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Determining the appropriate amount of fluid resuscitation to administer to a critically ill patient is a complex decision.
Traditional tools for the assessment of preload sensitivity such as central venous pressure (CVP) and pulmonary artery occlusion
pressure (PAOP) are inaccurate in predicting whether a patient requires volume resuscitation . Diagnostic ultrasonography in
the form of echocardiography offers an alternative means of determining whether a patient is preload sensitive.