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sepsis physiology

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https://www.readbyqxmd.com/read/28107357/vasopressor-use-for-severe-hypotension-a-multicentre-prospective-observational-study
#1
Francois Lamontagne, Deborah J Cook, Maureen O Meade, Andrew Seely, Andrew G Day, Emmanuel Charbonney, Karim Serri, Yoanna Skrobik, Paul Hebert, Charles St-Arnaud, Hector Quiroz-Martinez, Michaël Mayette, Daren K Heyland
BACKGROUND: The optimal approach to titrate vasopressor therapy is unclear. Recent sepsis guidelines recommend a mean arterial pressure (MAP) target of 65 mmHg and higher for chronic hypertensive patients. As data emerge from clinical trials comparing blood pressure targets for vasopressor therapy, an accurate description of usual care is required to interpret study results. Our aim was to measure MAP values during vasopressor therapy in Canadian intensive care units (ICUs) and to compare these with stated practices and guidelines...
2017: PloS One
https://www.readbyqxmd.com/read/28105603/resuscitation-fluid-composition-affects-hepatic-inflammation-in-a-murine-model-of-early-sepsis
#2
Amanda L Patrick, Peter M Grin, Nicole Kraus, Michelle Gold, Matthew Berardocco, Patricia C Liaw, Alison E Fox-Robichaud
BACKGROUND: Fluid resuscitation is a crucial therapy for sepsis, and the use of balanced fluids and/or isotonic albumin may improve patient survival. We have previously demonstrated that resuscitation with normal saline results in increased hepatic leukocyte recruitment in a murine model of sepsis. Given that clinical formulations of albumin are in saline, our objectives were to develop a novel balanced electrolyte solution specifically for sepsis and to determine if supplementing this solution with albumin would improve the inflammatory response in sepsis...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28104273/physiologically-based-predictive-analytics-using-the-heart-rate-to-systolic-ratio-significantly-improves-the-timeliness-and-accuracy-of-sepsis-prediction-compared-to-sirs
#3
Omar K Danner, Sandra Hendren, Ethel Santiago, Brittany Nye, Prasad Abraham
BACKGROUND: Enhancing the efficiency of diagnosis and treatment of severe sepsis by using physiologically-based, predictive analytical strategies has not been fully explored. We hypothesize assessment of heart-rate-to-systolic-ratio significantly increases the timeliness and accuracy of sepsis prediction after emergency department (ED) presentation. METHODS: We evaluated the records of 53,313 ED patients from a large, urban teaching hospital between January and June 2015...
January 7, 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/28101752/the-impact-of-hydrocortisone-treatment-on-neutrophil-gelatinase-associated-lipocalin-release-in-porcine-endotoxemic-shock
#4
E Söderberg, M Eriksson, A Larsson, M Lipcsey
BACKGROUND: A key feature of sepsis is systemic inflammatory activation that could be counteracted by steroids. In this experimental model of systemic inflammation, we sought to investigate whether septic neutrophil activation, evaluated by the plasma levels of neutrophil gelatinase-associated protein (NGAL), is modulated by the timing of hydrocortisone treatment. METHODS: Sixteen anesthetized pigs were allocated to one of four equally sized groups. Three of these groups received endotoxin at 2 μg × kg(-1) × h(-1) for 6 h so as to induce endotoxemic shock...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28099636/use-of-reactive-hyperemia-peripheral-arterial-tonometry-and-circulating-biological-markers-to-predict-outcomes-in-sepsis
#5
Vandack Nobre, Thiago Bragança Ataíde, Luisa Caldeira Brant, Clara Rodrigues Oliveira, Lucas Vieira Rodrigues, Antonio Luiz Pinho Ribeiro, Fernanda Barbosa Lopes, Ivan Euclides Saraiva, Marcus Vinícius Andrade
Objective: To evaluate the usefulness and prognostic value of reactive hyperemia - peripheral arterial tonometry in patients with sepsis. Moreover, we investigated the association of reactive hyperemia - peripheral arterial tonometry results with serum levels of certain inflammatory molecules. Methods: Prospective study, conducted in an 18-bed mixed intensive care unit for adults. The exclusion criteria included severe immunosuppression or antibiotic therapy initiated more than 48 hours before assessment...
