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https://www.readbyqxmd.com/read/28915214/non-hemodynamic-effects-of-catecholamines
#1
Clair Hartmann, Peter Radermacher, Martin Wepler, Benedikt Nußbaum
Circulatory shock is defined as an imbalance between tissue oxygen supply and demand, and mostly results from a loss of blood volume, cardiac pump failure, and/or reduction of vasomotor tone. The clinical hallmarks of circulatory shock are arterial hypotension and lactate acidosis. Since the degree and duration of hypotension are major determinants of outcome, vasopressor administration represents a cornerstone therapy to treat these patients. Current guidelines recommend the use of catecholamines as the drug of first choice...
October 2017: Shock
https://www.readbyqxmd.com/read/28914359/changes-in-acid-base-and-ion-balance-during-exercise-in-normoxia-and-normobaric-hypoxia
#2
Olaf Lühker, Marc Moritz Berger, Alexander Pohlmann, Lorenz Hotz, Tilmann Gruhlke, Marcel Hochreiter
PURPOSE: Both exercise and hypoxia cause complex changes in acid-base homeostasis. The aim of the present study was to investigate whether during intense physical exercise in normoxia and hypoxia, the modified physicochemical approach offers a better understanding of the changes in acid-base homeostasis than the traditional Henderson-Hasselbalch approach. METHODS: In this prospective, randomized, crossover trial, 19 healthy males completed an exercise test until voluntary fatigue on a bicycle ergometer on two different study days, once during normoxia and once during normobaric hypoxia (12% oxygen, equivalent to an altitude of 4500 m)...
September 15, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28912578/tumour-acidosis-from-the-passenger-to-the-driver-s-seat
#3
REVIEW
Cyril Corbet, Olivier Feron
The high metabolic demand of cancer cells leads to an accumulation of H(+) ions in the tumour microenvironment. The disorganized tumour vasculature prevents an efficient wash-out of H(+) ions released into the extracellular medium but also favours the development of tumour hypoxic regions associated with a shift towards glycolytic metabolism. Under hypoxia, the final balance of glycolysis, including breakdown of generated ATP, is the production of lactate and a stoichiometric amount of H(+) ions. Another major source of H(+) ions results from hydration of CO2 produced in the more oxidative tumour areas...
September 15, 2017: Nature Reviews. Cancer
https://www.readbyqxmd.com/read/28906389/risk-factor-analysis-for-nonocclusive-mesenteric-ischemia-following-cardiac-surgery-a-case-control-study
#4
Ju Yong Lim, Joon Bum Kim, Sung Ho Jung, Suk Jung Choo, Cheol Hyun Chung, Jae Won Lee
Although rare, postcardiac surgery nonocclusive mesenteric ischemia (NOMI) is a life-threatening condition. Identifying the risk factors for NOMI during immediate postoperative period may help early detection and intervention, which leads to improved clinical outcomes. The objective of this study was to identify the clinical features and risk factors of NOMI for prognosis identification after cardiac surgery, focusing on immediate postoperative parameters.Among 9445 patients who underwent cardiac surgery over a span of 9 years, 40 NOMI cases (0...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28899735/a-randomised-comparison-of-bolus-phenylephrine-and-ephedrine-for-the-management-of-spinal-hypotension-in-patients-with-severe-preeclampsia-and-fetal-compromise
#5
R A Dyer, A Emmanuel, S C Adams, C J Lombard, M J Arcache, A Vorster, C A Wong, N Higgins, A R Reed, M F James, Y Joolay, S Schulein, D van Dyk
BACKGROUND: Studies in healthy patients undergoing elective caesarean delivery show that, compared with phenylephrine, ephedrine used to treat spinal hypotension is associated with increased fetal acidosis. This has not been investigated prospectively in women with severe preeclampsia. METHODS: Patients with preeclampsia requiring caesarean delivery for a non-reassuring fetal heart tracing were randomised to receive either bolus ephedrine (7.5-15mg) or phenylephrine (50-100µg), to treat spinal hypotension...
