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Effect of Colloids Versus Crystalloids on Heart Mechanics: a Double-blind Cross Over Randomized Trial
Sponsor: University of Monastir
Summary
The debate over whether to use colloid or crystalloid solutions for fluid resuscitationis still ongoing. Colloid solutions consist of large molecules that generally cannot pass through healthy capillary membranes, whereas crystalloid solutions contain ions that easily move from the intravascular space to the interstitial compartment. Therefore, it is traditionally argued that colloids are more effective at expanding intravascular volume, with a suggested ratio of 1:3 compared to crystalloids. However, there is currently limited evidence to suggest that resuscitation with one type of fluid is more effective or safer than t he other. Despite these theoretically advantageousphysiological properties, colloids have not demonstrated a clear hemodynamic benefit over crystalloids. We hypothesized that these unexpected discrepancies may be attributed to different mechanical heart responses.
Key Details
Gender
All
Age Range
18 Years - 60 Years
Study Type
INTERVENTIONAL
Enrollment
16
Start Date
2025-04-01
Completion Date
2025-09-30
Last Updated
2025-03-28
Healthy Volunteers
Yes
Interventions
Gelafundin
Volunteers will undergo a comprehensive transthoracic echocardiography to measure left ventricular torsion, global longitudinal strain, left atrial strain and free wall right ventricular strain before any intervention. Initially, 500 ml of the specified but blinded solution will be administered, followed by a repeat of the echocardiographic process. Subsequently, an additional 500 ml will be given, totaling 1000 ml, and strain curves will be reacquired. After a washout period of 7 days, the same procedure will be repeated with the second solution.
Saline (NaCl 0,9 %) (placebo)
Volunteers will undergo a comprehensive transthoracic echocardiography to measure left ventricular torsion, global longitudinal strain, left atrial strain and free wall right ventricular strain before any intervention. Initially, 500 ml of the specified but blinded solution will be administered, followed by a repeat of the echocardiographic process. Subsequently, an additional 500 ml will be given, totaling 1000 ml, and strain curves will be reacquired. After a washout period of 7 days, the same procedure will be repeated with the second solution
Locations (1)
Fattouma Bourguiba Hospital
Monastir, Tunisia, Tunisia