Browsing by Author "De Backer, Daniel"
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- ItemCombination of arterial lactate levels and venous-arterial CO2 to arterial-venous O-2 content difference ratio as markers of resuscitation in patients with septic shock(2015) Ospina-Tascon, Gustavo A.; Umana, Mauricio; Bermudez, William; Bautista-Rincon, Diego F.; Hernández P., Glenn; Bruhn, Alejandro; Granados, Marcela; Salazar, Blanca; Arango-Dávila, César; De Backer, Daniel
- ItemConsistency of data reporting in fluid responsiveness studies in the critically ill setting: the CODEFIRE consensus from the Cardiovascular Dynamic section of the European Society of Intensive Care Medicine(2024) Messina, Antonio; Chew, Michelle S.; Poole, Daniele; Calabro, Lorenzo; De Backer, Daniel; Donadello, Katia; Hernandez, Glenn; Hamzaoui, Olfa; Jozwiak, Mathieu; Lai, Christopher; Malbrain, Manu L. N. G.; Mallat, Jihad; Myatra, Sheyla Nainan; Muller, Laurent; Ospina-Tascon, Gustavo; Pinsky, Michael R.; Preau, Sebastian; Saugel, Bernd; Teboul, Jean-Louis; Cecconi, Maurizio; Monnet, XavierPurposeTo provide consensus recommendations regarding hemodynamic data reporting in studies investigating fluid responsiveness and fluid challenge (FC) use in the intensive care unit (ICU).MethodsThe Executive Committee of the European Society of Intensive Care Medicine (ESICM) commissioned and supervised the project. A panel of 18 international experts and a methodologist identified main domains and items from a systematic literature, plus 2 ancillary domains. A three-step Delphi process based on an iterative approach was used to obtain the final consensus. In the Delphi 1 and 2, the items were selected with strong (>= 80% of votes) or week agreement (70-80% of votes), while the Delphi 3 generated recommended (>= 90% of votes) or suggested (80-90% of votes) items (RI and SI, respectively).ResultsWe identified 5 main domains initially including 117 items and the consensus finally resulted in 52 recommendations or suggestions: 18 RIs and 2 SIs statements were obtained for the domain "ICU admission", 11 RIs and 1 SI for the domain "mechanical ventilation", 5 RIs for the domain "reason for giving a FC", 8 RIs for the domain pre- and post-FC "hemodynamic data", and 7 RIs for the domain "pre-FC infused drugs". We had no consensus on the use of echocardiography, strong agreement regarding the volume (4 ml/kg) and the reference variable (cardiac output), while weak on administration rate (within 10 min) of FC in this setting.ConclusionThis consensus found 5 main domains and provided 52 recommendations for data reporting in studies investigating fluid responsiveness in ICU patients.
- ItemDirect assessment of microcirculation in shock: a randomized-controlled multicenter study(2023) Bruno, Raphael Romano; Wollborn, Jakob; Fengler, Karl; Flick, Moritz; Jung, Christian; Allgaeuer, Sebastian; Thiele, Holger; Schemmelmann, Mara; Hornemann, Johanna; Moecke, Helene Mathilde Emilie; Demirtas, Filiz; Palici, Lina; Franz, Marcus; Saugel, Bernd; Kattan, Eduardo; De Backer, Daniel; Bakker, Jan; Hernandez, Glenn; Kelm, Malte; Jung, ChristianPurpose: Shock is a life-threatening condition characterized by substantial alterations in the microcirculation. This study tests the hypothesis that considering sublingual microcirculatory perfusion variables in the therapeutic management reduces 30-day mortality in patients admitted to the intensive care unit (ICU) with shock.
