Ambulatory sensor for the monitoring of the edema circumference in lower limbs

Ambulatory sensor for the monitoring of the edema circumference in lower limbs

•A sensor integrated in a textile for the leg circumference monitoring.•The inductive loop self-inductance is predicted thanks to recent computational method.•The size of the electronic circuit fits the requirements of wearable sensors.•The measured perimeters range from 25 cm to 33 cm with an accur...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. A. Physical. Vol. 272; pp. 83 - 91
Main Authors: Gehin, C., Grenier, E., Chaigneau, C., Reinaudo, J., Claude, A., Massot, B., Montalibet, A., McAdams, E.T.
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 01-04-2018
Elsevier BV
Elsevier
Subjects:
Ambulatory care
Ambulatory monitoring
Circuits
Edema
Edema monitoring
Electronic circuits
Engineering Sciences
Extreme values
Human body
Inductance
Limbs
Measurement
Monitoring
Non-invasive sensor
Portable equipment
PSoC
Reproducibility
Smart textile
Studies
PSoC
Non-invasive sensor
Edema monitoring
Ambulatory monitoring
Smart textile
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•A sensor integrated in a textile for the leg circumference monitoring.•The inductive loop self-inductance is predicted thanks to recent computational method.•The size of the electronic circuit fits the requirements of wearable sensors.•The measured perimeters range from 25 cm to 33 cm with an accuracy of 0.3 cm. The monitoring of geometrical variations in segments of the human body is currently not widely used due to the lack of suitable devices. For lower limbs, for example, a simple measuring tape is generally used to periodically measure key dimensions. This measurement approach, and the associated lack of reproducibility, is not compatible with ambulatory monitoring and it is further recognized that precise, standardized reference points are required for the more meaningful monitoring of the lower leg. The paper presents the design and realization of a new sensor system dedicated to the measurement of geometrical variations in the lower limbs, enabling the ambulatory monitoring of leg edemic swelling during daily activity. The sensor is based on an inductive loop directly integrated into a textile band and connected to a miniaturized electronic system which sends, via wireless transmission, the perimeter value of the leg (assuming that its shape is circular) to a laptop and in the near future, to a mobile phone. The inductive loop has been modeled using Matlab to predict the inductance value and determine the necessary parameters of the electronic circuit. The portable, ambulatory device enables the measurement of perimeters ranging from 25 cm to 33 cm, with an accuracy of 0.3 cm. Stability of the sensor over the time is very good (3.4% of the full scale). Hysteresis occurs when the textile is stretched between two extreme values which can be minimized by regular calibration of the system. The presented results are significantly better than those currently obtained using the traditional measuring tape.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2018.01.036