August 11, 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28893334/metabolic-and-stress-responses-in-dairy-cows-fed-a-concentrate-rich-diet-and-submitted-to-intramammary-lipopolysaccharide-challenge
#6
S Aditya, E Humer, P Pourazad, R Khiaosa-Ard, Q Zebeli
Feeding dairy cows diets rich in grain often leads to subacute rumen acidosis (SARA), which might affect their responsiveness to immunogenic stimuli such as exogenous lipopolysaccharide (LPS), and can lead to metabolic alterations. The main objective of this study was to investigate if SARA affects the stress and metabolic health responses resulting from an intramammary LPS challenge. Before the intramammary LPS challenge, the SARA cows showed higher blood glucose and a tendency for higher lactate and aspartate aminotransferase as well as a trend toward lower β-hydroxybutyrate (BHBA) and γ-glutamyltransferase compared with control cows...
September 12, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28877132/parameters-for-ordering-blood-cultures-in-major-burn-injury-patients-improving-clinical-assessment
#7
James D Vargo, Jacob N Grow, Susan Yang, Abby Bernard, Niaman Nazir, Dhaval Bhavsar
Hypermetabolic and catabolic states in large TBSA burns lead to higher basal body temperature and tachycardia. These metabolic changes complicate the diagnosis of bacteremia and sepsis. Current indications for obtaining blood cultures (BCs) in this population are poorly described and nonstandardized. Fever, leukocytosis, and lactic acidosis are common during sepsis. This study aims to identify limits of these parameters with the highest rates of bacteremia. A retrospective review was performed for burn patients with > 20% TBSA between January 2009 and June 2011...
August 31, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28866978/peripheral-venoarterial-extracorporeal-membrane-oxygenation-for-severe-hyperlactataemia-after-cardiac-surgery-a-pilot-study
#8
Peter Biesenbach, Rashmi Ghanpur, Johan Mårtensson, Marco Crisman, Steven Lindstrom, Andrew Hilton, George Matalanis, Rinaldo Bellomo
BACKGROUND: Severe hyperlactataemia in patients after cardiac surgery is associated with poor prognosis and implies possible splanchnic hypoperfusion. Peripheral venoarterial extracorporeal membrane oxygenation (splanchnic ECMO) may be more effective at reducing lactic acidosis for these patients. OBJECTIVE: To investigate whether splanchnic ECMO attenuates hyperlactataemia and liver enzyme release in these patients, despite them having a cardiac index > 2 L/min/m(2) and a mixed venous oxygen saturation > 55%...
September 2017: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
https://www.readbyqxmd.com/read/28856906/effect-of-propionibacterium-acidipropionici-p169-on-the-rumen-and-faecal-microbiota-of-beef-cattle-fed-a-maize-based-finishing-diet
#9
E Azad, N Narvaez, H Derakhshani, A Y Allazeh, Y Wang, T A McAllister, E Khafipour
Direct fed microbial supplementation with lactic acid utilising bacteria (i.e. Propionibacterium acidipropionici P169) has been shown to alleviate the severity of subacute ruminal acidosis in high-grain fed beef cattle. This study was carried out to explore the impact of P169 supplementation on modulating rumen and hindgut microbiota of high-grain fed steers. Seven ruminally-canulated high-grain fed steers were randomly assigned to two treatment groups: control diet (n=3) and the same diet supplemented with P169 added at a rate of 1×10(11) cfu/head/d (n=4)...
August 31, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28854513/preoperative-metabolic-acidosis-in-infants-with-gastroschisis
#10
W El-Naggar, A Almudeer, M Vincer, N L Yanchar
INTRODUCTION: There is little in literature regarding preoperative management of infants with gastroschisis. It is unclear if these infants develop metabolic acidosis as a consequence of prolonged intrauterine gut compromise or dehydration secondary to increased fluid loss. AIM: To assess the frequency of preoperative metabolic acidosis in infants with gastroschisis and investigate whether this acidosis reflects degree of gut compromise. METHODS: All infants with gastroschisis born between May 2005 and April 2013 in a single tertiary care center were reviewed...
