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Results 401 - 450 of 1842
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Quraishi Rizwana - - 2012
Dried blood spotted on to filter paper has been found suitable for a large number of studies. In tropical countries with varying temperature conditions the use of dried blood needs to be validated. We carried out this study to assess the use of blood spotted filter paper as a transport ...
Wang Liu-Hong - - 2012
To assess the blood flow of the proper digital artery using digital subtraction angiography (DSA) in the early stage after replantation. From January 2006 to October 2010, 27 anastomosed arteries in 27 replanted digits were included in the study. The patients included nine males and four females. The patients received ...
Buckley Erin M EM University of Pennsylvania, Department of Physics and Astronomy, 3231 Walnut Street, Philadelphia, Pennsylvania 19104, USA. - - 2012
Diffuse correlation spectroscopy (DCS) is a novel optical technique that appears to be an excellent tool for assessing cerebral blood flow in a continuous and non-invasive manner at the bedside. We present new clinical validation of the DCS methodology by demonstrating strong agreement between DCS indices of relative cerebral blood ...
Wu Pei-Ju PJ Division of Gynecologic Endoscopy, Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, - - 2012
The aim of this study was to present our experience with a novel approach called the pierce and push (PP) method which uses a stainless steel centimeter probe instead of a 5 mm claw forceps to enucleate fibroids in a laparoscopic myomectomy (LM). A retrospective chart review of 90 women ...
Akilli Nazire Belgin - - 2012
PURPOSE: The purpose of this study is to investigate whether there are any significant changes in the diameter and the area of the internal jugular vein (IJV) during the hemorrhagic shock. MATERIALS AND METHODS: Healthy volunteers donating blood were included in the study. Arterial blood pressure, pulse rate, anteroposterior (AP) ...
Schumacher Yorck Olaf - - 2012
The increase of the body's capacity to transport oxygen is a prime target for doping athletes in all endurance sports. For this pupose, blood transfusions or erythropoiesis stimulating agents (ESA), such as erythropoietin, NESP, and CERA are used. As direct detection of such manipulations is difficult, biomarkers that are connected ...
Kaufmann Tim A S - - 2012
Understanding circulatory autoregulation is essential for improving physiological control of rotary blood pumps and support conditions during cardiopulmonary bypass (CPB). Cerebral autoregulation (CAR), arguably the most critical, is the body's intrinsic ability to maintain sufficient cerebral blood flow (CBF) despite changes in aortic perfusion pressure. It is therefore imperative to ...
Park Kwon-Hee - - 2012
To assess the efficacy and safety of autologous transfusion of filtered shed blood in total knee arthroplasty (TKA). A total of 42 patients with TKA (group A; without autologous transfusion in 15 patients, group B; with autologous transfusion in 27 patients) were evaluated retrospectively. The influence of autologous reinfusion of ...
Zong Xiaopeng - - 2012
Blood-oxygenation-level-dependent (BOLD) fMRI has contributions from venous oxygenation and venous cerebral blood volume (CBV) changes. To examine the relative contribution of venous CBV change (ΔCBV(v)) to BOLD fMRI, BOLD and arterial CBV changes (ΔCBV(a)) to a 40-s forepaw stimulation in six α-chloralose anesthetized rats were measured using a magnetization transfer-varied ...
Ebihara Nobuyuki - - 2012
Background: To estimate the efficacy and safety of 0.1% tacrolimus ophthalmic suspension based on the blood level of tacrolimus in patients with severe allergic conjunctivitis. Methods: Fifty-two patients in whom topical anti-allergic agents had been ineffective were treated with 0.1% tacrolimus ophthalmic suspension twice daily for 12 weeks. Adverse drug ...
Rengier Fabian - - 2012
Three-dimensional velocity-encoded cine magnetic resonance imaging (3D VEC MRI) allows for calculation of secondary flow parameters that may be used to estimate prognosis of individual cardiovascular diseases. However, its accuracy has not been fully investigated yet. The purpose of this study was to validate aortic flow quantification by 3D VEC ...
Wu Wen-Chih - - 2012
OBJECTIVE:: Blood loss during surgery is an important operative complication in patients undergoing major noncardiac surgery and may increase postoperative morbidity and mortality. Variations in the delivery of operative blood transfusions to treat blood loss depend not only on the patient and surgery characteristics but also on the hospital transfusion ...
