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https://www.readbyqxmd.com/read/29244812/optimal-occlusion-uniformly-partitions-red-blood-cells-fluxes-within-a-microvascular-network
#1
Shyr-Shea Chang, Shenyinying Tu, Kyung In Baek, Andrew Pietersen, Yu-Hsiu Liu, Van M Savage, Sheng-Ping L Hwang, Tzung K Hsiai, Marcus Roper
In animals, gas exchange between blood and tissues occurs in narrow vessels, whose diameter is comparable to that of a red blood cell. Red blood cells must deform to squeeze through these narrow vessels, transiently blocking or occluding the vessels they pass through. Although the dynamics of vessel occlusion have been studied extensively, it remains an open question why microvessels need to be so narrow. We study occlusive dynamics within a model microvascular network: the embryonic zebrafish trunk. We show that pressure feedbacks created when red blood cells enter the finest vessels of the trunk act together to uniformly partition red blood cells through the microvasculature...
December 15, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/29242654/comparison-of-volume-control-and-pressure-control-ventilation-in-patients-undergoing-single-level-anterior-cervical-discectomy-and-fusion-surgery
#2
Srilata Moningi, Praveen Kumar Elmati, Prasad Rao, Geetha Kanithi, Dilip Kumar Kulkarni, Gopinath Ramachandran
Background and Aims: Pressure control and volume control ventilation are the most preferred modes of ventilator techniques available in the intraoperative period. The study compared the intraoperative ventilator and blood gas variables of volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV) in patients undergoing single level anterior cervical discectomy and fusion (ACDF). Methods: After obtaining Institutional Ethical Committee approval and informed consent, sixty patients scheduled for single level ACDF surgery performed in supine position under general anaesthesia were included...
October 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/29242141/molecular-and-epidemiological-evidence-of-patient-to-patient-hepatitis-c-virus-transmission-in-a-scottish-emergency-department
#3
I Johannessen, J Danial, D B Smith, J Richards, L Imrie, A Rankin, L J Willocks, C Evans, C Leen, P Gibson, P Simmonds, D Goldberg, A McCallum, K Roy
BACKGROUND: Transmission of hepatitis C virus (HCV) in the health care setting is rare. Routine infection prevention and control (IPC) measures mean this should be a preventable never event. This paper investigates the diagnosis of acute healthcare associated HCV infection. METHODS: Epidemiological and molecular investigation of a case of acute HCV infection associated with nosocomial exposure. RESULTS: Detailed investigation of the treatment history of a patient with acute HCV infection identified transmission from a co-attending patient in an Emergency Department as the likely source; this possibility was confirmed by virus sequence analysis...
December 11, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29241628/-care-of-the-newborn-with-perinatal-asphyxia-candidate-for-therapeutic-hypothermia-during-the-first-six-hours-of-life-in-spain
#4
Juan Arnaez, Alfredo Garcia-Alix, Sara Calvo, Simón Lubián-López
INTRODUCTION: The process of care and assistance from birth to the starting of therapeutic hypothermia (TH) is crucial in order to improve its effectiveness and prevent the worsening of hypoxic-ischaemic injury. METHODS: A national cross-sectional study carried out in 2015 by use of a questionnaire sent to all level iii units on the care of the newborn≥35 weeks gestation within the first hours of life after a perinatal asphyxia event. According to clinical practice guidelines, the quality of care was compared between the hospitals that carried out or did not carry out TH, and according to the level of care...
December 11, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/29238999/physiological-gas-exchange-mapping-of-hyperpolarized-129-xe-using-spiral-ideal-and-moxe-in-a-model-of-regional-radiation-induced-lung-injury
#5
Brandon Zanette, Elaine Stirrat, Salomeh Jelveh, Andrew Hope, Giles Santyr
PURPOSE: To map physiological gas exchange parameters using dissolved hyperpolarized (HP) 129 Xe in a rat model of regional radiation-induced lung injury (RILI) with spiral-IDEAL and the model of xenon exchange (MOXE). Results are compared to quantitative histology of pulmonary tissue and red blood cell (RBC) distribution. METHODS: Two cohorts (n=6 each) of age-matched rats were used. One was irradiated in the right-medial lung, producing regional injury. Gas exchange was mapped four weeks post-irradiation by imaging dissolved-phase HP 129 Xe using spiral-IDEAL at five gas exchange timepoints using a clinical 1...
