Aortic ultrasound: Difference between revisions
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* | ==Technique== | ||
** | *Transverse | ||
**Scan | **Start in epigastrium (below diaphragm) with indicator at 9 o'clock (aorta on left/IVC on right) | ||
**use liver as window | |||
**identify vertebral body (shadowing) | |||
**rock/jiggle the probe to move bowel gas from view | |||
** Scan from celiac to bifurcation (near umbilicus) | |||
** Capture and measure the largest diameter | |||
*Sagittal | |||
**Rotate indicator to 12 o'clock (aorta on top/vertebra on bottom of screen) | |||
**make sure you're looking at aorta and not IVC (aorta may pulsate/IVC may be compressible) | |||
** Scan from bifurcation to celiac | |||
** Capture and measure sagittal views, including the largest diameter | |||
*Measurements | |||
**Normal is <3cm | **Normal is <3cm | ||
**measure outer wall to outer wall (make sure to include thrombus) | |||
**watch out for saccular aneurysms | |||
==Findings== | |||
*Abdominal Aortic Aneurysm | |||
** >3cm diameter (transverse or saggital) | |||
**look for free fluid | |||
**try to reproduce pain with probe | |||
**if clot, confirm flow with doppler | |||
*Aortic Dissection | |||
**double lumen separated by intimal flap | |||
**confirm with doppler | |||
==See Also== | ==See Also== | ||
| Line 9: | Line 33: | ||
==Source== | ==Source== | ||
Sonosite | 1. Sonosite | ||
[[Category: Cards]] | [[Category: Cards]] | ||
[[Category: Rads]] | [[Category: Rads]] | ||
Revision as of 07:32, 25 January 2012
Technique
- Transverse
- Start in epigastrium (below diaphragm) with indicator at 9 o'clock (aorta on left/IVC on right)
- use liver as window
- identify vertebral body (shadowing)
- rock/jiggle the probe to move bowel gas from view
- Scan from celiac to bifurcation (near umbilicus)
- Capture and measure the largest diameter
- Sagittal
- Rotate indicator to 12 o'clock (aorta on top/vertebra on bottom of screen)
- make sure you're looking at aorta and not IVC (aorta may pulsate/IVC may be compressible)
- Scan from bifurcation to celiac
- Capture and measure sagittal views, including the largest diameter
- Measurements
- Normal is <3cm
- measure outer wall to outer wall (make sure to include thrombus)
- watch out for saccular aneurysms
Findings
- Abdominal Aortic Aneurysm
- >3cm diameter (transverse or saggital)
- look for free fluid
- try to reproduce pain with probe
- if clot, confirm flow with doppler
- Aortic Dissection
- double lumen separated by intimal flap
- confirm with doppler
See Also
Source
1. Sonosite