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A portable band-shaped bioimpedance system to monitor the body fat and fasting glucose level

Luong Duong Trong
Luong Duong Trong
, 
Linh Nguyen Quang
Linh Nguyen Quang
, 
Duc Hoang Anh
Duc Hoang Anh
, 
Diep Dang Tuan
Diep Dang Tuan
, 
Hieu Nguyen Chi
Hieu Nguyen Chi
 und 
Duc Nguyen Minh
Duc Nguyen Minh
   | 04. Nov. 2022
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Online veröffentlicht: 04. Nov. 2022
Seitenbereich: 54 - 65
Eingereicht: 29. Juli 2022
DOI: https://doi.org/10.2478/joeb-2022-0009
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© 2022 Luong Duong Trong, Linh Nguyen Quang, Duc Hoang Anh, Diep Dang Tuan, Hieu Nguyen Chi and Duc Nguyen Minh, published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Fig. 1

The overall architecture of the system.
The overall architecture of the system.

Fig. 2

The band prototype of 150mm x 40mm in dimension and the distances between.
The band prototype of 150mm x 40mm in dimension and the distances between.

Fig. 3

The schematic of the current source and voltage recording on the band
The schematic of the current source and voltage recording on the band

Fig. 4

Flowchart of the signal processing
Flowchart of the signal processing

Fig. 5

Four locations were picked for the local impedance measurement: on the upper arm under the triceps, on the side of the belly, on the side of the back and on the thigh under the bicep femoris
Four locations were picked for the local impedance measurement: on the upper arm under the triceps, on the side of the belly, on the side of the back and on the thigh under the bicep femoris

Fig. 6

Results between the impedance measured by the band and the standard resistors
Results between the impedance measured by the band and the standard resistors

Fig. 7

Local impedance versus body fat at 4 locations: A) upper arm, B) belly, C) back, and D) thigh.
Local impedance versus body fat at 4 locations: A) upper arm, B) belly, C) back, and D) thigh.

Fig. 8

Local impedance versus fasting glucose level at 4 locations: A) upper arm, B) belly, C) back, and D) thigh.
Local impedance versus fasting glucose level at 4 locations: A) upper arm, B) belly, C) back, and D) thigh.

The information of volunteers in the experiment including age, BME, body fat (%) and fasting glucose

Age BMI Body fat (%) Fasting glucose (mmol/l)
mean ± 31.9 ± 22.1 ± 20.7 ± 6.9 7.4 ±
std 6.6 3.5 1.8
min 18 17.3 6.2 4.9
max 44 27.6 33.1 10.9

Correlation coefficients and the corresponding confidence intervals (95%) between the local impedances measured at 4 locations: the upper arm, the belly, the back and the thigh, and the two parameters: the body fat and fasting glucose of all 21 volunteers. The best results are highlighted in boldness and red. Abbreviation: Cor. Coef: correlation coefficient. CI: confidence interval (95%)

Arm Belly Back Thigh
Cor. Coef.* CI** Cor. Coef.* CI** Cor. Coef.* CI** Cor. Coef.* CI**
Body fat 0.89 0.73-0.95 0.69 0.36-0.86 0.51 0.09-0.77 0.57 0.13-0.82
Fasting Glucose 0.42 -0.02-0.72 0.32 -0.14-0.65 0.14 -0.31-0.54 0.92 0.81-0.97
eISSN:
1891-5469
Sprache:
Englisch
Zeitrahmen der Veröffentlichung:
Volume Open
Fachgebiete der Zeitschrift:
Technik, Bioingenieurwesen, Biomedizinische Elektronik, Biologie, Biophysik, Medizin, Biomedizinische Technik, Physik, Spektroskopie und Metrologie
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