October 2016: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/28094172/interval-changes-in-myocardial-performance-index-predict-outcome-in-severe-sepsis
#6
Junaid Nizamuddin, Feroze Mahmood, Avery Tung, Ariel Mueller, Samuel M Brown, Shahzad Shaefi, Michael O'Connor, Daniel Talmor, Sajid Shahul
OBJECTIVES: Septic cardiomyopathy is a well-described consequence of septic shock and is associated with increased sepsis-related mortality. The myocardial performance index (MPI), a parameter derived from echocardiographic tissue Doppler measurements, allows for a more sensitive assessment of global cardiac function than do traditional metrics for cardiac function. The authors hypothesized that changes in left ventricular MPI in patients with severe sepsis would be associated with a higher 90-day mortality...
November 2, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28087409/thioredoxin-a-novel-biomarker-of-post-injury-sepsis
#7
Jesper Eriksson, Andreas Gidlöf, Mikael Eriksson, Emma Larsson, Olof Brattström, Anders Oldner
BACKGROUND: Thioredoxin (TRX), an endogenous anti-oxidant protein induced in inflammatory conditions, has been shown to increase in plasma and to be associated with outcome in septic patients. This biomarker has never been studied in a trauma setting. We hypothesized that TRX would be increased after trauma and associated with post-injury sepsis. METHODS: Single-centre prospective observational study conducted at the intensive care unit (ICU) at the Karolinska University Hospital, Stockholm, Sweden, a level-1 trauma centre...
January 10, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28081260/comparative-genome-sequencing-reveals-within-host-genetic-changes-in-neisseria-meningitidis-during-invasive-disease
#8
Johanna Klughammer, Marcus Dittrich, Jochen Blom, Vera Mitesser, Ulrich Vogel, Matthias Frosch, Alexander Goesmann, Tobias Müller, Christoph Schoen
Some members of the physiological human microbiome occasionally cause life-threatening disease even in immunocompetent individuals. A prime example of such a commensal pathogen is Neisseria meningitidis, which normally resides in the human nasopharynx but is also a leading cause of sepsis and epidemic meningitis. Using N. meningitidis as model organism, we tested the hypothesis that virulence of commensal pathogens is a consequence of within host evolution and selection of invasive variants due to mutations at contingency genes, a mechanism called phase variation...
2017: PloS One
https://www.readbyqxmd.com/read/28078833/clinical-profile-and-outcome-of-patients-with-severe-sepsis-treated-in-an-intensive-care-unit-in-india
#9
T T Paary, M S Kalaiselvan, M K Renuka, A S Arunkumar
Introduction: Sepsis is the leading cause of intensive care unit (ICU) admissions and is associated with high mortality. Objectives: To identify the incidence, risk factors and outcome of patients with severe sepsis and septic shock. Methods: A prospective observational study was done in a multidisciplinary ICU over a period of 18 months. We included all adult patients admitted to ICU with features of severe sepsis and septic shock as per SCCM/ACCP guidelines...
30, 2016: Ceylon Medical Journal
https://www.readbyqxmd.com/read/28069319/effect-of-ulinastatin-combined-with-thymosin-alpha1-on-sepsis-a-systematic-review-and-meta-analysis-of-chinese-and-indian-patients
#10
REVIEW
Dadong Liu, Zongying Yu, Jiangtao Yin, Yikun Chen, Hao Zhang, Fan Xin, Haiyan Fu, Bing Wan
PURPOSE: To assess the effects of urinary trypsin inhibitor (UTI) ulinastatin combined with thymosin alpha1 (Tα1) on sepsis. MATERIALS AND METHODS: The meta-analysis included 8 randomized controlled trials (N=1112 patients) on UTI-based therapy for sepsis published before July 10, 2016. Two investigators independently extracted data and assessed the quality of each study. The short-term mortality rate, duration of mechanical ventilator and vasopressor use, length of intensive care unit stay, Acute Physiology and Chronic Health Evaluation (APACHE) II score, and differences in inflammatory cytokines (interleukin [IL]-6, IL-10, and tumor necrosis factor α) were assessed using statistical software...
