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Results 351 - 400 of 868
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Wildberger Joachim Ernst - - 2005
PURPOSE: To evaluate the size and quantity of downstream emboli after thrombectomy using the Arrow-Trerotola Percutaneous Thrombolytic Device (PTD) with or without temporary filtration for extensive iliofemoral and iliocaval thrombi in an in vitro flow model. METHODS: Iliocaval thrombi were simulated by clotted bovine blood in a flow model (semilucent ...
Kløve Bjørn - - 2005
Controlled experiments were carried out in a mesoscale subsurface flow sand filter treating municipal wastewater from a single household. The system consisted of a 50 cm high vertical flow column (pre-filter) with unsaturated flow and a 3 m long horizontal subsurface flow unit (main filter) with saturated flow. Fluxes of ...
Hartmann Jens - - 2005
AIM: The newly developed 'Microspheres based Detoxification System' (MDS) designed for any extracorporeal adsorption therapy uses microparticles as adsorbents characterized by a size of 1-20 microm in diameter which are recirculated in the secondary (filtrate) circuit connected to a hollow fiber filter located in the primary (blood) circuit. In the ...
Li Gang - - 2005
We developed a brand-new method that fits the non-invasive blood component concentration measurement: the dynamic spectrum (DS) method. With use of this method, it was possible to eliminate the main interference of the individual discrepancy and extract some kinds of the blood component concentration by the analytic method. The definition, ...
Zhang S - - 2005
This paper describes a new method to fabricate large scale 3D weir-type filter for cell fractionation. The 3D structure is realized by a conformal bonding of two separate PDMS (poly-dimethyloxane) layers with in-situ microchannels which are formed by the conventional soft lithographic techniques. Moreover, the microfluidics channels on the two ...
Langenbeck U - - 2005
The need for regular blood-drawing in the management of chronic metabolic disorders may negatively influence the compliance of patients and their parents; noninvasive analytical procedures could well alleviate this burden. Using data obtained in six adult probands with phenylketonuria, we evaluate the feasibility of noninvasive prediction of phenylalanine blood concentrations ...
Brandl M - - 2005
BACKGROUND: A microsphere-based detoxification system is an adsorption system, whereby microadsorbent particles having diameters of 1-20 microm circulate in an extracorporeal filtrate circle. A thin-wall hollow-fiber membrane filter separates the microparticle-plasma suspension from the bloodstream. For patient safety, it is necessary to have a means to detect membrane ruptures that ...
Golabbakhsh M - - 2005
In this study, average power of tracheal sound (Pave) was used to estimate flow by parametric method as well as adaptive filters as a nonparametric method. Based on some preliminary studies, an exponential model was used for describing the relationship between flow and Pave for parametric method. It was assumed ...
Morrison Matthew A - - 2004
Artifacts associated with the fractionation of colloids in a freshwater sample were investigated for conventional membrane filtration (0.45 microm cutoff), and two tangential flow ultrafiltration cartridges (0.1 microm cutoff and 3000 MW cutoff). Membrane clogging during conventional filtration removed some colloids smaller than 0.1 microm in diameter, much smaller than ...
Yadav Jay S - - 2004
Emboli prevention devices have become an integral part of carotid stenting and have dramatically lowered the risk of stroke during the procedure. A variety of devices are available with different performance characteristics. Filter devices are the current mainstay and have high technical success rates. Slow flow through the filters can ...
Yamashita Akihiro C - - 2004
BACKGROUND: Many synthetic polymeric membranes have been widely used for blood purification therapies for removing larger solutes and for better blood compatibility. METHODS: Five different filters with polyester polymer alloy (PEPA) membrane (Nikkiso) that included polyvinylpyrrolidone (PVP), that is, standard-pore-size FLX (PEPA with PVP(-)), standard-pore-size FDX (PEPA with PVP(+)), new ...
Baldwin Ian - - 2004
OBJECTIVE: Reductions in blood flow rate may occur undetected during peristaltic pumping of blood through continuous renal replacement therapy circuits. We investigated whether undetected reductions in blood flow rate occur during continuous veno-venous haemofiltration, and whether they are correlated with filter life. PATIENTS: Twelve patients receiving continuous veno-venous haemofiltration in ...
