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Venous Saturation

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https://www.readbyqxmd.com/read/28218209/clinical-study-of-acute-vasoreactivity-testing-in-patients-with-chronic-thromboembolic-pulmonary-hypertension
#1
Qi-Xia Xu, Yuan-Hua Yang, Jie Geng, Zhen-Guo Zhai, Juan-Ni Gong, Ji-Feng Li, Xiao Tang, Chen Wang
BACKGROUND: The clinical significance of acute vasoreactivity testing (AVT) in patients with chronic thromboembolic pulmonary hypertension (CTEPH) remains unclear. We analyzed changes in hemodynamics and oxygenation dynamics indices after AVT in patients with CTEPH using patients with pulmonary arterial hypertension (PAH) as controls. METHODS: We analyzed retrospectively the results of AVT in 80 patients with PAH and 175 patients with CTEPH registered in the research database of Beijing Chao-Yang Hospital between October 2005 and August 2014...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28216699/comparison-of-volume-controlled-ventilation-and-pressure-controlled-ventilation-in-patients-undergoing-robot-assisted-pelvic-surgeries-an-open-label-trial
#2
Rishabh Jaju, Pooja Bihani Jaju, Mamta Dubey, Sadik Mohammad, A K Bhargava
BACKGROUND AND AIMS: Although volume controlled ventilation (VCV) has been the traditional mode of ventilation in robotic surgery, recently pressure controlled ventilation (PCV) has been used more frequently. However, evidence on whether PCV is superior to VCV is still lacking. We intended to compare the effects of VCV and PCV on respiratory mechanics and haemodynamic in patients undergoing robotic surgeries in steep Trendelenburg position. METHODS: This prospective, randomized trial was conducted on sixty patients between 20 and 70 years belonging to the American Society of Anesthesiologist Physical Status I-II...
January 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28214493/the-value-of-near-infrared-spectroscopy-for-the-assessment-of-calf-muscle-function-in-venous-patients
#3
Spyros N Vasdekis, Ioannis Tzemailas, Constantine N Antonopoulos, Sotiria Mastoraki, George K Mantas, Andreas Lazaris
OBJECTIVE: Near-infrared spectroscopy (NIRS) is a noninvasive technique with the potential to determine the degree of tissue oxygenation. The aim of the current study was to investigate the use of NIRS as a reliable method of detecting calf muscle pump dysfunction in groups of patients with venous disease. METHODS: Patients with superficial venous insufficiency (SVI) or history of deep venous thrombosis (DVT) were classified according to the comprehensive classification system for chronic venous disorders (clinical class, etiology, anatomy, and pathophysiology) and compared with controls (GROUP variable)...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28208845/role-of-altered-venous-blood-lactate-and-hba1c-in-women-with-gestational-diabetes-mellitus
#4
C S Nagalakshmi, N U Santhosh, N Krishnamurthy, Chethana Chethan, M K Shilpashree
INTRODUCTION: Being a mirror image of metabolic syndrome, Gestational Diabetes Mellitus (GDM) is associated with significant maternal and fetal morbidity. Increased blood lactate concentration and alterations of substrate utilization are partly involved in development of insulin resistance in GDM. Fetuses born to such mothers have shown low umbilical vein oxygen saturation and low oxygen content and increased lactate concentrations. These changes may certainly reflect enhanced fetal metabolism as a result of hyperglycaemia and hyperinsulinemia and therefore, these fetuses deserve intense surveillance at term and during delivery...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28202033/use-of-stepwise-lactate-kinetics-oriented-hemodynamic-therapy-could-improve-the-clinical-outcomes-of-patients-with-sepsis-associated-hyperlactatemia
#5
Xiang Zhou, Dawei Liu, Longxiang Su, Bo Yao, Yun Long, Xiaoting Wang, Wenzhao Chai, Na Cui, Hao Wang, Xi Rui
BACKGROUND: Setting lactate kinetics at >30% might improve the clinical outcomes of patients with sepsis-associated hyperlactatemia. The aim of this study was to explore the outcome benefits of stepwise lactate kinetics vs central venous oxygen saturation (ScvO2)-oriented hemodynamic therapy at 6 h as the protocol goal during early resuscitation. METHODS: The relevant parameters and adverse events after different targets in 360 randomly assigned patients with sepsis-associated hyperlactatemia were recorded and compared...