Sarlo Michela - - 2012
Reduced sympathetic outflow and deficits in cerebral hemodynamics have been considered as possible factors mediating the impaired cognitive performance in essential hypotension. However, the relationship between systemic blood pressure (BP), cerebral blood flow and cognitive functioning is still poorly understood. The present study was aimed at clarifying the physiological processes ...
Srinivasan Vivek J - - 2012
TO DATE, TWO MAIN CATEGORIES OF OCT TECHNIQUES HAVE BEEN DESCRIBED FOR IMAGING HEMODYNAMICS: Doppler OCT and OCT angiography. Doppler OCT can measure axial velocity profiles and flow in arteries and veins, while OCT angiography can determine vascular morphology, tone, and presence or absence of red blood cell (RBC) perfusion. ...
Nam Kweon-Ho - - 2012
Many studies have been performed to better understand the hemodynamics in microvessels, such as arterioles and venules. However, due to the heterogeneous features of size, shape, blood-flow velocity, and pulsatility of microvessels, conducting a systematic study on these factors has been almost impossible. Although in vitro studies have been performed ...
Feng Wei - - 2012
Purpose: To study the blood flow through the internal jugular veins (IJVs) of the MS population. Materials and Methods: Two hundred MS patients and 14 normal volunteers were evaluated with magnetic resonance imaging (MRI) at 3T. Contrast-enhanced time-resolved 3D MR angiography and 2D time-of-flight imaging were performed to assess abnormalities ...
Forsberg Ulf - - 2012
Previous studies have demonstrated the presence of air microemboli in the dialysis circuit and in the venous circulation of the patients during hemodialysis. In vitro studies indicate that a high blood level in the venous air trap reduces the extent of microbubble formation. The purpose of this study was to ...
Salinet Angela S M - - 2012
Cerebral blood flow velocity (CBFv) changes to sensorimotor and cognitive paradigms have been used to assess the integrity of hemodynamic responses, though the reproducibility of these responses has not been properly assessed. Continuous recordings of blood pressure, end-tidal CO(2), heart rate and bilateral CBFv were obtained during 60s of active, ...
Jung Sung Yong - - 2012
To measure instantaneous velocity fields of venous blood flow in a rat using X-ray particle tracking method. Gold nanoparticles (AuNPs) incorporated chitosan microparticles were applied as biocompatible flow tracers. After intravenous injection of the AuNP-chitosan particles into 7- to 9-week-old male rat vein, X-ray images of particle movement inside the ...
Wald Nicholas J - - 2012
Ductus venosus blood flow, expressed as a pulsatility index (DVPI) has been shown to improve the performance of the Combined and Integrated antenatal screening tests for Down's syndrome using previously published data. The use of ductus venosus blood flow as a categorical marker (reversed or absent end diastolic blood flow ...
Vuk Tomislav - - 2012
Continuous and efficient error management, including procedures from error detection to their resolution and prevention, is an important part of quality management in blood establishments. At the Croatian Institute of Transfusion Medicine (CITM), error management has been systematically performed since 2003. Data derived from error management at the CITM during ...
Satti Luqman - - 2012
In this study, we evaluated the performance of blood agar (by macroscopic growth) and nutrient agar (by a microcolony detection method) for drug susceptibility testing of Mycobacterium tuberculosis against rifampin (RIF) and isoniazid (INH), using 67 smear-positive sputum specimens. The direct proportion method on Lowenstein-Jensen (LJ) medium was used as ...
Bosticardo Gianmario - - 2012
BACKGROUND: There is no consensus regarding the optimal dialysate calcium concentration (DCa) during haemodialysis (HD). Low DCa may predispose to acute arrhythmias, whereas high DCa increases the long-term risk of soft tissue calcifications.METHODS: Twenty-two HD patients treated in four dialysis centres underwent two HD sessions, respectively, with 1.5 and 1.25 ...
Hosokawa Masahito - - 2012
Absolute counting of total leukocytes or specific subsets within small amounts of whole blood is difficult due to a lack of techniques that enable separation of all leukocytes from limited amounts of whole blood. In this study, a microfluidic device equipped with a size-controlled microcavity array for highly efficient separation ...
Agampodi Suneth B - - 2012
Quantitative polymerase chain reaction (qPCR), despite cost and logistical challenges, has the potential to provide accurate and timely diagnosis for leptospirosis at the point-of-care in endemic areas. We studied optimal sample types for qPCR, timing of sampling, and clinical manifestations in relation to quantitative leptospiremia. A new qPCR assay using ...
