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https://www.readbyqxmd.com/read/29783879/effects-of-sodium-citrate-citric-acid-and-lactic-acid-on-human-blood-coagulation
#1
Vittorio Scaravilli, Luca Di Girolamo, Eleonora Scotti, Mattia Busana, Osvaldo Biancolilli, Patrizia Leonardi, Andrea Carlin, Caterina Lonati, Mauro Panigada, Antonio Pesenti, Alberto Zanella
INTRODUCTION: Citric acid infusion in extracorporeal blood may allow concurrent regional anticoagulation and enhancement of extracorporeal CO2 removal. Effects of citric acid on human blood thromboelastography and aggregometry have never been tested before. METHODS: In this in vitro study, citric acid, sodium citrate and lactic acid were added to venous blood from seven healthy donors, obtaining concentrations of 9 mEq/L, 12 mEq/L and 15 mEq/L. We measured gas analyses, ionized calcium (iCa++ ) concentration, activated clotting time (ACT), thromboelastography and multiplate aggregometry...
May 1, 2018: Perfusion
https://www.readbyqxmd.com/read/29782214/physiologic-changes-in-a-small-animal-model-for-neonatal-minimally-invasive-surgery
#2
Steffi Mayer, Nicole Peukert, Richard Gnatzy, Jan-Hendrik Gosemann, Martin Lacher, Anne Suttkus
BACKGROUND: Minimally invasive surgery (MIS) has gained increasing importance in neonatal surgery but the effects on neonatal physiology remain unclear. We aimed to characterize the impact of capnoperitoneum on physiologic parameters in a small animal model for neonatal MIS. MATERIAL AND METHODS: Twenty-four 10-day-old Sprague Dawley rats underwent inhalative anesthesia (1% isoflurane in 100% O2 250 mL/minutes) and were allowed to breathe spontaneously. CO2 was insufflated into the abdominal cavity for 1 hour via a 24G cannula...
May 21, 2018: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/29763713/practice-of-mechanical-ventilation-in-cardiac-arrest-patients-and-effects-of-targeted-temperature-management-a-substudy-of-the-targeted-temperature-management-trial
#3
Matthew B A Harmon, David M P van Meenen, Annelou L I P van der Veen, Jan M Binnenkade, Josef Dankiewicz, Florian Ebner, Niklas Nielsen, Paolo Pelosi, Marcus J Schultz, Janneke Horn, Hans Friberg, Nicole P Juffermans
AIMS: Mechanical ventilation practices in patients with cardiac arrest are not well described. Also, the effect of temperature on mechanical ventilation settings is not known. The aims of this study were 1) to describe practice of mechanical ventilation and its relation with outcome 2) to determine effects of different target temperatures strategies (33 °C versus 36 °C) on mechanical ventilation settings. METHODS: This is a substudy of the TTM-trial in which unconscious survivors of a cardiac arrest due to a cardiac cause were randomized to two TTM strategies, 33 °C (TTM33) and 36 °C (TTM36)...
May 12, 2018: Resuscitation
https://www.readbyqxmd.com/read/29755961/correlation-and-interchangeability-of-venous-and-capillary-blood-gases-in-non-critically-ill-neonates
#4
Ratna N G B Tan, Steffen C Pauws, Evelyne van Loon, Vivanne E H J Smits, Enrico Lopriore, Arjan B Te Pas
Background: Venous blood gas (VBG) is frequently used in the neonatal unit as alternative for capillary blood gas (CBG). However, studies reporting correlation are conflicting and data on interchangeability in neonates are lacking. Objective: We investigated the correlation and interchangeability of the components between VBG and CBG in infants admitted to the neonatal intensive care unit. Methods: In a prospective study in the neonatal unit in Leiden University Medical Center (Netherlands), simultaneously VBG and CBG were withdrawn in neonates when both venous puncture and intravenous access as blood gas monitoring was indicated...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29745803/the-bohr-haldane-effect-a-model-based-uncovering-of-the-full-extent-of-its-impact-on-o-2-delivery-to-and-co-2-removal-from-tissues
#5
Hans Malte, Gunnar Lykkeboe
For a century the influence of the Bohr effect on the utilization of blood borne oxygen has been deemed secondary to its influence on the uptake of carbon dioxide by the blood. Here we show that the opposite is the case. Using a simple two-ligand, two-state formulation we modelled the simultaneous oxygen and proton binding to hemoglobin as well as the resulting acid-base changes of the surrounding solution. Blocking of the Bohr effect in this model system results in a dramatic increase in the oxygen affinity, as expressed by the oxygen partial pressure at half saturation, the P50 ...
