Search Results
Results 251 - 300 of 1830
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Mansoor G Farooq - - 2012
BACKGROUND: The purpose of this study was to assess functionality and resources of facilities providing blood collection and transfusion services in Afghanistan. STUDY DESIGN AND METHODS: This national cross-sectional assessment included facilities collecting or transfusing blood identified through official data sources and private key informants. At each facility, study representatives ...
O'Toole Amanda C - - 2012
Ciguatera in humans is typically caused by the consumption of reef fish that have accumulated Ciguatoxins (CTXs) in their flesh. Over a six month period, we captured 38 wild adult great barracuda (Sphyraena barracuda), a species commonly associated with ciguatera in The Bahamas. We sampled three tissues (i.e., muscle, liver, ...
Hautvast Gilion G Imaging Systems—MR, Philips Healthcare, Best 5684 PC, Netherlands. - - 2012
We have evaluated the use of deconvolution using an exponential approximation basis for the quantification of myocardial blood flow from perfusion cardiovascular magnetic resonance. Our experiments, based on simulated signal intensity curves, phantom acquisitions, and clinical image data, indicate that exponential deconvolution allows for accurate quantification of myocardial blood flow. ...
Kalaska Bartlomiej - - 2012
Heparin is a natural polymer widely used in medicine especially during the treatment of cardiovascular diseases since it is a potent blood anticoagulant. In case of emergency, e.g., massive hemorrhage, the anticoagulant activity of heparin has to be quickly stopped by the administration of a heparin reversing agent. Currently protamine ...
Hahn Andreas - - 2012
Image-derived input functions (IDIFs) represent a promising technique for a simpler and less invasive quantification of PET studies as compared to arterial cannulation. However, a number of limitations complicate the routine use of IDIFs in clinical research protocols and the full substitution of manual arterial samples by venous ones has ...
Janko Marek - - 2012
Changes in elasticity and structures of red blood cells (RBCs) are important indicators of disease, and this makes them interesting for medical studies. In forensics, blood analyses represent a crucial part of crime scene investigations. For these reasons, the recovery and analysis of blood cells from ancient tissues is of ...
Gottesman Rebecca F - - 2012
Anemia has been associated with elevated cerebral blood flow (CBF) in animal models and certain clinical conditions (eg, renal disease), but whether hemoglobin level variations across a relatively normal range are associated with local or diffuse CBF changes is unclear. We investigated whether lower hemoglobin is associated with regional increases ...
Mendez Sarah J - - 2012
As part of a scheduled policy and procedure review, the department of nursing education at a large urban academic medical center conducted a literature review to determine the most up-to-date evidence for central venous access device (CVAD) blood draws. The literature review revealed that the dead space blood draw was ...
Seruya Mitchel - - 2012
Object Controlled hypotension is routinely used during open repair of craniosynostosis to decrease blood loss, although this benefit is unproven. In this study the authors analyzed the longitudinal relationships between intraoperative mean arterial pressure (MAP) and calculated blood loss (CBL) during frontoorbital advancement (FOA) for craniosynostosis. Methods The authors reviewed ...
Doenitz Christoph A - - 2012
The aim of this study was to demonstrate whether it is possible to objectively assess the effects of acupuncture by microcirculation-related parameters in the given clinical scenario, to evaluate the significance of the status of capillary perfusion prior to acupuncture for the treatment of a clinical cold pattern, and to ...
Konokhova Anastasiya I - - 2012
We describe a novel approach to study blood microparticles using the scanning flow cytometer, which measures light scattering patterns (LSPs) of individual particles. Starting from platelet-rich plasma, we separated spherical microparticles from non-spherical plasma constituents, such as platelets and cell debris, based on similarity of their LSP to that of ...
Ben Romdhane Neila - - 2012
Background: Blood transfusion is a high risk activity. Aim: To evaluate transfusion safety in planned cardiac surgery. Methods: This study was conducted in the blood bank of the Rabta Hospital in two phases: a phase to observe transfusion acts followed by corrective actions and a phase to evaluate the impacts ...
Li Fumin - - 2012
Dried blood spots can be a convenient and ethical means of sampling when analyzing compounds in blood. As with any analytical technique, success of the resulting analyses hinge on the precision and accuracy of sample collection, handling and extraction. In this Special Feature, a new method for dried blood spot ...
