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https://www.readbyqxmd.com/read/28441439/hemodynamics-and-gas-exchange-during-chest-compressions-in-neonatal-resuscitation
#1
Payam Vali, Praveen Chandrasekharan, Munmun Rawat, Sylvia Gugino, Carmon Koenigsknecht, Justin Helman, Bobby Mathew, Sara Berkelhamer, Jayasree Nair, Myra Wyckoff, Satyan Lakshminrusimha
PURPOSE: Current knowledge about pulmonary/systemic hemodynamics and gas exchange during neonatal resuscitation in a model of transitioning fetal circulation with fetal shunts and fluid-filled alveoli is limited. Using a fetal lamb asphyxia model, we sought to determine whether hemodynamic or gas-exchange parameters predicted successful return of spontaneous circulation (ROSC). METHODS: The umbilical cord was occluded in 22 lambs to induce asphyxial cardiac arrest...
2017: PloS One
https://www.readbyqxmd.com/read/28432665/systemic-and-microcirculatory-effects-of-blood-transfusion-in-experimental-hemorrhagic-shock
#2
Gonzalo Ferrara, Vanina S Kanoore Edul, Héctor S Canales, Enrique Martins, Carlos Canullán, Gastón Murias, Mario O Pozo, Juan F Caminos Eguillor, María G Buscetti, Can Ince, Arnaldo Dubin
BACKGROUND: The microvascular reperfusion injury after retransfusion has not been completely characterized. Specifically, the question of heterogeneity among different microvascular beds needs to be addressed. In addition, the identification of anaerobic metabolism is elusive. The venoarterial PCO2 to arteriovenous oxygen content difference ratio (Pv-aCO2/Ca-vO2) might be a surrogate for respiratory quotient, but this has not been validated. Therefore, our goal was to characterize sublingual and intestinal (mucosal and serosal) microvascular injury after blood resuscitation in hemorrhagic shock and its relation with O2 and CO2 metabolism...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28417065/progressive-dyspnea-due-to-pulmonary-carcinoid-tumorlets
#3
Anastasios Kallianos, Lemonia Velentza, Paul Zarogoulidis, Sofia Baka, Christoforos Kosmidis, Sofia Labaki, George Lazaridis, Haidong Huang, Wolfgang Hohenforst-Schmidt, Georgia Trakada
This is a case description of a female patient, 77 years-old, who presented with progressive dyspnea and cough. She had a mild hypoxemia in the arterial blood gases (PaO2 72 mmHg) and normal spirometry. The chest computer tomography revealed diffuse "ground glass" opacities, segmental alveolitis, bronchiectasis, fibrotic lesions and numerous micronodules. A thoracoscopy was performed and the obtained biopsy showed carcinoid tumorlets, with positive CK8/18, CD56, TTF-1 and synaptophysin immunohistochemical markers...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28416148/alterations-in-autonomic-cerebrovascular-control-after-spinal-cord-injury
#4
Dong-Il Kim, Can Ozan Tan
Among chronic cardiovascular and metabolic sequelae of spinal cord injury (SCI) is an up-to four-fold increase in the risk of ischemic and hemorrhagic stroke, suggesting that individuals with SCI cannot maintain stable cerebral perfusion. In able-bodied individuals, the cerebral vasculature is able to regulate cerebral perfusion in response to swings in arterial pressure (cerebral autoregulation), blood gases (cerebral vasoreactivity), and neural metabolic demand (neurovascular coupling). This ability depends, at least partly, on intact autonomic function, but high thoracic and cervical spinal cord injuries result in disruption of sympathetic and parasympathetic cerebrovascular control...
April 4, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28403407/apnoeic-oxygenation-in-adults-under-general-anaesthesia-using-transnasal-humidified-rapid-insufflation-ventilatory-exchange-thrive-a-physiological-study
#5
I-M Gustafsson, Å Lodenius, J Tunelli, J Ullman, M Jonsson Fagerlund
Background.: Apnoeic oxygenation during anaesthesia has traditionally been limited by the rapid increase in carbon dioxide and subsequent decrease in pH. Using a Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRIVE) technique a slower increase in carbon dioxide than earlier studies was seen. Notably, apnoeic oxygenation using THRIVE has not been systematically evaluated with arterial blood gases or in patients undergoing laryngeal surgery. The primary aim of this study was to characterize changes in arterial P O 2 , P CO 2 and pH during apnoeic oxygenation using THRIVE under general anaesthesia...
