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Culp William C WC Jr From the Department of Anesthesiology, Texas A&M University Health Science Center College of Medicine, Scott & White Hospital, Temple, - - 2014
Operating room fires are sentinel events that present a real danger to surgical patients and occur at least as frequently as wrong-sided surgery. For fire to occur, the 3 points of the fire triad must be present: an oxidizer, an ignition source, and fuel source. The electrosurgical unit (ESU) pencil ...
Marmarelis V Z VZ Department of Biomedical Engineering & Biomedical Simulations Resource, University of Southern California, United States. Electronic address: - - 2014
In our previous studies, we have introduced model-based "functional biomarkers" or "physiomarkers" of cerebral hemodynamics that hold promise for improved diagnosis of early-stage Alzheimer's disease (AD). The advocated methodology utilizes subject-specific data-based dynamic nonlinear models of cerebral hemodynamics to compute indices (serving as possible diagnostic physiomarkers) that quantify the state ...
Noori Shahab S Division of Neonatology and the Center for Fetal and Neonatal Medicine, Department of Pediatrics, Children's Hospital Los Angeles and the LAC+USC Medical Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, United - - 2014
High arterial carbon dioxide (PaCO2 ) and cerebral reperfusion are associated with peri/intraventricular haemorrhage. Our aim was to study the relationship between PaCO2 and cerebral blood flow (CBF) in preterm infants during postnatal transition. We prospectively studied ≤30 weeks' gestation haemodynamically stable preterm infants during the first three postnatal days ...
Caputi Luigi L Department of Cerebrovascular Diseases, Fondazione IRCCS Neurological Institute C. Besta, Via Celoria 11, 20133 Milan, Italy. Electronic address: - - 2014
Assessment of cerebrovascular reactivity (CVR) is essential in cerebrovascular diseases, as exhausted CVR may enhance the risk of cerebral ischemic events. Transcranial Doppler (TCD) with a vasodilatory stimulus is currently used for CVR evaluation. Scanty data are available for Quantitative Magnetic Resonance Angiography (QMRA), which supplies higher spatial resolution and ...
Belenkiy Slava M SM 1United States Army Institute of Surgical Research, Fort Sam Houston, Texas 2San Antonio Military Medical Center, Fort Sam Houston, - - 2014
Hemorrhagic shock (HS) is a setting in which both pulmonary and cutaneous perfusion may be impaired. The goals of this study were (1) to evaluate the relationship between end-tidal (etCO2), transcutaneous (tPCO2), arterial carbon dioxide (PaCO2), and lactate during lethal HS; and (2) to assess the effect of progressive HS ...
Strohm J J Department of Medical and Life Sciences, Hochschule Furtwangen University, - - 2014
Cerebrovascular reactivity (CVR) assesses the ability of the cerebral vasculature to adjust cerebral blood flow in response to changes in arterial carbon dioxide (CO2), and is used as an indicator of cerebrovascular health. A common method of estimating CVR is to measure the increase in blood flow velocity of the ...
Scaravilli Vittorio V *) U.S. Army Institute of Surgical Research, Fort Sam Houston, San Antonio TX, USA †) Department of Experimental Medicine, University Milano-Bicocca, Monza (MB), Italy ‡) Department of Perioperative Medicine and Intensive Care, San Gerardo Hospital, Monza (MB), Italy §) Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany ¶) Pediatric Department, University Hospital Bonn, Bonn, Germany &) San Antonio Military Medical Center, San Antonio TX, - - 2014
The combination of extracorporeal carbon dioxide removal (ECCO2R) and hemofiltration is a possible therapeutic strategy for patients needing both lung and renal support. We tested the effects of the recirculation of ultrafiltrate on membrane lung (ML) CO2 removal (VCO2ML).Three conscious, spontaneously breathing sheep were connected to a commercially produced ECCO2R ...
Kamath Rahul R - - 2014
Three-dimensional (3D) carbon interdigitated electrode arrays (IDEAs) were fabricated using inexpensive, conventional, UV photolithography of SU-8 with modified exposure and post exposure bake settings followed by pyrolysis in an inert environment. The sensor performance was investigated as a function of both the IDEA digit width/gap ratio and digit height under ...
