We aimed to test the hypothesis that head rotation more than 45° would affect the rScO2. A prospective, controlled, single cohort study. University Hospital specialising in spinal surgery. Fifty-two patients ...
Imam Ayesha M - - 2013
Combination of traumatic brain injury (TBI) and hemorrhagic shock (HS) can result in significant morbidity and mortality. We have previously shown that early administration of fresh frozen plasma (FFP) in a large animal model of TBI and HS reduces the size of the brain lesion as well as the associated ...
Böhm Matthias M CIML Group, Department of Biophysics, University of Regensburg, 93040 Regensburg, Germany and Department of Neurosurgery, University Hospital Regensburg, 93042 Regensburg, - - 2013
Recently, a mathematical model of the basic physiological processes regulating the cerebral perfusion and oxygen supply was introduced [Jung et al., J. Math. Biol. 51, 491 (2005)]. Although this model correctly describes the interdependence of arterial blood pressure (ABP) and intracranial pressure (ICP), it fails badly when it comes to ...
Kirkman M A - - 2013
Measurement of intracranial pressure (ICP) and mean arterial pressure (MAP) is used to derive cerebral perfusion pressure (CPP) and to guide targeted therapy of acute brain injury (ABI) during neurointensive care. Here we provide a narrative review of the evidence for ICP monitoring, CPP estimation, and ICP/CPP-guided therapy after ABI. ...
Rao Vidar - - 2013
Cerebral perfusion pressure (CPP) is defined as the difference between the mean arterial pressure (MAP) and the intracranial pressure (ICP). However, since patients with traumatic brain injury (TBI) are usually treated with head elevation, the recorded CPP values depends on the zero level used for calibration of the arterial blood ...
Deng Wenjun - - 2013
Postural orthostatic tachycardia syndrome (POTS) is common, and has a serious impact on children's quality of life. Midodrine hydrochloride, an α1-adrenoreceptor agonist, is an effective treatment. The study was designed to examine the therapeutic efficacy of midodrine hydrochloride by quantifying changes in blood pressure during the head-up test (HUT), in ...
Varsos Georgios V - - 2013
Reducing cerebral perfusion pressure (CPP) below the lower limit of autoregulation (LLA) causes cerebral blood flow (CBF) to become pressure passive. Further reductions in CPP can cause cessation of CBF during diastole. We hypothesized that zero diastolic flow velocity (FV) occurs when diastolic blood pressure becomes less than the critical ...
Kako Hiromi - - 2013
Over the past few years, there has been a change in clinical practice with a transition to the use of cuffed instead of uncuffed endotracheal tubes (ETTs) in pediatric patients. These changes have led to concerns regarding unsafe intracuff pressures in pediatric patients, which may result in postoperative morbidity. To ...
Caricato Anselmo - - 2013
Endotracheal suctioning (ETS) is essential for patient care in an ICU but may represent a cause of cerebral secondary injury. Ketamine has been historically contraindicated for its use in head injury patients, since an increase of intracranial pressure (ICP) was reported; nevertheless its use was recently suggested in neurosurgical patients. ...
Delgado Cherlene C Department of Surgical Sciences, School of Veterinary Medicine, 2015 Linden Drive, Madison, WI 53706, USA. - - 2014
To evaluate feasibility and accuracy of intraocular pressure (IOP) measurement by rebound tonometry in adult red-eared slider turtles and determine the effects of manual and chemical restraint on IOP. Seventeen adult red-eared slider turtles. Intraocular pressure was measured with TonoLab® and TonoVet® tonometers in conscious, unrestrained turtles. To evaluate the ...
Freimann Florian Baptist - - 2013
The Neurovent-P-tel sensor is a promising device for telemetric intracranial pressure (ICP) measurements in cases of complex hydrocephalus. Data on its accuracy within a broad ICP range are missing. We applied a porcine model for large-scale manipulation of the ICP values. The telemetric ICP sensor was referenced against ICP values ...
de Andrade Ozahyr - - 2013
The autonomic nervous system is importantly involved in the maintenance of arterial pressure during orthostatic challenges. However, little is known about the specific central areas involved in these cardiovascular compensations. It has been proposed that the paraventricular nucleus of the hypothalamus (PVN) is involved in cardiovascular reflex responses related to ...
