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Venous Saturation

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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
#1
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 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28087818/three-hours-of-intermittent-hypoxia-increases-circulating-glucose-levels-in-healthy-adults
#2
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
https://www.readbyqxmd.com/read/28087439/cerebrovascular-heterogeneity-and-neuronal-excitability
#3
REVIEW
Laura Librizzi, Marco de Curtis, Damir Janigro, Leonie Runtz, Frederic deBock, Emmanuel L Barbier, Nicola Marchi
The cerebral vasculature is a complex tridimensional network of arterial and venous vessels which are anatomically in proximity of and functionally coupled to neurons. Depending on the cellular composition of the vascular wall and its anatomical arrangement, cerebral vessels control regional blood flow, define interstitial homeostasis or cerebrospinal fluid circulation and influence immune cell patrolling. Pathological deviations from these functions promote or are a consequence of brain diseases, directly impacting neuronal firing...
January 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28074802/goal-directed-therapy-improves-the-outcome-of-high-risk-cardiac-patients-undergoing-off-pump-coronary-artery-bypass
#4
Poonam Malhotra Kapoor, Rohan Magoon, Rajinder Singh Rawat, Yatin Mehta, Sameer Taneja, R Ravi, Milind P Hote
BACKGROUND: There has been a constant emphasis on developing management strategies to improve the outcome of high-risk cardiac patients undergoing surgical revascularization. The performance of coronary artery bypass surgery on an off-pump coronary artery bypass (OPCAB) avoids the risks associated with extra-corporeal circulation. The preliminary results of goal-directed therapy (GDT) for hemodynamic management of high-risk cardiac surgical patients are encouraging. The present study was conducted to study the outcome benefits with the combined use of GDT with OPCAB as compared to the conventional hemodynamic management...
January 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28071964/hypercapnia-is-essential-to-reduce-the-cerebral-oxidative-metabolism-during-extreme-apnea-in-humans
#5
Anthony R Bain, Philip N Ainslie, Otto F Barak, Ryan L Hoiland, Ivan Drvis, Tanja Mijacika, Damian M Bailey, Antoinette Santoro, Daniel K DeMasi, Zeljko Dujic, David B MacLeod
The cerebral metabolic rate of oxygen (CMRO2) is reduced during apnea that yields profound hypoxia and hypercapnia. In this study, to dissociate the impact of hypoxia and hypercapnia on the reduction in CMRO2, 11 breath-hold competitors completed three apneas under: (a) normal conditions (NM), yielding severe hypercapnia and hypoxemia, (b) with prior hyperventilation (HV), yielding severe hypoxemia only, and (c) with prior 100% oxygen breathing (HX), yielding the greatest level of hypercapnia, but in the absence of hypoxemia...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28052954/clinical-features-and-short-term-outcomes-of-cancer-patients-with-suspected-and-unsuspected-pulmonary-embolism-the-epiphany-study
#6
Carme Font, Alberto Carmona-Bayonas, Carmen Beato, Òscar Reig, Antonia Sáez, Paula Jiménez-Fonseca, Juana M Plasencia, David Calvo-Temprano, Marcelo Sanchez, Mariana Benegas, Mercedes Biosca, Diego Varona, Maria Angeles Vicente, Laura Faez, Maria Del Pilar Solís, Irma de la Haba, Maite Antonio, Olga Madridano, Eduardo Castañon, María Jose Martinez, Pablo Marchena, Avinash Ramchandani, Angel Dominguez, Alejandro Puerta, David Martinez de la Haza, Jesus Pueyo, Susana Hernandez, Angela Fernandez-Plaza, Lourdes Martinez-Encarnacion, Mar Martin, Gema Marin, Francisco Ayala, Vicente Vicente, Remedios Otero
The study aimed to identify predictors of overall 30-day mortality in cancer patients with pulmonary embolism including suspected pulmonary embolism (SPE) and unsuspected pulmonary embolism (UPE) events. Secondary outcomes included 30- and 90-day major bleeding and venous thromboembolism (VTE) recurrence.The study cohort included 1033 consecutive patients with pulmonary embolism from the multicentre observational ambispective EPIPHANY study (March 2006-October 2014). A subgroup of 497 patients prospectively assessed for the study were subclassified into three work-up scenarios (SPE, truly asymptomatic UPE and UPE with symptoms) to assess outcomes...