Battilocchio Claudio C Innovative Technology Centre, Department of Chemistry, University of Cambridge , Lensfield Road, CB2 1EW, Cambridge - - 2014
A sustainable flow chemistry process for the hydration of nitriles, whereby an aqueous solution of the nitrile is passed through a column containing commercially available amorphous manganese dioxide, has been developed. The product is obtained simply by concentration of the output stream without any other workup steps. The protocol described ...
Pereira A D AD Departamento de Nutrição, Universidade Federal do Tocantins, CEP, 77001-090 Palmas, TO, - - 2014
The proximate composition and color of mortadellas containing carbon monoxide-treated (COTB), untreated (UNTB), or CO-treated dried blood (CODB) were compared to that of control mortadella. Blood addition did not affect (P>0.05) the proximate composition and TBARS. The mortadella containing 10% UNTB were brown and those containing COTB or CODB were ...
Song Yongchen Y Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, Liaoning 116024 - - 2014
The objective of this study was to understand fluid flow in porous media. Understanding of fluid flow process in porous media is important for the geological storage of CO2. The high-resolution magnetic resonance imaging (MRI) technique was used to measure fluid flow in a porous medium (glass beads BZ-02). First, ...
Zanella Alberto A From the Dipartimento di Scienze della Salute, Università di Milano-Bicocca, Ospedale San Gerardo Nuovo dei Tintori, Monza, Italy (A.Z., P.M., S.R., V.S., M.G., D.F., N.P., and A.P.); Dipartimento di Patologia animale, Igiene e Sanità pubblica veterinaria, sez. di Biochimica e Fisiologia, Università degli studi di Milano, Milan, Italy (F.P. and M.A.); and Dipartimento di Scienze Farmacologiche e Biomolecolari (DiSFeB), Scuola di Scienze del Farmaco, Università degli studi di Milano, Milan, Italy - - 2014
Extracorporeal carbon dioxide removal has been proposed to achieve protective ventilation in patients at risk for ventilator-induced lung injury. In an acute study, the authors previously described an extracorporeal carbon dioxide removal technique enhanced by regional extracorporeal blood acidification. The current study evaluates efficacy and feasibility of such technology applied ...
Kennedy Rr R Department of Anaesthesia, Christchurch Hospital, Christchurch, New - - 2014
Reducing fresh gas flow (FGF) rates with volatile anaesthetics reduces waste, with positive financial and environmental consequences. We have audited FGF since 2001 by analysis of data collected from anaesthetic machines. We recently introduced Aisys(®) (GE Healthcare, Madison, WI, USA) machines that allow automated control of end-tidal levels of volatile ...
Blässer Katharina K Institute of Legal Medicine, Julius-Maximilians-Universität Würzburg, Versbacher Straße 3, 97078 Würzburg, Germany. Electronic address: - - 2013
The presented case deals with an unusual suicide by carbon monoxide poisoning. In a car parked in a highway rest area, the body of a middle-aged man was found. In the open trunk of the car there was a gas-powered generator which was switched on, but no longer running. The ...
Zanella Alberto A Dipartimento di Scienze della Salute, Università di Milano-Bicocca, Ospedale San Gerardo Nuovo dei Tintori, Monza, - - 2013
Extracorporeal (EC) carbon dioxide (CO2) removal (ECCO2R) may be a powerful alternative to ventilation, possibly avoiding the need for mechanical ventilation and endotracheal intubation. We previously reported how an infusion of lactic acid before a membrane lung (ML) effectively enhances ECCO2R. We evaluated an innovative ECCO2R technique based on ventilation ...
Fan Jui-Lin JL 1University of - - 2013
The present study is the first to examine the effect of high altitude acclimatisation and re-exposure on the responses of cerebral blood flow and ventilation to CO2. We also compared the steady-state estimates of these parameters during acclimatisation with the modified rebreathing method. We assessed changes in steady state responses ...
