Search Results
Results 1 - 50 of 542
1 2 3 4 5 6 7 8 9 10 >
Kumar Rudra - - 2014
An efficient non-gassing electroosmotic pump (EOP) with long-lasting electrodes and exceptionally stable operation is developed by using novel flow-through polyaniline (PANI) wrapped aminated graphene (NH2-G) electrodes. The NH2-G/PANI electrode combines the excellent oxidation/reduction capacity of PANI with exceptional conductivity and inertness of NH2-G. The flow rate varies linearly with voltage ...
Bertolizio Gianluca G Departments of *Anesthesiology, Perioperative and Pain Medicine. Electronic address: - - 2014
Superior vena cava pressure after the bidirectional Glenn operation usually is higher than that associated with the preceding shunt-dependent circulation. The aim of the present study was to determine whether the acute elevation in central venous pressure was associated with changes in cerebral oxygenation and perfusion. Single-center prospective, observational cohort ...
Huang Rong Fung RF a Department of Mechanical Engineering , National Taiwan University of Science and Technology , 43 Keelung Road, Section 4, Taipei, Taiwan , Republic of - - 2014
ABSTRACT The flow and spillage characteristics of an inclined quad-vortex (IQV) range hood subject to the influence of drafts from various directions were studied. The laser-assisted smoke flow visualization technique was used to reveal the flow characteristics, and the tracer-gas (sulphur hexafluoride) concentration detection method was used to indicate the ...
Andrade Leandro H LH Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United - - 2014
E. coli cells containing overexpressed (R)-selective ω-transaminase and the cofactor PLP were immobilized on methacrylate beads suitable for continuous flow applications. The use of an organic solvent suppresses leaching of PLP from the cells; no additional cofactor was required after setting up the packed-bed reactor containing the biocatalyst (ω-TA-PLP). Non-natural ...
Ishiyama T T Department of Anesthesiology, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, - - 2014
We measured the effect of Patent Blue dye on oxyhaemoglobin saturations after injection into breast tissue: 40 women had anaesthesia for breast surgery maintained with sevoflurane or propofol (20 randomly allocated to each). Saturations were recorded with a digital pulse oximeter, in arterial blood samples and with a cerebral tissue ...
Haanschoten M C MC Department of Anesthesiology, Catharina Hospital, Eindhoven, the - - 2014
In our institution, we have redefined our criteria for direct availability of red blood cell (RBC) units in the operation room. In this study, we sought to evaluate the safety of applying this new logistical policy of blood transfusion in the first preliminary group of patients. In March 2010, we ...
Stoecklein Daniel D Department of Mechanical Engineering, Iowa State University, Ames, Iowa, USA. - - 2014
The ability to control the shape of a flow in a passive microfluidic device enables potential applications in chemical reaction control, particle separation, and complex material fabrication. Recent work has demonstrated the concept of sculpting fluid streams in a microchannel using a set of pillars or other structures that individually ...
Guo Cheng-Long CL School of Electric Power Engineering, China University of Mining and Technology, Xuzhou, 221116, China, - - 2014
A biofilm photobioreactor under unsaturated flow condition (BFPBR-U) is proposed using a polished optical fiber as the internal light source for photo-H2 production in continuous culture. The main chamber was filled with spherical glass beads to create the reaction bed and the cells were immobilized to form a biofilm under ...
Kaviani Nasser N Dept. of Anesthesiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, - - 2014
Reducing the patients' stress can prevent, or at least, limit the increase in blood glucose level. The study compares the effect of propofol and midazolam on blood glucose level in the patients undergoing dental implant surgery. The effect of pre-operational stress on blood glucose level during the surgery is also ...
Kamath Atul F AF Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, - - 2014
The efficacy of saline-coupled bipolar sealing devices in joint arthroplasty is uncertain, and the utility in simultaneous bilateral total knee arthroplasty (TKA) has not been reported. This study compares the use of bipolar sealing and conventional electrocautery in 71 consecutive patients. The experimental and control groups were matched for age, ...
Kim Kun Il KI Department of Thoracic and Cardiovascular Surgery, Hallym University College of - - 2014
Conservation of blood during cardiac surgery is important because of the shortage of donor blood, risks associated with transfusion, and the costs of allogeneic blood products. This retrospective study explored the feasibility of off-pump coronary artery bypass (OPCAB) without transfusion. One hundred and two consecutive patients underwent OPCAB from January ...