Wei Hou Han - - 2012
Sepsis is an adverse systemic inflammatory response caused by microbial infection in blood. This paper reports a simple microfluidic approach for intrinsic, non-specific removal of both microbes and inflammatory cellular components (platelets and leukocytes) from whole blood, inspired by the invivo phenomenon of leukocyte margination. As blood flows through a ...
Spinella Philip C - - 2012
BACKGROUND: Blood operations are constrained by many limitations in combat settings. As a result there are many challenges that require innovative solutions. STUDY DESIGN AND METHODS: This is a descriptive overview of blood product usage and transfusion medicine adaptations that have been employed by the US military to support combat ...
Eren B - - 2012
The aim of the article was to present and discuss the phenomenon of delayed fatal spleen rupture case. A 13-year-old boy was referred to hospital because of his poor general condition, convulsions, tachypnea, shallow breathing, severe paleness, abdominal tenderness, decrease in blood pressure, low blood hemoglobin levels, leukocytosis. Abdominal pain ...
Saha Ratan K - - 2012
A theoretical model investigating the dependence of optoacoustic (OA) signal on blood oxygen saturation (SO(2)) is discussed. The derivations for the nonbandlimited and bandlimited OA signals from many red blood cells (RBCs) are presented. The OA field generated by many RBCs was obtained by summing the OA field emitted by ...
Plag Camille - - 2012
Blood coagulation is a series of biochemical reactions resulting in the mechanical transformation of liquid blood into a gel. As a consequence, ultrasound, being mechanical waves, can provide specific details on the dynamics of coagulation. In fact, previous high-frequency ultrasound monitoring studies have shown drastic changes in ultrasound velocity and ...
Friesen Kristina M - - 2012
Reproductive potential was assessed for stable fly cohorts fed cattle, chicken, or horse blood. Flies provided chicken blood oviposited 20% more eggs per day than did those fed cattle or horse blood. However, flies provided cattle or horse blood were fecund 50% longer. When both egg viability and number of ...
Sasaki Nobuhiko - - 2012
Oxygen transport is believed to primarily occur via capillaries and depends on the oxygen tension gradient between the vessels and tissues. As blood flows along branching arterioles, the O2 saturation drops, indicating either consumption or diffusion. The blood flow rate, the O2 concentration gradient, and Krogh's O2 diffusion constant (K) ...
Park Michael Yong - - 2012
The purpose of this article is to examine the effect of different beam-flow angles on the accuracy of Doppler ultrasound velocity measurements in modern ultrasound systems. A flow phantom was used to create a steady flow of water in a 4.3-mm-diameter tube. Using three different modern university-grade ultrasound systems, flow ...
Lakshminarayanan Subitha - - 2012
Physical activity of moderate intensity for 30 minutes a day, on most days substantially reduces the risk of many chronic diseases. To assess the effect of regular physical activity on blood pressure and blood sugar levels in a rural Indian community This community-based study was carried out in Periakattupalayam and ...
Ray Aniruddha - - 2012
The determination of oxygen levels in blood and other tissues in vivo is critical for ensuring proper body functioning, for monitoring the status of many diseases, such as cancer, and for predicting the efficacy of therapy. Here we demonstrate, for the first time, a lifetime-based photoacoustic technique for the measurement ...
Bijari Payam B - - 2012
Arterial geometry has long been considered as a pragmatic alternative for inferring arterial flow disturbances, and their impact on the natural history and treatment of vascular diseases. Traditionally, definition of geometric variables is based on convenient shape descriptors, with only superficial consideration of their influence on flow and wall shear ...
Campbell Ian C - - 2012
Patient-specific computational fluid dynamics (CFD) is a powerful tool for researching the role of blood flow in disease processes. Modern clinical imaging technology such as MRI and CT can provide high resolution information about vessel geometry, but in many situations, patient-specific inlet velocity information is not available. In these situations, ...
Petrofsky Jerrold Scott - - 2012
Measurement of resting blood flow to the skin and other organs is an important indicator of health and disease and a way to assess the reaction to various stimuli and pharmaceutical interventions. However, unlike plasma ions such as sodium or potassium, it is difficult to determine what the proper value ...