Desebbe Olivier O Department of Anesthesiology and Intensive Care; Laboratory EA4169, Louis Pradel Hospital, Claude Bernard Lyon 1 University, Lyon, France. Electronic address: - - 2013
To test whether the variations of tissue hemoglobin concentration (∆THb) measured by the FORE-SIGHT(TM) cerebral oximeter can accurately detect changes in arterial hemoglobin concentration (∆AHb) before, during, and after cardiopulmonary bypass. A prospective clinical study. Cardiac surgery operating room. Thirty patients scheduled for cardiac surgery. Tissue hemoglobin concentration (THb) was ...
Lindholm L - - 2013
Gas microembolisation is an identified risk in cardiac surgery. Flooding the wound with carbon dioxide is a method proposed to reduce this problem. The high solubility of carbon dioxide is beneficial, but may also cause problems. The gas solubility diminishes at warming and endogenous bubbles are formed when cold blood ...
Chowdhury Md Albarune - - 2013
Aeration is an important factor influencing CO2, CH4, N2O and NH3 emissions from the composting process. Both CH4 and N2O are potent greenhouse gases (GHG) of high importance. Here, we examined the effects of high and low aeration rates together with addition of barley straw with and without bio-char on ...
Bussy Cyrill - - 2013
Carbon nanotubes may enter into the bloodstream and interact with blood components indirectly via translocation following unintended exposure or directly after an intended administration for biomedical purposes. Once introduced into systemic circulation, nanotubes will encounter various proteins, biomolecules or cells which have specific roles in the homeostasis of the circulatory ...
Soleimanpour Hassan H Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, - - 2013
Metabolic acidosis confirmed by arterial blood gas (ABG) analysis is one of the diagnostic criteria for diabetic ketoacidosis (DKA). Given the direct relationship between end-tidal carbon dioxide (ETCO2), arterial carbon dioxide (PaCO2), and metabolic acidosis, measuring ETCO2 may serve as a surrogate for ABG in the assessment of possible DKA. ...
Tarafder Abhijit - - 2013
This work demonstrates the possible advantages and the challenges of accurate on-line measurements of the CO2 mass flow rate during supercritical fluid chromatography (SFC) operations. Only the mass flow rate is constant along the column in SFC. The volume flow rate is not. The critical importance of accurate measurements of ...
Beekley Matthew D - - 2013
Abstract The purpose of this study was to examine the effect of changes in capillary blood pH on the resting soleus Hoffmann (H) reflex in the intact human. H-max size, H wave at 20% of M-max, M-max, and H-reflex latency were recorded in 10 subjects (apparently healthy, ages 19 - ...
Ringer S K - - 2013
The aim of the present study was to investigate changes in blood glucose concentration ([Glu]B), acid-base status and electrolyte concentrations during constant rate infusions (CRI) of two alpha2-adrenergic agonists in seven horses treated in a blinded, randomised, crossover design with xylazine or romifidine. An intravenous (IV) bolus of xylazine (1mg/kg) ...
Fierstra Jorn - - 2013
Cerebrovascular reactivity is the change in cerebral blood flow in response to a vasodilatory or vasoconstrictive stimulus. Measuring variations of cerebrovascular reactivity between different regions of the brain has the potential to not only advance understanding of how the cerebral vasculature controls the distribution of blood flow but also to ...
Bulucu Fatih - - 2013
Abstract Blood gas analyses are needed to reveal any kind of acid-base imbalance in some patients. Traditionally, arterial punctures are performed to obtain the blood samples for blood gas analyses. Arterial puncture is not a completely safe procedure. It may cause serious problems including arterial thrombosis, arteriovenous fistula, pseudoaneurysms and ...
Bailey Damian M - - 2013
Age-related impairments in cerebral blood flow and cerebrovascular reactivity to carbon dioxide (CVRCO2) are established risk factors for stroke that respond favorably to aerobic training. The present study examined to what extent cerebral hemodynamics are improved when training is sustained throughout the adult lifespan. Eighty-one healthy males were prospectively assigned ...
Hare Hannah V - - 2013
Measurement of cerebrovascular reactivity (CVR) can give valuable information about existing pathology and the risk of adverse events, such as stroke. A common method of obtaining regional CVR values is by measuring the blood flow response to carbon dioxide (CO2)-enriched air using arterial spin labeling (ASL) or blood oxygen level-dependent ...