Nguyen Tammy T - - 2013
To report a case of sustained hypotension associated with the use of intravenous metoclopramide. A 50-year-old woman developed a hypotensive episode lasting approximately 90 minutes after the administration intravenous metoclopramide for the treatment of a migraine. The patient presented to the emergency department after she woke up with a severe ...
Stiebel-Kalish H - - 2013
Idiopathic intracranial hypertension is a common disorder affecting mainly healthy, young, overweight women. The pathogenesis of this condition is unknown, but it has been shown to follow treatment with several compounds including corticosteroids and vitamin A derivatives. This paper will offer a novel hypothesis and insight on the pathogenesis of ...
Zhang Minmin - - 2013
Pressure retarded osmosis (PRO) is an osmotically-driven membrane process that can be used to harvest salinity-gradient power. The PRO performance (both water flux and power density) can be severely limited by membrane fouling. The current study, for the first time, investigates PRO scaling in a bench-scale pressurized system using calcium ...
Lancioni Giulio E - - 2013
Objective: To assess whether a man with amyotrophic lateral sclerosis could benefit from using (a) a mouth pressure microswitch instead of an optic microswitch activated via head movement and (b) a special word prediction function within a text messaging system. Method: Initially, both microswitches were used for operating the text ...
Siebenmann Christoph C Center for Integrative Human Physiology, Institute of Physiology, University of Zurich Zurich, - - 2013
During acute altitude exposure tachycardia increases cardiac output (Q) thus preserving systemic O2 delivery. Within days of acclimatization, however, Q normalizes following an unexplained reduction in stroke volume (SV). To investigate whether the altitude-mediated reduction in plasma volume (PV) and hence central blood volume (CBV) is the underlying mechanism we ...
Ferreira Lucas Lima - - 2013
Objective: To analyze the outcomes of increased or decreased intracranial pressure and/or the decrease in cerebral perfusion pressure resulting from respiratory physiotherapy on critically ill patients admitted to the intensive care unit. Methods: Through a systematic review of the literature, clinical trials published between 2002 and 2012 were selected. The ...
Kristiansson Helena H Department of Neurosurgery, University Hospital of Lund, Lund, - - 2013
Elevated intracranial pressure (ICP) is an important cause of secondary brain injury, and a measurement of ICP is often of crucial value in neurosurgical and neurological patients. The gold standard for ICP monitoring is through an intraventricular catheter, but this invasive technique is associated with certain risks. Intraparenchymal ICP monitoring ...
Tang Sung-Chun - - 2013
Mannitol is commonly used in patients with increased intracranial pressure (ICP), but its effect on cerebrovascular pressure reactivity (CVPR) is uncertain. We analyzed the changes of pressure reactivity index (PRx) during the course of mannitol treatment. Twenty-one patients who received mannitol treatment for increased ICP were recruited prospectively. Continuous waveforms ...
Dias Celeste - - 2013
Plateau waves are common in traumatic brain injury. They constitute abrupt increases of intracranial pressure (ICP) above 40 mmHg associated with a decrease in cerebral perfusion pressure (CPP). The aim of this study was to describe plateau waves characteristics with multimodal brain monitoring in head injured patients admitted in neurocritical care. ...
Larsen Rikke Hebo - - 2013
To investigate the neuroprotective potential of ciclosporin during acute liver failure. We evaluated the effect of intrathecally administered ciclosporin on intracranial pressure, brain water content and aquaporin-4 expression in a rat model with acute hyperammonaemia. Twenty-four male Wistar rats with portacaval anastomosis were randomised into four groups receiving ciclosporin or ...
Ogawa Yuki - - 2013
Abstract Purpose: To develop a new structure and function of alternating pressure air mattress (APAM) which reduces discomfort during head-of-bed (HOB) elevation and evaluate the effectiveness. Method: An observational study (Study 1) and randomized crossover experiment (Study 2) were conducted in healthy adult volunteers. External force (interface pressure and shear ...
Wang Sheng-Hao - - 2013
The study was conducted to achieve early detection of increased compartment pressure by comparing the changes between the thickness and pressure within the musculofascial compartments after lower leg injury. We included cases of a lower-leg fracture between January and December 2007. Bilateral lower leg compartment pressure and thickness were measured ...
Cremer Antoine - - 2013
We validated against invasive measurements a measure of central SBP based on the QKD interval. The present objective is a comparison to the SphygmoCor device. A first cohort was used to redefine an algorithm for estimating ascending aorta SBP (cSBP) with respect to SphygmoCor. This algorithm was then tested in ...
