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Compliance changes in venous insufficiency

B Sutor1, J L Heser, T W Rooke

  • 1Mayo Clinic, Rochester, Minnesota.

Angiology
|October 1, 1993
PubMed
Summary
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Lower limb venous valvular insufficiency impairs calf muscle pump function and alters calf compliance. These changes are measurable using strain gauge plethysmography, aiding in diagnosing venous disease.

Area of Science:

  • Vascular Medicine
  • Physiology

Background:

  • Venous valvular insufficiency is a common condition affecting lower limbs.
  • Accurate assessment of calf muscle pump function and venous refilling is crucial for diagnosis.

Purpose of the Study:

  • To evaluate calf muscle pump function, calf compliance, and venous refilling times in patients with suspected lower limb venous valvular insufficiency.
  • To correlate these physiological parameters with disease severity.

Main Methods:

  • Strain gauge plethysmography was used to measure calf muscle pump function, calf compliance, and venous refilling times (T90) after deep knee bends.
  • Patients were categorized based on T90: normal, mild/moderate, severe venous insufficiency, and nonvenous edema.

Main Results:

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  • Pump function was reduced in all non-control categories compared to normal.
  • Calf compliance was increased in the severe reflux category.
  • Paired analysis of limbs revealed decreased pump function and increased calf compliance in diseased limbs.

Conclusions:

  • Lower limb venous valvular insufficiency significantly impairs calf muscle pump function.
  • Calf compliance is altered, particularly in severe cases.
  • Strain gauge plethysmography is a valuable tool for assessing these hemodynamic changes in venous disease.