McAllister Ian L IL Centre for Ophthalmology and Visual Science, Lions Eye Institute, The University of Western Australia, Perth, Australia. Electronic address: - - 2014
To evaluate the effect of central venous pressure (CVP) on visual outcomes and retinal ischemic consequences in patients with central retinal vein occlusion (CRVO). Prospective, single-center cohort study. Eighty-eight patients with CRVO and a high overall mean area (21.6 disc areas) of capillary nonperfusion (CNP) who were followed for 18 ...
Rose Kalpana K School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, - - 2014
To investigate grader learning effect and to quantify intergrader reproducibility of Doppler Spectral-Domain Optical Coherence Tomography (SD-OCT) derived retinal blood flow measurements. Fifteen healthy young subjects (mean age 28.44; SD 3 years) underwent Doppler SD-OCT scans of one eye using the circumpapillary double circular scan protocol of the Optovue RTVue by ...
Varatharajan Lavanya L Academic Section of Vascular Surgery, Imperial College London, London, - - 2014
This pilot study aims to determine the effect of the Revitive™ footplate neuromuscular electrical stimulation device on venous and arterial haemodynamic changes in healthy individuals. The blood flow (cc/min) and time averaged mean velocity (cm/s) of the superficial femoral vein and artery were measured using ultrasound at baseline, 15 min during, ...
Nargis Waheeda W Department of Biochemistry, Uttara Adhunik Medical College Hospital, Uttara, Dhaka, - - 2014
Measurement of serum or plasma bicarbonate (HCO3 (-)) from a sample of peripheral venous blood is routinely practiced in hospital patient managements. HCO3 (-) status can also be obtained by a simple calculation during blood gas analysis requiring arterial blood as sample which is cumbersome for both patient and doctor. ...
Gómez-Simón A A Centro Regional de Hemodonación, Servicio de Hematología y Oncología Médica, IMIB, Universidad de Murcia, Murcia, - - 2014
Inaccuracy of fingerstick haemoglobin compromises donor's health and losses blood donations. We evaluated the benefit of double haemoglobin screening with HemoCue. Blood donors underwent fingerstick screening by HemoCue and were driven for donation if capillary haemoglobin was within the regulatory range. Those failing were drawn venous blood and donated if ...
Chen Huiting - - 2014
Hemodynamic changes vascular flow and waveforms measured across the thoracic outlet (TO) during positional changes may occur in normal individuals. The aim of this study was to establish the prevalence of significant arterial and venous hemodynamic variation in limbs of normal volunteers during standardized upper extremity positional changes. Using Doppler ...
Heylen Olivier O From the Department of Clinical Chemistry and Radio-immunology, Universitair Ziekenhuis Brussel, Brussels, - - 2014
We evaluated the Sebia CAPILLARYS 2 Flex Piercing (Cap 2FP; Sebia, Lisses, France) for measurement of hemoglobin A1c (HbA1c) on venous and capillary blood samples. We analyzed whole-blood samples and control materials with the Cap 2FP and Tosoh G8 (Tosoh Corporation, Tokyo, Japan). Capillary blood samples were analyzed on the ...
Rose Kalpana K Optometry and Vision Science, University of Waterloo, 200, University avenue west, Waterloo, N2L3G1, - - 2014
Purpose:The aim of this study was to investigate the impact of cigarette smoking in otherwise healthy young individuals on retinal blood flow (RBF) and vascular reactivity (RVR). Methods:An automated gas flow controller (RespirAct™) was used to achieve normoxic hypercapnia in ten non-smokers (mean age 28.9; SD 4.6 years) and nine ...
Di Tommaso Mariarosaria M Department of Health Sciences, University of Florence, Florence, Italy. Electronic address: - - 2014
To determine the reliability of the cord blood gas analysis on the unclamped cord compared to the standard technique of sampling on double clamped cord. Prospective observational study conducted on 46 singleton neonates vaginally delivered at term. Matched pairs of umbilical artery and vein blood samples were collected from unclamped ...
