Venous Doppler
Purpose: Detect venous insufficiency at various points along the venous system. This is the most reliable clinical method of detecting venous insufficiency with a sensitivity (0.97, 0.82, and 0.80, respectively) and specificity (0.73, 0.92, and 0.90, respectively) (Kim, Richards & Kent, 2000, p. 171)
Procedure: "Using a continuous wave, hand held Doppler (Huntleigh Technologies, UK) with an 8 MHz probe, the patient was asked to bear weight on the leg not under investigation. The femoral pulse was located in the groin and the probe moved medially to locate the SFJ.
The calf was squeezed and augmentation of venous flow was noted. On calf release, the presence of reflux was noted (second swish). Reflux lasting greater than 0.5 s was deemed to be significant. The probe was subsequently placed over the LSV at the level of the knee and the procedure repeated to determine the presence of reflux in the LSV. The procedure was then repeated over the sapheno-popliteal junction (SPJ) behind the knee (Kim, Richards & Kent, 2000, p. 172).
Normal Result: No venous back flow is heard on squeezing of the limb (one swish is heard).
Abnormal Result: Venous back flow is heard on squeezing of the limb (two swishes are heard) >.5 seconds in duration.
Reference
Kim, J., Richards, S., & Kent, P. J. (2000). Clinical examination of varicose veins--a validation study. Annals of the Royal College of Surgeons of England, 82(3), 171.
Procedure: "Using a continuous wave, hand held Doppler (Huntleigh Technologies, UK) with an 8 MHz probe, the patient was asked to bear weight on the leg not under investigation. The femoral pulse was located in the groin and the probe moved medially to locate the SFJ.
The calf was squeezed and augmentation of venous flow was noted. On calf release, the presence of reflux was noted (second swish). Reflux lasting greater than 0.5 s was deemed to be significant. The probe was subsequently placed over the LSV at the level of the knee and the procedure repeated to determine the presence of reflux in the LSV. The procedure was then repeated over the sapheno-popliteal junction (SPJ) behind the knee (Kim, Richards & Kent, 2000, p. 172).
Normal Result: No venous back flow is heard on squeezing of the limb (one swish is heard).
Abnormal Result: Venous back flow is heard on squeezing of the limb (two swishes are heard) >.5 seconds in duration.
Reference
Kim, J., Richards, S., & Kent, P. J. (2000). Clinical examination of varicose veins--a validation study. Annals of the Royal College of Surgeons of England, 82(3), 171.
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