IVC ultrasound: Difference between revisions
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Kghaffarian (talk | contribs) (added additional technique, changed right ventricle to atrium) |
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==Technique== | ==Technique== | ||
*Use phased array probe | *Use phased array probe | ||
*In subxyphoid cardiac view (epigastric), fan probe inferiorly to view the IVC draining into the right | *In subxyphoid cardiac view (epigastric), fan probe inferiorly to view the IVC draining into the right atrium | ||
*In the RUQ, slide the probe posteriorly to view the IVC draining into the | **may start with subxyphoid view, place right atrium in center of screen and rotate probe 90 degrees clockwise to find IVC | ||
*In the RUQ, slide the probe posteriorly to view the IVC draining into the right atrium | |||
==Measurements== | ==Measurements== | ||
Revision as of 22:51, 5 March 2015
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 atrium
- may start with subxyphoid view, place right atrium in center of screen and rotate probe 90 degrees clockwise to find IVC
- In the RUQ, slide the probe posteriorly to view the IVC draining into the right atrium
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