Schierenbeck Fanny F Section of Cardiothoracic Surgery and Anesthesiology, Karolinska University Hospital, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden - - 2014
We have previously shown that intravascular microdialysis in a central vein is an accurate method for continuous glucose monitoring in patients undergoing cardiac surgery. However, no hypoglycemia occurred in our earlier studies, prompting further evaluation of the accuracy of intravascular microdialysis in the hypoglycemic range. Thus, this animal study was ...
Ricci Kristin S KS Department of Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, - - 2014
Transfusion of blood products requires a vascular port. Use of an indwelling central venous catheter (CVC) provides this port readily and safely in general; however, potential risks require assessment. The objective was to examine septic reactions to blood transfusions performed via CVCs owing to subclinical microbial catheter colonization. All transfusion ...
Li Min M Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, Shenyang 110001, PR - - 2014
To explore whether the first or the second drop of blood is more suitable for the self-monitoring of blood glucose (SMBG). SMBG was employed in hospitalized patients using the first and second drop of blood. Venous blood glucose was measured meanwhile. The differences in blood glucose measurements were then compared ...
Schierenbeck Fanny - - 2014
Lactate is a marker of hypoperfusion and may be used for risk assessment in critically ill patients. Although evidence suggests that repeated lactate measurements are of clinical interest, how and when lactate should be analyzed is controversial. Intravascular microdialysis provides a novel method for the continuous monitoring of lactate, which ...
Liu Manju M Department of Biomedical Engineering, Wayne State University, Detroit, - - 2014
Idiopathic Parkinson's disease (IPD) remains one of those neurodegenerative diseases for which the cause remains unknown. Many clinically diagnosed cases of IPD are associated with cerebrovascular disease and white matter hyperintensities (WMHs). The purpose of this study was to investigate the presence of transverse sinus and extracranial venous abnormalities in ...
Staelens Anneleen S E AS Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium; Department of Obstetrics & Gynaecology, Ziekenhuis Oost Limburg, Genk, Belgium. Electronic address: - - 2014
The nature of venous Doppler waves is highly variable. An additional electrocardiogram (ECG) improves the interpretation of venous Doppler wave characteristics and allows measurement of venous pulse transit time. The purpose of this study was to assess the reproducibility of ECG-guided repeated measurements of venous Doppler flow characteristics before and ...
Zakharov Sergey S Department of Occupational Medicine, Toxicological Information Center, General University Hospital and First Faculty of Medicine of Charles University in Prague, Prague, Czech - - 2014
During an outbreak of methanol poisonings in the Czech Republic in 2012, we were able to study methanol and formate elimination half-lives during intermittent hemodialysis (IHD) and continuous veno-venous hemodialysis/hemodiafiltration (CVVHD/HDF) and the relative impact of dialysate and blood flow rates on elimination. Data were obtained from 11 IHD and ...
Fryer Simon M SM School of Sport and Exercise, University of Gloucestershire, Gloucester, United - - 2014
Venipuncture is expensive, invasive and impractical for many sport science and clinical based settings. Salivary free cortisol is often cited as a non-invasive practical alternative. However, when cortisol concentrations exceed the corticosteroid binding globulin (CBG) point of 500nmol·L-1 a lack of agreement between salivary and venous blood cortisol has been ...
Monti L L From the Unit of Neuroimaging and Neurointervention (L.M., E.M., S.L., U.A., M.B., A.Z., P.G.), Department of Neurological and Sensorial Sciences, Azienda Ospedaliera Universitaria Senese, Santa Maria alle Scotte General Hospital, Siena, Italy; Department of Medicine, Surgery and Neuroscience (P.P.), University of Siena, Siena, Italy; and Unit of Endovascular and Percutaneous Therapy (A.C.), Clinica Nuestra Señora del Rosario, Madrid, - - 2014
The autonomic nervous system maintains constant cerebral venous blood outflow in changing positions. Alterations in cerebral autoregulation can be revealed by postural changes at quantitative color Doppler sonography. The aim of this study was to reach an optimal cutoff value of the difference between the cerebral venous blood outflow in ...
Mathews Lindsey A LA Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, - - 2014
To determine if lactate concentrations in jugular venous and auricular arterial blood differ in anesthetized sheep. Prospective, controlled experimental study. Twelve healthy adult ewes, 4-7 years and weighing 62-77 kg. Jugular venous blood was collected before anesthesia (PreOv ) for measurement of lactate concentration, packed cell volume and total protein. Ewes were ...