Strobel J - - 2012
Background  There is a lack of data on the usage of plasma derived/recombinant coagulation factor concentrates (PD/RCFC) regarding diagnostic categories. An audit of PD/RCFC and blood component usage at a tertiary care teaching hospital in northern Bavaria was conducted. Study design and methods  All blood components and PD/RCFC transfused at ...
Dexter Franklin - - 2012
BACKGROUND:: At many hospitals, the type and screen decision is guided by the hospital's maximum surgical blood order schedule, a document that includes for each scheduled (elective) surgical procedure a recommendation of whether a preoperative type and screen be performed. There is substantial heterogeneity in the scientific literature for how ...
Pasic Miralem - - 2012
We report a successful third complex heart operation without the transfusion of any allogeneic blood or blood products in a female Jehovah's Witness patient who had pronounced preoperative anaemia with a haemoglobin value of 6.9 mg/dl. The report shows that such a procedure is possible without any transfusion of allogeneic ...
Lellouche François - - 2012
BACKGROUND: One century after the introduction of the oxygen flowmeter into clinical practice, we have developed a device, FreeO₂ that automatically titrates the oxygen flow delivered to spontaneously breathing patients, with the aim of maintaining stable pulse oximetry(SpO₂). We evaluated this system in healthy subjects during induced hypoxemia. METHODS: Hypoxemia ...
Hoge R D - - 2012
Functional magnetic resonance imaging with blood oxygenation level-dependent (BOLD) contrast has had a tremendous influence on human neuroscience in the last twenty years, providing a non-invasive means of mapping human brain function with often exquisite sensitivity and detail. However the BOLD method remains a largely qualitative approach. While the same ...
Muller Matthew D MD Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania, - - 2012
The purpose of this echocardiography study was to measure peak coronary blood flow velocity (CBV(peak)) and left ventricular function (via tissue Doppler imaging) during separate and combined bouts of cold air inhalation (-14 ± 3°C) and isometric handgrip (30% maximum voluntary contraction). Thirteen young adults and thirteen older adults volunteered ...
Lee Jong Wha - - 2012
BACKGROUND: Recently, there have been several nationwide episodes involving imported toys contaminated with toxic metals and environmental hormones. In addition, cadmium intoxication has occurred due to soil contamination with cadmium from abandoned metal mines. OBJECTIVES: To investigate the distribution, extent and factors influencing the levels of toxic metals in the ...
Lin J - - 2012
Perfusion quality during cardiopulmonary bypass (CPB) procedures can contribute to postoperative neurological complications and influence patient recovery and outcome. Gaseous microemboli generated in the circuit and hemodynamic properties of blood reaching the patient can be monitored during CPB to optimize perfusion. Oxygenators that oxygenate the blood during CPB can significantly ...
Wang Aaron S - - 2012
Vascular ultrasound can provide quick and reliable diagnosis of arterial bleeding but it requires trained and experienced personnel. Development of automated sonographic bleed detection methods would potentially be valuable for trauma management in the field. We propose a detection method that (1) measures blood flow in a trauma victim, (2) ...
Groves Alan M AM Department of Pediatrics, Hammersmith Hospital, Imperial College London, London, UK. - - 2012
Consistent patterns of rotational intracardiac flow have been demonstrated in the healthy adult human heart. Intracardiac rotational flow patterns are hypothesized to assist in the maintenance of kinetic energy of inflowing blood, augmenting cardiac function. Newborn cardiac function is known to be suboptimal secondary to decreased receptor number and sympathetic ...
Throckmorton Amy L - - 2012
OBJECTIVE: Advances in the geometric design of blood-contacting components are critically important as the use of minimally invasive, intravascular blood pumps becomes more pervasive in the treatment of adult and pediatric patients with congestive heart failure. The present study reports on the evaluation of uniquely shaped filaments and diffuser blades ...
Zhang Haibin - - 2012
Aims: The purpose of this study was to characterize left ventricular (LV) intracavitary flow during the isovolumic contraction (IVC) period in humans using vector flow mapping. Methods: Color flow Doppler imaging was performed from the apical long-axis view in 61 patients with heart failure and 58 healthy volunteers. Doppler flow ...
Petrov I Y - - 2012
Monitoring (currently invasive) of cerebral venous blood oxygenation is a key to avoiding hypoxia-induced brain injury resulting in death or severe disability. Noninvasive, optoacoustic monitoring of cerebral venous blood oxygenation can potentially replace existing invasive methods. To the best of our knowledge, we report for the first time noninvasive monitoring ...