August 23, 2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28836132/lactate-levels-with-chronic-metformin-use-a-narrative-review
#11
REVIEW
Weiyi Huang, Ronald L Castelino, Gregory M Peterson
Metformin has been associated with lactic acidosis. Lactate levels are not commonly tested in clinical practice, and it is unclear to what extent metformin would typically increase lactate levels with chronic use. The aim of this review was to determine whether regular monitoring of the plasma lactate level would be beneficial in avoiding lactate accumulation and, ultimately, minimising the incidence of lactic acidosis in metformin-treated patients.A comprehensive search of PubMed, Embase, Web of Science, Cochrane and International Pharmaceutical Abstracts databases covering the period up to 30 May 2017 was performed...
August 23, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28832554/contribution-of-intrinsic-lactate-to-maintenance-of-seizure-activity-in-neocortical-slices-from-patients-with-temporal-lobe-epilepsy-and-in-rat-entorhinal-cortex
#12
Eskedar Ayele Angamo, Rizwan ul Haq, Jörg Rösner, Siegrun Gabriel, Zoltán Gerevich, Uwe Heinemann, Richard Kovács
Neuronal lactate uptake supports energy metabolism associated with synaptic signaling and recovery of extracellular ion gradients following neuronal activation. Altered expression of the monocarboxylate transporters (MCT) in temporal lobe epilepsy (TLE) hampers lactate removal into the bloodstream. The resulting increase in parenchymal lactate levels might exert both, anti- and pro-ictogen effects, by causing acidosis and by supplementing energy metabolism, respectively. Hence, we assessed the contribution of lactate to the maintenance of transmembrane potassium gradients, synaptic signaling and pathological network activity in chronic epileptic human tissue...
August 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28827507/presentation-coagulopathy-and-persistent-acidosis-predict-complications-in-orthopaedic-trauma-patients
#13
Benjamin R Childs, Daniel R Verhotz, Timothy A Moore, Heather A Vallier
OBJECTIVES: To evaluate the ability of measures of coagulopathy and acidosis to predict complications. We hypothesize that increased coagulopathy and acidosis over the first 60 hours of hospitalization will result in increased rates of infection and mortality. DESIGN: Prospective, observational. SETTING: Level 1 trauma center. PATIENTS: Three hundred and seventy-six skeletally mature patients with an Injury Severity Score (ISS) greater than 16 who were surgically treated for high energy fractures of the femur, pelvic ring, acetabulum, and/or spine...
August 15, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28827372/monocarboxylate-transporter-mct1-promotes-tumor-metastasis-independently-of-its-activity-as-a-lactate-transporter
#14
Valéry L Payen, Myriam Y Hsu, Kristin S Rädecke, Elisabeth Wyart, Thibaut Vazeille, Caroline Bouzin, Paolo E Porporato, Pierre Sonveaux
Extracellular acidosis resulting from intense metabolic activities in tumors promotes cancer cell migration, invasion and metastasis. While host cells die at low extracellular pH, cancer cells resist, as they are well equipped with transporters and enzymes to regulate intracellular pH homeostasis. A low extracellular pH further activates proteolytic enzymes that remodel the extracellular matrix to facilitate cell migration and invasion. Monocarboxylate transporter MCT1 is a passive transporter of lactic acid that has attracted interest as a target for small molecule drugs to prevent metastasis...
August 21, 2017: Cancer Research
https://www.readbyqxmd.com/read/28820737/when-one-disease-is-not-enough-succinyl-coa-3-oxoacid-coenzyme-a-transferase-scot-deficiency-due-to-a-novel-mutation-in-oxct1-in-an-infant-with-known-phenylketonuria
#15
Jan-Niclas Schwade, Matthias Endmann, Thomas Hofmann, Stephan Rust, Jörn Oliver Sass, Frank Rutsch
A 9-month-old Turkish girl was admitted several times within 3 months to the hospital in reduced general condition and with extreme tachypnea. The patient had been diagnosed with phenylketonuria (PKU) in newborn screening and has been treated with a low phenylalanine diet and amino acid supplements. Each time an unexplained pronounced metabolic acidosis was noted, and the child was treated with sodium-bicarbonate and glucose-electrolyte infusions. The acidosis with only slightly abnormal glucose, normal lactate levels and pronounced ketonuria suggested a defect in ketone body utilization...