Stroncek David F - - 2004
BACKGROUND Red blood cell (RBC) components from donors with sickle cell trait (Hb AS) often occlude white blood cell (WBC) reduction filters. Techniques were investigated to successfully filter Hb AS donor blood by increasing the Hb oxygen saturation with storage bags and conditions suitable for transfusion products. STUDY DESIGN AND ...
Yamato Osamu - - 2004
This report describes a rapid and simple method for mutation screening of G(M1) gangliosidosis in Shiba dogs by direct amplification of DNA from canine whole-blood specimens using a novel polymerase chain reaction (PCR) reagent cocktail, which can eliminate the DNA extraction process and amplify the genomic DNA directly from human ...
Paunovic Dragica - - 2004
BACKGROUND: Whole-blood (WB) leukoreduction filters in current use retain the majority of PLTs. A new whole-blood filter, which retains significantly fewer of the PLTs (or saves PLTs [WB-SP]), has been developed. The performance characteristics of the WB-SP filter have been evaluated in a multicenter study. STUDY DESIGN AND METHODS: A ...
Heiden M - - 2004
The study evaluated the quality of plasma obtained after whole-blood filtration with four different polyester filters and one polyurethane filter. The activities of coagulation factors and proteinase inhibitors were not or only negligibly affected by filtration, in all experiments. Filtration did not increase markers of clotting and fibrinolysis. Only a ...
Rentas F J - - 2004
BACKGROUND: In late January 2003, some blood centers and hospitals throughout the US voluntarily sus-pended the use of some RBC and plasma units for trans-fusion due to the presence of unknown white particulate matter (WPM) in these units. To better understand the WPM phenomena, a number of technologies were used ...
Simpson David M - - 2004
In order to assess blood flow control, the relationship between blood pressure and blood flow can be modeled by linear filters. We present a bootstrap method, which allows the statistical analysis of an index of blood flow control that is obtained from constrained system identification using an established set of ...
Karthik V Vishnu - - 2004
Filter holders and continuous air monitors are used extensively in the nuclear industry. It is important to minimize leakage in these devices, and, in recognition of this consideration, a limit on leakage for sampling systems is specified in; however, the protocol given in the standard is really germane to measurement ...
De Godoy José Maria Pereira - - 2004
Inferior vena cava filters are indicated for the prevention of pulmonary embolism when anticoagulation using heparin has failed or is contraindicated. The aim of this study was to assess in an in-vitro setting the efficiency of a new inferior vena cava filter to intercept emboli. The new filter, stent-filter, was ...
Gatti A M - - 2004
The research deals with new scanning electron microscopic evaluations of the interface between blood and explanted temporary vena cava filters from patients affected by blood disorders. The biological tissues adherent to the filter and the small thrombi formed in vivo were detached from the metallic structure of the device, fixed, ...
Beard Martin J - - 2004
BACKGROUND: Sickle cell trait donations can block leukodepletion (LD) filters or fail to LD, but the variables affecting blockage are unclear. STUDY DESIGN AND METHODS: To identify critical variables for further study, the relationship was investigated between filter blockage and donor characteristics, processing conditions, PLT and coagulation system activation, and ...
Wilkes A R - - 2004
When tested according to the European standard, the performance of breathing system filters is determined at a flow of 15 or 30 l.min-1 for filters intended for use with paediatric or adult patients, respectively. However, higher flows of gas may pass through a filter in some circumstances. The penetration of ...
Pérez-Pujol Sílvia - - 2004
BACKGROUND: Filtered PLT concentrates (PCs) were prepared in plasma pooling three (for children) or six buffy coats (BCs; for adults) after holding them a maximum of 4 hours (blood bags collected in the afternoon) or 18 hours (blood bags collected in the morning). STUDY DESIGN AND METHODS: With flow cytometry, ...
Pasqualetti Daniela - - 2004
Over the last few years, quality system requirements have been introduced for blood components. The necessary compliance with standard productions will have a considerable impact on Blood Banks. The introduction of automated methods is the most satisfactory means to meet these requirements for blood component preparation. A new device has ...
