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https://www.readbyqxmd.com/read/29221408/exploring-a-multi-scale-method-for-molecular-simulation-in-continuum-solvent-model-explicit-simulation-of-continuum-solvent-as-an-incompressible-fluid
#1
Li Xiao, Ray Luo
We explored a multi-scale algorithm for the Poisson-Boltzmann continuum solvent model for more robust simulations of biomolecules. In this method, the continuum solvent/solute interface is explicitly simulated with a numerical fluid dynamics procedure, which is tightly coupled to the solute molecular dynamics simulation. There are multiple benefits to adopt such a strategy as presented below. At this stage of the development, only nonelectrostatic interactions, i.e., van der Waals and hydrophobic interactions, are included in the algorithm to assess the quality of the solvent-solute interface generated by the new method...
December 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29220757/association-between-postoperative-fluid-balance-and-acute-kidney-injury-in-patients-after-cardiac-surgery-a-retrospective-cohort-study
#2
Yanfei Shen, Weimin Zhang, Xuping Cheng, Manzhen Ying
PURPOSE: The present study aims to explore appropriate postoperative fluid management in patients after cardiac surgery. MATERIALS AND METHODS: Data were extracted from an online database. Associations between fluid balance (FB), fluid intake and mortality were investigated. RESULTS: Compared to zero FB (level 3), more negative FB (level 1, odds ratio (OR): 0.938, 95% CI: 0.631-1.394; level 2, OR: 0.921, 95% CI: 0.709-1.196) could not further decrease AKI incidence while positive FB was associated with higher AKI incidence (level 4, OR: 1...
December 1, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29218312/potassium-homeostasis-oxidative-stress-and-human-disease
#3
Udensi K Udensi, Paul B Tchounwou
Potassium is the most abundant cation in the intracellular fluid and it plays a vital role in the maintenance of normal cell functions. Thus, potassium homeostasis across the cell membrane, is very critical because a tilt in this balance can result in different diseases that could be life threatening. Both Oxidative stress (OS) and potassium imbalance can cause life threatening health conditions. OS and abnormalities in potassium channel have been reported in neurodegenerative diseases. This review highlights the major factors involved in potassium homeostasis (dietary, hormonal, genetic, and physiologic influences), and discusses the major diseases and abnormalities associated with potassium imbalance including hypokalemia, hyperkalemia, hypertension, chronic kidney disease, and Gordon's syndrome, Bartter syndrome, and Gitelman syndrome...
2017: International Journal of Clinical and Experimental Physiology
https://www.readbyqxmd.com/read/29217231/risk-factors-for-radial-to-femoral-artery-pressure-gradient-in-patients-undergoing-cardiac-surgery-with-cardiopulmonary-bypass
#4
Vincent Bouchard-Dechêne, Pierre Couture, Antonio Su, Alain Deschamps, Yoan Lamarche, Georges Desjardins, Sylvie Levesque, André Y Denault
OBJECTIVE: To identify risk factors associated with radial-to-femoral pressure gradient during cardiac surgery with cardiopulmonary bypass (CPB). DESIGN: This is a retrospective, observational study. SETTING: Single specialized cardiothoracic hospital in Montreal, Canada. PARTICIPANTS: Consecutive patients that underwent heart surgery with CPB between 2005 and 2015 (n = 435). INTERVENTIONS: None...
September 15, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29215277/review-of-the-scientific-understanding-of-radioactive-waste-at-the-u-s-doe-hanford-site
#5
Reid A Peterson, Edgar C Buck, Jaehun Chun, Richard C Daniel, Daniel L Herting, Eugene S Ilton, Gregg J Lumetta, Sue B Clark
This paper reviews the origin and chemical and rheological complexity of radioactive waste at the U.S. Department of Energy Hanford Site. The waste, stored in underground tanks, was generated via three distinct processes over decades of plutonium extraction operations. Although close records were kept of original waste disposition, tank-to-tank transfers and conditions that impede equilibrium complicate our understanding of the chemistry, phase composition, and rheology of the waste. Tank waste slurries comprise particles and aggregates from nano to micron scales, with varying densities, morphologies, heterogeneous compositions, and complicated responses to flow regimes and process conditions...
