keyword
MENU ▼
Read by QxMD icon Read
search

blood volume

keyword
https://www.readbyqxmd.com/read/29451509/-diagnosis-and-treatment-of-blood-volume-changes-in-acute-heart-failure-a-brief-practical-guide
#1
Paola Ciancetta, Salvatore M Maggiore, Flavia Petrini, Raffaele De Caterina
The correct management of acute heart failure continues to pose diagnostic and therapeutic challenges. In particular, administering the right type and dose of fluids and drugs, thus avoiding fluid overload while establishing organ perfusion, is of key importance in stabilizing critical patients and improving prognosis. A correct estimate of the fluid volume status, however, may be difficult, as the invasive evaluation of cardiac filling pressures by cardiac catheterization is limited in routine medical practice, and there is no universal consensus on the best tools for its non-invasive evaluation...
January 2018: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/29451394/clinical-application-of-microsampling-versus-conventional-sampling-techniques-in-the-quantitative-bioanalysis-of-antibiotics-a-systematic-review
#2
Yarmarly C Guerra Valero, Steven C Wallis, Jeffrey Lipman, Christophe Stove, Jason A Roberts, Suzanne L Parker
Conventional sampling techniques for clinical pharmacokinetic studies often require the removal of large blood volumes from patients. This can result in a physiological or emotional burden, particularly for neonates or pediatric patients. Antibiotic pharmacokinetic studies are typically performed on healthy adults or general ward patients. These may not account for alterations to a patient's pathophysiology and can lead to suboptimal treatment. Microsampling offers an important opportunity for clinical pharmacokinetic studies in vulnerable patient populations, where smaller sample volumes can be collected...
February 16, 2018: Bioanalysis
https://www.readbyqxmd.com/read/29451130/intrinsic-optical-signal-imaging-of-the-blood-volume-changes-is-sufficient-for-mapping-the-resting-state-functional-connectivity-in-the-rodent-cortex
#3
Sreekanth Kura, Hongyu Xie, Buyin Fu, Cenk Ayata, David A Boas, Sava Sakadzic
OBJECTIVE: Resting state functional connectivity (RSFC) allows the study of functional organization in normal and diseased brain by measuring the spontaneous brain activity generated under resting conditions. Intrinsic optical signal imaging (IOSI) based on multiple illumination wavelengths has been used successfully to compute RSFC maps in animal studies. The IOSI setup complexity would be greatly reduced if only a single wavelength can be used to obtain comparable RSFC maps. APPROACH: We used anesthetized mice and performed various comparisons between the RSFC maps based on single wavelength as well as oxy-, deoxy- and total hemoglobin concentration changes...
February 16, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29451109/-orthostatic-hypotension-in-elderly-patients
#4
J A H R Claassen
- Orthostatic hypotension is a condition in which there is insufficient recovery of the blood pressure drop which occurs after getting up, which causes a temporary reduction of cerebral perfusion. This increases the risk of falls resulting in injuries.- Orthostatic hypotension is most common in the elderly. The cause is usually multifactorial (including reduced circulating volume, reduced peripheral resistance and limited heart rate increase). Orthostatic hypotension caused by autonomic dysfunction is called neurogenic orthostatic hypotension...
2018: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/29450932/cardiorespiratory-noise-correction-improves-the-asl-signal
#5
Mahlega S Hassanpour, Qingfei Luo, W Kyle Simmons, Justin S Feinstein, Martin P Paulus, Wen-Ming Luh, Jerzy Bodurka, Sahib S Khalsa
Cardiorespiratory fluctuations such as changes in heart rate or respiration volume influence the temporal dynamics of cerebral blood flow (CBF) measurements during arterial spin labeling (ASL) fMRI. This "physiological noise" can confound estimates of resting state network activity, and it may lower the signal-to-noise ratio of ASL during task-related experiments. In this study we examined several methods for minimizing the contributions of both synchronized and non-synchronized physiological noise in ASL measures of CBF, by combining the RETROICOR approach with different linear deconvolution models...