January 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28042556/deep-vein-thrombosis-in-patients-with-pulmonary-embolism-prevalance-clinical-significance-and-outcome
#7
Jun Sung Lee, Tong Moon, Tae Hoon Kim, Se Young Kim, Jun Young Choi, Kyung Bok Lee, Yu Jin Kwon, Suk Hee Song, Su Hyun Kim, Hae Ok Kim, Ho Kyeong Hwang, Min Ji Kim, Young Kyoung Lee
PURPOSE: Deep venous thrombosis (DVT) and pulmonary embolism (PE) are considered as similar disease entities representing different clinical manifestations. The objectives of this study were: 1) to determine the prevalence and outcome of DVT in patients with PE; 2) to identify additional risk factors for PE-related unfavorable outcome and 30-day all-cause mortality; and 3) to establish the clinical importance of screening for concomitant DVT. MATERIALS AND METHODS: From January 2013 to December 2015, a total of 141 patients with confirmed PE were evaluated...
December 2016: Vascular Specialist International
https://www.readbyqxmd.com/read/28012642/postoperative-cerebral-and-somatic-near-infrared-spectroscopy-saturations-and-outcome-in-hypoplastic-left-heart-syndrome
#8
George M Hoffman, Nancy S Ghanayem, John P Scott, James S Tweddell, Michael E Mitchell, Kathleen A Mussato
BACKGROUND: Circulatory vulnerability reflected by low systemic venous oxygen saturation after surgical palliation of hypoplastic left heart syndrome predicts adverse neurologic outcome and reduced survival, and targeting venous saturation may improve outcome. We herein test the hypothesis that near-infrared spectroscopy (NIRS)-derived cerebral and somatic/renal regional saturations can predict survival. METHODS: Patient data, from a prospective Institutional Review Board-approved registry of hemodynamic measures after initial palliation of hypoplastic left heart syndrome, were analyzed with logistic and multivariable mixed regression methods to determine relationships between standard hemodynamic measures, direct and NIRS measures of saturation, and outcome...
December 21, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28001129/a-multispectral-microscope-for-in-vivo-oximetry-of-rat-dorsal-spinal-cord-vasculature
#9
Marieke A van der Putten, Lewis E MacKenzie, Andrew L Davies, Javier Fernandez-Ramos, Roshni A Desai, Kenneth J Smith, Andrew R Harvey
Quantification of blood oxygen saturation (SO2) in vivo is essential for understanding the pathogenesis of diseases in which hypoxia is thought to play a role, including inflammatory disorders such as multiple sclerosis (MS) and rheumatoid arthritis (RA). We describe a low-cost multispectral microscope and oximetry technique for calibration-free absolute oximetry of surgically exposed blood vessels in vivo. We imaged the vasculature of the dorsal spinal cord in healthy rats, and varied inspired oxygen (FiO2) in order to evaluate the sensitivity of the imaging system to changes in SO2...
December 21, 2016: Physiological Measurement
https://www.readbyqxmd.com/read/28000040/a-monitor-for-cellular-oxygen-metabolism-comet-monitoring-tissue-oxygenation-at-the-mitochondrial-level
#10
Rinse Ubbink, Mark A Wefers Bettink, Rineke Janse, Floor A Harms, Tanja Johannes, F Michael Münker, Egbert G Mik
After introduction of the protoporphyrin IX-triplet state lifetime technique as a new method to measure mitochondrial oxygen tension in vivo, the development of a clinical monitor was started. This monitor is the "COMET", an acronym for Cellular Oxygen METabolism. The COMET is a non-invasive electrically powered optical device that allows measurements on the skin. The COMET is easy to transport, due to its lightweight and compact size. After 5-aminolevulinic acid application on the human skin, a biocompatible sensor enables detection of PpIX in the mitochondria...
