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Eide Per Kristian - - 2014
Monitoring of intracranial pressure (ICP) is a cornerstone in the surveillance of neurosurgical patients. The ICP is measured against a baseline pressure (i.e. zero - or reference pressure). We have previously reported that baseline pressure errors (BPEs), manifested as spontaneous shift or drifts in baseline pressure, cause erroneous readings of ...
Blankstein Michael M AO Research Institute Davos, Davos, - - 2014
The benefits of cement augmentation with fixation of osteoporotic pertrochanteric fractures have been previously demonstrated. The objective of this study was threefold: 1. Quantify the intra-osseous pressure produced during cement augmentation of the perforated PFNA blades. 2. Assess whether the pressure generated is influenced by the injection rate. 3. Assess ...
Lauerman Margaret H MH Program in Trauma, University of Maryland School of Medicine, Baltimore, Maryland, - - 2014
Intracranial pressure (ICP) control is a mainstay of traumatic brain injury (TBI) management. However, development of intracranial hypertension (ICH) may be affected by factors outside of the cranial vault in addition to the local effects of the TBI. This review will examine the pathophysiology of multiple compartment syndrome (MCS) and ...
Karamanos Efstathios E Division of Acute Care Surgery (Trauma, Emergency Surgery, and Surgical Critical Care), University of Southern California-Keck School of Medicine, Los Angeles County General Hospital (LAC + USC), 2051 Marengo Street, C5L100, Los Angeles, CA 90033-4525, USA. Electronic address: - - 2014
Intracranial pressure (ICP) monitoring is a standard of care in severe traumatic brain injury when clinical features are unreliable. It remains unclear, however, whether elevated ICP or decreased cerebral perfusion pressure (CPP) predicts outcome. This is a prospective observational study of patients sustaining severe blunt head injury, admitted to the ...
Fujita Yasuki Y Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, - - 2014
Data on intraoperative secondary insults in pediatric traumatic brain injury (TBI) are limited. We examined intraoperative secondary insults during extracranial surgery in children with moderate-severe TBI and polytrauma and their association with postoperative head computed tomography (CT) scans, intracranial pressure (ICP), and therapeutic intensity level (TIL) scores 24 h after surgery. ...
Ragauskas Arminas - - 2014
Objectives: To compare the diagnostic reliability of optic nerve sheath diameter (ONSD) ultrasonography with a transcranial Doppler (TCD)-based absolute intracranial pressure (ICP) value measurement method for detection of elevated ICP in neurological patients. The ONSD method has been only tested previously on neurosurgical patients. Methods: A prospective clinical study of ...
Kranz P G PG Department of Radiology, Duke University Medical Center, Durham, North Carolina; and Department Radiology and Radiological Science, Medical University of South Carolina, Charleston, South - - 2014
SUMMARY:Rebound intracranial hypertension is a complication of epidural blood patching for treatment of intracranial hypotension characterized by increased intracranial pressure, resulting in potentially severe headache, nausea, and vomiting. Because the symptoms of rebound intracranial hypertension may bear some similarity to those of intracranial hypotension and literature reports of rebound intracranial ...
Lizy Christelle C Christelle Lizy is a registered nurse, Dirk Vogelaers, Koenraad Vandewoude, and Stijn Blot are professors in the Department of Internal Medicine, Faculty of Medicine and Healthcare, Ghent University, Ghent, Belgium. Walter Swinnen is an intensivist and director of the intensive care unit, General Hospital Sint Blasius, Dendermonde, Belgium, Sonia Labeau is a lecturer in the Faculty of Education, Health and Social Work, University College Ghent, Ghent, Belgium, and Jan Poelaert is director of the Department of Anesthesiology, Free University Brussels, Brussels, Belgium. Joel Dulhunty is an intensivist in the Department of Intensive Care Medicine, Royal Brisbane and Women's Hospital, and the Burns, Trauma and Critical Care Research Centre, University of Queensland, Brisbane, - - 2014
Background In order to avoid microaspiration and tracheal injury, the target for endotracheal tube cuff pressure is 20 to 30 cm H2O. Objective To assess the effect of changes in body position on cuff pressure in adult patients. Methods Twelve orally intubated and sedated patients received neuromuscular blockers and were ...