December 27, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/28067711/early-goal-directed-therapy-for-sepsis-a-novel-solution-for-discordant-survival-outcomes-in-clinical-trials
#11
Andre C Kalil, Daniel W Johnson, Steven J Lisco, Junfeng Sun
OBJECTIVES: Early goal-directed therapy has shown discordant survival outcomes in sepsis studies. We aim to find the reasons for this discordance. DESIGN: Random-effects and Bayesian hierarchical analyses. SETTING: Studies that evaluated early goal-directed therapy. SUBJECTS: Patients with severe sepsis and/or septic shock. INTERVENTIONS: Early goal-directed therapy. MEASUREMENTS AND MAIN RESULTS: A total of 19,998 patients were included in the main analysis: 31 observational (n = 15,656) and six randomized (n = 4,342) studies...
January 6, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28058551/modified-frailty-index-predicts-morbidity-and-mortality-after-pancreaticoduodenectomy
#12
Harveshp Mogal, Sarah A Vermilion, Rebecca Dodson, Fang-Chi Hsu, Russell Howerton, Perry Shen, Clancy J Clark
BACKGROUND: Pancreatic cancer is a disease of older adults, who may present with limited physiologic reserve. The authors hypothesized that a frailty index can predict postoperative outcomes after pancreaticoduodenectomy (PD). METHODS: All patients who underwent PD were identified in the 2005-2012 NSQIP Participant Use File. Patients undergoing emergency procedures, those with an American Society of Anesthesiologists (ASA) classification of five, and those with a diagnosis of preoperative sepsis were excluded from the study...
January 5, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28057212/regulation-of-cellular-immune-responses-in-sepsis-by-histone-modifications
#13
W F Carson, S L Kunkel
Severe sepsis, septic shock, and related inflammatory syndromes are driven by the aberrant expression of proinflammatory mediators by immune cells. During the acute phase of sepsis, overexpression of chemokines and cytokines drives physiological stress leading to organ failure and mortality. Following recovery from sepsis, the immune system exhibits profound immunosuppression, evidenced by an inability to produce the same proinflammatory mediators that are required for normal responses to infectious microorganisms...
2017: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/28050897/fluid-resuscitation-in-human-sepsis-time-to-rewrite-history
#14
REVIEW
Liam Byrne, Frank Van Haren
Fluid resuscitation continues to be recommended as the first-line resuscitative therapy for all patients with severe sepsis and septic shock. The current acceptance of the therapy is based in part on long history and familiarity with its use in the resuscitation of other forms of shock, as well as on an incomplete and incorrect understanding of the pathophysiology of sepsis. Recently, the safety of intravenous fluids in patients with sepsis has been called into question with both prospective and observational data suggesting improved outcomes with less fluid or no fluid...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28045915/alkalosis-in-critically-ill-patients-with-severe-sepsis-and-septic-shock
#15
Simon Kreü, Allan Jazrawi, Jan Miller, Amir Baigi, Michelle Chew
INTRODUCTION: Although metabolic alkalosis is a common occurrence in intensive care units (ICUs), no study has evaluated its prevalence or outcomes in patients with severe sepsis or septic shock. METHODS: This is a retrospective cohort study of critically ill patients suffering from severe sepsis and septic shock admitted to the ICUs of Halmstad and Varberg County hospitals. From 910 patient records, 627 patients met the inclusion criteria. We investigated the relationship between metabolic alkalosis and mortality...
