Ultrasound (main): Difference between revisions
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*GB wall is normally <3-4mm | *GB wall is normally <3-4mm | ||
**Measure the ant wall with a short-axis view | |||
*CBD | *CBD | ||
**Measure from inner to inner | **Measure from inner to inner | ||
Revision as of 00:26, 20 April 2011
Gallbladder
- GB wall is normally <3-4mm
- Measure the ant wall with a short-axis view
- CBD
- Measure from inner to inner
- Normal is up to 6mm to age 69 (add 1mm per decade thereafter)
- Acalculous cholecystitis
- GB is >10cm long & >4 cm wide
FAST
- Always point dot to pt Rt (usu at 45 degrees) or @ pt head
- Morrison's Pouch
- Best seen w/ probe around mid ax to ant ax line (esp w/ pt in trendelenberg)
- Splenorenal
- Place probe in post ax line
AAA
- Measure outer wall to outer wall from diaphragm to bifurcation
- Will avoid being fooled by an intramural thrombus
- Scan in both transverse and longitudinal axes
- Normal is <3cm
Cardiac
- Normal aortic root is <3.8 cm (parasternal view w/ dot pointing to Lt arm)
IVC
- Measure at IVC/RA junction
| 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 |
Source
Sonoguide