August 18, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28816632/the-liver-circadian-clock-modulates-biochemical-and-physiological-responses-to-metformin
#16
Emma Henriksson, Anne-Laure Huber, Erin K Soto, Anna Kriebs, Megan E Vaughan, Drew Duglan, Alanna B Chan, Stephanie J Papp, Madelena Nguyen, Megan E Afetian, Katja A Lamia
Metformin is widely used in the treatment of type 2 diabetes to lower blood glucose. Although metformin is a relatively safe and effective drug, its clinical efficacy is variable and under certain circumstances it may contribute to life-threatening lactic acidosis. Thus, additional understanding of metformin pharmacokinetics and pharmacodynamics could provide important information regarding therapeutic use of this widely prescribed drug. Here we report a significant effect of time of day on acute blood glucose reduction in response to metformin administration and on blood lactate levels in healthy mice...
August 2017: Journal of Biological Rhythms
https://www.readbyqxmd.com/read/28797049/effect-of-sodium-bicarbonate-on-prolonged-running-performance-a-randomized-double-blind-cross-over-study
#17
Tanja Freis, Anne Hecksteden, Ulf Such, Tim Meyer
BACKGROUND: The ability to sustain intense exercise seems to be partially limited by the body's capability to counteract decreases in both intra- and extracellular pH. While the influence of an enhanced buffering capacity via sodium bicarbonate (BICA) on short-term, high-intensity exercise performance has been repeatedly investigated, studies on prolonged endurance performances are comparatively rare, especially for running. The aim of the following study was to assess the ergogenic effects of an oral BICA substitution upon exhaustive intensive endurance running performance...
2017: PloS One
https://www.readbyqxmd.com/read/28774273/thrombotic-microangiopathy-associated-with-valproic-acid-toxicity
#18
Sean A Hebert, Timothy P Bohan, Christian L Erikson, Rita D Swinford
BACKGROUND: Thrombotic microangiopathy (TMA) is a serious, sometimes life-threatening disorder marked by the presence of endothelial injury and microvascular thrombi. Drug-induced thrombotic microangiopathy (DI-TMA) is one specific TMA syndrome that occurs following drug exposure via drug-dependent antibodies or direct tissue toxicity. Common examples include calcineurin inhibitors Tacrolimus and Cyclosporine and antineoplastics Gemcitabine and Mitomycin. Valproic acid has not been implicated in DI-TMA...
August 3, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28765741/experience-with-mechanical-circulatory-support-for-medically-intractable-low-cardiac-output-in-a-pediatric-intensive-care-unit
#19
Jung Bin Park, Jae Gun Kwak, Hong-Gook Lim, Woong-Han Kim, Jeong Ryul Lee, Yong Jin Kim
BACKGROUND AND OBJECTIVES: Mechanical circulatory support with extracorporeal membrane oxygenation (ECMO) and ventricular assist device has always been the optimal choice for treating the majority of medically intractable low cardiac output case. We retrospectively investigated our institution's outcomes and variables associated with a high risk of mortality. SUBJECTS AND METHODS: From 1999 to 2014, 86 patients who were of pediatric age or had grown-up congenital heart disease underwent mechanical circulatory support for medically intractable low cardiac output in our pediatric intensive care unit...
July 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/28762448/comparison-of-warm-fluid-and-cold-fluid-resuscitation-during-uncontrolled-hemorrhagic-shock-model-in-rats
#20
Serkan Dilmen, Mehmet Eryılmaz, Salih Müjdat Balkan, Muhittin Serdar, Murat Durusu, Ali Osman Yıldırım, Sanem Aslıhan Dilmen
BACKGROUND: This study was designed to compare the effects of resuscitation with cold and warm fluid on survival time, rate and volume of hemorrhage, hemodynamics, hypothermia, coagulopathy, acid-base balance, hematocrit, lactate, and base deficit during uncontrolled hemorrhagic shock (HS) model in rats. METHODS: HS model was created with splenic vascular and parenchymal injury in 29 rats under ketamine and xylazine anesthesia. Thirty minutes after the hemorrhage, the rats were randomized to receive 14...
July 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
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