Schölvinck Elisabeth - - 2004
The gamma interferon secretion levels of 52 adults whose T cells had been stimulated with the Mycobacterium tuberculosis antigens CFP-10 and ESAT-6 were measured by enzyme-linked immunospot methods and a whole-blood-based assay. The test results correlated well (r = 0.689, P < 0.0001). Its simple format and use of only ...
Césaire Raymond - - 2004
BACKGROUND: WBC depletion by filtration may prevent the transmission of HTLV-I, which requires cell-to-cell contact. The removal of HTLV-I-infected cells in routinely filtered blood cell components was measured. STUDY DESIGN AND METHODS: The study was conducted in Martinique where systematic screening for HTLV-I and -II and universal leukoreduction are mandatory. ...
Johnson D W - - 2004
Malonylcarnitine and glutarylcarnitine are important diagnostic metabolites in the screening of dried blood spots by tandem mass spectrometry. The stability of these compounds in spiked blood spots stored at room temperature was studied. Both showed biphasic curves. The malonylcarnitine concentration dropped to 61% in 38 days and averaged 51% +/- ...
Yang Hong - - 2004
The technology core of biological removal of iron and manganese by contact oxidation is iron and manganese oxidizing bacteria. This article made a study on down flow and up flow filtration, the results show that down flow filtration of the homogenous filter medium is more adapted to the reproduction of ...
Mwaba Peter - - 2003
As antiretroviral drugs become widely available in developing countries, practical, field-friendly, and cheap methods of measuring CD4+ lymphocyte counts need to be developed. We tested use of whole blood spots dried on filter paper to measure CD4+ lymphocyte counts. We obtained blood from 42 HIV-1-infected patients from Zambia. We dried ...
Spiehler Vina - - 2003
The object of this study was to evaluate the suitability of the Neogen Corporation microtiter plate enzyme-linked immunoassay (ELISA) for cocaine and metabolites for screening of postmortem blood. Sixty-five postmortem whole blood specimens were obtained from drug-involved deaths that had been screened and confirmed positive for cocaine and/or benzoylecgonine (BE). ...
Gallippi Caterina M - - 2003
Blind source separation (BSS) for adaptive filtering is presented in application to imaging both physiological and acoustic radiation force impulse (ARFI)-induced tissue and blood motion in the common carotid artery. The collected raw radiofrequency (RF) data includes vessel wall motion, blood flow and ARFI-induced motion. In the context of these ...
Visconti Micaela Rios - - 2004
To assess removal of cytomegalovirus (CMV) by leukocyte depletion (LD) filters, we developed a spiking model of latent virus using peripheral blood mononuclear cells (PBMCs) infected by coculture with CMV-infected human fibroblasts. Infected PBMCs were purified by dual magnetic column selection and then spiked into whole blood units or buffy ...
Y. Usui,K. Nakano,Y. Motonaga
The replacement of human visual inspection for eggs with blood spots using transmitted light currently employed at grading and packing centers with a method using near infrared spectroscopy (NIRS) was studied. The determination is made using wavelength absorbance data since the hemoglobin in blood mixed in eggs with blood spots ...
Fino Debora - - 2003
It is probably redundant to stress how extensive are nowadays the attempts to reduce the diesel particulate emissions from automotive and stationary sources. The present paper looks into a technology relied on a catalytic trap based on a SiC wall-flow monolith lined with suitable catalysts for the sake of promoting ...
Zhang Qiuxia - - 2003
Photoplethysmography (PPG) was used to detect changes in the anterior tibial muscle blood flow (MBF) during foot-transmitted vibration in six healthy subjects. A filter was developed for reducing the vibration-induced artefacts in the PPG signal. The vibration applied was random with constant acceleration power density in the range 5-2000 Hz ...
Dalén T - - 2003
BACKGROUND AND OBJECTIVES: The aim of this study was to evaluate whether leucocyte-reducing filters influenced complement activation and the formation of pro-inflammatory cytokines in autotransfusion drain blood after knee arthroplasty. MATERIALS AND METHODS: Twenty-three patients undergoing knee arthroplasty were divided into two groups. All patients were given salvage blood postoperatively. ...
de Ana F J - - 2003
Previously, we presented a real-time method to measure blood flow perpendicular to the image plane of an intravascular ultrasound (IVUS) imaging system using a slow-time FIR (finite impulse response) filter bank. Any in-plane flow introduces error in the flow measurement using the filter bank algorithm. Simulations show that for a ...