April 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28392039/effect-of-arterial-puncture-on-ventilation
#6
Ashima Synghal Sahni, Hemil Gonzalez, Aiman Tulaimat
BACKGROUND: Clinicians frequently assume that during arterial puncture for measuring arterial blood gases patients hyperventilate from pain and anxiety. This assumption leads clinicians to falsely interpret a PaCO2 and pH near the upper limit of normal as a chronic respiratory acidosis corrected by an acute respiratory alkalosis. OBJECTIVE: Determine if participants hyperventilate during arterial puncture from pain and anxiety. METHODS: We recruited participants from a pulmonary function laboratory referred for arterial blood gas measurement...
April 6, 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/28384908/cardiac-effect-of-interstitial-lung-disease-correlated-with-spirometry-and-six-minute-walk-test
#7
Mitali Bharat Agrawal, Nilkanth Tukaram Awad
INTRODUCTION: The cardiac effect of different pulmonary functions, six minute walk distance, arterial blood gases and saturation in Interstitial Lung Disease (ILD) is not much known. So this study, a tertiary care hospital experience that entails to know the various factors in Pulmonary Hypertension (PH) mentioned above causing PH and their correlation with PH. AIM: To study the correlation of PH in patients with ILD with spirometry and six minute walk test (6MWT)...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28381665/establishment-of-reference-values-for-complete-blood-count-and-blood-gases-in-cynomolgus-monkeys-macaca-fascicularis
#8
Shunya Nakayama, Hiroshi Koie, Kiichi Kanayama, Yuko Katakai, Yasuyo Ito-Fujishiro, Tadashi Sankai, Yasuhiro Yasutomi, Naohide Ageyama
Cynomolgus monkeys are closely related to humans phylogenetically, and this has resulted in their widespread use as a preclinical model. Hematological data with regard to these monkeys are thus important. Although reference values for blood components and sex hormones have been established for cynomolgus monkeys, those for arterial blood gases have not. The arterial blood gases quickly reflect respiratory and circulatory dynamics, and are thus useful for animal management and safe general anesthesia and surgical operations...
April 1, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28381122/argon-exposure-induces-postconditioning-in-myocardial-ischemia-reperfusion
#9
Sandrine Lemoine, Katrien Blanchart, Mathieu Souplis, Adrien Lemaitre, Damien Legallois, Laurent Coulbault, Christophe Simard, Stéphane Allouche, Jacques H Abraini, Jean-Luc Hanouz, René Rouet, Laurent Sallé, Romain Guinamard, Alain Manrique
BACKGROUND AND PURPOSE: Cardioprotection against ischemia-reperfusion (I/R) damages remains a major concern during prehospital management of acute myocardial infarction. Noble gases have shown beneficial effects in preconditioning studies. Because emergency proceedings in the context of myocardial infarction require postconditioning strategies, we evaluated the effects of argon in such protocols on mammalian cardiac tissue. EXPERIMENTAL APPROACHES: In rat, cardiac I/R was induced in vivo by transient coronary artery ligature and cardiac functions were evaluated by magnetic resonance imaging...
January 1, 2017: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28371672/determinants-of-pulmonary-dead-space-in-ventilated-newborn-infants
#10
Theodore Dassios, Ourania Kaltsogianni, Anne Greenough
BACKGROUND: Pulmonary dead space (VD) is an index of ventilation inhomogeneity and one of the determinants of the magnitude of tidal volume to maintain optimal blood gases. AIMS: To identify the determinants of VD in ventilated newborns and to investigate differences in VD between prematurely born and term infants and those prematurely born infants who did or did not develop bronchopulmonary dysplasia (BPD). METHODS: Sixty-one mechanically ventilated infants (15 term, 46 preterm) were studied at a median age of 8 (IQR 2-31) days; 32 of the preterm infants developed BPD...
