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Effect of body orientation and joint movement on local bioimpedance measurements Cover

Effect of body orientation and joint movement on local bioimpedance measurements

Open Access
|Oct 2024

Figures & Tables

Figure 1:

The electrode placement during the measurements.
The electrode placement during the measurements.

Figure 2:

The mean of the bioimpedance measurement results of all volunteers for the first three body postures, i.e., standing straight up, lying down in supine position, and sitting with arm down and relaxed.
The mean of the bioimpedance measurement results of all volunteers for the first three body postures, i.e., standing straight up, lying down in supine position, and sitting with arm down and relaxed.

Figure 3:

The mean of the bioimpedance measurement results of all subjects for each body posture. The 6 green legends “Sitting” refers to the measurement made after each movement (shoulder joint and shoulder arch movements), the subjects were asked to return to the starting position (Sitting and arms straight down and relaxed).
The mean of the bioimpedance measurement results of all subjects for each body posture. The 6 green legends “Sitting” refers to the measurement made after each movement (shoulder joint and shoulder arch movements), the subjects were asked to return to the starting position (Sitting and arms straight down and relaxed).

Figure 4:

The correlation coefficient between the impedance measurement result and the two skin layer thickness. Pearson correlation was performed between 8 different joint angles and shoulder arch positions and the two skin layer thicknesses.
The correlation coefficient between the impedance measurement result and the two skin layer thickness. Pearson correlation was performed between 8 different joint angles and shoulder arch positions and the two skin layer thicknesses.

Figure 5:

The correlation coefficient between the phase angle measurement result and the two skin layer thickness. Pearson correlation was performed between 8 different joint angles and shoulder arch positions and the two skin layer thicknesses.
The correlation coefficient between the phase angle measurement result and the two skin layer thickness. Pearson correlation was performed between 8 different joint angles and shoulder arch positions and the two skin layer thicknesses.

Figure 6:

The comparison between the impedance measurements of the two skin treatments. The shaded area is the 95% confidence interval, the solid line in the middle represents the mean value of each group.
The comparison between the impedance measurements of the two skin treatments. The shaded area is the 95% confidence interval, the solid line in the middle represents the mean value of each group.

Figure 7:

The comparison between the phase angle measurements of the two skin treatments. The shaded area is the 95% confidence interval, the solid line in the middle represents the mean value of each group.
The comparison between the phase angle measurements of the two skin treatments. The shaded area is the 95% confidence interval, the solid line in the middle represents the mean value of each group.

Figure 8:

The comparison between the impedance measurements of the two skin treatments. The Wilcoxon rank sum test was performed between 8 different joint angles and shoulder arch positions of the two skin treatments before the attachment of the electrode.
The comparison between the impedance measurements of the two skin treatments. The Wilcoxon rank sum test was performed between 8 different joint angles and shoulder arch positions of the two skin treatments before the attachment of the electrode.

Figure 9:

The comparison between the phase angle measurement of the two skin treatments. The Wilcoxon rank sum test was performed between 8 different body positions, joint angles, and shoulder arch positions of the two skin treatments before the attachment of the electrode. In the y-axis, the number represents: 1-Standing straight up; 2-supine; 3-sitting; 4-Arms straight forward; 5-Arms behind the back; 6-Arms straight out to the side; 7-Arms straight back; 8-Arms straight up.
The comparison between the phase angle measurement of the two skin treatments. The Wilcoxon rank sum test was performed between 8 different body positions, joint angles, and shoulder arch positions of the two skin treatments before the attachment of the electrode. In the y-axis, the number represents: 1-Standing straight up; 2-supine; 3-sitting; 4-Arms straight forward; 5-Arms behind the back; 6-Arms straight out to the side; 7-Arms straight back; 8-Arms straight up.

Protocol of body orientation, shoulder joint and shoulder arch movement for bioimpedance measurement_

NumberBody orientation, shoulder joint and shoulder arch movement
1Standing straight up position
2Supine position
3Sitting and arms straight down and relaxed - starting position (arms straight down)
4Arms straight forward (90° shoulder flexion)
5Starting position (arms straight down)
6Arms behind the back (slight extension in shoulder joints)
7Starting position (arms straight down)
8Arms straight out to the side (90° abduction in the shoulder joint)
9Starting position (arms straight down)
10Arms straight back (full extension in shoulder joint, retraction in shoulder arch)
11Starting position (arms straight down)
12Arms straight up (180° shoulder flexion)
13Starting position (arms straight down)

Thickness of the two distinguished layers of skin on the right shoulder tissue which were examined using the ultrasound machine for the 10 volunteers_ Layer 1 is epidermis and dermis and layer 2 is hypodermics/subcutaneous tissue_

Participant12345678910
Layer 1 (cm)0.200.250.250.150.150.150.200.100.200.25
Layer 2 (cm)0.150.270.150.500.350.700.750.400.150.25
Language: English
Page range: 137 - 144
Submitted on: Aug 20, 2024
Published on: Oct 5, 2024
Published by: University of Oslo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2024 Sisay Mebre Abie, Alejandro Ortega de Román, Jie Hou, published by University of Oslo
This work is licensed under the Creative Commons Attribution 4.0 License.