IVC ultrasound

Revision as of 22:12, 1 January 2014 by Mcamilon (talk | contribs) (dif views)

Background

  • Inferior vena cava ultrasound measurements
  • >50% collapse correlates with CVP <8
  • Unclear if able to use in intubated patients

Technique

  • Use phased array probe
  • In subxyphoid cardiac view (epigastric), fan probe inferiorly to view the IVC draining into the right ventricle
  • In the RUQ, slide the probe posteriorly to view the IVC draining into the RV

Measurements

IVC  % Collapse during inspiration^ CVP
<1.5cm >50% 0-5
1.5-2.5cm >50% 5-10
1.5-2.5cm <50% 10-15
>2.5cm Little phasicity 15-20

^Measure ~2cm from IVC/RA junction

  • Can ask patient to sniff or valsalva to evaluate collapse

See Also