Xia Huijing - - 2013
Rationale: Over-activity of the brain Renin Angiotensin System (RAS) is a major contributor to neurogenic hypertension. While over-expression of Angiotensin-Converting Enzyme type 2 (ACE2) has been shown to be beneficial in reducing hypertension by transforming Angiotensin (Ang)-II into Ang-(1-7), several groups have reported decreased brain ACE2 expression and activity during ...
Rostami Elham - - 2013
Modulation in ventilatory settings is one of the approaches and interventions used to treat and prevent secondary brain damage after traumatic brain injury (TBI). Here we investigate the effect of hyperoxia in combination with hypoventilation on brain oxygenation, metabolism and intracranial pressure. Twelve pigs were divided into three groups; group1-100% ...
Marchi Andrea - - 2013
It is unknown whether modified head-up tilt (MTILT) with inclination of the back rest, thigh rest and shank rest of 60, 0 and 15° respectively challenges autonomic control as assessed from beat-to-beat variability of heart period (HP) and systolic arterial pressure (SAP). In 15 healthy adult humans we found that ...
Olson Daiwai M - - 2013
Background Intracranial pressure is a frequent target for goal-directed therapy to prevent secondary brain injury. In critical care settings, nurses deliver many interventions to patients having intracranial pressure monitored, yet few data documenting the immediate effect of these interventions on intracranial pressure are available. Objective To examine the relationship between ...
Andresen Morten - - 2013
Object Intracranial pressure (ICP) monitoring is used extensively in clinical practice, and as such, the accuracy of registered ICP values is paramount. Clinical observations of nonphysiological changes in ICP have called into question the accuracy of registered ICP values. Subsequently, the authors have tried to determine if the ICP monitors ...
Schaeffer Anne Marie J - - 2013
We studied the pressure-induced superconductivity of BaLi4 up to 53 GPa by means of electrical resistivity in a diamond anvil cell. Superconductivity in BaLi4 is first observed at a pressure of 5.4 GPa with a superconducting critical temperature (Tc) of 4.5 K. Below 2 GPa, superconductivity is not observed above the minimum temperature achievable ...
Nwachuku Enyinna L - - 2013
There is clinical equipoise regarding whether neurointensive care unit management of external ventricular drains (EVD) in severe traumatic brain injury (TBI) should involve an open EVD, with continuous drainage of cerebrospinal fluid (CSF), versus a closed EVD, with intermittent opening as necessary to drain CSF. In a matched cohort design, ...
Skoglund Karin - - 2013
The neurological wake-up test (NWT) is used to monitor the level of consciousness in patients with traumatic brain injury (TBI). However, it requires interruption of sedation and may elicit a stress response. We evaluated the effects of the NWT using cerebral microdialysis (MD), brain tissue oxygenation (PbtiO2), jugular venous oxygen ...
Boltz Agnes - - 2013
In the choroid, there is evidence that blood flow does not only depend on ocular perfusion pressure (OPP), but also on absolute mean arterial pressure (MAP) and intraocular pressure (IOP). The present study included 40 healthy subjects to investigate whether such behavior is also found in the optic nerve head ...
Younan Youliana - - 2013
Purpose: Low-intensity focused ultrasound has been shown to stimulate the brain noninvasively and without noticeable tissue damage. Such a noninvasive and localized neurostimulation is expected to have a major impact in neuroscience in the coming years. This emerging field will require many animal experiments to fully understand the link between ...
Lee Sungjoon - - 2013
Presented here is a 36-year-old male with arterial hypertension who developed brainstem edema and intracranial hemorrhage. Magnetic resonance scan revealed diffuse brainstem hyperintensity in T2-weighted and fluid-attenuated inversion-recovery images, with an increase in apparent diffusion coefficient values. After a reduction in blood pressure, rapid resolution of the brainstem edema was ...
Jadischke Ron R Department of Biomedical Engineering, Wayne State University, Detroit, MI 48201, - - 2013
On-field measurement of head impacts has relied on the Head Impact Telemetry (HIT) System, which uses helmet mounted accelerometers to determine linear and angular head accelerations. HIT is used in youth and collegiate football to assess the frequency and severity of helmet impacts. This paper evaluates the accuracy of HIT ...
