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[Volumetrics: an indispensable complementary test in lymphology]
1Unité fonctionnelle de médecine vasculaire, université de Paris VI, Faculté Saint-Antoine, hôpital Tenon, 4, rue de la Chine, 75020 Paris, France.
Summary
Accurate limb volume measurement is crucial for early lymphedema diagnosis. The water displacement method is the gold standard for precise quantification, offering superior accuracy over the perimetric method.
Area of Science:
- Lymphedema diagnosis and management
- Medical imaging and measurement techniques
Context:
- Limb volume is infrequently measured in lymphedema patients.
- Current methods often use incorrect units (e.g., centimeters) for volume quantification.
- Early diagnosis of lymphedema is possible through limb volume measurement before clinical signs manifest.
Purpose:
- To highlight the importance of accurate limb volume measurement in lymphedema.
- To compare the reproducibility and accuracy of the water displacement and perimetric methods.
- To establish guidelines for interpreting limb volume changes in post-breast cancer surgery patients.
Summary:
- Two reproducible methods for limb volume measurement exist: water displacement (gold standard, 0.7% accuracy, 1.3% reproducibility) and perimetric method (ICC 0.99).
- Water displacement provides exact limb volume, including extremities, but requires water.
- The perimetric method approximates volume, excludes extremities, and needs computer calculations.
Impact:
- Accurate limb volume measurement enables early lymphedema detection.
- Interpreting volume changes (<100 mL, 100-250 mL, >250 mL) guides patient management post-breast cancer surgery.
- Standardized measurement protocols can improve lymphedema care and outcomes.