DVT ultrasound: Difference between revisions
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==Technique== | ==Technique== | ||
# | #Select transducer | ||
# | #*Linear array vascular probe 6–10 MHz | ||
# | #*6–8cm width ideal (for larger patients, consider abdominal probe) | ||
#Compression | #Compression | ||
# | #*Compress vein with transducer (probe transverse to vein) | ||
# | #*Touching of anterior and posterior walls = normal | ||
# | #*No touching with pressures sufficient to deform the artery = likely DVT | ||
#Common Femoral Vein | #Common Femoral Vein | ||
# | #*Patient positioning | ||
# | #**Reverse trendelenberg or semi-sitting with 30 degrees of hip flexion | ||
# | #**Mild external rotation (30 degrees) hip | ||
# | #*Probe at medial inguinal crease | ||
# | #*Apply compression every centimeter | ||
# | #*Continue distal to 1-2cm beyond bifurcation of the common femoral vein (into superficial and deep branches) | ||
#Popliteal vein | #Popliteal vein | ||
# | #*Patient positioning | ||
# | #**Prone, decubitus position, or seated on edge of gurney | ||
# | #**Knee flexed 10–30 degree | ||
# | #**Reverse trendelenberg | ||
# | #*12cm superior, to 5cm inferior to the popliteal crease | ||
# | #**Vein usually superficial to artery | ||
==See Also== | ==See Also== | ||
Revision as of 15:42, 1 November 2015
Background
- Non-compressible vein may be mistaken for an artery, leading to a false negative result
- An artery may be mistaken for a non-compressible vein, leading to a false positive result
Anatomy
Leg Vein Anatomy
Significant risk of PE:
- Common femoral vein
- (Superficial) femoral vein
- (Superficial) femoral vein is part of the deep system, not the superficial system as the name suggests!
- Popliteal veins
Technique
- Select transducer
- Linear array vascular probe 6–10 MHz
- 6–8cm width ideal (for larger patients, consider abdominal probe)
- Compression
- Compress vein with transducer (probe transverse to vein)
- Touching of anterior and posterior walls = normal
- No touching with pressures sufficient to deform the artery = likely DVT
- Common Femoral Vein
- Patient positioning
- Reverse trendelenberg or semi-sitting with 30 degrees of hip flexion
- Mild external rotation (30 degrees) hip
- Probe at medial inguinal crease
- Apply compression every centimeter
- Continue distal to 1-2cm beyond bifurcation of the common femoral vein (into superficial and deep branches)
- Patient positioning
- Popliteal vein
- Patient positioning
- Prone, decubitus position, or seated on edge of gurney
- Knee flexed 10–30 degree
- Reverse trendelenberg
- 12cm superior, to 5cm inferior to the popliteal crease
- Vein usually superficial to artery
- Patient positioning
See Also
Source
Sonoguide.com