December 20, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27994261/use-of-cardiopulmonary-bypass-for-management-of-massive-air-embolism-during-hysteroscopic-metroplasty
#11
Ahmad Ali Amirghofran, Narjes Nick, Mina Amiri, Rahim Hemmati
The patient was a 32-year-old woman who presented with infertility secondary to uterine didelphys. Hysteroscopic metroplasty was chosen as the corrective surgical procedure for this anatomical defect. During the surgical repair, the patient developed a massive air embolism (MAE) leading to hypotension, arrhythmia, and cardiogenic shock. Resuscitation was started by placing the patient in the right-side up position, and emplacement of central venous catheter, but it was unsuccessful. The decision was then made to bypass the patient's cardiopulmonary system to effectively treat the MAE...
December 2016: Journal of Extra-corporeal Technology
https://www.readbyqxmd.com/read/27988069/a-simple-hemodynamic-parameter-to-predict-clinical-worsening-in-pulmonary-arterial-hypertension
#12
Ahmad Amin, Arezoo Mohamadifar, Mohammad Sadegh Keshmiri, Behshid Ghadrdoost, Sepideh Taghavi, Nasim Naderi
BACKGROUND: Predicting prognosis is a cornerstone in management of pulmonary arterial hypertension. Hemodynamic parameters are among the robust indicators of right ventricular function and prognosis. In this study we have investigated the association of a simple hemodynamic parameter with clinical worsening in pulmonary arterial hypertension. METHODS AND PATIENTS: 120 patients were enrolled in a single center prospective cohort study after confirmation of precapillary pulmonary hypertension and were followed for an average of 36months on guideline recommended treatment protocols...
December 10, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/27931643/microvascular-monitoring-do-global-markers-help
#13
REVIEW
Jean-Louis Vincent, Fabio Silvio Taccone
The microcirculation is altered in sepsis, and the degree and persistence of these alterations are associated with outcome. When there are significant alterations of the systemic circulation, as in shock, the microcirculation is always altered. However, sometimes global variables can be restored to normal while the microcirculation remains altered. Monitoring the microcirculation has, therefore, been proposed as a more precise means of assessing the effects of therapy. In this review, we will discuss the limitations of global haemodynamic variables such as mean arterial pressure, cardiac output and mixed venous oxygen saturation as markers of microcirculatory abnormalities...
December 2016: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/27928258/evaluation-of-pulse-oximetry-in-the-early-detection-of-cyanotic-congenital-heart-disease-in-newborns
#14
Amir Hosein Movahedian, Ziba Mosayebi, Setareh Sagheb
Background: Delayed or missed diagnosis of critical and cyanotic congenital heart disease (CHD) in asymptomatic newborns may result in significant morbidity and mortality. The aim of this study was to determine the accuracy of pulse oximetry screening performed on the first day of life for the early detection of critical and cyanotic CHD in apparently normal newborns. Methods: This cross-sectional study used postductal pulse oximetry to evaluate term neonates born between 2008 and 2011 with normal physical examinations...
April 13, 2016: Journal of Tehran Heart Center
https://www.readbyqxmd.com/read/27923389/the-importance-of-albumin-infusion-rate-for-plasma-volume-expansion-following-major-abdominal-surgery-air-study-protocol-for-a-randomised-controlled-trial
#15
Svajunas Statkevicius, Johan Bonnevier, Björn P Bark, Erik Larsson, Carl M Öberg, Päivi Kannisto, Bobby Tingstedt, Peter Bentzer
BACKGROUND: Administration of fluids to restore normovolaemia is one of the most common therapeutic interventions performed peri-operatively and in the critically ill, but no study has evaluated the importance of infusion rate for the plasma volume-expanding effect of a resuscitation fluid. The present study is designed to test the hypothesis that a slow infusion of resuscitation fluid results in better plasma volume expansion than a rapid infusion. METHODS/DESIGN: The study is a single-centre, assessor-blinded, parallel-group, randomised prospective study...
