Difference between revisions of "IVC ultrasound"
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==Background== | ==Background== | ||
*Inferior vena cava ultrasound measurements | *Inferior vena cava ultrasound measurements | ||
| − | *>50% collapse correlates with CVP <8 | + | *>50% collapse correlates with CVP < 8 |
*Unclear if able to use in intubated patients | *Unclear if able to use in intubated patients | ||
Revision as of 22:00, 21 May 2014
Contents
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