Jeon Young-Chul - - 2013
By SF6 gas incorporation for relatively short time during the initial deposition stage, carbon coils could be formed on nickel catalyst layer-deposited silicon oxide substrate using C2H2 and H2 as source gases under thermal chemical vapor deposition system. The characteristics (formation density and morphology) of as-grown carbon coils were investigated ...
Kimmel J D - - 2013
Extracorporeal CO2 removal from circulating blood is a promising therapeutic modality for the treatment of acute respiratory failure. The enzyme carbonic anhydrase accelerates CO2 removal within gas exchange devices by locally catalyzing HCO3 (-) into gaseous CO2 within the blood. In this work, we covalently immobilized carbonic anhydrase on the ...
Kirmizis Dimitrios - - 2013
We studied the diagnostic accuracy of blood gas determination as a novel method for the estimation of arteriovenous fistula (AVF) recirculation (RC). In 25 patients on chronic haemodialysis, with failure of a previously well functioning native AVF (mean two-needle urea-based RC: 41±10%), arterial line (AL) as well as a peripheral ...
Liu Jia - - 2013
In this work, we proposed a novel method to investigate the underlying rapid pressure-to-flow dynamics induced by changes of arterial CO2. Autoregulation was modeled as a multivariate system. The instantaneous effect of CO2 to cerebral blood flow velocity (CBFV) was removed adaptively by the recursive least square (RLS) method from ...
Marmarelis V Z - - 2013
Previous studies have found that Alzheimer's disease (AD) impairs cerebral vascular function, even at early stages of the disease. This offers the prospect of a useful diagnostic method for AD, if cerebral vascular dysfunction can be quantified reliably within practical clinical constraints. We present a recently developed methodology that utilizes ...
Hollier Carly A - - 2013
This prospective study investigated the validity of arterialised-venous blood gases (AVBG) for estimating arterial carbon dioxide [Formula: see text] , pH and bicarbonate (HCO3(-)) in people with obesity hypoventilation syndrome (OHS). AVBGs were obtained from an upper limb vein, after heating the skin at 42-46°C. Arterial blood gas (ABG) and ...
Nicoll J - - 2013
INTRODUCTION: International neonatal resuscitation guidelines recommend that correct tube placement should be confirmed by clinical assessment and exhaled CO2 detection. Absence of exhaled CO2 after intubation suggests oesophageal intubation, non-aerated lungs, low tidal volume delivery, or low cardiac output. The relationship between changes in cardiac output and exhaled CO2 in ...
Marchesini Giorgio - - 2013
BACKGROUND: Ruminal acidosis is responsible for the onset of different pathologies in dairy and feedlot cattle, but there are major difficulties in the diagnosis. This study modelled the data obtained from various blood variables to identify those that could indicate the severity of ruminal acidosis. Six heifers were fed three ...
Waugh Jonathan B - - 2013
Purpose:Therapeutic gases and other modalities delivered by inhalation may affect the accuracy of capnographic measurements in two ways. First is the specificity of the measurement of CO2 within the device and second is the dilution effect of supplemental gases in the ambient air during CO2 sampling by the device. Our ...
Kreyer Stefan - - 2013
BACKGROUND:: Lung-protective mechanical ventilation with low tidal volumes (VT) is often associated with hypercapnia (HC), which may be unacceptable in patients with brain injury. CO2 removal using a percutaneous extracorporeal lung assist (pECLA) enables normocapnia despite low VT, but its effects on regional cerebral blood flow (rCBF) remain ambiguous. We ...
Tancredi Felipe B - - 2013
Stimulation of cerebral vasculature using hypercapnia has been widely used to study cerebral vascular reactivity (CVR), which can be expressed as the quantitative change in cerebral blood flow (CBF) per mm Hg change in end-tidal partial pressure of CO2 (PETCO2). We investigate whether different respiratory manipulations, with arterial spin labeling used ...