February 16, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28199348/presentation-management-and-outcomes-of-sepsis-in-adults-and-children-admitted-to-a-rural-ugandan-hospital-a-prospective-observational-cohort-study
#6
Kristina E Rudd, Leonard K Tutaryebwa, T Eoin West
OBJECTIVES: Limited data are available on sepsis in low-resource settings, particularly outside of urban referral centers. We conducted a prospective observational single-center cohort study in May 2013 to assess the presentation, management and outcomes of adult and pediatric patients admitted with sepsis to a community hospital in rural Uganda. METHODS: We consecutively screened all patients admitted to medical wards who met sepsis criteria. We evaluated eligible patients within 24 hours of presentation and 24-48 hours after admission, and followed them until hospital discharge...
2017: PloS One
https://www.readbyqxmd.com/read/28190787/comparison-of-hemodynamic-parameters-in-treatment-na%C3%A3-ve-and-pre-treated-patients-with-pulmonary-arterial-hypertension-in-the-randomized-phase-iii-patent-1-study
#7
Nazzareno Galiè, Friedrich Grimminger, Ekkehard Grünig, Marius M Hoeper, Marc Humbert, Zhi-Cheng Jing, Anne M Keogh, David Langleben, Lewis J Rubin, Arno Fritsch, Neil Davie, Hossein-Ardeschir Ghofrani
BACKGROUND: Detailed hemodynamic data from the phase III PATENT-1 study of riociguat in patients with pulmonary arterial hypertension (PAH) were investigated. METHODS: Patients with PAH who were treatment naïve or pre-treated with endothelin receptor antagonists or non-intravenous prostanoids were randomly assigned to riociguat up to 2.5 mg 3 times a day or placebo. Hemodynamic parameters were assessed at baseline and week 12. RESULTS: Riociguat significantly decreased pulmonary vascular resistance in treatment-naïve (n = 221; least squares [LS] mean difference -266 dyne∙sec∙cm(-5) [95% confidence interval (CI) -357 to -175; p < 0...
December 24, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28187154/comparison-of-different-inspiratory-triggering-settings-in-automated-ventilators-during-cardiopulmonary-resuscitation-in-a-porcine-model
#8
Dingyu Tan, Jun Xu, Shihuan Shao, Yangyang Fu, Feng Sun, Yazhi Zhang, Yingying Hu, Joseph Walline, Huadong Zhu, Xuezhong Yu
BACKGROUND: Mechanical ventilation via automated in-hospital ventilators is quite common during cardiopulmonary resuscitation. It is not known whether different inspiratory triggering sensitivity settings of ordinary ventilators have different effects on actual ventilation, gas exchange and hemodynamics during resuscitation. METHODS: 18 pigs enrolled in this study were anaesthetized and intubated. Continuous chest compressions and mechanical ventilation (volume-controlled mode, 100% O2, respiratory rate 10/min, and tidal volumes 10ml/kg) were performed after 3 minutes of ventricular fibrillation...
2017: PloS One
https://www.readbyqxmd.com/read/28167807/flipper-stroke-rate-and-venous-oxygen-levels-in-free-ranging-california-sea-lions
#9
Michael S Tift, Luis A Hückstädt, Birgitte I McDonald, Philip H Thorson, Paul J Ponganis
The depletion rate of the blood oxygen store, development of hypoxemia, and dive capacity are dependent on the distribution and rate of blood oxygen delivery to tissues while diving. Although blood oxygen extraction by working muscle would increase the blood oxygen depletion rate in a swimming animal, there is little information on the relationship between muscle workload and blood oxygen depletion during dives. Therefore, we examined flipper stroke rate, a proxy of muscle workload, and posterior vena cava oxygen profiles in four adult female California sea lions (Zalophus californianus) during foraging trips at sea...
February 6, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28151454/effects-of-blood-transfusion-on-oxygen-extraction-ratio-and-central-venous-saturation-in-children-after-cardiac-surgery
#10
Bana Nasser, Mohmad Tageldein, Abdulrahman AlMesned, Mohammad Kabbani
BACKGROUND: Red blood cell transfusion is common in critically ill children after cardiac surgery. Since the threshold for hemoglobin (Hb) transfusion need is not well defined, the threshold Hb level at which dependent critical oxygen uptake-to-delivery (VO2-DO2) status compensation is uncertain. OBJECTIVES: To assess the effects of blood transfusion on the oxygen extraction ratio (O2ER) and central venous oxygen saturation (ScvO2) to identify a critical O2ER value that could help us determine the critical need for blood transfusion...