2017: PloS One
https://www.readbyqxmd.com/read/28039606/development-of-a-physiologically-based-pharmacokinetic-modelling-approach-to-predict-the-pharmacokinetics-of-vancomycin-in-critically-ill-septic-patients
#16
Christian Radke, Dagmar Horn, Christian Lanckohr, Björn Ellger, Michaela Meyer, Thomas Eissing, Georg Hempel
BACKGROUND AND OBJECTIVES: Sepsis is characterised by an excessive release of inflammatory mediators substantially affecting body composition and physiology, which can be further affected by intensive care management. Consequently, drug pharmacokinetics can be substantially altered. This study aimed to extend a whole-body physiologically based pharmacokinetic (PBPK) model for healthy adults based on disease-related physiological changes of critically ill septic patients and to evaluate the accuracy of this PBPK model using vancomycin as a clinically relevant drug...
December 31, 2016: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28038428/ghrelin-upregulates-pept1-activity-in-the-small-intestine-epithelium-of-rats-with-sepsis
#17
Jingquan Liu, Bin Shi, Kai Shi, Guoguang Ma, Hongze Zhang, Xiaoli Lou, Hongxiang Liu, Shengxia Wan, Dongyu Liang
BACKGROUND: Sepsis causes nutritional substrate malabsorption; hence, preventing gut barrier problems and improving the nutritional status in sepsis is a compelling issue. AIMS: We tested whether ghrelin administration affects peptide transporter 1 (PepT1) activity in the intestinal epithelium of rats with sepsis. METHODS: Sixty male Sprague-Dawley rats were randomly divided into sham-operated, sepsis, and ghrelin-treated groups. The cecum of sham-operated rats was separated after laparotomy without ligation and perforation...
December 27, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28029485/shenfu-injection-for-improving-cellular-immunity-and-clinical-outcome-in-patients-with-sepsis-or-septic-shock
#18
Ning Zhang, Jianhua Liu, Zeliang Qiu, Yiping Ye, Jian Zhang, Tianzheng Lou
PURPOSE: To assess the efficacy of Shenfu injection (SFI) for enhancing cellular immunity and improving the clinical outcomes of patients with septic shock. METHODS: Patients with sepsis were randomly assigned to receive either SFI at a dose of 100mL every 24hours for 7 consecutive days or a placebo in addition to conventional therapy. The immunologic parameters were collected on days 1, 3, and 7 after the above treatments, and the clinical outcomes were updated for 28days...
September 7, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28024294/celecoxib-administration-reduced-mortality-mesenteric-hypoperfusion-aortic-dysfunction-and-multiple-organ-injury-in-septic-rats
#19
Erdem Kamil Ozer, Mustafa Tugrul Goktas, Ibrahim Kilinc, Hulagu Bariskaner, Ceyhan Ugurluoglu, Alper Bektas Iskit
BACKGROUND: The cyclooxygenase (COX)-2 overexpression is associated with vascular injury and multiple organ failure in sepsis. However, constitutive COX-1 and basal COX-2 expressions have physiological effects. We aimed to investigate the effects of partial and selective COX-2 inhibition without affecting constitutive COX-1 and basal COX-2 activities by celecoxib on mesenteric artery blood flow (MABF), vascular reactivity, oxidative and inflammatory injuries, and survival in septic rats accomplished by cecal ligation and puncture (CLP)...
December 23, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28018358/endothelial-response-to-glucocorticoids-in-inflammatory-diseases
#20
REVIEW
Karolina A Zielińska, Laura Van Moortel, Ghislain Opdenakker, Karolien De Bosscher, Philippe E Van den Steen
The endothelium plays a crucial role in inflammation. A balanced control of inflammation requires the action of glucocorticoids (GCs), steroidal hormones with potent cell-specific anti-inflammatory properties. Besides the classic anti-inflammatory effects of GCs on leukocytes, recent studies confirm that endothelial cells also represent an important target for GCs. GCs regulate different aspects of endothelial physiology including expression of adhesion molecules, production of pro-inflammatory cytokines and chemokines, and maintenance of endothelial barrier integrity...
2016: Frontiers in Immunology
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