Maeno Yoshimasa - - 2003
We examined the utility of dried blood on filter paper for the source of cytokine messenger RNA (mRNA). Total RNA was isolated from the dried blood of mice infected with Plasmodium yoelii, and cDNA was amplified by reverse transcription-polymerase chain reaction (RT-PCR). As a reference, we extracted total RNA from ...
Chaorattanakawee S - - 2003
To evaluate the effect of long-term storage of sample filters on the sensitivity of polymerase chain reaction (PCR) detection of malaria, 252 blood spots from patients with microscopically confirmed Plasmodium falciparum malaria were analyzed and stratified by storage duration. The spots were collected between 1996 and 2000 on filter paper ...
Voisard D - - 2003
This review focuses on cultivation of mammalian cells in a suspended perfusion mode. The major technological limitation in the scaling-up of these systems is the need for robust retention devices to enable perfusion of medium as needed. For this, cell retention techniques available to date are presented, namely, cross-flow filters, ...
Zimmermann Michael B - - 2003
BACKGROUND: Serum thyroglobulin appears to be a sensitive marker of thyroid dysfunction in endemic goiter. However, its value as an indicator of thyroid status in children after the introduction of iodized salt has not been tested. OBJECTIVE: The objective was to optimize and validate a thyroglobulin assay on dried whole ...
Schneider Susan - - 2003
Matrix metalloproteinases (MMPs) are a family of endopeptidases that function to remodel tissue during both normal physiology and pathology. Research performed by the Medical University of South Carolina found an increased release of several MMP species during cardiopulmonary bypass (CPB), including the subtype MMP-9, but whether and to what degree ...
Cecchi Laura M - - 2003
Newborn heelstick blood collection can be a painful procedure in part because of the time required to obtain sufficient quantity of blood. No previous studies have determined whether local vasodilatation using topical nitroglycerine ointment (NGO) would facilitate heelstick blood collection. OBJECTIVE: To determine if the topical application of NGO would ...
Ho Ming-Chung - - 2003
This work quantitatively demonstrates a nontrivial collective behavior, which depends on the coupling strength in chaotic-coupled-map lattices, using the interdependence measure emerging from a local unit. The amount of information flow which flows from the instantaneous mean field to a local map has been investigated using the time-delayed mutual information. ...
Schütt B S - - 2003
OBJECTIVE: The aim of this study is to adapt measurements of IGF-I, IGFBP-2 and IGFBP-3 to dried blood filter disk assays. METHODS: Measurements of the three analytes in serum samples and in the corresponding blood spotted onto filter paper were compared by applying standard radioimmunoassays. RESULTS: In paired experiments, the ...
Accinni Roberto - - 2003
Identification of homocystinuric newborns is hindered by the pitfalls of neonatal screening programs. We propose a fluorimetric HPLC method with a rapid pre-analytical step for homocysteine determination from neonatal dried blood spot cards. Homocysteine in blood spots sampled among 2000 healthy newborns on living day 4, averaged 2.92+/-2.07 microM (range ...
Hanna Darrin M - - 2003
This paper describes a system on a chip (SoC) that makes use of nanoscale cellular adhesion mechanisms in an integrated electronic microsystem to filter infected cells from blood or lymph. An example of a human immunodeficiency virus-specific SoC is explored in depth. Such systems work in vivo, and blood and ...
Shen Xiao-Ming - - 2003
BACKGROUND: Capillary filter paper can be useful for screening blood lead concentrations in large populations of geographically dispersed Chinese children. METHODS: A total of 159 at 0-6 years of age were enrolled in the study when they came for routine pediatric care. Paired venous and capillary filter paper samples were ...
Nagasawa Koichi - - 2003
The level of (1-->3)-beta-D-glucan in blood is a diagnostic index of fungal infection because it is released from the fungal cell wall. However, high levels of plasma (1-->3)-beta-D-glucan in patients administered blood components may give false positive results. High levels of (1-->3)-beta-D-glucan have been detected in blood components. We suspected ...
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