February 15, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29450732/combined-prostatic-urethral-lift-and-remodeling-of-the-prostate-and-bladder-neck-a-modified-transurethral-approach-in-the-treatment-of-symptomatic-lower-urinary-tract-obstruction
#6
Martin Schoenthaler, Karl-Dietrich Sievert, Dominik Stefan Schoeb, Arkadiusz Miernik, Thomas Kunit, Simon Hein, Thomas R W Herrmann, Konrad Wilhelm
PURPOSE: The aim of the study was to evaluate the feasibility and safety of combining prostatic urethral lift (PUL) and a limited resection of the prostatic middle lobe or bladder neck incision in the treatment of lower urinary tract symptoms (LUTS) secondary to benign prostatic hyperplasia (BPH). METHODS: Twenty-eight patients were treated at two tertiary centers and followed prospectively. Patient evaluations included patient characteristics, relief of LUTS symptoms, erectile and ejaculatory function, continence, operative time and adverse events...
February 15, 2018: World Journal of Urology
https://www.readbyqxmd.com/read/29450601/usefulness-of-perfusion-and-diffusion-weighted-imaging-to-differentiate-between-pilocytic-astrocytomas-and-high-grade-gliomas-a-multicenter-study-in-japan
#7
Kazufumi Kikuchi, Akio Hiwatashi, Osamu Togao, Koji Yamashita, Ryotaro Kamei, Mika Kitajima, Masafumi Kanoto, Hiroto Takahashi, Yusuke Uchiyama, Masafumi Harada, Yuki Shinohara, Takashi Yoshiura, Yuki Wakata, Hiroshi Honda
PURPOSE: Imaging findings of pilocytic astrocytoma (PA) vary widely, sometimes resembling those of high-grade glioma (HGG). This study aimed to identify the imaging parameters that can be used to differentiate PA from HGG. METHODS: Altogether, 60 patients with PAs and 138 patients with HGGs were included in the study. Tumor properties and the presence of hydrocephalus, peritumoral edema, and dissemination were evaluated. We also measured the maximum relative cerebral blood flow (rCBF max ) and volume (rCBV max ) and determined the minimum apparent diffusion coefficient (ADC min ) in the tumor's solid components...
February 15, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29450197/platelet-counts-in-insoluble-platelet-rich-fibrin-clots-a-direct-method-for-accurate-determination
#8
Yutaka Kitamura, Taisuke Watanabe, Masayuki Nakamura, Kazushige Isobe, Hideo Kawabata, Kohya Uematsu, Kazuhiro Okuda, Koh Nakata, Takaaki Tanaka, Tomoyuki Kawase
Platelet-rich fibrin (PRF) clots have been used in regenerative dentistry most often, with the assumption that growth factor levels are concentrated in proportion to the platelet concentration. Platelet counts in PRF are generally determined indirectly by platelet counting in other liquid fractions. This study shows a method for direct estimation of platelet counts in PRF. To validate this method by determination of the recovery rate, whole-blood samples were obtained with an anticoagulant from healthy donors, and platelet-rich plasma (PRP) fractions were clotted with CaCl 2 by centrifugation and digested with tissue-plasminogen activator...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29450194/avoiding-arterial-hypotension-in-preterm-neonates-ahip-a-single-center-randomised-controlled-study-investigating-simultaneous-near-infrared-spectroscopy-measurements-of-cerebral-and-peripheral-regional-tissue-oxygenation-and-dedicated-interventions
#9
Gerhard Pichler, Nina Höller, Nariae Baik-Schneditz, Bernhard Schwaberger, Lukas Mileder, Jasmin Stadler, Alexander Avian, Jasmin Pansy, Berndt Urlesberger
Introduction: Up to 50% of preterm infants admitted to intensive care units require cardiocirculatory support. The aim of the present study was to assess whether simultaneous monitoring of cerebral tissue oxygenation index (cTOI) and peripheral tissue oxygenation index (pTOI) using near-infrared spectroscopy (NIRS) in combination with dedicated intervention guidelines may help avoiding arterial hypotension and catecholamine administration in preterm neonates. Study design: Preterm neonates <37 weeks of gestation were included in a single center randomized controlled study...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29449081/urinary-concentrations-of-benzophenone-type-ultra-violet-light-filters-and-reproductive-parameters-in-young-men
#10
Evdochia Adoamnei, Jaime Mendiola, Miriam Moñino-García, Fernando Vela-Soria, Luz M Iribarne-Durán, Mariana F Fernández, Nicolás Olea, Niels Jørgensen, Shanna H Swan, Alberto M Torres-Cantero
BACKGROUND: Benzophenone (BP)-type ultraviolet (UV) light filters are chemicals frequently added to personal care products, insect repellents, sunscreens, and beverage and food packaging to diminish the harmful effects of UV sunlight on human skin or foodstuffs. BP-type UV filters have shown negative effects on male reproduction function in in vitro and animal models, but human epidemiologic studies are limited. The goal of this study was to examine associations between urinary concentrations of BP-type UV filters and semen quality and reproductive hormone levels...
