Title: IVC Pitfalls<br/>
Author: Alexis Salerno<br/>
<a href='mailto:alexis.salerno@som.umaryland.edu'>[Click to email author]</a><hr/>
Link: <a href='https://umem.org/educational_pearls/4551/'>https://umem.org/educational_pearls/4551/</a><hr/><p>Many may look at the Inferior Vena Cava (IVC) to get a sense of a patient's “fluid responsiveness.” However, there are many pitfalls to using the IVC. An article by Via et al outlines these pitfalls and is an interesting read! </p>
<p>To summarize, IVC can be affected by:</p>
<ol>
<li>Ventilator Settings such as high PEEP</li>
<li>Patient's inspiratory efforts such as significant respiratory efforts</li>
<li>Asthma/COPD exacerbations</li>
<li>Cardiac Conditions impeding venous return such as tamponade or RV dysfunction</li>
<li>Increased abdominal pressure such as intra-abdominal hypertension</li>
<li>Other factors such as asking the patient to take a breath in, poor measurements, ivc compression by masses or ECMO cannulae</li>
</ol>
<p>Bottom Line: Think twice before using IVC to evaluate for fluid responsiveness.</p>
<fieldset><legend>References</legend><p>Via G, Tavazzi G, Price S. Ten situations where inferior vena cava ultrasound may fail to accurately predict fluid responsiveness: a physiologically based point of view. Intensive Care Med. 2016 Jul;42(7):1164-7. doi: 10.1007/s00134-016-4357-9.</p>
</fieldset>