January 2017: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/28148818/life-on-the-edge-o2-binding-in-atlantic-cod-red-blood-cells-near-their-southern-distribution-limit-is-not-sensitive-to-temperature-or-haemoglobin-genotype
#11
Samantha L Barlow, Julian Metcalfe, David A Righton, Michael Berenbrink
Atlantic cod are a commercially important species believed to be threatened by warming seas near their southern, equatorward upper thermal edge of distribution. Limitations to circulatory O2 transport, in particular cardiac output, and the geographic distribution of functionally different haemoglobin (Hb) genotypes have separately been suggested to play a role in setting thermal tolerance in this species. The present study assessed the thermal sensitivity of O2 binding in Atlantic cod red blood cells with different Hb genotypes near their upper thermal distribution limit and modelled its consequences for the arterio-venous O2 saturation difference, Sa-vO2 , another major determinant of circulatory O2 supply rate...
February 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28144779/focused-cardiac-ultrasound-in-the-early-resuscitation-of-severe-sepsis-and-septic-shock-a-prospective-pilot-study
#12
Hiroshi Sekiguchi, Yohei Harada, Hector R Villarraga, Sunil V Mankad, Ognjen Gajic
PURPOSE: Point-of-care ultrasonography has been increasingly used in the care of critically ill patients; however, reports on its use during active resuscitation are limited. The aim of this study was to investigate the true impact of focused cardiac ultrasound (FCU) during the management of sepsis with early (6-h) resuscitation. METHODS: A prospective pilot observational study was conducted at an academic medical center from March 2011 through July 2012. Patients undergoing resuscitation for severe sepsis or septic shock were prospectively enrolled at medical and combined medical-surgical intensive care units...
January 31, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28144579/microvascular-response-to-transfusion-in-elective-spine-surgery
#13
J Matthias Walz, Ottokar Stundner, Federico P Girardi, Bruce A Barton, Aimee R Koll-Desrosiers, Stephen O Heard, Stavros G Memtsoudis
AIM: To investigate the microvascular (skeletal muscle tissue oxygenation; SmO2) response to transfusion in patients undergoing elective complex spine surgery. METHODS: After IRB approval and written informed consent, 20 patients aged 18 to 85 years of age undergoing > 3 level anterior and posterior spine fusion surgery were enrolled in the study. Patients were followed throughout the operative procedure, and for 12 h postoperatively. In addition to standard American Society of Anesthesiologists monitors, invasive measurements including central venous pressure, continual analysis of stroke volume (SV), cardiac output (CO), cardiac index (CI), and stroke volume variability (SVV) was performed...
January 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28141842/dopamine-therapy-does-not-affect-cerebral-autoregulation-during-hypotension-in-newborn-piglets
#14
Vibeke Ramsgaard Eriksen, Martin Bo Rasmussen, Gitte Holst Hahn, Gorm Greisen
BACKGROUND: Hypotensive neonates who have been treated with dopamine have poorer neurodevelopmental outcome than those who have not been treated with dopamine. We speculate that dopamine stimulates adrenoceptors on cerebral arteries causing cerebral vasoconstriction. This vasoconstriction might lead to a rightward shift of the cerebral autoregulatory curve; consequently, infants treated with dopamine would have a higher risk of low cerebral blood flow at a blood pressure that is otherwise considered "safe"...
2017: PloS One
https://www.readbyqxmd.com/read/28140639/measured-and-calculated-variables-of-global-oxygenation-in-healthy-neonatal-foals
#15
David M Wong, Kate L Hepworth-Warren, Beatrice T Sponseller, Joan M Howard, Chong Wang
OBJECTIVE To assess multiple central venous and arterial blood variables that alone or in conjunction with one another reflect global oxygenation status in healthy neonatal foals. ANIMALS 11 healthy neonatal foals. PROCEDURES Central venous and arterial blood samples were collected from healthy neonatal foals at 12, 24, 36, 48, 72, and 96 hours after birth. Variables measured from central venous and arterial blood samples included oxygen saturation of hemoglobin, partial pressure of oxygen, lactate concentration, partial pressure of carbon dioxide, and pH...