December 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29212765/changes-in-the-fluid-volume-balance-between-intra-and-extracellular-water-in-a-sample-of-japanese-adults-aged-15-88-years-old-a-cross-sectional-study
#6
Yasushi Ohashi, Nobuhiko Joki, Keisuke Yamazaki, Takeshi Kawamura, Reibin Tai, Hideyo Oguchi, Rena Yuasa, Ken Sakai
The fluid volume balance between intracellular water (ICW) and extracellular water (ECW) gradually changes with age and various medical conditions. Comprehension of these physiological changes would aid in clinical decision-making related to body fluid assessments. A total of 1,992 individuals (753 men and 1,239 women) aged ≥15 years included in this study had their body composition measurements performed at training gyms in 2014. We developed a regression formula to assess the association of age with the ratio of ECW to ICW in these subjects...
December 6, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29211803/hypoxia-and-inactivity-related-physiological-changes-precede-or-take-place-in-absence-of-significant-rearrangements-in-bacterial-community-structure-the-planhab-randomized-trial-pilot-study
#7
Robert Šket, Nicole Treichel, Susanne Kublik, Tadej Debevec, Ola Eiken, Igor Mekjavić, Michael Schloter, Marius Vital, Jenna Chandler, James M Tiedje, Boštjan Murovec, Zala Prevoršek, Matevž Likar, Blaž Stres
We explored the assembly of intestinal microbiota in healthy male participants during the randomized crossover design of run-in (5 day) and experimental phases (21-day normoxic bed rest (NBR), hypoxic bed rest (HBR) and hypoxic ambulation (HAmb) in a strictly controlled laboratory environment, with balanced fluid and dietary intakes, controlled circadian rhythm, microbial ambiental burden and 24/7 medical surveillance. The fraction of inspired O2 (FiO2) and partial pressure of inspired O2 (PiO2) were 0.209 and 133...
2017: PloS One
https://www.readbyqxmd.com/read/29210960/dislodgement-of-fluocinolone-acetonide-intravitreal-implant-into-the-infusion-cannula-during-vitrectomy-for-retinal-detachment
#8
Walter Andreatta, Ibrahim Elaraoud, Arijit Mitra
BACKGROUND/PURPOSE: To report a case of dislodgement of an Iluvien (fluocinolone acetonide) intravitreal implant into the infusion cannula during pars plana vitrectomy for retinal detachment. METHODS: The patient's surgery was video recorded, and the medical notes were reviewed retrospectively. RESULTS: A patient developed a macula off retinal detachment over 1 year after intravitreal injection of Iluvien for diabetic maculopathy. The patient underwent pars plana vitrectomy, removal of implant, and successful retinal reattachment...
November 23, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/29210843/intraoperative-hypotension-is-associated-with-acute-kidney-injury-in-noncardiac-surgery-an-observational-study
#9
Linn Hallqvist, Fredrik Granath, Elin Huldt, Max Bell
BACKGROUND: Perioperative acute kidney injury (AKI) is common and increases the risk of morbidity and mortality. OBJECTIVES: To determine the association between intraoperative hypotension, defined as an individual decrease from baseline and the risk of perioperative AKI. DESIGN: Observational cohort study. SETTING: Karolinska University Hospital, Stockholm, Sweden, from October 2012 to May 2013 and October 2015 and April 2016...
November 27, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29210307/amniotic-fluid-oxidant-antioxidant-status-in-foetal-congenital-nervous-system-anomalies
#10
Numan Cim, Harun Egemen Tolunay, Erbil Karaman, Barıs Boza, Mustafa Bilici, Orkun Çetin, Recep Yıldızhan, Hanım Guler Sahin
Objective This study aimed to evaluate the oxidant-antioxidant status of amniotic fluid in pregnant women with foetal congenital malformations of the central nervous system. Methods We studied pregnant women with foetal congenital nervous system anomalies at 16-22 weeks' gestation (n = 36). The control group (n = 30) consisted of pregnant women at the same gestational age who underwent amniocentesis, resulting in a normal karyotype. We analysed glutathione, catalase, and malondialdehyde levels in amniotic fluid...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/29210124/a-novel-herbal-composition-containing-extracts-of-boswellia-serrata-gum-resin-and-aegle-marmelos-fruit-alleviates-symptoms-of-asthma-in-a-placebo-controlled-double-blind-clinical-study
#11
Pothina Yugandhar, Konda Manikyeswara Rao, Krishanu Sengupta
LI13109F is a novel herbal composition containing the extracts of Boswellia serrata gum resin and Aegle marmelos fruit. This composition dampens leukotriene dependent inflammatory reactions via inhibiting 5-lipoxygenase pathway. In a Sephadex LH-20 induced airway inflammation model of Sprague Dawley rats, LI13109F significantly reduced infiltrated granulocyte population in the bronco-alveolar lavage fluid and normalized Th1/Th2 cytokine balance. Further, a 56-day placebo-controlled and randomized double blind study (Clinical Trial Registration No...