February 9, 2018: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29448990/open-abdomen-in-liver-transplantation
#11
T Chan, M S Bleszynski, D S Youssef, M Segedi, S Chung, C H Scudamore, A K Buczkowski
INTRODUCTION: Damage control laparotomy with vacuum assisted closure (VAC) is used for selective cases in trauma. In liver transplantation, VAC has also been applied for management of intra-operative hemorrhage. The primary objective was to evaluate peri-operative blood loss and blood product utilization in VAC compared to primary abdominal closure (PAC) at the index transplant operation. METHODS: Retrospective review of all adults undergoing deceased donor liver transplantation (2007-2011) at a single center tertiary care institution...
January 31, 2018: American Journal of Surgery
https://www.readbyqxmd.com/read/29448888/cross-linked-cholecyst-derived-extracellular-matrix-for-abdominal-wall-repair
#12
Jeffrey Chee Yean Chan, Krishna Burugapalli, Yi-Shiang Huang, Jack L Kelly, Abhay Pandit
Abdominal wall repair frequently utilizes either non-degradable or bio-degradable meshes, which are found to stimulate undesirable biological tissue responses or which possess suboptimal degradation rate. In this study, a biologic mesh prototype made from carbodiimide-cross-linked cholecyst-derived extracellular matrix (EDCxCEM) was compared with small intestinal submucosa (Surgisis®), cross-linked bovine pericardium (Peri-Guard®), and polypropylene (Prolene®) meshes in an in vivo rabbit model. The macroscopic appearance and stereological parameters of the meshes were evaluated...
February 16, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29447902/the-erythrocyte-osmotic-resistance-test-as-screening-tool-for-cholesterol-related-lysosomal-storage-diseases
#13
Laura López de Frutos, Jorge J Cebolla, Pilar Irún, Ralf Köhler, Pilar Giraldo
BACKGROUND: Erythrocyte volume regulation and membrane elasticity are essential for adaptation to osmotic and mechanical stress, and life span. Here, we evaluated whether defective cholesterol trafficking caused by the rare lysosomal storages diseases (LSDs), Niemann-Pick type C (NPC) and Lysosomal acid lipase (LAL) deficiency (LALD) impairs these properties. Moreover, we tested whether measurements of cholesterol membrane content and osmotic resistance serve as a screening test for these LSDs...
February 12, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29447888/pathogenesis-of-chronic-rhinosinusitis-in-patients-affected-by-%C3%AE-thalassemia-major-and-sickle-cell-anaemia-post-allogenic-bone-marrow-transplant
#14
F Martino, R Di Mauro, K Paciaroni, J Gaziev, C Alfieri, L Greco, R Floris, S Di Girolamo, M Di Girolamo
OBJECTIVES: Sickle cell anemia (SCA) and β -thalassemia major are well-recognized beta-globin gene disorders of red blood cells associated to mortality and morbidity included bone morbidities due to ineffective erythropoiesis and bone marrow expansion, which affect every part of the skeleton. While there are an abundance of described disease manifestations of the head and neck, the manner of paranasal sinuses involvement and its relations to β-thalassemia and SCA process was not studied yet...
March 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29447763/scaling-of-bony-canals-for-encephalic-vessels-in-euarchontans-implications-for-the-role-of-the-vertebral-artery-and-brain-metabolism
#15
Doug M Boyer, Arianna R Harrington
Supplying the central nervous system with oxygen and glucose for metabolic activities is a critical function for all animals at physiologic, anatomical, and behavioral levels. A relatively proximate challenge to nourishing the brain is maintaining adequate blood flow. Euarchontans (primates, dermopterans and treeshrews) display a diversity of solutions to this challenge. Although the vertebral artery is a major encephalic vessel, previous research has questioned its importance for irrigating the cerebrum. This presents a puzzling scenario for certain strepsirrhine primates (non-cheirogaleid lemuriforms) that have reduced promontorial branches of the internal carotid artery and no apparent alternative encephalic vascular route except for the vertebral artery...
