Circulatory Failure, Respiratory Physiological Phenomena, Sepsis
Conditions
Keywords
vena cava, fluid, sepsis, echocardiography, ultrasound, ultrasonography, collapsibility index, circulatory failure, irregular cardiac rhythm, fluid responsiveness, Spontaneous breathing
Brief summary
Objectives: To investigate whether respiratory variations of inferior vena cava diameters (cIVC) predict fluid responsiveness in spontaneously breathing patients with septic acute circulatory failure and irregular heartbeats. Design: Prospective, bicentric study, intensive care units. Patients and measures: Spontaneously breathing patients with sepsis and clinical signs of acute circulatory failure are included. A positive response to fluid loading (FL) is defined as an increase of the stroke volume (SV) \>10%. The investigators measured the minimum inspiratory and maximum expiratory diameters of the IVC (idIVC and edIVC) during standardized (st) and unstandardized (ns) breathing. The investigators calculated cIVCst and cIVCns before a 500ml-colloid FL.
Interventions
Ultrasonographic recordings are recorded immediately before and after volume expansion (VE), performed as a 30-minute infusion of 500 mL of 4% gelatin. Inferior Vena Cava diameters are measured during spontaneous and standardized respiratory cycles. Stroke volume is measured during spontaneous respiratory cycles.
Sponsors
Study design
Eligibility
Inclusion criteria
* Adult patients of the intensive care units of the Lille university-hospital and of the Valencienne general hospital. * Age greater than or equal to 18. * Patient insured * Spontaneous breathing without ventilatory support or intubation or tracheotomy. * Irregular cardiac rhythm * Prescription by the physician in charge of the patients of a 500 mL volume expansion in less than 30 minutes. * Patients with sepsis with at least one sign of acute circulatory failure: * Tachycardia with heart rate\> 100/min * systolic blood pressure \<90mmHg or a decrease \>40mmHg in previously hypertense patient * Oliguria \<0.5ml/kg/hour for at least one hour * skin mottling
Exclusion criteria
* high-grade aortic insufficiency * transthoracic echogenicity unsuitable for measuring the stroke volume or inferior vena cava diameters * clinical signs of active exhalation * clinical or ultrasonographic evidence of pulmonary edema due to heart failure * pregnancy * abdominal compartment syndrome * regular cardiac rhythm
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| respiratory variations in inferior vena cava diameters with respect to the response to fluid resuscitation, assessed by the area under the ROC curve | during 30 minutes of the volume expansion |
Countries
France