December 7, 2016: Trials
https://www.readbyqxmd.com/read/27915164/can-the-cerebral-regional-oxygen-saturation-be-a-perfusion-parameter-in-shock
#16
Ashraf Al Tayar, Amr Abouelela, Khaja Mohiuddeen
INTRODUCTION: Shock, defined as a state of tissue hypoperfusion and the tissues reperfusion, is the main goal of management of shock. Increase in central venous saturation (CvSo2) and decrease in blood lactate level are useful in assessment of adequacy of tissue perfusion. Near-infrared spectroscopy is a noninvasive way to observe real-time changes in regional cerebral saturation and has been used in patients with different brain diseases. There is a small body of literature suggesting that cerebral regional oxygen saturation (CrSo2) monitoring added a value in assessment and management of intensive care unit (ICU) patients...
November 10, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/27908340/end-points-of-sepsis-resuscitation
#17
REVIEW
John C Greenwood, Clinton J Orloski
Resuscitation goals for the patient with sepsis and septic shock are to return the patient to a physiologic state that promotes adequate end-organ perfusion along with matching metabolic supply and demand. Ideal resuscitation end points should assess the adequacy of tissue oxygen delivery and oxygen consumption, and be quantifiable and reproducible. Despite years of research, a single resuscitation end point to assess adequacy of resuscitation has yet to be found. Thus, the clinician must rely on multiple end points to assess the patient's overall response to therapy...
February 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/27908328/the-new-usual-care
#18
REVIEW
Jared Radbel, Daniel Boutsikaris
Recent literature continues to refine which components of the early goal-directed therapy (EGDT) algorithm are necessary. Given it utilizes central venous pressure, continuous central venous oxygen saturation, routine blood transfusions, and inotropic medications, this algorithm can be timely, invasive, costly, and potentially harmful. New trials highlight early recognition, early fluid resuscitation, appropriate antibiotic treatment, source control, and the application of a multidisciplinary evidence-based approach as essential components of current sepsis management...
February 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/27894918/laser-speckle-contrast-imaging-and-oxygen-to-see-for-assessing-microcirculatory-liver-blood-flow-changes-following-different-volumes-of-hepatectomy
#19
Chong Hui Li, Xin Lan Ge, Ke Pan, Peng Fei Wang, Yi Nan Su, Ai Qun Zhang
OBJECTIVE: Portal hyperperfusion after extended hepatectomy or small-for-size liver transplantation may induce organ dysfunction and failure. This study was designed to monitor and characterize the hepatic microcirculatory perfusion following different volumes of hepatectomy in rats by using laser speckle contrast image (LSCI) and Oxygen to See (O2C), a spectrometric device. METHODS: The microcirculatory liver blood flow of the rats that underwent 68%, 85% and 90% hepatectomy (68PH, 85PH and 90PH) was monitored with LSCI and O2C before and following the hepatectomy...
November 25, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27893583/retinal-vessel-oxygen-saturation-and-vessel-diameter-in-inactive-graves-ophthalmopathy
#20
Xiaonan Yang, Danping Huang, Siming Ai, Xuanwei Liang, Jing Zhao, Lei Fang
PURPOSE: To investigate whether inactive thyroid-associated ophthalmopathy (TAO) affects retinal oxygen saturation and/or vessel diameter. METHODS: Via an observational case-control study, retinal circulation was measured in patients with inactive TAO (mild, moderate, and severe) and normal subjects by retinal oximetry. Complete ophthalmologic examination, including noncontact tonometry and Hertel exophthalmometry, was performed; history of smoking and dysthyroid disease were recorded...
November 23, 2016: Ophthalmic Plastic and Reconstructive Surgery
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