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Fluid shift*

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https://www.readbyqxmd.com/read/28646608/fluid-filling-of-the-digestive-tract-for-improved-proton-resonance-frequency-shift-based-mr-thermometry-in-the-pancreas
#1
Cyril J Ferrer, Lambertus W Bartels, Marijn van Stralen, Baudouin Denis de Senneville, Chrit T W Moonen, Clemens Bos
PURPOSE: To demonstrate that fluid filling of the digestive tract improves the performance of respiratory motion-compensated proton resonance frequency shift (PRFS)-based magnetic resonance (MR) thermometry in the pancreas. MATERIALS AND METHODS: In seven volunteers (without heating), we evaluated PRFS thermometry in the pancreas with and without filling of the surrounding digestive tract. All data acquisition was performed at 1.5T, then all datasets were analyzed and compared with three different PRFS respiratory motion-compensated thermometry methods: gating, multibaseline, and referenceless...
June 24, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28638626/effects-of-liposomal-curcumin-on-five-opportunistic-bacterial-strains-found-in-the-equine-hindgut-preliminary-study
#2
S D Bland, E B Venable, J L McPherson, R L Atkinson
BACKGROUND: The horse intestinal tract is sensitive and contains a highly complex microbial population. A shift in the microbial population can lead to various issues such as inflammation and colic. The use of nutraceuticals in the equine industry is on the rise and curcumin is thought to possess antimicrobial properties that may help to minimize the proliferation of opportunistic bacteria. METHODS: Four cecally-cannulated horses were utilized to determine the optimal dose of liposomal-curcumin (LIPC) on reducing Streptococcus bovis/equinus complex (SBEC), Escherichia coli K-12, Escherichia coli general, Clostridium difficile, and Clostridium perfringens in the equine hindgut without adversely affecting cecal characteristics...
2017: Journal of Animal Science and Technology
https://www.readbyqxmd.com/read/28632265/3d-printed-conformal-microfluidics-for-isolation-and-profiling-of-biomarkers-from-whole-organs
#3
Manjot Singh, Yuxin Tong, Kelly Webster, Ellen Cesewski, Alexander P Haring, Sahil Laheri, Bill Carswell, Timothy J O'Brien, Charles H Aardema, Ryan S Senger, John L Robertson, Blake N Johnson
The ability to interface microfluidic devices with native complex biological architectures, such as whole organs, has the potential to shift the paradigm for the study and analysis of biological tissue. Here, we show 3D printing can be used to fabricate bio-inspired conformal microfluidic devices that directly interface with the surface of whole organs. Structured-light scanning techniques enabled the 3D topographical matching of microfluidic device geometry to porcine kidney anatomy. Our studies show molecular species are spontaneously transferred from the organ cortex to the conformal microfluidic device in the presence of fluid flow through the organ-conforming microchannel...
June 20, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28624531/the-short-to-mid-term-symptom-prevalence-of-dumping-syndrome-after-primary-gastric-bypass-surgery-and-its-impact-on-health-related-quality-of-life
#4
Marloes Emous, Bruce H R Wolffenbuttel, Eric Totté, André P van Beek
BACKGROUND: Early and late dumping are complications of gastric bypass surgery. Early dumping occurs within an hour after eating, when the emptying of food into the small intestine triggers rapid fluid shifts into the intestinal lumen and the release of gastrointestinal hormones, resulting in gastrointestinal and vasomotor symptoms. Late dumping occurs between 1 and 3 hours after carbohydrate ingestion and is caused by an exaggerated insulin release, resulting in hypoglycemia. Almost no data are currently available on the prevalence of early and late dumping or their impact on health-related quality of life (QoL)...
April 28, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28624521/semanticized-autobiographical-memory-and-the-default-executive-coupling-hypothesis-of-aging
#5
R Nathan Spreng, Amber W Lockrow, Elizabeth DuPre, Roni Setton, Karen A P Spreng, Gary R Turner
As we age, the architecture of cognition undergoes a fundamental transition. Fluid intellectual abilities decline while crystalized abilities remain stable or increase. This shift has a profound impact across myriad cognitive and functional domains, yet the neural mechanisms remain under-specified. We have proposed that greater connectivity between the default network and executive control regions in lateral prefrontal cortex may underlie this shift, as older adults increasingly rely upon accumulated knowledge to support goal-directed behavior...
