View clinical trials related to Shock, Septic.
Filter by:The main objective of this study is to evaluate in a population of patients with septic shock receiving 500 ml crystalloid over 10 minutes, the proportion of patients classified as "responders" to the fluid challenge (increase of at least 15% of ITV in aortic) at the end of vascular filling (T10) and becoming "non-responders" 20 minutes after the end of the fluid challenge (T30) and whether this proportion is greater than 10 points.
The purpose of this study is to find out whether stress doses of hydrocortisone attenuate coagulation dysfunction in patients with septic shock. And discuss the probable mechanism by which little doses of hydrocortisone influence coagulation system in sepsis.
Assess the effect of fluids and norepinephrine for mean arterial pressure titration to patients' usual level on the microcirculation of initial resuscitated hypertensive septic shock patients.
The purpose of this trial is to o assess feasibility of a protocol comparing conservative (trigger guided) vs. liberal (target guided) approach to fluid resuscitation in patients with septic shock after initial fluid resuscitation.
Septic shock (associated with relative adrenal insufficiency) is characterized by decreased arterial responsiveness to catecholamines. The association of hydrocortisone and fludrocortisone has demonstrated an improvement in survival in septic shock patients. If hydrocortisone has shown to increase vascular responsiveness, the role of fludrocortisone remains to be elucidated. The purpose of our study is to investigate the effect of a physiological dose of fludrocortisone alone on norepinephrine-mean arterial pressure dose-response relationship, gastric mucosal perfusion and arterial stiffness in patients with septic shock.
Beta adrenergic system, over-activated in septic shock patients, is a key modulator of the inflammatory response. Experimental works demonstrated that Esmolol, an highly selective beta-1 blocker, reduces heart rate and regulates the inflammatory response. A recent mono centric, double blind, randomized clinical work in septic shock patients has shown that Esmolol administration is safe and reduces effectively heart rate. However there are only sparse data on 1) regional and micro-circulation, 2) inflammation modulation in human resuscitated septic shock patients treated by esmolol.
Septic shock is a clinical syndrome occurring in 10 to 20% of patients admitted in ICV. Mortality associated to septic shock varies from 30 to 50%. It follows a systemic response of the organism to a severe infection, associated with a circulatory failure marker by an arterial hypotension and a vascular hyperactivity to vasoconstrictor agents. The mechanisms involved on one hand an activation of white blood cells inflammatory system and the vascular inflammatory system; and on the other hand on imbalance in hemostatis characterized by an activation of the coagulation and an inappropriate fibrinolysis leading to a disruption of microcirculation in the context of a disseminated intravascular coagulation (DIVC). This inflammatory and thrombotic cellular activation is strongly associated with the phenomenon of vesiculation; leading to the production of cellular microparticles (MP) by blood cells and vascular cells. MP are membranous vesicles, resulting in the reassortment of membrane phospholides in response to an activation of cellular apoptosis. They have been initially described as new actors of hemostatis. Indeed, the expression of phospholipid serine and tissular factor (TF) confer them a procoagulating activity, which increases in patients undergoing septic shock. The finding of a fibriniolytic activity of the cellular MP suggests the existence of compensating mechanisms with a procoagulating activity. This confers to MP a key-role in the control of the coagulolytic balance. Our recent researches suggest that endothelial and white blood cells MP produce in vivo plasmin. They carry into the main circulation a fibrinolytic activity which is partially beyond the physiological inhibitors activity (PAI-1, x 2 antiplasmin). Preliminary findings show that this ability of plasmin generation is important in patients affected with septic shock. Our hypothesis is that an increase in plasmin generation by MP compensates the risk of occurrence of microthrombosis, modulating therefore the vital prognosis of patients with septic shock. The coagulolytic balance of MP, which is resulting of their own procoagulating and fibrinolytic activities could claim the status of new pronostic marker relevant in patients with septic shock.
To observe the effect of early goal directed therapy (EGDT) on hepatic perfusion in patients with septic shock. Hypothesis: Hepatic perfusion did not improved after EGDT in patients with septic shock.
Vasopressin is a vasopressor used in patients with septic shock. However, its systemic hemodynamic effects and its microcirculation effects are not completely known and understood. This study aimed to evaluate the effect of exogenous vasopressin on sublingual microcirculation using the sidestream dark field technique and to correlate it with its systemic effects. To this prospective interventional study, patients with septic shock were included during the first 48 hours of use of catecholamine vasopressors, admitted to the intensive care unit of a university hospital. Vasopressin was administered at 0.04 U / min for one hour. Systemic hemodynamic measurements were obtained immediately before and 1 hour after vasopressin. In addition, images of sublingual microcirculation were collected through sidestream dark field technology. Further analysis with specific software was done after.
Fluid resuscitation remains the foundation for septic treatment.The evaluation of fluid responsiveness has significance in volume resuscitation for septic shock patients. As the sedative which is commonly used in ICU, Midazolam is supposed to change fluid responsiveness for the pharmacological effect of venodilation. However, the hypothesis has not been certified clinically. In this research, the investigators aim to test the hypothesis that Midazolam can increase fluid responsiveness(using passive leg raising test) in septic shock patients.