Bittencourt Ricardo R Maternity Carmela Dutra, Hospital Naval Marcílio Dias, Santa Catarina, Brazil. - - 2012
With the surgical and anesthetic technology advance the indications for intervention are expanding, as well as the need for blood transfusions. Because of its great scientific value, the content to be exposed is subject for endless discussions that provide different guidelines in various clinical and laboratory aspects. The objective of ...
Tancredi Felipe B - - 2012
PURPOSE: To compare the performance of pulsed and pseudocontinuous arterial spin-labeling (PASL and pCASL) methods in measuring CO(2) -induced cerebrovascular reactivity (CVR). MATERIALS AND METHODS: Subjects were scanned using both ASL sequences during a controlled hypercapnia procedure and visual stimulation. CVR was computed as the percent CO(2) -induced increase in ...
Vercaigne M - - 2012
Aims: Catheter-related thrombosis is a frequent complication of providing hemodialysis via central venous catheters. The primary aim of this study was to compare the efficacy of an alteplase &ldquo;dwell&rdquo; protocol over 30 minutes (with an additional 90 minutes where necessary) to a new 30 minute &ldquo;push&rdquo; protocol in restoring function ...
De Buyst Julie - - 2012
OBJECTIVE: To determine the hemodynamic impact of fluid restriction in preterm newborns with significant patent ductus arteriosus. STUDY DESIGN: Newborns ≥24 and <32 weeks' gestational age with significant patent ductus arteriosus were eligible for this prospective multicenter observational study. We recorded hemodynamic and Doppler echocardiographic variables before and 24 hours ...
Jeffus Susanne - - 2012
This article provides a concise overview of blood banking and transfusion medicine (BBTM) for the therapeutic apheresis medicine practitioner. It addresses the complete pathway from blood donor qualification to blood collection, to processing and storing blood components, to patient testing, to ordering blood components for therapeutic apheresis (TA) procedures, to ...
Frank Steven M - - 2012
BACKGROUND:: Data can be collected for various purposes with anesthesia information management systems. The authors describe methods for using data acquired from an anesthesia information management system to assess intraoperative utilization of blood and blood components. METHODS:: Over an 18-month period, data were collected on 48,086 surgical patients at a ...
Masaki Nami - - 2012
The purpose of this study was to evaluate the differences in heel blood flow during loading and off-loading in bedridden adults older than 65 years. The patients were divided into three groups based on ankle-brachial pressure index (ABI) and transcutaneous oxygen tension (tcPO(2)): (1) patients with an ABI ≥ 0.8 ...
Baart A Mireille - - 2012
BACKGROUND: Each year, approximately 5% of the invited blood donors is eventually deferred from donation because of low hemoglobin (Hb) levels. Estimating the risk of Hb deferral in blood donors can be helpful in the management of the donation program. We developed and validated a prediction model for Hb deferral ...
Yücel Meryem A MA Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA. - - 2012
Multimodal imaging improves the accuracy of the localization and the quantification of brain activation when measuring different manifestations of the hemodynamic response associated with cerebral activity. In this study, we incorporated cerebral blood flow (CBF) changes measured with arterial spin labeling (ASL), Diffuse Optical Tomography (DOT) and blood oxygen level-dependent ...
Jagadeesan B D - - 2012
SUMMARY:We retrospectively identified 9 consecutive children, 3 males and 6 females (age 5.2 ± 6.3 years, range 1 day to 18 years), with known or suspected AVGs who underwent MR imaging, including SWI, at our institution between January 2007 and March 2011. On the SWI sequence, arterialized blood flow was ...
Rutkowska G - - 2012
BACKGROUND AND PURPOSE:Flow simulations in patient-specific models of the subarachnoid space characterize CSF flow in more detail than MR flow imaging. We extended previous simulation studies by including cyclic CSF flow and patient-specific models in multiple patients with Chiari I. We compared simulation results with MR flow measurements.MATERIALS AND METHODS:Volumetric ...
van Slooten Ymkje J - - 2012
BACKGROUND: The staged Fontan procedure is used to palliate functionally univentricular hearts. The effect of additional pulmonary blood flow combined with a bidirectional cavopulmonary shunt in these patients remains a controversial subject. METHODS: This retrospective study included all 82 patients with a unilateral or bilateral bidirectional cavopulmonary shunt at our ...