May 10, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29739983/acute-physiology-and-neurologic-outcomes-after-brain-injury-in-scop-phlpp1-ko-mice
#6
Travis C Jackson, C Edward Dixon, Keri Janesko-Feldman, Vincent Vagni, Shawn E Kotermanski, Edwin K Jackson, Patrick M Kochanek
Suprachiasmatic nucleus circadian oscillatory protein (SCOP) (a.k.a. PHLPP1) regulates long-term memory consolidation in the brain. Using a mouse model of controlled cortical impact (CCI) we tested if (1) brain tissue levels of SCOP/PHLPP1 increase after a traumatic brain injury (TBI), and (2) if SCOP/PHLPP1 gene knockout (KO) mice have improved (or worse) neurologic outcomes. Blood chemistry (pH, pCO2 , pO2 , pSO2 , base excess, sodium bicarbonate, and osmolarity) and arterial pressure (MAP) differed in isoflurane anesthetized WT vs...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29738607/ultra-bright-red-emitting-photostable-perylene-bisimide-dyes-new-indicators-for-ratiometric-sensing-of-high-ph-or-carbon-dioxide
#7
David Pfeifer, Ingo Klimant, Sergey M Borisov
New pH sensitive perylene bisimide indicator dyes were synthesised and used for fabrication of optical sensors. The highly photostable dyes show absorption/emission bands in the red/near-infrared (NIR) region of the electromagnetic spectrum, high molar absorption coefficients (up to 100 000 M-1 cm-1) and fluorescence quantum yields close to unity. The absorption and emission spectra show strong bathochromic shift upon deprotonation of imidazole nitrogen which makes the dyes promising as ratiometric fluorescent indicators...
May 8, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29736100/systemic-inflammatory-response-syndrome-in-surgical-patients
#8
Jasmina Smajic, Lejla Rakovac Tupkovic, Samir Husic, Selma Sijercic Avdagic, Samir Hodzic, Semir Imamovic
Objective: To determine the incidence of systemic inflammatory response of the organism in surgical patients and its impact on the outcome of treatment. Methods: A prospective study was conducted on 60 patients undergoing abdominal surgical procedures, between January 2014 and December 2015 in the Surgery Clinic at the University Clinical Center Tuzla. Two groups of thirty were formed by the method of consecutive sampling. The first group consisted of subjects who were prepared for elective abdominal surgery (laparoscopic cholecystectomy), and the second group subjects underwent an emergency surgery due to acute abdomen (laparoscopic cholecystectomy)...
April 2018: Medical Archives
https://www.readbyqxmd.com/read/29727774/effects-of-environmental-stressors-on-lipid-metabolism-in-aquatic-invertebrates
#9
Min-Chul Lee, Jun Chul Park, Jae-Seong Lee
Lipid metabolism is crucial for the survival and propagation of the species, since lipids are an essential cellular component across animal taxa for maintaining homeostasis in the presence of environmental stressors. This review aims to summarize information on the lipid metabolism under environmental stressors in aquatic invertebrates. Fatty acid synthesis from glucose via de novo lipogenesis (DNL) pathway is mostly well-conserved across animal taxa. The structure of free fatty acid (FFA) from both dietary and DNL pathway could be transformed by elongase and desaturase...
April 25, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29723676/towards-optimal-intraoperative-conditions-in-esophageal-surgery-a-review-of-literature-for-the-prevention-of-esophageal-anastomotic-leakage
#10
REVIEW
Boukje Titia Bootsma, Daitlin Esmee Huisman, Victor Dirk Plat, Linda Jeanne Schoonmade, Jurre Stens, Guy Hubens, Donald Leonard van der Peet, Freek Daams
BACKGROUND: Esophageal anastomotic leakage (EAL) is a severe complication following gastric and esophageal surgery for cancer. Several non-modifiable, patient or surgery related risk factors for EAL have been identified, however, the contribution of modifiable intraoperative parameters remains undetermined. This review provides an overview of current literature on potentially modifiable intraoperative risk factors for EAL. MATERIALS AND METHODS: The PubMed, EMBASE and Cochrane databases were searched by two researchers independently...