Balou Matina - - 2013
The primary aim of this study was to investigate the immediate effects of partial versus complete head rotation and chin tuck on pharyngeal swallowing pressures and durations in the pharynx and UES of normal, healthy adults. Ten individuals (3 men and 7 women; age range 54-76 years) served as participants. Solid-state ...
Vrettou Charikleia S - - 2013
In acute respiratory distress syndrome (ARDS) combined high-frequency oscillation (HFO) and tracheal gas insufflation (TGI) improves gas-exchange compared to conventional mechanical ventilation (CMV). We evaluated the effect of HFO-TGI on PaO2/fractional inspired O2 (FiO2) and PaCO2, systemic hemodynamics, intracranial pressure (ICP), and cerebral perfusion pressure (CPP) in patients with traumatic ...
Ravid Sarit - - 2013
Pseudotumor cerebri or idiopathic intracranial hypertension is characterized by normal spinal fluid composition and increased intracranial pressure in the absence of a space-occupying lesion. This study describes a subgroup of 10 patients with the same typical presenting symptoms (headache, vomiting, and papilledema) but without nuchal rigidity, meningeal signs, or change ...
Haubrich Christina - - 2013
To anticipate an increase in intra-cranial pressure (ICP), information about pressure-volume (p/v) compliance is required. ICP monitoring often fails at this task after head injury. Could a test that transiently shifts intra-cranial blood volume produce consistent information about the p/v relationship? Doppler flow velocities in the middle cerebral arteries (left: 80.8 ± 34.7 cm/s; ...
Cecchetti C - - 2013
Background: Currently there is no clear evidence of how changes in hemodynamic parameters are involved in the onset of neurogenic pulmonary edema. Aim of the study has been to correlate the principal variations of the intracranial pressure and volumetric hemodynamic parameters with the variations of extravascular lung water following severe ...
Scott Jonathan P R - - 2013
Repeated exposure to +Gz acceleration provokes cardiovascular adaptations of potential benefit to pilots' +Gz tolerance, but whether such changes actually improve human tolerance to +Gz acceleration is uncertain. This study assessed +Gz tolerance before and after repeated exposure to +Gz at two different intensities as the role of frequency of ...
Weenink Robert P RP Diving Medical Center, Royal Netherlands Navy, Den Helder, The Netherlands. - - 2013
Hyperbaric oxygenation is the accepted treatment for cerebral arterial gas embolism. Although earlier start of hyperbaric oxygenation is associated with better outcome, it is unknown how much delay can be tolerated before start of hyperbaric oxygenation. This study investigates the effect of hyperbaric oxygenation on cerebral function in swine when ...
Rickard A C - - 2013
Rising intracranial pressure (ICP) is a poor prognostic indicator in traumatic brain injury (TBI). Both mannitol and hypertonic sodium solutions are used to treat raised ICP in patients with TBI. This meta-analysis compares the use of mannitol versus hypertonic sodium solutions for ICP control in patients with TBI. Randomised clinical ...
Beauchet Olivier - - 2013
High blood pressure (BP) levels may be associated with brain volume reduction and may contribute to brain atrophy in key brain regions involved in cognition and susceptible to neurodegeneration in Alzheimer's disease. The purpose of this work was to systematically review and quantitatively synthesize the association of BP levels with ...
Brockman Erik C EC Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3434 Fifth Avenue, Pittsburgh, PA 15260, - - 2013
Polynitroxylated-pegylated hemoglobin (PNPH), a bovine hemoglobin decorated with nitroxide and polyethylene glycol moieties, showed neuroprotection vs. lactated Ringer's (LR) in experimental traumatic brain injury plus hemorrhagic shock (TBI+HS). Resuscitation with PNPH will reduce intracranial pressure (ICP) and brain edema and improve cerebral perfusion pressure (CPP) vs. LR in experimental TBI+HS. ...
Asgari Shadnaz - - 2013
BACKGROUND: Although abnormally high Lactate/Pyruvate ratio (LPR) could indicate cerebral ischemia for brain injury patients, there is a debate on what is primary factor responsible for LPR increase. METHODS: A data analysis experiment is taken to test whether any association between cerebral vasodilatation/vasoconstriction and LPR increase exists. We studied 4,316 ...
Selvan Veera - - 2013
Blast waves generated in the field explosions impinge on the head-brain complex and induce mechanical pressure pulses in the brain resulting in traumatic brain injury. Severity of the brain injury (mild to moderate to severe) is dependent upon the magnitude and duration of the pressure pulse, which in turn depends ...
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