Valitrack study: Objective evaluation of medical compression wearing time and patient activity with the Accutrack by Sigvaris Group sensor.

Introduction: Objective measurement of compliance is mandatory to evaluate therapeutic effects and clinical benefits of medical compression stockings. This Valitrack study evaluates the Accutrack sensor equipped with an accelerometer. The evaluation is done under controlled and free conditions and during washing.

Comparison between bioelectrical impedance spectroscopy measurements and water volume displacement of ankle oedema variations during the course of a day.

Objective: The purpose of this study was to find relationships between variations in bioelectrical impedance spectroscopy (BIS) measurements and those obtained by water displacement (WD) and calf (C) and ankle (A) perimetry on legs of patients with venous insufficiency and lower limb oedema, some with positive pitting test (PPT), others with negative pitting test (NPT).

Approach: Twenty-nine (29) female subjects were clinically examined prior to inclusion in the trial. Measurements were taken once in the morning and then 6 h later, using perimetry, WD, and then BIS; subjects were standing.

Ambulatory sensor for circumference monitoring of lower limbs.

The continuous monitoring of edema in the lower limbs of the human body is presently not possible as suitable devices are not available. This paper presents the characterization and the testing of a novel ambulatory device dedicated to the monitoring of circumference variations in the lower limb. The sensor, based on an inductive loop integrated into a textile band, is connected to a miniaturized electronic system which wirelessly sends the calculated perimeter value of the leg to a smart mobile device.

ActimedARM - design of a wearable system to monitor daily actimetry.

We developed a low power kinematic sensor, ActimedARM, incorporating three-axis accelerometer and magnetometer, a microcontroller ARM3, a ZigBee wireless communication and μSD memory storage. With embedded algorithms it can detect in real time the postures of the subject. A preliminary assessment conducted on 12 subjects reached a 97% correct classification rate.

Local effect of compression stockings on skin microcirculatory activity through the measurement of skin effective thermal conductivity.

This paper presents a preliminary study to demonstrate the instantaneous local effect of compression stocking (Class 2) on skin microcirculatory activity. The measurement needs to be carefully performed as the sensor is placed under the garment. To assess the local effect of compression stockings, we use the ambulatory device Hematron located on the calf under the garment.

Introducing knowledge of wearing compression stockings on the skin blood flow by using microHematron device.

The aim of this preliminary study was to review the actual state of knowledge concerning the mechanisms underlying compression medical stockings action on the skin blood flow (SBF) in capillaries. SBF was assessed by measuring the thermal conductivity of living-tissues using microHematron ambulatory device. The investigation was performed for different postures using three standard French classes (10-15 mmHg, 15-20 mmHg and 20-36 mmHg) of Medical compression stockings (MCS) on six healthy subjects without chronic venous insufficiency.