Li Miaosi - - 2012
A response in writting: A low-cost bioactive paper device is designed to perform ABO and RhD blood typing tests, and the paper reports the results in writing. This idea was inspired by the vision of the British author, J. K. Rowling, through her novel "Harry Potter and the Chamber of ...
Williams J - - 2012
This study tested the hypothesis that variable freshwater flow in the Gippsland Lakes, Australia, influences the location and extent of environmental conditions suitable for spawning and larval development of black bream, Acanthopagrus butcheri. Freshwater flow had a large influence on the salinity and level of stratification (difference between bottom and ...
Dongaonkar Ranjeet M - - 2012
Venomotion, spontaneous cyclic contractions of venules, was first observed in the bat wing 160 years ago. Of all the functional roles proposed since then, propulsion of blood by venomotion remains the most controversial. Common animal models that require anesthesia and surgery have failed to provide evidence for venular pumping of ...
Masamoto Kazuto - - 2012
Anesthesia has broad actions that include changing neuronal excitability, vascular reactivity, and other baseline physiologies and eventually modifies the neurovascular coupling relationship. Here, we review the effects of anesthesia on the spatial propagation, temporal dynamics, and quantitative relationship between the neural and vascular responses to cortical stimulation. Previous studies have ...
Ju Zhaoyu - - 2012
BACKGROUND: Tissue expansion has been widely used to provide additional soft tissue for clinical reconstruction. Rapid expansion requires a much shorter clinical period than conventional expansion; however, less natural skin growth occurs resulting in a larger stretch-back ratio and insufficient extra soft tissue for clinical use. In this study, hyperbaric oxygen ...
Ren Hugang - - 2012
Speckle contrast based optical coherence angiography (OCA) and optical coherence Doppler tomography (ODT) have been applied to image cerebral blood flow previously. However, the contrast mechanisms of these two methods are not fully studied. Here, we present both flow phantom and in vivo animal experiments using ultrahigh-resolution OCA (μOCA) and ...
Katoh Chietsugu - - 2012
PURPOSE: Myocardial blood flow (MBF) estimation with (82)Rubidium ((82)Rb) positron emission tomography (PET) is technically difficult because of the high spillover between regions of interest, especially due to the long positron range. We sought to develop a new algorithm to reduce the spillover in image-derived blood activity curves, using non-uniform ...
Edelman Gerda - - 2012
Non-destructive identification and subsequent age estimation of blood stains are significant steps in forensic casework. The latter can provide important information on the temporal aspects of a crime. As previously shown, visible spectroscopy of blood stains on white backgrounds can successfully be used for their identification and age estimation. The ...
Grosse-Wortmann Lars - - 2012
OBJECTIVE: Aortopulmonary collaterals are a frequent phenomenon in patients after bidirectional cavopulmonary connection. The aortopulmonary collateral flow volume can be quantified using cardiac magnetic resonance imaging. However, the significance of aortopulmonary collateral flow for the postoperative outcome after total cavopulmonary connection is unclear and was sought to be determined. METHODS: ...
Salinet Angela S M - - 2012
This study aimed to compare the response of metabolic-induced cerebral hemodynamic changes measured using transcranial Doppler (TCD) ultrasonography during passive, active and motor imagery paradigms, and associated peripheral hemodynamic responses. Continuous recordings of bilateral cerebral blood flow velocity (CBFv), blood pressure, heart rate and end-tidal CO(2) were performed in 12 ...
Barr L L MRC/University Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK. - - 2012
There is increasing evidence that monocytes play a key role in the pathogenesis of acute lung inflammation. Mononuclear cell (MNC) leukapheresis can be used to remove large numbers of monocytes from circulating blood; however, the detailed characteristics of monocyte subpopulations removed by MNC leukapheresis, and the biological effects on the ...
Sharma Ritu - - 2012
PCR is usually performed on purified DNA. However, the extraction of DNA from whole blood is time consuming and involves the risk of contamination at every step. Hence, it is desirable to amplify DNA directly from whole blood. Earlier, investigators tried to achieve this target by either pretreatment of whole ...
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