Kasapas Konstantinos K Department of Neurosurgery, Athens General Hospital "G. Gennimatas", 11527 Athens, - - 2014
Introduction. An experimental epidural hematoma model was used to study the relation of ultrasound indices, namely, transcranial color-coded-Doppler (TCCD) derived pulsatility index (PI), optic nerve sheath diameter (ONSD), and pupil constriction velocity (V) which was derived from a consensual sonographic pupillary light reflex (PLR) test with invasive intracranial pressure (ICP) ...
Atsumi Hideki - - 2014
Objective: To assess a newly proposed noninvasive technique for evaluating intracranial pressure (ICP) index and brain compliance (BC) index based on an inverse analysis of a brain-circulation-equivalent electrical circuit (EC) model, in which cerebrospinal fluid (CSF) flow and arterial flow rates measured by using the phase contrast method are used ...
Lang Georgina E GE Mathematical Institute, University of Oxford, , Oxford, - - 2014
Brain tissue swelling is a dangerous consequence of traumatic injury and is associated with raised intracranial pressure and restricted blood flow. We consider the mechanical effects that drive swelling of brain tissue slices in an ionic solution bath, motivated by recent experimental results that showed that the volume change of ...
Erbabacan Emre E Istanbul University Cerrahpasa Medical Faculty, Department of Anaesthesiology and Reanimation, Fatih, - - 2014
Right internal jugular vein (RIJV) catheterisation is a common procedure in patients undergoing surgery. We aimed to compare diameters and the cross-sectional area (CSA) of the RIJV when the head is in a neutral or 30-degree rotated position during mechanical ventilation in various modes and spontaneous ventilation. Thirty patients undergoing ...
Song Zhiming Z Department of Cardiac Surgery, Peking University Third Hospital, Beijing, China - - 2014
Background The aim of this study was to determine the hemodynamic effects of various support modes of continuous flow left ventricular assist devices (CF-LVADs) on the cardiovascular system using a numerical cardiovascular system model. Material and Methods Three support modes were selected for controlling the CF-LVAD: constant flow mode, constant ...
Toksvang Linea Natalie LN Centre of Inflammation and Metabolism, University Hospital of Copenhagen, Copenhagen Ø, - - 2014
Summary We report a case of cerebral aspergilloma in a 25-year-old immunoincompetent man admitted to a general intensive care unit. Monitoring of intracranial pressure was instigated and revealed hour-long epochs of severe intracranial hypertension, despite a normal opening pressure, with decreases in cerebral perfusion pressure. We documented that this was ...
Hawthorne Christopher C Clinical Lecturer, Academic Unit of Anaesthesia, Pain and Critical Care Medicine, University of Glasgow , Glasgow , - - 2014
Since Monro published his observations on the nature of the contents of the intracranial space in 1783, there has been investigation of the unique relationship between the contents of the skull and the intracranial pressure (ICP). This is particularly true following traumatic brain injury (TBI), where it is clear that ...
Revuelta-Iniesta R R Department of Dietetics, Nutrition and Biological Sciences, Queen Margaret University, Queen Margaret University Drive, Musselburgh, East Lothian, Edinburgh EH21 6UU, - - 2014
Dietary polyphenols may have a protective role against the development of CVD. Thus, we aimed to investigate the effects of green coffee (GC), rich in chlorogenic acid, and black coffee (BC) on cardiovascular markers. A randomised pilot crossover study was performed on healthy subjects who consumed both coffees for 2 ...
Monori-Kiss Anna A Institute of Human Physiology and Clinical Experimental Research, Semmelweis University, Budapest, - - 2014
Dietary quercetin improves cardiovascular health, relaxes some vascular smooth muscle and has been demonstrated to serve as a substrate for the cyclooxygenase enzyme. 1. To test quantitatively a potential direct vasodilatory effect on intramural coronary resistance artery segments, in different concentrations. 2. To scale vasorelaxation at different intraluminal pressure loads ...
