par De Backer, Daniel
Référence Hemodynamic Monitoring Using Echocardiography in the Critically Ill, Springer Berlin Heidelberg, page (71-77)
Publication Publié, 2011
Partie d'ouvrage collectif
Résumé : The fluid challenge can be applied as a technique to detect patients who may benefit from fluid administration, especially when methods predicting fluid responsiveness cannot be applied. It is important to evaluate the response to fluids, even when patients are predicted as responsive. Indeed, fluid responsiveness does not imply that fluids can be tolerated: sometimes the increase in preload results in a nontolerated increase in pulmonary capillary pressure, even when cardiac output increases. The principle of the fluid challenge is to evaluate the hemodynamic response to fluid administration. It implies that a given amount of fluid be administered over a relatively limited period of time and that the hemodynamic response be evaluated, both in terms of increase in stroke volume and in terms of tolerance, as estimated by left atrial pressure. With echocardiography, left atrial pressures, and changes thereof, are estimated by mitral inflow E and A waves. Changes in stroke volume are estimated at the left ventricular outflow tract level. © 2011 Springer-Verlag Berlin Heidelberg.