March 31, 2017: Early Human Development
https://www.readbyqxmd.com/read/28363076/continuous-intravenous-infusion-anesthesia-with-medetomidine-ketamine-and-midazolam-after-induction-with-a-combination-of-etorphine-medetomidine-and-midazolam-or-with-medetomidine-ketamine-and-butorphanol-in-impala-aepyceros-melampus
#11
Christina A Gerlach, Maya S Kummrow, Leith C Meyer, Gareth E Zeiler, George F Stegmann, Roxanne K Buck, Geoffrey T Fosgate, Sabine B Kästner
In order to develop a long-term anesthesia for flighty antelope species in field situations, two different protocols for induction and maintenance with an intravenous infusion were evaluated in wild-caught impala ( Aepyceros melampus ). Ten adult female impala were induced with two induction protocols: one consisted of 0.2 mg/kg medetomidine, 4 mg/kg ketamine, and 0.15 mg/kg butorphanol (MKB) and one consisted of 0.375 mg/kg etorphine, 0.2 mg/kg medetomidine, and 0.2 mg/kg midazolam (EMM). In both treatments, anesthesia was maintained with a continuous intravenous infusion (CII) at an initial dose rate of 1...
March 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28349556/cerebral-oxygenation-as-measured-by-near-infrared-spectroscopy-in-neonatal-intensive-care-correlation-with-arterial-oxygenation
#12
Carol Lu Hunter, Ju Lee Oei, Kei Lui, Timothy Schindler
AIM: To assess correlation between cerebral oxygenation (rScO2 ), as measured by near-infrared spectroscopy (NIRS), and arterial oxygenation (PaO2 ), as measured by arterial blood gases, in preterm neonates. METHODS: Preterm neonates <37 weeks gestation with an indwelling arterial vascular catheter were recruited between April and August 2015 from the neonatal intensive care unit of the Royal Hospital for Women, Randwick NSW, Australia. The NIRS sensor was placed on the frontolateral aspect of the head prior to arterial gas sampling...
March 27, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28336538/effects-of-dobutamine-on-intestinal-microvascular-blood-flow-heterogeneity-and-oxygen-extraction-during-septic-shock
#13
Gustavo Adolfo Ospina-Tascón, Alberto Federico García Marín, Gabriel J Echeverri, William Fernando Bermúdez, Humberto José Madriñán Navia, Juan David Valencia, Edgardo Quiñones, Fernando Rodríguez, Angela Marulanda, César Augusto Arango Davila, Alejandro Bruhn, Glenn Hernández, Daniel De Backer
Derangements of microvascular blood flow distribution might contribute to disturbing oxygen extraction by peripheral tissues. We evaluated the dynamic relationships between the mesenteric oxygen extraction ratio (mes-ERO2) and the heterogeneity of microvascular blood flow at the gut and sublingual mucosa, during the development and resuscitation of septic shock in a swine model of fecal peritonitis. Jejunal-villi and sublingual microcirculation were evaluated using a portable intravital-microscopy technique...
March 23, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28330727/evaluation-of-bam-butorphanol-azaperone-medetomidine-in-captive-african-lion-panthera-leo-immobilization
#14
Aleksandr Semjonov, Vladimir Andrianov, Jacobus P Raath, Toomas Orro, Derik Venter, Liesel Laubscher, Silke Pfitzer
OBJECTIVE: The combination of butorphanol, azaperone and medetomidine (BAM) with subsequent antagonism by naltrexone-yohimbine or naltrexone-atipamezole was evaluated for reversible immobilization of captive African lions (Panthea leo). STUDY DESIGN: Prospective, clinical trial. ANIMALS: Twenty lions, 11 males and nine females, weighing 38-284 kg were immobilized in South Africa. METHODS: The BAM volume dose rate administered was 0...
February 8, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28329240/effect-of-breathing-oxygen-enriched-air-on-exercise-performance-in-patients-with-precapillary-pulmonary-hypertension-randomized-sham-controlled-cross-over-trial
#15
Silvia Ulrich, Elisabeth D Hasler, Stéphanie Saxer, Michael Furian, Séverine Müller-Mottet, Stephan Keusch, Konrad E Bloch
Aims: The purpose of the current trial was to test the hypothesis that breathing oxygen-enriched air increases exercise performance of patients with pulmonary arterial or chronic thrombo-embolic pulmonary hypertension (PAH/CTEPH) and to investigate involved mechanisms. Methods and results: Twenty-two patients with PAH/CTEPH, eight women, means ± SD 61 ± 14 years, resting mPAP 35 ± 9mmHg, PaO2 ambient air >7.3 kPa, underwent four bicycle ergospirometries to exhaustion on different days, while breathing oxygen-enriched (FiO2 0...