- ItemEffective hemodynamic monitoring(2022) Pinsky, Michael R.; Cecconi, Maurizio; Chew, Michelle S.; De Backer, Daniel; Douglas, Ivor; Edwards, Mark; Hamzaoui, Olfa; Hernández P., Glenn; Martin, Greg; Monnet, Xavier; Saugel, Bernd; Scheeren, Thomas W. L.; Teboul, Jean-Louis; Vincent, Jean-LouisHemodynamic monitoring is the centerpiece of patient monitoring in acute care settings. Its effectiveness in terms of improved patient outcomes is difficult to quantify. This review focused on effectiveness of monitoring-linked resuscitation strategies from: (1) process-specific monitoring that allows for non-specific prevention of new onset cardiovascular insufficiency (CVI) in perioperative care. Such goal-directed therapy is associated with decreased perioperative complications and length of stay in high-risk surgery patients. (2) Patient-specific personalized resuscitation approaches for CVI. These approaches including dynamic measures to define volume responsiveness and vasomotor tone, limiting less fluid administration and vasopressor duration, reduced length of care. (3) Hemodynamic monitoring to predict future CVI using machine learning approaches. These approaches presently focus on predicting hypotension. Future clinical trials assessing hemodynamic monitoring need to focus on process-specific monitoring based on modifying therapeutic interventions known to improve patient-centered outcomes.
- ItemEffects of dobutamine on intestinal microvascular blood flow heterogeneity and O2 extraction during septic shock(2017) Ospina-Tascón, Gustavo A.; García Marín, Alberto F.; Echeverri, Gabriel J.; Bermúdez, William F.; Madriñán-Navia, Humberto; Valencia, Juan David; Quiñones, Edgardo; Rodríguez, Fernando; Bruhn, Alejandro; Hernández P., Glenn; Marulanda, Angela; Arango-Dávila, César A.; De Backer, Daniel
- ItemImmediate Norepinephrine in Endotoxic Shock: Effects on Regional and Microcirculatory Flow*(2023) Ospina-Tascon, Gustavo A.; Aldana, Jose L.; Marin, Alberto Garcia F.; Calderon-Tapia, Luis E.; Marulanda, Angela; Escobar, Elena P.; Garcia-Gallardo, Gustavo; Orozco, Nicolas; Velasco, Maria I.; Rios, Edwin; De Backer, Daniel; Hernandez, Glenn; Bakker, JanOBJECTIVES:To investigate the effects of immediate start of norepinephrine versus initial fluid loading followed by norepinephrine on macro hemodynamics, regional splanchnic and intestinal microcirculatory flows in endotoxic shock. DESIGN:Animal experimental study. SETTING:University translational research laboratory. SUBJECTS:Fifteen Landrace pigs. INTERVENTIONS:Shock was induced by escalating dose of lipopolysaccharide. Animals were allocated to immediate start of norepinephrine (i-NE) (n = 6) versus mandatory 1-hour fluid loading (30 mL/kg) followed by norepinephrine (i-FL) (n = 6). Once mean arterial pressure greater than or equal to 75 mm Hg was, respectively, achieved, successive mini-fluid boluses of 4 mL/kg of Ringer Lactate were given whenever: a) arterial lactate greater than 2.0 mmol/L or decrease less than 10% per 30 min and b) fluid responsiveness was judged to be positive. Three additional animals were used as controls (Sham) (n = 3). Time x group interactions were evaluated by repeated-measures analysis of variance. MEASUREMENTS AND MAIN RESULTS:Hypotension was significantly shorter in i-NE group (7.5 min [5.5-22.0 min] vs 49.3 min [29.5-60.0 min]; p < 0.001). Regional mesenteric and microcirculatory flows at jejunal mucosa and serosa were significantly higher in i-NE group at 4 and 6 hours after initiation of therapy (p = 0.011, p = 0.032, and p = 0.017, respectively). Misdistribution of intestinal microcirculatory blood flow at the onset of shock was significantly reversed in i-NE group (p < 0.001), which agreed with dynamic changes in mesenteric-lactate levels (p = 0.01) and venous-to-arterial carbon dioxide differences (p = 0.001). Animals allocated to i-NE showed significantly higher global end-diastolic volumes (p = 0.015) and required significantly less resuscitation fluids (p < 0.001) and lower doses of norepinephrine (p = 0.001) at the end of the experiment. Pulmonary vascular permeability and extravascular lung water indexes were significantly lower in i-NE group (p = 0.021 and p = 0.004, respectively). CONCLUSIONS:In endotoxemic shock, immediate start of norepinephrine significantly improved regional splanchnic and intestinal microcirculatory flows when compared with mandatory fixed-dose fluid loading preceding norepinephrine. Immediate norepinephrine strategy was related with less resuscitation fluids and lower vasopressor doses at the end of the experiment.