June 14, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28621012/supporting-people-with-aphasia-to-settle-into-a-new-way-to-be-speech-and-language-therapists-views-on-providing-psychosocial-support
#6
Sarah Northcott, Alan Simpson, Becky Moss, Nafiso Ahmed, Katerina Hilari
BACKGROUND: People with aphasia are at risk of becoming depressed and isolated. Online surveys have found that the majority of speech and language therapists (SLTs) lack confidence in addressing the psychological needs of people with aphasia. AIMS: To explore how SLTs conceptualize the scope of their role; barriers and facilitators to SLTs addressing psychosocial needs; and SLTs' experiences of specialist training and support, and working with mental health professionals (MHPs)...
June 16, 2017: International Journal of Language & Communication Disorders
https://www.readbyqxmd.com/read/28616619/a-case-of-late-diagnosis-of-chronic-subdural-hematoma-following-spinal-anesthesia
#7
Ali Aygun, Hava Semra Vuran, Nurhak Aksut, Yunus Karaca, Ozgur Tatli
Intracranial subdural hematoma developing following spinal anesthesia is a rare but serious complication. We describe a case of subdural hematoma developing following spinal anesthesia and diagnosed late. A female patient receiving spinal anesthesia for cesarean delivery 45 days prior to arrival at the emergency department presented to our hospital with non-severe headache persisting for 45 days after discharge. Computerized tomography (CT) of the brain performed due to long-term persisting headache resistant to medical treatment and a history of spinal intervention revealed a hypodense chronic subdural hematoma in the left frontoparietal area and a shift from left to right in midline structures...
June 2017: Turkish Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28614817/shifting-focus-from-hydration-for-performance-to-hydration-for-health
#8
Erica T Perrier
Over the past 10 years, literature on hydration biomarkers has evolved considerably - from (de)hydration assessment towards a more global definition of biomarkers of hydration in daily life. This shift in thinking about hydration markers was largely driven by investigating the differences that existed between otherwise healthy individuals whose habitual, ad-libitum drinking habits differ, and by identifying physiological changes in low-volume drinkers who subsequently increase their water intake. Aside from obvious differences in urinary volume and concentration, a growing body of evidence is emerging that links differences in fluid intake with small, but biologically significant, differences in vasopressin (copeptin), glomerular filtration rate, and markers of metabolic dysfunction or disease...
2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28611153/effects-of-short-term-mild-hypercapnia-during-head-down-tilt-on-intracranial-pressure-and-ocular-structures-in-healthy-human-subjects
#9
Steven S Laurie, Gianmarco Vizzeri, Giovanni Taibbi, Connor R Ferguson, Xiao Hu, Stuart M C Lee, Robert Ploutz-Snyder, Scott M Smith, Sara R Zwart, Michael B Stenger
Many astronauts experience ocular structural and functional changes during long-duration spaceflight, including choroidal folds, optic disc edema, globe flattening, optic nerve sheath diameter (ONSD) distension, retinal nerve fiber layer thickening, and decreased visual acuity. The leading hypothesis suggests that weightlessness-induced cephalad fluid shifts increase intracranial pressure (ICP), which contributes to the ocular structural changes, but elevated ambient CO2 levels on the International Space Station may also be a factor...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28610630/osteosarcoma-of-the-lower-limb-metastasized-to-the-septum-and-right-side-of-the-heart-a-case-report
#10
Elisha Osati, Alice Kaijage, Reuben Muta, Peter Muhoka, Merckris Mango, Peter Kisenge, Bashir Nyangasa, Pedro Pallangyo, Delillah Kimambo, Mohamed Janabi
BACKGROUND: Metastatic cardiac tumors are far more common than primary tumors. Although the hematogenous spread of osteosarcoma is well known, the imaging findings of cardiovascular involvement by osteosarcoma are seldom reported and can be difficult to recognize. CASE PRESENTATION: A 21-year-old man of African descent presented to our center complaining of shortness of breath, awareness of heart beats, easy fatigability, swelling of lower limbs, and left-side chest discomfort for the past 6 months getting worse for the last 3 months prior to his third readmission...
