Inferior Vena Cava Compliance in Trans-thoracic Echocardiography: is the Trans-hepatic Window as Reliable as the Subcostal One - Trial NCT04866095

Timeline & Enrollment

Primary Outcome

Difference of sensitivity between the trans-hepatic window versus the subcostal window with TTE,Difference of specificity between the trans-hepatic window versus the subcostal window with TTE

Summary

The ability to assess intravascular volume is an essential part of perioperative care:
 insufficient intravascular volume can result in decreased oxygen delivery to tissues and
 organ dysfunction, while fluid overload can contribute to the development of oedema, organ
 dysfunction, respiratory failure and healing defect.
 
 At the present state, there are many different methods of interpreting intravascular
 circulating blood volume. Non-invasive techniques such as the Clear Sight System, and the
 transthoracic echocardiogram (TTE) have been proposed as non-invasive methods to assess
 patient' blood volume.
 
 The aim of this study is to assess whether the measure of the inferior vena cava (IVC) in the
 trans-hepatic window is as reliable as in the subcostal window to determine fluid
 responsiveness in perioperative patients. In this study, preload increase will be obtained
 through passive leg raising. Sensibility and specificity of the two echocardiographic
 approaches to predict fluid responsiveness will be compared while using the subcostal window
 as the gold standard. The effect of passive leg elevation on patient's cardiac output
 response will be assessed with two different non-invasive techniques: the Clear Sight system
 and the TTE.

ICD-10 Classifications