- ItemPathophysiology of fuid administration in critically ill patients(2022) Messina, Antonio; Bakker, Jan; Chew, Michelle; De Backer, Daniel; Hamzaoui, Olfa; Hernández P., Glenn; Myatra, Sheila N.; Monnet, Xavier; Ostermann, Marlies; Pinsky, Michael; Teboul, Jean-Louis; Cecconi, MaurizioFluid administration is a cornerstone of treatment of critically ill patients. The aim of this review is to reappraise the pathophysiology of fluid therapy, considering the mechanisms related to the interplay of flow and pressure variables, the systemic response to the shock syndrome, the effects of different types of fluids administered and the concept of preload dependency responsiveness. In this context, the relationship between preload, stroke volume (SV) and fluid administration is that the volume infused has to be large enough to increase the driving pressure for venous return, and that the resulting increase in end-diastolic volume produces an increase in SV only if both ventricles are operating on the steep part of the curve. As a consequence, fluids should be given as drugs and, accordingly, the dose and the rate of administration impact on the final outcome. Titrating fluid therapy in terms of overall volume infused but also considering the type of fluid used is a key component of fluid resuscitation. A single, reliable, and feasible physiological or biochemical parameter to define the balance between the changes in SV and oxygen delivery (i.e., coupling “macro” and “micro” circulation) is still not available, making the diagnosis of acute circulatory dysfunction primarily clinical.
- ItemSecond consensus on the assessment of sublingual microcirculation in critically ill patients: results from a task force of the European Society of Intensive Care Medicine(2018) Ince, Can; Boerma, E. Christiaan; Cecconi, Maurizio; De Backer, Daniel; Shapiro, Nathan I.; Duranteau, Jacques; Pinsky, Michael R.; Artigas, Antonio; Hernández P., Glenn; Bakker, Jan; et al.
- ItemStatistical analysis plan for hemodynamic phenotype-based, capillary refill time-targeted resuscitation in early septic shock: the ANDROMEDA-SHOCK-2 randomized clinical trial(Associacao de Medicina Intensiva Brasileira - AMIB, 2025) Orozco, Nicolás; Garcia-Gallardo, Gustavo; Cavalcanti, Alexandre Biasi; Dos Santos, Tiago Mendonça; Ospina-Tascón, Gustavo; Bakker, Jan; Morales Ahumada, Sebastián Alonso; Ramos, Karla; Alegría Vargas, Leyla; Teboul, Jean Louis; De Backer, Daniel; Vieillard-Baron, Antoine; Hernández, Liliana Vallecilla; de Lima, Lucas Martins; Damiani, Lucas Petri; Sady, Erica Ribeiro; Santucci, Eliana Vieira; Hernández P., Glenn; Kattan Tala, Eduardo JoséBackground: ANDROMEDA-SHOCK 2 is an international, multicenter, randomized controlled trial comparing hemodynamic phenotype-based, capillary refill time-targeted resuscitation in early septic shock to standard care resuscitation to test the hypothesis that the former is associated with lower morbidity and mortality in terms of hierarchal analysis of outcomes. Objective: To report the statistical plan for the ANDROMEDA--SHOCK 2 randomized clinical trial. Methods: We briefly describe the trial design, patients, methods of randomization, interventions, outcomes, and sample size. We portray our planned statistical analysis for the hierarchical primary outcome using the stratified win ratio method, as well as the planned analysis for the secondary and tertiary outcomes. We also describe the subgroup and sensitivity analyses. Finally, we provide details for presenting our results, including mock tables, baseline characteristics, and the effects of treatments on outcomes. Conclusion: According to best trial practices, we report our statistical analysis plan and data management plan prior to locking the database and initiating the analyses. We anticipate that this practice will prevent analysis bias and improve the utility of the study’s reported results.
- ItemThe Endothelium in Sepsis(2016) Ince, Can; Mayeux, Philip R.; Nguyen, Trung; Gómez, Hernando; Kellum, John A.; Ospina Tascón, Gustavo A.; Hernández P., Glenn; Murray, Patrick; De Backer, Daniel