June 13, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28602463/air-displacement-plethysmography-versus-bioelectrical-impedance-to-determine-body-composition-in-pediatric-hemodialysis-patients
#11
Molly Wong Vega, Poyyapakkam R Srivaths
OBJECTIVE: Protein energy wasting is difficult to assess in pediatric hemodialysis (HD) populations because of fluid shifts. Body composition (BC) analysis aids in monitoring nutrition therapy's effects on fat and lean mass. Air displacement plethysmography (ADP) is a "practical" gold standard for fat mass (FM) measurements. We aim to compare BC measures in a pediatric HD population via anthropometry, ADP, and bioelectrical impedance (BIA). DESIGN: The study was prospective cohort study and the setting was 1 pediatric HD unit in Houston, Texas...
June 8, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/28600534/intracranial-fluid-redistribution-but-no-white-matter-microstructural-changes-during-a-spaceflight-analog
#12
Vincent Koppelmans, Ofer Pasternak, Jacob J Bloomberg, Yiri E De Dios, Scott J Wood, Roy Riascos, Patricia A Reuter-Lorenz, Igor S Kofman, Ajitkumar P Mulavara, Rachael D Seidler
The neural correlates of spaceflight-induced sensorimotor impairments are unknown. Head down-tilt bed rest (HDBR) serves as a microgravity analog because it mimics the headward fluid shift and axial body unloading of spaceflight. We investigated focal brain white matter (WM) changes and fluid shifts during 70 days of 6° HDBR in 16 subjects who were assessed pre (2x), during (3x), and post-HDBR (2x). Changes over time were compared to those in control subjects (n = 12) assessed four times over 90 days. Diffusion MRI was used to assess WM microstructure and fluid shifts...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28596574/estimation-of-the-thermocapillary-force-and-its-applications-to-precise-droplet-control-on-a-microfluidic-chip
#13
By June Won, Wooyoung Lee, Simon Song
Droplet control through the use of light-induced thermocapillary effects has recently garnered attention due to its non-intrusive and multifunctional nature. An important issue in droplet control is the estimation of the thermocapillary force. The purpose of the present study is to estimate the thermocapillary force and propose empirical equations between the force and simply measurable key parameters such as droplet diameter and power of heat source. In addition, we aim to shift the droplet trajectory and develop an on-demand droplet routing system based on the estimation of the thermocapillary force...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28591008/plasma-resuscitation-improved-survival-in-a-cecal-ligation-and-puncture-rat-model-of-sepsis
#14
Ronald Chang, John B Holcomb, Par I Johansson, Shibani Pati, Martin A Schreiber, Charles E Wade
BACKGROUND: The paradigm shift from crystalloid to plasma resuscitation of traumatic hemorrhagic shock has improved patient outcomes due in part to plasma-mediated reversal of catecholamine and inflammation-induced endothelial injury, decreasing vascular permeability and attenuating organ injury. Since sepsis induces a similar endothelial injury as seen in hemorrhage, we hypothesized that plasma resuscitation would increase 48-hour survival in a rat sepsis model. METHODS: Adult male Sprague-Dawley rats (375-425 g) were subjected to 35% cecal ligation and puncture (CLP) (t = 0 h)...
