LV Diastolic Function vs IVC Diameter Variation as Predictor of Fluid Responsiveness in Shock

Study Overview
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Brief Summary
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Fluid responsive is defined as increasing in Cardiac output or Stroke volume by 10-15% after fluid challenge. Left ventricular diastolic dysfunction is associated with lower left ventricular end-diastolic volume (LVEDV) resulting in a less cardiac output increment after fluid challenge. However, Left ventricular diastolic function indicated by the Mitral E/e' ratio from transthoracic echocardiography, was rarely studied for fluid responsiveness evaluation.

Detailed Description
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Fluid therapy is one of the main treatments in patients with shock to increase Oxygen delivery by increasing Cardiac output or Stroke volume. However excess fluid intake may cause fluid overload, resulting in tissue edema, lung edema and organ dysfunction, which can lead to patient deterioration. Fluid responsiveness, defined as increasing in Cardiac output or Stroke volume by 10-15% after fluid challenge, is being recommended to evaluate in-patients with shock, according to European Society of Intensive Care Medicine (ESICM). Cardiac output measurement is often invasive or requires an expensive device, therefore, tests for predicting fluid responsiveness have been used to substitute direct Cardiac output measurement. Left ventricular diastolic dysfunction is associated with a decreasing Left ventricular end-diastolic volume, resulting in a less cardiac output increment after fluid challenge and can be measured by using Mitral E/e' ratio via transthoracic echocardiography. Despite being a non-invasive test, the Mitral E/e' ratio obtained from Echocardiography was rarely studied for the prediction of fluid responsiveness.

Official Title
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Left Ventricular Diastolic Function Compare to Inferior Vena Cava Diameter Variation as Predictor of Fluid Responsiveness in Mechanical Ventilated Patients With Shock

Conditions
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Shock, Septic Shock

Intervention / Treatment
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* Diagnostic Test: Left ventricular diastolic function
* Diagnostic Test: Inferior vena cava variation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age more than 18 years Diagnosis of shock defined by systolic blood pressure < 90 mmHg or mean arterial blood pressure < 65 mmHg and/or clinical hypoperfusion Mechanically ventilated without ventilator dyssynchrony and no ventilator triggering Present of central venous cather or arterial catheter Exclusion Criteria: Age < 18 years Frankly hypovolemic shock or hemorrhagic shock Suspicious of cardiogenic shock Suspicious of acute decompensated heart failure Suspicious of acute coronary syndrome Denied participation or denied inform consent

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Interventional Model Description: Pre-experimental study
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Fluid responsive test<br>Measure cardiac output, inferior vena cava (IVC) diameter variation and LV diastolic function (E/e') baseline Fluid challenge Measure cardiac output, IVC diameter variation and LV diastolic function (E/e') after fluid challenge | Diagnostic Test: Left ventricular diastolic function<br>* Transthoracic echocardiography Mitral E/e'<br>* Other names: Mitral E/e';Diagnostic Test: Inferior vena cava variation<br>* Inferior vena cava variation from ultrasound<br>* Other names: IVC variation;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Fluid responsiveness | Fluid responsiveness defined by increase in cardiac output at least 15% or increase in systolic blood pressure at least 10 mmHg or increase in mean arterial pressure at least 5 mmHg. | 6 hours | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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shock, fluid responsiveness, left ventricular diastolic dysfunction, Mitral E/e'