February 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28124965/-bacteremia-caused-by-ciprofloxacin-resistant-salmonella-serotype-kentucky-a-case-report-and-the-review-of-literature
#16
Tuba Müderris, Fatma Yekta Ürkmez, Şeref Alp Küçüker, Muhammet Fethi Sağlam, Gül Ruhsar Yılmaz, Rahmet Güner, Revasiye Güleşen, Ziya Cibali Açıkgöz
Salmonella infections can be seen in four clinical types, namely gastroenteritis, bacteremia/sepsis, enteric fever and carriage. These infections can result in uncomplicated diarrhea in most cases, but can lead to invasive disease requiring antimicrobial therapy and can be life-threatening in elderly or immunocomprimised patients. Broad-spectrum cephalosporins and fluoroquinolones are crucial options in the treatment of the invasive infections. Ciprofloxacin resistance is rarely seen in non-typhoid Salmonella enterica isolates, and only in S...
October 2016: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28121832/central-venous-to-arterial-co2-difference-after-cardiac-surgery-in-infants-and-neonates
#17
Leslie A Rhodes, W Clinton Erwin, Santiago Borasino, David C Cleveland, Jeffrey A Alten
OBJECTIVES: Venous to arterial CO2 difference correlates with cardiac output in critically ill adults, but its utility in pediatric patients is unclear. We sought to correlate venous to arterial CO2 difference with other cardiac output surrogates (arteriovenous oxygen saturation difference, central venous oxygen saturation, and lactate) and investigate its capacity to predict poor outcomes associated with low cardiac output (low cardiac output syndrome) in infants after cardiac surgery with cardiopulmonary bypass...
January 24, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28120005/monitoring-dynamic-arterial-elastance-as-a-means-of-decreasing-the-duration-of-norepinephrine-treatment-in-vasoplegic-syndrome-following-cardiac-surgery-a-prospective-randomized-trial
#18
Pierre-Grégoire Guinot, Osama Abou-Arab, Mathieu Guilbart, Stéphane Bar, Elie Zogheib, Mona Daher, Patricia Besserve, Joseph Nader, Thierry Caus, Said Kamel, Hervé Dupont, Emmanuel Lorne
PURPOSE: To evaluate the ability of an algorithm based on dynamic arterial elastance to decrease the duration of norepinephrine treatment. METHODS: We performed a prospective, open-label, randomized study in patients requiring norepinephrine for vasoplegic syndrome after cardiac surgery with cardiopulmonary bypass. Patients were randomized to an algorithm-based intervention group or a control group. The primary outcome was the duration of norepinephrine treatment...
January 24, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28088520/palmitic-acid-increases-invasiveness-of-pancreatic-cancer-cells-aspc-1-through-tlr4-ros-nf-%C3%AE%C2%BAb-mmp-9-signaling-pathway
#19
Makena J Binker-Cosen, Daniel Richards, Brenda Oliver, Herbert Y Gaisano, Marcelo G Binker, Laura I Cosen-Binker
Pancreatic cancer (PC) is an aggressive malady with proclivity for early metastasis. Overexpression of toll-like receptor 4 (TLR4) in pancreatic ductal adenocarcinoma, the most common type of pancreatic malignancy, correlates to tumor size, lymph node involvement, venous invasion and pathological stage. Lipopolysaccharides (LPS) are natural TLR4 ligands that have been shown to increase the invasive ability of PC cells. However, rapid inactivation of circulating LPS and low systemic absorption of inhaled LPS from the bronchoalveolar compartment make other agonists such as saturated fatty acids more suitable to be considered for TLR4-related cell invasiveness...
January 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28087818/three-hours-of-intermittent-hypoxia-increases-circulating-glucose-levels-in-healthy-adults
#20
Lauren P Newhouse, Michael J Joyner, Timothy B Curry, Marcello C Laurenti, Chiara Dalla Man, Claudio Cobelli, Adrian Vella, Jacqueline K Limberg
An independent association exists between sleep apnea and diabetes. Animal models suggest exposure to intermittent hypoxia, a consequence of sleep apnea, results in altered glucose metabolism and fasting hyperglycemia. However, it is unknown if acute exposure to intermittent hypoxia increases glucose concentrations in nondiabetic humans. We hypothesized plasma glucose would be increased from baseline following 3 h of intermittent hypoxia in healthy humans independent of any effect on insulin sensitivity. Eight (7M/1F, 21-34 years) healthy subjects completed two study visits randomized to 3 h of intermittent hypoxia or continuous normoxia, followed by an oral glucose tolerance test...
January 2017: Physiological Reports
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