April 30, 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29719166/paleobotany-and-global-change-important-lessons-for-species-to-biomes-from-vegetation-responses-to-past-global-change
#11
Jennifer C McElwain
Human carbon use during the next century will lead to atmospheric carbon dioxide concentrations (pCO2 ) that have been unprecedented for the past 50-100+ million years according to fossil plant-based CO2 estimates. The paleobotanical record of plants offers key insights into vegetation responses to past global change, including suitable analogs for Earth's climatic future. Past global warming events have resulted in transient poleward migration at rates that are equivalent to the lowest climate velocities required for current taxa to keep pace with climate change...
April 29, 2018: Annual Review of Plant Biology
https://www.readbyqxmd.com/read/29716758/distal-renal-tubular-acidosis-in-two-children-with-acquired-hypothyroidism
#12
Norma E Guerra-Hernández, Karen V Ordaz-López, Rosa Vargas-Poussou, Laura Escobar-Pérez, Víctor M García-Nieto
Two cases of children diagnosed with renal tubular acidosis (RTA) associated with autoimmune hypothyroidism are presented. Case 1 developed an intestinal ileus at the age of five in the context of a respiratory problem. The tests performed confirmed metabolic acidosis, hyperchloraemia, hypokalaemia and nephrocalcinosis. Case 2 was diagnosed with hypothyroidism at the age of 11, and with RTA two years later. In both patients, the diagnosis of RTA was verified when decreased maximum urinary pCO2 was found. In case 2, a proximal bicarbonate leak (type 3 RTA) was also confirmed...
April 28, 2018: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/29715178/national-surveys-on-internal-quality-control-for-blood-gas-analysis-and-related-electrolytes-in-clinical-laboratories-of-china
#13
Min Duan, Wei Wang, Haijian Zhao, Chuanbao Zhang, Falin He, Kun Zhong, Shuai Yuan, Zhiguo Wang
BACKGROUND: Internal quality control (IQC) is essential for precision evaluation and continuous quality improvement. This study aims to investigate the IQC status of blood gas analysis (BGA) in clinical laboratories of China from 2014 to 2017. METHODS: IQC information on BGA (including pH, pCO2, pO2, Na+, K+, Ca2+, Cl-) was submitted by external quality assessment (EQA) participant laboratories and collected through Clinet-EQA reporting system in March from 2014 to 2017...
May 1, 2018: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29712484/does-prenatal-diagnosis-of-critical-congenital-heart-diseases-influence-the-prereferral-mortality-in-a-center-without-surgical-intervention
#14
Buse Özer Bekmez, Evrim Alyamaç Dizdar, Nilüfer Okur, Mehmet Büyüktiryaki, Nurdan Uraş, Serife Suna Oğuz
BACKGROUND: Prenatal diagnosis ameliorates some preoperative and postoperative outcomes in critical congenital heart disease (CHD). Despite large variability among anatomical defect types, nearly half of them are diagnosed antenatally. We aimed to investigate the effect of the antenatal diagnosis on prereferral mortality of infants with critical CHD in a center without cardiovascular surgery clinic. METHODS: Medical records of the neonates who were diagnosed with critical CHD between the years 2010 and 2016 in Zekai Tahir Burak Women's health Education and Research Hospital were retrospectively reviewed for the study...
April 30, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29707346/a-comparison-between-two-lung-ventilation-with-co-2-artificial-pneumothorax-and-one-lung-ventilation-during-thoracic-phase-of-minimally-invasive-esophagectomy
#15
Miao Lin, Yaxing Shen, Hao Wang, Yong Fang, Cheng Qian, Songtao Xu, Di Ge, Mingxiang Feng, Lijie Tan, Qun Wang
Background: To investigate the feasibility and safety of two lung ventilation with artificial pneumothorax in minimally invasive esophagectomy (MIE) through a comparison with conventional one lung ventilation. Methods: Eleven hundred and sixty-six patients with esophageal cancer, who underwent McKeown MIE in our center from February 2006 to December 2016, were studied retrospectively. Seven hundred and five patients who underwent one lung ventilation with double lumen endotracheal tube (DLET) were assigned to DLET group...