June 6, 2017: Shock
https://www.readbyqxmd.com/read/28587389/comparison-of-the-hemodynamics-and-dynamics-of-fluid-shift-of-ringer-s-solution-before-surgery-in-children-and-adults
#15
Guizhou Zhu, Yuhong Li, Guomei Ru, Qiannan Ding
The present study investigated the hemodynamics, vascular and extravascular volume expansion induced by infusion of lactated Ringer's solution in children and adults before surgery. This was a prospective randomized double-blind study. A total of 28 patients (14 children and 14 adult patients; American Society of Anesthesiology status I) scheduled for similar minor pelvic, anal rectal or lower limb surgery were recruited for the present study. All patients were administered with 10 ml/kg of lactated Ringer's solution at a constant rate over 20 min...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28586146/locating-the-level-and-extent-of-congenital-high-airway-obstruction-fluid-in-the-airway-tract-as-reference-points
#16
Mamatha Gowda, Shilpa Gupta, Ashraf Ali, Shanthi Paranthaman
Described here are a series of four cases of congenital high airway obstruction in the fetus. All of the patients presented in the second trimester and all had hydrops fetalis. Three cases had bilateral hyperinflated lungs, midline shift of heart, flattening or inversion of the diaphragm, and fetal ascites. Autopsy was performed in one of these three and showed laryngeal atresia. In one fetus, there was only a unilateral huge enlargement of the lung with mediastinal shift. On autopsy, this fetus had atresia of right main bronchus...
June 6, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28580357/impact-of-compression-stockings-vs-continuous-positive-airway-pressure-on-overnight-fluid-shift-and-obstructive-sleep-apnea-among-patients-on-hemodialysis
#17
Bruno C Silva, Roberto S S Santos, Luciano F Drager, Fernando M Coelho, Rosilene M Elias
INTRODUCTION: Obstructive sleep apnea (OSA) is common in edematous states, notably in hemodialysis patients. In this population, overnight fluid shift can play an important role on the pathogenesis of OSA. The effect of compression stockings (CS) and continuous positive airway pressure (CPAP) on fluid shift is barely known. We compared the effects of CS and CPAP on fluid dynamics in a sample of patients with OSA in hemodialysis, through a randomized crossover study. METHODS: Each participant performed polysomnography (PSG) at baseline, during CPAP titration, and after 1 week of wearing CS...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28579938/the-connected-steady-state-model-and-the-interdependence-of-the-csf-proteome-and-csf-flow-characteristics
#18
Fabian Metzger, Daniel Mischek, Frédéric Stoffers
Here we show that the hydrodynamic radii-dependent entry of blood proteins into cerebrospinal fluid (CSF) can best be modeled with a diffusional system of consecutive interdependent steady states between barrier-restricted molecular flux and bulk flow of CSF. The connected steady state model fits precisely to experimental results and provides the theoretical backbone to calculate the in-vivo hydrodynamic radii of blood-derived proteins as well as individual barrier characteristics. As the experimental reference set we used a previously published large-scale patient cohort of CSF to serum quotient ratios of immunoglobulins in relation to the respective albumin quotients...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28579732/impact-of-e-%C3%A3-b-shear-flow-on-low-n-mhd-instabilities
#19
J G Chen, X Q Xu, C H Ma, P W Xi, D F Kong, Y A Lei
Recently, the stationary high confinement operations with improved pedestal conditions have been achieved in DIII-D [K. H. Burrell et al., Phys. Plasmas 23, 056103 (2016)], accompanying the spontaneous transition from the coherent edge harmonic oscillation (EHO) to the broadband MHD turbulence state by reducing the neutral beam injection torque to zero. It is highly significant for the burning plasma devices such as ITER. Simulations about the effects of E × B shear flow on the quiescent H-mode (QH-mode) are carried out using the three-field two-fluid model in the field-aligned coordinate under the BOUT++ framework...
May 2017: Physics of Plasmas
https://www.readbyqxmd.com/read/28579535/distributional-shift-of-urea-production-site-from-the-extraembryonic-yolk-sac-membrane-to-the-embryonic-liver-during-the-development-of-cloudy-catshark-scyliorhinus-torazame
#20
Wataru Takagi, Makiko Kajimura, Hironori Tanaka, Kumi Hasegawa, Shuntaro Ogawa, Susumu Hyodo
Urea is an essential osmolyte for marine cartilaginous fishes. Adult elasmobranchs and holocephalans are known to actively produce urea in the liver, muscle and other extrahepatic organs; however, osmoregulatory mechanisms in the developing cartilaginous fish embryo with an undeveloped urea-producing organ are poorly understood. We recently described the contribution of extraembryonic yolk sac membranes (YSM) to embryonic urea synthesis during the early developmental period of the oviparous holocephalan elephant fish (Callorhinchus milii)...
June 1, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
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