Tytgat Stefaan H A J - - 2013
BACKGROUND: Little is known about the direct effect of pneumoperitoneum (PP) on microcirculation and its influence on the quality of tissue perfusion. This study aimed to investigate the intraoperative effects of carbon dioxide (CO2) gas PP on microcirculation density and perfusion in neonates receiving laparoscopic surgery for hypertrophic pyloric stenosis. ...
Strang C M - - 2013
Background: Pneumoperitoneum (PP) by CO2-insufflation causes atelectasis however with maintained or even improved oxygenation. We studied the effect of abdominal insufflation by carbon dioxide (CO2) and air on gas exchange during PP. Methods: 27 anesthetized pigs were studied during PP with insufflations to 12 mmHg by either 1/ CO2, 2/ ...
Raby Karine - - 2013
Experiments were performed to remove nitrogen as ammonium in biotrickling filters (BTFs) treating synthetic swine manure. Two BTFs packed with polypropylene spheres and ceramic beads were used. BTFs were continuously fed, and leachate obtained was recirculated at different flow rates in the range from 0 to 1.5 L min(-1). When ...
Mutch W Alan C - - 2013
BACKGROUND: Monitoring cerebral saturation is increasingly seen as an aid to management of patients in the operating room and in neurocritical care. How best to manipulate cerebral saturation is not fully known. We examined cerebral saturation with graded changes in carbon dioxide tension while isoxic and with graded changes in ...
Regan Rosemary E - - 2013
The middle cerebral artery supplies long end-artery branches to perfuse the deep white matter and shorter peripheral branches to perfuse cortical and subcortical tissues. A generalized vasodilatory stimulus such as carbon dioxide not only results in an increase in flow to these various tissue beds but also redistribution among them. ...
Cain John R JR Wolfson Molecular Imaging Centre, Cancer and Enabling Sciences, University of Manchester, 23 Palatine Road, Withington, Manchester M20 3LJ, - - 2013
Purpose. To compare a semiopen breathing circuit with a non-rebreathing (Hudson mask) for MRI experiments involving gas delivery. Methods and Materials. Cerebral blood flow (CBF) was measured by quantitative phase contrast angiography of the internal carotid and basilar arteries in 18 volunteers (20-31 years). In 8 subjects, gases were delivered ...
Poublanc Julien J Department of Medical Imaging, Toronto Western Hospital, Toronto, Ont., - - 2013
Blood oxygen level-dependent (BOLD) magnetic resonance imaging (MRI) during manipulation of inhaled carbon dioxide (CO2) can be used to measure cerebrovascular reactivity (CVR) and map regions of exhausted cerebrovascular reserve. These regions exhibit a reduced or negative BOLD response to inhaled CO2. In this study, we sought to clarify the ...
Takahashi Hiroaki - - 2012
The aim of this study was to verify the correlation between mean blur rate (MBR) obtained with CCD-equipped laser speckle flowgraphy (LSFG) and capillary blood flow (CBF) obtained by the hydrogen gas clearance method in rabbit optic nerve head (ONH). Using Japanese white rabbits under systemic anesthesia, a hydrogen electrode ...
Cullen Jonathan M - - 2012
Our society is addicted to steel. Global demand for steel has risen to 1.4 billion tonnes a year and is set to at least double by 2050, while the steel industry generates nearly a tenth of the world's energy related CO2 emissions. Meeting our 2050 climate change targets would require ...
Bjerregård Asger - - 2012
Measurement of the arterial carbon dioxide (PaCO2) is an established part of the monitoring of mechanically ventilated patients. Other ways to get information about carbon dioxide in the patient are measurement of end-tidal carbon dioxide (PETCO2) and transcutaneous carbon dioxide (PTCCO2). Carbon dioxide in the blood and cerebral tissue has ...
Wearden Peter D - - 2012
The objective of this study was to demonstrate the safety and performance of a unique extracorporeal carbon dioxide removal system (Hemolung, ALung Technologies, Pittsburgh, PA) which incorporates active mixing to improve gas exchange efficiency, reduce exposure of blood to the circuit, and provide partial respiratory support at dialysis-like settings. An ...
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