A new device to aid clinicians in measuring changes in the extracellular fluid levels of the arms in women:
What is an L-Dex Measurement?
The lymphedema index (L-Dex) is a measurement system used to aid in the clinical assessment of unilateral lymphedema
of the arm and leg (swelling occurring in only one limb) in women and of the leg in men.
ImpediMed L-Dex devices are the first FDA-cleared medical devices using bioimpedance spectroscopy for this application. They have been developed
to aid your doctor to clinically assess for lymphedema by measuring extracellular fluid differences in the arms or legs of women and in the legs of men.
The devices produce a lymphedema index (or L-Dex) value that can help determine if you are building up excess extracellular fluid in your
at-risk limb. The test takes only minutes to perform. It is painless and gives an immediate result.
Why Have an L-Dex Measurement?
- L-Dex measurements are a quick and non-invasive method for aiding in the clinical assessment of lymphedema of the arm and leg in women and the leg in men.
- L-Dex measurements can help your healthcare professional accurately measure extracellular fluid differences of the limbs at all stages of lymphedema.
- L-Dex measurements made each time you see your healthcare professional can help them:
- –Better aid them in clinically assessing for lymphedema in the arms and legs of women and the legs of men.
- –Demonstrate extracellular fluid level differences (if present).
Tracking L-Dex History Over Time.
How are L-Dex Measurements Taken?
L-Dex measurements are made by passing a harmless electrical signal of very low
strength from the L-Dex device through your limb. Both limbs are measured and the
whole procedure takes only minutes to complete.
Patient being assessed using a SOZO® device
How Does it Work?
The electrical signal travels through the fluid surrounding the cells which make up the muscle and tissue of the limb. The amount of this fluid increases as lymphedema develops. Increased fluid means the electrical signal will travel more easily through the limb. An L-Dex device compares how easily the electrical signal travels in the unaffected versus the affected (or at-risk) limbs and generates an L-Dex value from this comparison.
What Does an L-Dex Value Mean?
The L-Dex value indicates the difference in the amount of extracellular fluid in the unaffected limb versus the affected limb.
L-Dex values are displayed against a matched “healthy” group (see diagram below) as an aid in a clinician’s assessment.
L-Dex values that have changed 10 units from baseline may be indicative of relavent changes in the extracellular fluid levels to aid in a clinician’s assessment.
The range of L-Dex values.
*Note: L-Dex values that lie outside the normal range may indicate the early signs of lymphedema and values that have changed +10 L-Dex units from baseline may also indicate early lymphedema. The L-Dex scale is a tool to assist in the clinical assessment of lymphedema by a medical provider.
How Does L-Dex Help You?
The L-Dex system can be used by a medical provider as a series of measurements over time. This allows the healthcare professional to:
• Assess extracellular fluid changes associated with lymphedema and therefore aid a clinician in considering therapy.
• Measure extracellular fluid change with therapy in patients for those who already have lymphedema.
_______A hypothetical example of tracking one patient’s L-Dex
What’s The Clinical Research?
Clinical research validating the use of our products is abundant.
Read all about it here at ImpediMed.com