December 6, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29205784/thoracic-epidural-analgesia-in-donor-hepatectomy-an-analysis
#12
Archna Koul, Deepanjali Pant, Swetha Rudhravaram, Jayashree Sood
BACKGROUND: To analyze whether supplementation of general anaesthesia with thoracic epidural analgesia (TEA) for right lobe donor hepatectomy is a safe modality of pain relief in terms of changes in postoperative coagulation profile, incidence of epidural catheter related complications and timing of removal of epidural catheter. METHODS: Retrospective analysis of the record of 104 patients who received TEA for right lobe donor hepatectomy was done. Platelet count, INR, ALT and AST were recorded postoperatively till the removal of the epidural catheter...
December 2, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/29202301/spleen-tyrosine-kinase-inhibition-ameliorates-airway-inflammation-through-modulation-of-nlrp3-inflammosome-and-th17-treg-axis
#13
Divyesh Patel, Sagar Gaikwad, Naveen Challagundla, Manish Nivsarkar, Reena Agrawal-Rajput
Repeated exposure to the fungal pathogen Aspergillus fumigates triggers spleen tyrosine kinase (SYK) signalling through dectin-1 activation, which is associated with deleterious airway inflammation. β-Glucan-induced dectin-1 signalling activates the NLRP3 inflammasome, which in turn rapidly produces IL-1β, a master regulator of inflammation. IL-1β expression results in Th17/Treg imbalance, pulmonary inflammation, and bystander tissue injury. This study reports that 3,4 methylenedioxy-β-nitrostyrene (MNS), a potent SYK inhibitor, markedly decreased the expression of pro-inflammatory cytokines and increased the expression of anti-inflammatory cytokines in vitro...
December 1, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29202257/maintenance-fluid-practices-in-paediatric-intensive-care-units-in-australia-and-new-zealand
#14
Shailesh Bihari, Ben Gelbart, Ian Seppelt, Kelly Thompson, Nicola Watts, Shivesh Prakash, Marino Festa, Andrew Bersten
BACKGROUND: Maintenance fluid administration is a common practice in paediatric intensive care units (PICUs), contributing to daily fluid intake and fluid balance, but little is known about this practice. OBJECTIVES: To determine the volume and type of maintenance fluid delivered to PICU patients, and to assess changes in practice compared with a previous time point. METHODS: A prospective, observational, single-day, point prevalence study of paediatric patients from 11 Australian and New Zealand PICUs, conducted in 2014...
December 2017: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
https://www.readbyqxmd.com/read/29200369/anesthetic-management-of-a-patient-with-a-history-of-rhabdomyolysis-for-dental-treatment
#15
Hitomi Terasaki, Shinichi Ito
When general anesthesia is administered for patients considered at high risk for rhabdomyolysis, appropriate precautions are warranted. The use of suitable anesthetics, with attention to intravenous fluid management, electrolyte balance, respiration, and metabolism, should be addressed. We performed general anesthesia for dental treatment and biopsy for fibrous hyperplasia of the buccal mucosa in a patient with a history of rhabdomyolysis. We utilized thiamylal sodium, midazolam, rocuronium bromide, nitrous oxide, fentanyl, and remifentanil without using volatile anesthetics and propofol for this case...