January 2018: Journal of Human Evolution
https://www.readbyqxmd.com/read/29447298/effects-of-voluntary-running-exercise-on-bone-histology-in-type-2-diabetic-rats
#16
Yuri Takamine, Noriko Ichinoseki-Sekine, Takamasa Tsuzuki, Toshinori Yoshihara, Hisashi Naito
The incidence of obesity in children and adolescents, which may lead to type 2 diabetes, is increasing. Exercise is recommended to prevent and improve diabetes. However, little is known about the bone marrow environment at the onset of diabetes in the young, and it is unclear whether exercise training is useful for maintaining bone homeostasis, such as mechanical and histological properties. Thus, this study clarified the histological properties of bone and whether exercise contributes to maintaining bone homeostasis at the onset of type 2 diabetes in rats...
2018: PloS One
https://www.readbyqxmd.com/read/29446524/impact-of-blood-flow-restricted-bodyweight-exercise-on-skeletal-muscle-adaptations
#17
J E Jakobsgaard, M Christiansen, P Sieljacks, J Wang, T Groennebaek, F de Paoli, K Vissing
This study ascertains the ability of bodyweight blood flow-restricted (BFR) exercise training to promote skeletal muscle adaptations of significance for muscle accretion and metabolism. Six healthy young individuals (three males and three females) performed six weeks of bodyweight BFR training. Each session consisted of five sets of sit-to-stand BFR exercise to volitional failure with 30-second inter-set recovery. Prior to, and at least 72 h after training, muscle biopsies were taken from m. vastus lateralis to assess changes in fibre type-specific cross-sectional area (CSA), satellite cell (SC) and myonuclei content and capillarization, as well as mitochondrial protein expression...
February 15, 2018: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29445802/pulsatile-plasma-filtration-and-cell-free-dna-amplification-using-a-water-head-driven-point-of-care-testing-chip
#18
Yonghun Lee, Dong-Min Kim, Zhenglin Li, Dong-Eun Kim, Sung-Jin Kim
We demonstrate a microfiltration chip that separates blood plasma by using water-head-driven pulsatile pressures rather than any external equipment and use it for on-chip amplification of nucleic acids. The chip generates pulsatile pressures to significantly reduce filter clogging without hemolysis, and consists of an oscillator, a plasma-extraction pump, and filter units. The oscillator autonomously converts constant water-head pressure to pulsatile pressure, and the pump uses the pulsatile pressure to extract plasma through the filter...
February 15, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29445792/understanding-receptor-mediated-endocytosis-of-elastic-nanoparticles-through-coarse-grained-molecular-dynamic-simulation
#19
Zhiqiang Shen, Huilin Ye, Ying Li
For nanoparticle (NP)-based drug delivery platforms, the elasticity of the NPs has a significant influence on their blood circulation time and cellular uptake efficiency. However, due to the complexity of the endocytosis process and the inconsistency in the definition of elasticity for NPs in experiments, the understanding about the receptor-mediated endocytosis process of elastic NPs is still limited. In this work, we developed a coarse-grained molecular dynamics (CGMD) model for elastic NPs. The energy change of the elastic NPs can be precisely controlled by the bond, area, volume and bending potentials of this CGMD model...
February 15, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29445633/the-effect-of-intensive-statin-therapy-on-symptomatic-intracranial-arterial-stenosis
#20
Peiyang Zhou, Zhihua Cao, Pu Wang, Guangzhi Liu, Xuan Yao, Puqing Wang, Guang Li, Guibin Zhang, Ping Gao
Background: The aim of this study was to observe the effect of intensive statin therapy on symptomatic intracranial arterial stenosis. Methods: overall, 120 patients with symptomatic intracranial arterial stenosis were admitted to the Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, China from January 2010 to May 2013. They were randomly divided into three groups and were given different doses of atorvastatin orally for 1 year or more, and followed up for 12 months...
February 2018: Iranian Journal of Public Health
keyword
keyword
1847
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"