December 14, 2017: Medical Physics
https://www.readbyqxmd.com/read/29225968/metabolic-differences-between-dogs-of-different-body-sizes
#6
Rondo P Middleton, Sebastien Lacroix, Marie-Pier Scott-Boyer, Nikola Dordevic, Adam D Kennedy, Amanda R Slusky, Jerome Carayol, Christina Petzinger-Germain, Alison Beloshapka, Jim Kaput
Introduction: The domesticated dog, Canis lupus familiaris, has been selectively bred to produce extreme diversity in phenotype and genotype. Dogs have an immense diversity in weight and height. Specific differences in metabolism have not been characterized in small dogs as compared to larger dogs. Objectives: This study aims to identify metabolic, clinical, and microbiota differences between small and larger dogs. Methods: Gas chromatography/mass spectrometry, liquid chromatography/tandem mass spectrometry, clinical chemistry analysis, dual-energy X-ray absorptiometry, and 16S pyrosequencing were used to characterize blood metabolic, clinical, and fecal microbiome systems, respectively...
2017: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/29223704/decellularized-heart-ecm-hydrogel-using-supercritical-carbon-dioxide-for-improved-angiogenesis
#7
Yoojin Seo, Youngmee Jung, Soo Hyun Kim
Initial angiogenesis within the first 3 days is critical for healing ischemic diseases such as myocardial infarction. Recently, decellularized extracellular matrix (dECM) has been reported to provide tissue-derived ECM components and can be used as a scaffold for cell delivery for angiogenesis in tissue engineering. Decellularization by various detergents such as sodium dodecyl sulfate (SDS) and triton X-100 can remove the cell nuclei in tissue organs. However, this leads to ECM structure denaturation, decreased presence of various ECM proteins and cytokines, and loss of mechanical properties...
December 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29222338/blood-sample-transportation-by-pneumatic-transportation-systems-a-systematic-literature-review
#8
REVIEW
Mads Nybo, Merete E Lund, Kjell Titlestad, Christian U Maegaard
BACKGROUND: Pneumatic transportation systems (PTSs) are increasingly used for transportation of blood samples to the core laboratory. Many studies have investigated the impact of these systems on different types of analyses, but to elucidate whether PTSs in general are safe for transportation of blood samples, existing literature on the subject was systematically assessed. METHODS: A systematic literature review was conducted following the preferred reporting items for systematic reviews and metaanalyses (PRISMA) Statement guidelines to gather studies investigating the impact of PTS on analyses in blood samples...
December 8, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/29217405/a-novel-perspective-to-calibrate-temporal-delays-in-cerebrovascular-reactivity-using-hypercapnic-and-hyperoxic-respiratory-challenges
#9
Allen A Champagne, Alex A Bhogal, Nicole S Coverdale, Clarisse I Mark, Douglas J Cook
Redistribution of blood flow across different brain regions, arising from the vasoactive nature of hypercapnia, can introduce errors when examining cerebrovascular reactivity (CVR) response delays. In this study, we propose a novel analysis method to characterize hemodynamic delays in the blood oxygen level dependent (BOLD) response to hypercapnia, and hyperoxia, as a way to provide insight into transient differences in vascular reactivity between cortical regions, and across tissue depths. A pseudo-continuous arterial spin labeling sequence was used to acquire BOLD and cerebral blood flow simultaneously in 19 healthy adults (12 F; 20 ± 2 years) during boxcar CO2 and O2 gas inhalation paradigms...
December 4, 2017: NeuroImage
https://www.readbyqxmd.com/read/29216944/-prognostic-value-of-oxygen-challenge-test-for-patients-with-cardiogenic-shock-receiving-extracorporeal-membrane-oxygenation
#10
Liang Dong, Xiuhong Zhang, Fengming Liang, Xuan Yu, Ting Yang, Lang Li
OBJECTIVE: To investigate the prognostic value of oxygen challenge test (OCT) for patients with cardiogenic shock receiving extracorporeal membrane oxygenation (ECMO). METHODS: A retrospective analysis was conducted. Seventy-eight patients diagnosed with cardiogenic shock receiving veno-arterial (V-A) ECMO admitted to Department of intensive care unit (ICU) of Wuxi People's Hospital Affiliated to Nanjing Medical University from June 2012 to May 2017 were enrolled...