Chen Baoming B School of Biological and Medical Engineering Beihang University, 37 Xueyuan Rd, Hai Dian District, Beijing 100191, China School of Physics & Electronic Engineering, Shanxi University, 92 Wucheng Rd, Xiao Dian District, Taiyuan 030006, - - 2014
Non-invasive pressure simulators that regenerate oscillometric waveforms promise an alternative to expensive clinical trials for validating oscillometric noninvasive blood pressure devices. However, existing simulators only provide oscillometric pressure in cuff and thus have a limited accuracy. It is promising to build a physical simulator that contains a synthetic arm with ...
Koyama Masahiro M Department of Bioscience and Biotechnology, Faculty of Agriculture, Shinshu University, Minamiminowa Village, Nagano, - - 2014
Neo-fermented buckwheat sprouts (neo-FBS) contain angiotensin-converting enzyme (ACE) inhibitors and vasodilators with blood pressure-lowering (BPL) properties in spontaneously hypertensive rats (SHRs). In this study, we investigated antihypertensive mechanisms of six BPL peptides isolated from neo-FBS (FBPs) by a vasorelaxation assay and conventional in vitro, in vivo, and a new ex ...
Ran Zengling Z Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. - - 2014
Laser-machined microcavities for simultaneous measurement of high-temperature and high-pressure are demonstrated. These two cascaded microcavities are an air cavity and a composite cavity including a section of fiber and an air cavity. They are both placed into a pressure chamber inside a furnace to perform simultaneous pressure and high-temperature tests. ...
Cagatay Halil Huseyin HH Department of Ophthalmology, Faculty of Medicine, Kafkas University, Merkez, 36100 Kars, - - 2014
Aqueous outflow via the conventional outflow pathway is dependent on the pressure gradient between intraocular pressure (IOP) and episcleral venous pressure (EVP). Elevated IOP resulting from increased EVP is a well-known complication of arteriovenous fistulas, which are usually between the carotid artery and the cavernous sinus. Arteriovenous malformations usually occur ...
Lynn Christopher Dana CD Department of Anthropology, University of Alabama, Tuscaloosa, AL, - - 2014
The importance of fire in human evolutionary history is widely acknowledged but the extent not fully explored. Fires involve flickering light, crackling sounds, warmth, and a distinctive smell. For early humans, fire likely extended the day, provided heat, helped with hunting, warded off predators and insects, illuminated dark places, and ...
Finsen Alexandra Vanessa AV Research Institute of Internal Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway; Department of Cardiology, Oslo University Hospital Rikshospitalet, Oslo, Norway; Center for Heart Failure Research, University of Oslo, Oslo, - - 2014
CCL21 acting through CCR7, is termed a homeostatic chemokine. Based on its role in concerting immunological responses and its proposed involvement in tissue remodeling, we hypothesized that this chemokine could play a role in myocardial remodeling during left ventricular (LV) pressure overload. Our main findings were: (i) Serum levels of ...
Totosy de Zepetnek Julia O JO Department of Kinesiology, McMaster University, Hamilton, Ontario, - - 2014
In animal and in-vitro models, increased oscillatory shear stress characterized by increased retrograde shear-rate (SR) is associated with acutely decreased endothelial cell function. While previous research suggests a possible detrimental role of elevated retrograde SR on endothelial-function in the brachial artery in humans, little research has been conducted examining arteries ...
Akinyi Mary M Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Ministry of Education, Tianjin University of Traditional Chinese Medicine Tianjin 300193, China ; Tianjin Key Laboratory of Traditional Chinese Medicine Pharmacology, Tianjin, University of Traditional Chinese Medicine Pharmacology Tianjin 300193, China ; Tianjin State Key Laboratory of Modern Chinese Medicine Tianjin 300193, - - 2014
The vascular relaxation action of Eucommiae Ulmoides Oliv. also known as Duzhong has been seen on arteries of the heart such as the aorta and the coronary artery which are elastic in nature. Duzhong is historically an active ingredient commonly used in hypertensive herbal prescriptions in China. This work investigated ...
Reisner Andrew A Massachusetts General Hospital, Department of Emergency Medicine, Boston, Massachusetts, United States ; - - 2013
We hypothesized that vital signs could be used to improve the association between a trauma patient's prehospital Glasgow coma scale (GCS) score and his or her clinical condition. Previously, abnormally low and high blood pressures have both been associated with higher mortality for patients with traumatic brain injury (TBI). We ...
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 ...
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