Bladder ultrasound: Difference between revisions
(additional information) |
No edit summary |
||
| Line 1: | Line 1: | ||
==Background== | ==Background== | ||
*Identification: anechoic (black) fluid within a structure defined by hyperechoic (white) appearing borders | *Identification: anechoic (black) fluid within a structure defined by hyperechoic (white) appearing borders | ||
*Bladder volume = length x width x | *Bladder volume = length x width x height x 0.52<ref>Dicuio M et al. Measurements of urinary bladder volume: comparison of five ultrasound calculation methods in volunteers. Arch Ital Urol Androl. 2005 Mar;77(1):60-2.</ref> | ||
==Technique== | ==Technique== | ||
*Phased array or Curvilinear | *Phased array or Curvilinear | ||
*Suprapubic: look both transverse and sagittal | *Suprapubic: look both transverse and sagittal | ||
** | **Usually need to turn down far gain 2/2 acoustic enhancement from bladder | ||
*Color over the inferior border can demonstrate ureteral jets | *Color over the inferior border can demonstrate ureteral jets | ||
**Twinkle Sign: rapid alternation of color immediately behind a stationary echogenic object, acquiring a false appearance of movement | **Twinkle Sign: rapid alternation of color immediately behind a stationary echogenic object, acquiring a false appearance of movement | ||
| Line 16: | Line 16: | ||
==Clinical Uses== | ==Clinical Uses== | ||
*Look for free fluid (abdominal or pelvic) | *Look for free fluid (abdominal or pelvic) | ||
*Can be used to calculate post void residual non invasively | *Can be used to calculate post void residual non-invasively | ||
*Confirm foley placement by visualizing balloon | *Confirm foley placement by visualizing balloon | ||
*Ureteral obstruction | *Ureteral obstruction | ||
| Line 23: | Line 23: | ||
==Source== | ==Source== | ||
<references/> | |||
==See Also== | ==See Also== | ||
Revision as of 08:23, 4 April 2015
Background
- Identification: anechoic (black) fluid within a structure defined by hyperechoic (white) appearing borders
- Bladder volume = length x width x height x 0.52[1]
Technique
- Phased array or Curvilinear
- Suprapubic: look both transverse and sagittal
- Usually need to turn down far gain 2/2 acoustic enhancement from bladder
- Color over the inferior border can demonstrate ureteral jets
- Twinkle Sign: rapid alternation of color immediately behind a stationary echogenic object, acquiring a false appearance of movement
- Can indicate stone in the UVJ
- Twinkle Sign: rapid alternation of color immediately behind a stationary echogenic object, acquiring a false appearance of movement
- Lack of jet on one side can indicate ureteral obstruction
- Anechoic (black) fluid outside the bladder: Free Fluid
- Look for 'pointy edges:' increases suspicion for fluid not in another structure (cyst, ovary, bowel, etc)
Clinical Uses
- Look for free fluid (abdominal or pelvic)
- Can be used to calculate post void residual non-invasively
- Confirm foley placement by visualizing balloon
- Ureteral obstruction
- Nephrolithiasis in the UVJ
- Possible to see ectopic pregnancy
Source
- ↑ Dicuio M et al. Measurements of urinary bladder volume: comparison of five ultrasound calculation methods in volunteers. Arch Ital Urol Androl. 2005 Mar;77(1):60-2.