Dhananjayan V - - 2012
To describe exposure level of organochlorine pesticides (OCP) among workers occupationally engaged in agriculture and sheep wool associated jobs, the present study was carried out in rural neighborhood of Bangalore city, India. Thirty participants were interviewed and obtained informed consent before blood sample collection. The maximum concentrations of OCP were ...
Mahajan Babita - - 2012
BACKGROUND: There is still a need to improve the sensitivity of polymerase chain reaction (PCR) tests for malaria to detect submicroscopic asexual stage Plasmodium infections during the early phase and chronic, asymptomatic phase of infection when the parasite burden is very low. STUDY DESIGN AND METHODS: The inhibitory effect of ...
Raju S - - 2012
BACKGROUND: Studies of orthostatic changes in cutaneous micro-perfusion have yielded conflicting results, likely from imprecision of legacy equipment. METHODS: Postural flow changes in the femoral vessels and cervical carotids were measured in healthy normal adults using duplex equipment. Nutrient skin flow was measured using Hyperspectral imager (OxyVu-2™), a newer non-touch ...
Piirilä Päivi - - 2012
Introduction. Although fractional exhaled nitric oxide (FENO) measurement is a widely used method to assess eosinophilic bronchial inflammation, knowledge on extrabronchial factors affecting measurement results is still limited. Our aim was to study the eventual modifying effect of mouth wash on FENO values and their variability. Materials and Methods. A ...
Chmielewski Danielle - - 2012
BACKGROUND: The Motivation Crowding-out Theory suggests that incentives undermine intrinsic motivation and thus blood donation behavior. While there is strong evidence showing the negative relationship between monetary incentives and blood donation, findings on the effect of nonmonetary incentives are mixed. Set in a voluntary, nonremunerated environment, this study explores aspects ...
Caboot Jason B JB Division of Pulmonary Medicine, Department of Pediatrics, University of Pennsylvania School of Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA. - - 2012
Assessment of oxyhemoglobin saturation in patients with sickle cell disease (SCD) is vital for prompt recognition of hypoxemia. The accuracy of pulse oximeter measurements of blood oxygenation in SCD patients is variable, partially due to carboxyhemoglobin (COHb) and methemoglobin (MetHb), which decrease the oxygen content of blood. This study evaluated ...
Dora Mbanya - - 2012
Patient Blood Management (PBM) is a patient-focused multidisciplinary and comprehensive concept that is designed to ensure the optimal, appropriate and safe use of blood and blood products, resulting in better outcome and safety for the recipients. The World Health Organization, in May 2010, adopted a resolution in favour of PBM, ...
Petersen Lyle R - - 2012
BACKGROUND: Dengue virus (DENV) nucleic acid amplification testing of blood donations during epidemics in endemic locations, including Puerto Rico, has suggested possible sizable transfusion transmission risk. Estimates of the long-term prevalence of DENV viremic donations will help evaluate the potential magnitude of this risk in Puerto Rico. STUDY DESIGN AND ...
Blasi Annabel - - 2012
BACKGROUND: Rotation thromboelastometry (TEM) has been proposed as a convenient alternative to standard coagulation tests in guiding the treatment of coagulopathy during orthotopic liver transplantation (OLT). This study was aimed at assessing the value of TEM in monitoring blood coagulation and guide transfusion support in OLT. STUDY DESIGN AND METHODS: ...
Lindholm Espen - - 2012
BACKGROUND: Levels of proinflammatory mediators in unwashed salvaged blood from abdominal aortic aneurism (AAA) surgery are unknown. We hypothesized that there are higher levels of these mediators in unwashed blood salvaged in AAA surgery compared to hip replacement surgery. STUDY DESIGN AND METHODS: Ten patients scheduled for AAA surgery (Group ...
Roca-Tey Ramon - - 2012
Introduction. Periodic blood flow (QA) measurement is the preferred way for arteriovenous fistula (AVF) surveillance in chronic hemodialysis (HD) patients. Objectives. 1) Assess the efficacy of the temperature gradient method (TGM) on the QA determinations using the Twister&trade; device and to compare the functional results with the Delta-H method. 2) ...
Sogawa Kenji - - 2012
PURPOSE: To investigate the relationship between the choroidal thickness and choroidal blood flow in healthy young subjects. DESIGN: Retrospective, cross-sectional study. METHODS: We examined 25 eyes of 25 healthy young Japanese subjects. The subfoveal choroidal thickness was measured by enhanced depth imaging optical coherence tomography (EDI-OCT). The total choroidal blood ...
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