Ilkhchoui Yashar Y Department of Anesthesiology and Critical Care Medicine, University of New Mexico, School of Medicine, Albuquerque, NM 87106, USA. Electronic address: - - 2014
A 26 year old primigravida with preeclampsia was diagnosed with a cerebral venous thrombosis 6 days following Cesarean section. The diagnosis was initially challenging due to the patient's history of migraines, the preeclampsia, multiple attempts at spinal anesthesia for Cesarean section, and a dural puncture while performing epidural blood patch.
Nash Rupert W RW Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United - - 2014
Modeling blood flow in larger vessels using lattice-Boltzmann methods comes with a challenging set of constraints: a complex geometry with walls and inlets and outlets at arbitrary orientations with respect to the lattice, intermediate Reynolds (Re) number, and unsteady flow. Simple bounce-back is one of the most commonly used, simplest, ...
Langston C C Bobst Hospital of the Animal Medical Center, New York, - - 2014
Intraluminal thrombosis of central venous catheters used for renal replacement therapy (RRT) decreases the ability to provide adequate treatment. Alteplase is a recombinant tissue plasminogen activator that has been used to improve the function of catheters used for RRT in humans. To retrospectively review alteplase instillation in dysfunctional catheters used ...
Gram Anne S AS aDepartment of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen bUnit for Thrombosis Research, Institute of Public Health, University of Southern Denmark and Department of Clinical Biochemistry, Hospital of South West Denmark, Esbjerg, - - 2014
Effects of venous blood arterialization on cardiovascular risk markers are still unknown. We evaluated biomarkers of inflammation, coagulation, fibrinolysis, and endothelial function in arterialized compared with regular venous blood. Cubital venipunctures were obtained from 10 healthy volunteers. Arterialization was generated by 10 min heating of the contralateral hand. Concentrations of albumin, ...
Nauseef William M WM Inflammation Program and Department of Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Coralville, IA, - - 2014
Venous blood provides a ready source of large numbers of unstimulated granulocytes and mononuclear cells. Exploiting the differences in the relative densities of the leukocytes circulating in venous blood, one can separate leukocytes from erythrocytes as well as isolate the individual leukocyte populations in high purity for use in ex ...
Ortells-Abuye Nativitat N Emergency Service, Hospital de Palamós, Serveis de Salut Integrats Baix Empordà, Palamós, Girona, - - 2014
To demonstrate the equivalence between blood collection methods using direct venous puncture (DVP) and a peripheral venous catheter or cannula (PVC). A cross-sectional study of simple crossover design with within-subject measures carried out between October 2011 and May 2012 at a regional hospital in Spain. 272 patients aged 18 or ...
Myburgh Jan G JG Department of Paraclinical Sciences, University of Pretoria. - - 2014
The post-occipital sinus of the spinal vein is often used for the collection of blood samples from crocodilians. Although this sampling method has been reported for several crocodilian species, the technique and associated anatomy has not been described in detail in any crocodilian, including the Nile crocodile (Crocodylus niloticus). The anatomy of the ...
Xing Yue-Li YL Department of Blood Transfusion, Binzhou Medical University Hospital, Binzhou, China E-mail : - - 2014
To explore the influence of different ways of blood transfusion on the expression levels of interleukins (IL) and tumor necrosis factor-α (TNF-α) inperi-operative patients with esophageal cancer. A total of 80 patients with esophageal cancer who underwent radical operations were selected as study patients and randomly divided into an observation ...
Al-Sebaei Maisa O MO Department of Oral and Maxillofacial Surgery, King AbdulAziz University, Faculty of Dentistry, PO Box 80209, Jeddah, 21589 Kingdom of Saudi - - 2014
Patients undergoing orthognathic procedures can require blood transfusions. The objectives of this study were to evaluate the predictors of intra-operative blood loss in patients undergoing orthognathic procedures and the transfusion rates and practices of our institution. This retrospective study included 92 patients who underwent the following four types of orthognathic ...