April 14, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28328824/early-use-of-noninvasive-techniques-for-clearing-respiratory-secretions-during-noninvasive-positive-pressure-ventilation-in-patients-with-acute-exacerbation-of-chronic-obstructive-pulmonary-disease-and-hypercapnic-encephalopathy-a-prospective-cohort-study
#16
Jinrong Wang, Zhaobo Cui, Shuhong Liu, Xiuling Gao, Pan Gao, Yi Shi, Shufen Guo, Peipei Li
Noninvasive positive-pressure ventilation (NPPV) might be superior to conventional mechanical ventilation (CMV) in patients with acute exacerbations of chronic obstructive pulmonary disease (AECOPDs). Inefficient clearance of respiratory secretions provokes NPPV failure in patients with hypercapnic encephalopathy (HE). This study compared CMV and NPPV combined with a noninvasive strategy for clearing secretions in HE and AECOPD patients.The present study is a prospective cohort study of AECOPD and HE patients enrolled between October 2013 and August 2015 in a critical care unit of a major university teaching hospital in China...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28323763/prospective-randomized-clinical-trial-investigating-the-effect-of-the-reamer-irrigator-aspirator-on-the-volume-of-embolic-load-and-respiratory-function-during-intramedullary-nailing-of-femoral-shaft-fractures
#17
Jeremy A Hall, Michael D McKee, Milena R Vicente, Zachary A Morison, Niloofar Dehghan, Christine E Schemitsch, Hans J Kreder, Brad Petrisor, Emil H Schemitsch
OBJECTIVES: We sought to determine whether the use of the Reamer-Irrigator-Aspirator (RIA) device resulted in a decreased amount of fat emboli compared with standard reaming (SR) when performing intramedullary (IM) nailing of femoral shaft fractures. DESIGN: Prospective randomized clinical trial. SETTING: Multi-centered trial, level I trauma centers. PATIENTS/PARTICIPANTS: All eligible patients who presented to participating institutions with an isolated femoral shaft fracture amenable to fixation with antegrade IM nailing...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28306210/benchmarking-transverse-spin-relaxation-based-oxygenation-measurements-in-the-brain-during-hypercapnia-and-hypoxia
#18
Wendy W Ni, Thomas Christen, Greg Zaharchuk
PURPOSE: To simultaneously assess reproducibility of three MRI transverse relaxation parameters ( R2', R2*, and R2 ) for brain tissue oxygenation mapping and to assess changes in these parameters with inhalation of gases that increase and decrease oxygenation, to identify the most sensitive parameter for imaging brain oxygenation. MATERIALS AND METHODS: Forty-eight healthy subjects (25 male, ages 35 ± 8 years) were scanned at 3.0 Tesla, each with one of four gases (mildly and strongly hypercapnic and hypoxic) administered in a challenge paradigm, using a gas delivery setup designed for patient use...
March 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28298780/effects-of-inhaled-nitrous-oxide-on-the-induction-dose-and-time-requirements-of-propofol-a-prospective-randomized-double-blind-study
#19
Kavita Jain, Surendra Kumar Sethi, Mamta Damor, Neena Jain
CONTEXT: Propofol is a commonly used induction agent during general anesthesia. As a sole agent, it does not provide any strong analgesic effect. The nitrous oxide (N2O) used along with propofol for induction of anesthesia augments the induction characteristics and reduces the dose of propofol. AIMS: To study the effects of inhaled N2O on the induction dose and time of propofol during general anesthesia and also its hemodynamic response and adverse effects. SETTINGS AND DESIGN: The present research is a prospective, randomized, double-blind comparative study...
January 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28298763/effect-of-switching-between-pressure-controlled-and-volume-controlled-ventilation-on-respiratory-mechanics-and-hemodynamics-in-obese-patients-during-abdominoplasty
#20
Medhat Mikhail Messeha
BACKGROUND: The ideal intraoperative ventilation strategy in obese patients remains obscure. This prospective, randomized study was designed to evaluate the effect of pressure-controlled ventilation (PCV) before or after volume-controlled ventilation (VCV) on lung mechanics and hemodynamics variables in obese patients subjected to abdominoplasty operation. PATIENTS AND METHODS: The study included forty patients with body mass index 30-45 kg/m(2) subjected to abdominoplasty...
January 2017: Anesthesia, Essays and Researches
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