December 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/29214783/effective-tidal-volume-for-normocapnia-in-very-low-birth-weight-infants-using-high-frequency-oscillatory-ventilation
#11
Seul Mi Lee, Ran Namgung, Ho Sun Eun, Soon Min Lee, Min Soo Park, Kook In Park
PURPOSE: Removal of CO₂ is much efficient during high-frequency oscillatory ventilation (HFOV) for preterm infants. However, an optimal carbon dioxide diffusion coefficient (DCO₂) and tidal volume (VT) have not yet been established due to much individual variance. This study aimed to analyze DCO₂ values, VT, and minute volume in very-low-birth-weight (VLBW) infants using HFOV and correlates with plasma CO₂ (pCO₂). MATERIALS AND METHODS: Daily respiratory mechanics and ventilator settings from twenty VLBW infants and their two hundred seventeen results of blood gas analysis were collected...
January 2018: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29203732/x-ray-angiography-perfusion-imaging-with-an-intra-arterial-injection-comparative-study-with-15o-gas-water-positron-emission-tomography
#12
Katsunori Asai, Hajime Nakamura, Tadashi Watabe, Takeo Nishida, Manabu Sakaguchi, Jun Hatazawa, Toshiki Yoshimine, Haruhiko Kishima
BACKGROUND: X-ray angiography perfusion (XAP) is a perfusion imaging technique based on conventional DSA. OBJECTIVE: In this study, we aimed to validate parameters derived from XAP by comparing them with 15O-gas/water positron emission tomography (PET), using data from patients with chronic ischemic cerebrovascular disease. METHODS: 18 consecutive patients were included. XAP was performed with intra-arterial infusion of contrast media, and a time-density curve was constructed for each cerebral hemisphere...
December 4, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29201158/biomonitoring-method-for-the-analysis-of-chromium-and-cobalt-in-human-whole-blood-using-inductively-coupled-plasma-kinetic-energy-discrimination-mass-spectrometry-icp-ked-ms
#13
Joaudimir Castro Georgi, Yuliya L Sommer, Cynthia D Ward, Po-Yung Cheng, Robert L Jones, Kathleen L Caldwell
The Centers for Disease Control and Prevention developed a biomonitoring method to rapidly and accurately quantify chromium and cobalt in human whole blood by ICP-MS. Many metal-on-metal hip implants which contain significant amounts of chromium and cobalt are susceptible to metal degradation. This method is used to gather population data about chromium and cobalt exposure of the U.S. population that does not include people that have metal-on-metal hip implants so that reference value can be established for a baseline level in blood...
2017: Analytical Methods: Advancing Methods and Applications
https://www.readbyqxmd.com/read/29199768/invasive-versus-non-invasive-ventilation-for-acute-respiratory-failure-in-neuromuscular-disease-and-chest-wall-disorders
#14
REVIEW
Fang Luo, Djillali Annane, David Orlikowski, Li He, Mi Yang, Muke Zhou, Guan J Liu
BACKGROUND: Acute respiratory failure is a common life-threatening complication of acute onset neuromuscular diseases, and may exacerbate chronic hypoventilation in patients with neuromuscular disease or chest wall disorders. Standard management includes oxygen supplementation, physiotherapy, cough assistance, and, whenever needed, antibiotics and intermittent positive pressure ventilation. Non-invasive mechanical ventilation (NIV) via nasal, buccal or full-face devices has become routine practice in many centres...
December 4, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29192545/cardiovascular-respiratory-and-sedative-effects-of-intramuscular-alfaxalone-butorphanol-and-dexmedetomidine-compared-with-ketamine-butorphanol-and-dexmedetomidine-in-healthy-cats
#15
Jeannette Cremer, Carolina H Riccó
Objectives The aim of the study was to evaluate the cardiorespiratory effects, quality of sedation and recovery of intramuscular alfaxalone-dexmedetomidine-butorphanol (ADB) and ketamine-dexmedetomidine-butorphanol (KDB), in cats. Methods Nine adult, healthy cats (6.63 ± 1.42 kg) were enrolled in a blinded, randomized, crossover experimental design. Cats were sedated twice intramuscularly, once with ADB (alfaxalone 1 mg/kg, dexmedetomidine 0.005 mg/kg, butorphanol 0.2 mg/kg), and once with KDB (ketamine 5 mg/kg, dexmedetomidine 0...