March 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29701244/calcification-moderates-the-increased-susceptibility-to-uv-radiation-of-the-coccolithophorid-gephryocapsa-oceanica-grown-under-elevated-co-2-concentration-evidence-based-on-calcified-and-non-calcified-cells
#16
Hangbin Miao, John Beardall, Kunshan Gao
The physiological performance of calcified and non-calcified cells of Gephyrocapsa oceanica (NIES-1318) and their short-term responses to UV radiation were compared for cultures grown under present-day (LC, 400 μatm) and high pCO2 (HC, 1000 μatm) conditions. Similar growth rates and Fv / Fm values were observed in both types of cell under LC conditions, indicating that the loss of calcification in the non-calcified cell did not lead to a competitive disadvantage under such conditions. Detrimental effects of elevated pCO2 were observed in both cell types, with the growth rate of non-calcified cells decreasing more markedly, which might reflect a negative impact of higher cytoplasmic H+ ...
April 27, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29694804/shifting-balance-of-protein-synthesis-and-degradation-sets-a-threshold-for-larval-growth-under-environmental-stress
#17
Christina A Frieder, Scott L Applebaum, T-C Francis Pan, Donal T Manahan
Exogenous environmental factors alter growth rates, yet information remains scant on the biochemical mechanisms and energy trade-offs that underlie variability in the growth of marine invertebrates. Here we study the biochemical bases for differential growth and energy utilization (as adenosine triphosphate [ATP] equivalents) during larval growth of the bivalve Crassostrea gigas exposed to increasing levels of experimental ocean acidification (control, middle, and high pCO2 , corresponding to ∼400, ∼800, and ∼1100 µatm, respectively)...
February 2018: Biological Bulletin
https://www.readbyqxmd.com/read/29694365/a-preliminary-investigation-into-the-early-embryo-death-syndrome-eeds-at-the-world-s-largest-green-turtle-rookery
#18
David Terrington Booth, Andrew Dunstan
Raine Island hosts the largest nesting aggregation of green turtles in the world, but nest emergence success and hence recruitment of hatchlings off the beach appear to have significantly declined since the 1990s. Nests destroyed by subsequent nesting turtles, and nest failure due to flooding account for most of the nest failure, but many nests still have poor hatch success even when undisturbed and flood-free. In undisturbed, flood-free nests that experience high mortality, embryos typically die at a very early stage of development, a phenomenon we term early embryo death syndrome (EEDS)...
2018: PloS One
https://www.readbyqxmd.com/read/29694353/the-influence-of-abrupt-increases-in-seawater-pco2-on-plankton-productivity-in-the-subtropical-north-pacific-ocean
#19
Donn A Viviani, Daniela Böttjer, Ricardo M Letelier, Matthew J Church
We conducted a series of experiments to examine short-term (2-5 days) effects of abrupt increases in the partial pressure of carbon dioxide (pCO2) in seawater on rates of primary and bacterial production at Station ALOHA (22°45' N, 158° W) in the North Pacific Subtropical Gyre (NPSG). The majority of experiments (8 of 10 total) displayed no response in rates of primary production (measured by 14C-bicarbonate assimilation; 14C-PP) under elevated pCO2 (~1100 μatm) compared to ambient pCO2 (~387 μatm). In 2 of 10 experiments, rates of 14C-PP decreased significantly (~43%) under elevated pCO2 treatments relative to controls...
2018: PloS One
https://www.readbyqxmd.com/read/29691066/uncertainty-and-variability-in-laboratory-derived-sorption-parameters-of-sediments-from-a-uranium-in-situ-recovery-site
#20
Martin A Dangelmayr, Paul W Reimus, Raymond H Johnson, James T Clay, James J Stone
This research assesses the ability of a GC SCM to simulate uranium transport under variable geochemical conditions typically encountered at uranium in-situ recovery (ISR) sites. Sediment was taken from a monitoring well at the SRH site at depths 192 and 193 m below ground and characterized by XRD, XRF, TOC, and BET. Duplicate column studies on the different sediment depths, were flushed with synthesized restoration waters at two different alkalinities (160 mg/l CaCO3 and 360 mg/l CaCO3 ) to study the effect of alkalinity on uranium mobility...
April 18, 2018: Journal of Contaminant Hydrology
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