2017: Anesthesia Progress
https://www.readbyqxmd.com/read/29199540/is-the-use-of-hydroxyethyl-starch-as-priming-solution-during-cardiac-surgery-advisable-a-randomized-single-center-trial
#16
Øyvind S Svendsen, Marit Farstad, Arve Mongstad, Rune Haaverstad, Paul Husby, Venny L Kvalheim
INTRODUCTION: The use of cardiopulmonary bypass (CPB) leads to increased fluid filtration and edema. The use of artificial colloids to counteract fluid extravasation during cardiac surgery is controversial. Beneficial effects on global fluid loading, leading to better cardiac performance and hemodynamics, have been claimed. However, renal function and coagulation may be adversely affected, with unfavorable impact on outcome following cardiac surgery. METHODS: Forty patients were randomly allocated to study groups receiving either acetated Ringer's solution (CT group) or hydroxyethyl starch (HES group, Tetraspan®) as CPB priming solution...
December 1, 2017: Perfusion
https://www.readbyqxmd.com/read/29198854/efficacy-and-safety-of-transversus-abdominis-plane-blocks-versus-thoracic-epidural-anesthesia-in-patients-undergoing-major-abdominal-oncologic-resections-a-prospective-randomized-controlled-trial
#17
Tamer M Shaker, Joseph T Carroll, Mathew H Chung, Tracy J Koehler, Brian R Lane, Andrea M Wolf, G Paul Wright
BACKGROUND: The purpose of this study was to compare patient outcomes for thoracic epidural anesthesia (TEA) with transversus abdominis plane (TAP) blocks. METHODS: A prospective, randomized trial was performed for patients undergoing abdominal oncologic surgeries. RESULTS: There were 32 TAP and 35 TEA subjects. The TEA group demonstrated increased episodes of hypotension in the first 24 h (3 v 0.6, p = 0.02). There was no difference in 24-48 h fluid balance between the groups...
November 16, 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/29198517/choice-of-resuscitative-fluids-and-mortality-in-emergency-department-patients-with-sepsis
#18
Monica Sethi, Clark G Owyang, Chad Meyers, Ram Parekh, Kaushal H Shah, Alex F Manini
OBJECTIVE: Balanced resuscitative fluids (BF) have been associated with decreased incidence of hyperchloremic metabolic acidosis in sepsis. We hypothesized that higher proportions of BF during resuscitation would thus be associated with improved mortality in Emergency Department (ED) patients with sepsis. METHODS: This was a retrospective chart review of adult ED patients who presented with sepsis to a large, urban teaching hospital over one year. The choice of resuscitation fluid in the first 2days of hospitalization was defined as either normal saline (NS) or balanced fluids (BF; Lactated Ringer's or Isolyte)...
October 7, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29197350/effect-of-hyperchloremia-on-acute-kidney-injury-in-critically-ill-septic-patients-a-retrospective-cohort-study
#19
Lenar Yessayan, Javier A Neyra, Fabrizio Canepa-Escaro, George Vasquez-Rios, Michael Heung, Jerry Yee
BACKGROUND: Hyperchloremia is common in critically ill septic patients. The impact of hyperchloremia on the incidence of acute kidney injury (AKI) is not well studied. We investigated the association between hyperchloremia and AKI within the first 72 h of intensive care unit (ICU) admission. METHODS: 6490 ICU adult patients admitted with severe sepsis or septic shock were screened for eligibility. Exclusion criteria included: AKI on admission, baseline estimated glomerular filtration rate (eGFR) <15 ml/min/1...
December 2, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/29197340/clinical-significance-and-risk-factors-for-new-onset-and-recurring-atrial-fibrillation-following-cardiac-surgery-a-retrospective-data-analysis
#20
Hristo Todorov, Inka Janssen, Stefanie Honndorf, Daniela Bause, Antje Gottschalk, Silke Baasner, Thomas Volkert, Valentin Faerber, John F Stover, Martin Westphal, Björn Ellger
BACKGROUND: Although mortality after cardiac surgery has significantly decreased in the last decade, patients still experience clinically relevant postoperative complications. Among others, atrial fibrillation (AF) is a common consequence of cardiac surgery, which is associated with prolonged hospitalization and increased mortality. METHODS: We retrospectively analyzed data from patients who underwent coronary artery bypass grafting, valve surgery or a combination of both at the University Hospital Muenster between April 2014 and July 2015...
December 2, 2017: BMC Anesthesiology
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