Stern Liron L Department of Applied Physics, The Benin School of Engineering and Computer Science, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel. - - 2014
We design, fabricate and experimentally demonstrate a novel generic method to detect flow rates and precise changes of flow velocity in microfluidic devices. Using our method we can measure flow rates of ~2 mm/s with a resolution of 0.08 mm/s. The operation principle is based on the Doppler shifting of ...
Fahs Christopher A CA Fitchburg State University, 160 Pearl Street, Fitchburg, MA, 01420, USA, - - 2013
To examine the effects of low-load knee extensor training to fatigue with and without blood flow restriction (BFR) on calf vascular conductance, calf venous compliance, and peripheral arterial stiffness in middle-aged individuals. Eleven men (55 ± 8 years) and five post-menopausal women (57 ± 5 years) completed 6 weeks of unilateral knee extensor training with one limb ...
Chang K K Department of Radiology, Center for Biomedical Imaging, New York University School of Medicine, New York, New York; Division of Biology, Caltech, Pasadena, California; and Department of Radiology, Wayne State University School of Medicine, Detroit, - - 2013
BACKGROUND AND PURPOSE:Cerebrovascular oxygenation changes during respiratory challenges have clinically important implications for brain function, including cerebral autoregulation and the rate of brain metabolism. SWI is sensitive to venous oxygenation level by exploitation of the magnetic susceptibility of deoxygenated blood. We assessed cerebral venous blood oxygenation changes during simple voluntary ...
Thibault Paul - - 2013
Chronic cerebrospinal venous insufficiency (CCSVI) is a condition associated with multiple sclerosis (MS) and manifested by stenoses in the extracranial venous circulation. There is a need for an objective non-invasive assessment of CCSVI that is able to accurately identify the location of stenoses and quantify physiological changes in blood flows ...
Smith W Zachary - - 2013
The evacuated hemothorax has been poorly described because it varies with time, it has been found to be incoagulable, and its potential effect on the coagulation cascade during autotransfusion is largely unknown. This is a prospective descriptive study of adult patients with traumatic chest injury necessitating tube thoracostomy. Pleural and ...
Woinarski Nicholas C Z NC Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, VIC, Australia. - - 2013
Near-infrared spectroscopy of the thenar eminence (NIRSth) can be used at the bedside to assess tissue oxygenation (StO2), the reperfusion response to ischaemia and the tissue haemoglobin index (THI). Its ability to estimate forearm blood flow (FBF) has not previously been assessed. We aimed to test whether short-lived venous occlusion-induced ...
Schrauben E M - - 2013
BACKGROUND AND PURPOSE:The chronic cerebrospinal venous insufficiency hypothesis raises interest in cerebrospinal venous blood flow imaging, which is more complex and less established than in arteries. For accurate assessment of venous flow in chronic cerebrospinal venous insufficiency diagnosis and research, we must account for physiologic changes in flow patterns. This ...
Hatler Carol - - 2013
To evaluate venous pool technique (VPT) for obtaining neonatal blood samples as compared with the needlestick technique. An experimental design was used with subjects enrolled in two phases: an equivalence phase (N = 10) and a comparison phase (N = 64). In the equivalence phase, subjects weighing 1,500 g or ...
Ivanov Alexey Y - - 2013
Cerebral venous drainage is generally believed to be regulated primarily by hydrodynamic forces. To gain further insight into the regulation of this process, we investigated the response of blood flow velocity and cross-sectional area (CSA) of the internal jugular veins (IJVs) to local hemodynamic shifts. All procedures and assessments were ...
Macgowan Christopher K - - 2013
Altered cerebrovascular blood flow has been proposed as a mechanism for multiple sclerosis (MS). The primary objective of this study was to measure arterial and venous blood flow in adolescent MS patients and healthy controls (HC), in whom confounding factors such as age and lifestyle are less influential. Phase-contrast magnetic ...
Bickler Philip E - - 2013
BACKGROUND:Cerebral oximetry is a noninvasive optical technology that measures frontal cortex blood hemoglobin-oxygen saturation. Commercially available cerebral oximeters have not been evaluated independently. Unlike pulse oximeters, there are currently no Food and Drug Administration standards for performance or accuracy. We tested the hypothesis that cerebral oximeters accurately measure a fixed ...
1 2 3 4 5 6 7 8 9 10 >