November 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/29190036/devices-for-preventing-percutaneous-exposure-injuries-caused-by-needles-in-healthcare-personnel
#16
REVIEW
Viraj K Reddy, Marie-Claude Lavoie, Jos H Verbeek, Manisha Pahwa
BACKGROUND: Percutaneous exposure injuries from devices used for blood collection or for injections expose healthcare workers to the risk of blood borne infections such as hepatitis B and C, and human immunodeficiency virus (HIV). Safety features such as shields or retractable needles can possibly contribute to the prevention of these injuries and it is important to evaluate their effectiveness. OBJECTIVES: To determine the benefits and harms of safety medical devices aiming to prevent percutaneous exposure injuries caused by needles in healthcare personnel versus no intervention or alternative interventions...
November 14, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29188876/association-of-cortical-%C3%AE-amyloid-with-erythrocyte-membrane-monounsaturated-and-saturated-fatty-acids-in-older-adults-at-risk-of-dementia
#17
C Hooper, P De Souto Barreto, P Payoux, A S Salabert, S Guyonnet, S Andrieu, S Sourdet, J Delrieu, B Vellas
OBJECTIVES: We examined the relationships between erythrocyte membrane monounsaturated fatty acids (MUFAs) and saturated fatty acids (SFAs) and cortical β-amyloid (Aβ) load in older adults reporting subjective memory complaints. DESIGN: This is a cross-sectional study using data from the Multidomain Alzheimer Preventive Trial (MAPT); a randomised controlled trial. SETTING: French community dwellers aged 70 or over reporting subjective memory complaints, but free from a diagnosis of clinical dementia...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/29184860/safety-of-umbilical-cord-milking-in-very-preterm-neonates-a-randomized-controlled-study
#18
Soo-Youn Song, Youjin Kim, Byung-Hun Kang, Heon-Jong Yoo, Mina Lee
Objective: To investigate the safety of umbilical cord milking on both the mother and neonate among very preterm deliveries of less than 33 weeks of gestation. Methods: Pregnant women who were expected to deliver at between 24 0/7 and 32 6/7 weeks of gestation were randomized to either the umbilical cord milking or immediate cord clamping group. Maternal and neonatal data associated with delivery, in addition to neonatal morbidity and mortality data, were collected and analyzed...
November 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/29183573/age-dependent-physiological-dynamics-in-acid-base-balance-electrolytes-and-blood-metabolites-in-growing-goats
#19
S Redlberger, S Fischer, H Köhler, R Diller, P Reinhold
There is a paucity of published data reporting acid-base equilibrium in goats, and no information is available on how the acid-base complexity changes when suckling goat kids become ruminants. The aims of this study were to evaluate young healthy goats for age-related changes in serum proteins, metabolites, and electrolytes; differences in results when the Henderson-Hasselbalch equation or strong ion approaches were used were also assessed. To assess biological variability and reproducibility, two consecutive long-term studies, each lasting from the 6th to 56th week of life (wl), were performed in 15 (Study 1) and 10 (Study 2) animals...
November 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29177054/increase-in-branched-chain-amino-acids-due-to-acidemia-in-neonatal-calves-with-diarrhoea
#20
Kenji Tsukano, Hiroki Inoue, Kazuyuki Suzuki
The aim of this study was to investigate the relationships between acid-base status and plasma branched-chain amino acids (BCAA) concentration in calves with diarrhoea for intravenous nutrition, especially with amino acid solution in calves with diarrhoea. Thirty-four Holstein calves aged 11.0±5.9 days old were enrolled in this study. In 10 of 34 calves exhibiting clinical signs of diarrhoea, severe dehydration and acidemia were observed (severe group: pH: 7.04±0.11, base excess (BE): -17.4±4.5) based on blood gas analysis...
2017: Veterinary Record Open
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