Have a personal or library account? Click to login
A system to monitor segmental intracellular, interstitial, and intravascular volume and circulatory changes during acute hemodialysis Cover

A system to monitor segmental intracellular, interstitial, and intravascular volume and circulatory changes during acute hemodialysis

Journal of Electrical Bioimpedance
Volume 8 (2017): Issue 1 (January 2017)
By: Leslie D. Montgomery,  Richard W. Montgomery,  Wayne A. Gerth,  Marty Loughry,  Susie Q. Lew and  Manuel T. Velasquez  
Open Access
|Jul 2017

Figures & Tables

Figure 1

General equivalent circuit model of current conduction through tissue.
General equivalent circuit model of current conduction through tissue.

Figure 2A

Equivalent Circuit Diagram used in EIS Analysis for Intracellular, Interstitial, and Intravascular Volumes.
Equivalent Circuit Diagram used in EIS Analysis for Intracellular, Interstitial, and Intravascular Volumes.

Figure 2B

Extra-vascular soft tissue compartment of EIS model.
Extra-vascular soft tissue compartment of EIS model.

Figure 3

Prototype Z-Spec-2 IPG/EIS system (shown with control/data recording laptop and Arc Simulator unit).
Prototype Z-Spec-2 IPG/EIS system (shown with control/data recording laptop and Arc Simulator unit).

Figure 4

Z-Spec-2 functional block diagram.
Z-Spec-2 functional block diagram.

Figure 5

Electrode placement.
Electrode placement.

Figure 6A

Linear regression and Bland Altman analyses comparing the BISHCT and CLHCT results at specified times during dialysis.
Linear regression and Bland Altman analyses comparing the BISHCT and CLHCT results at specified times during dialysis.

Figure 6B

Bland Altman analysis. The BISHCT/CLHCT points included above for each time period are represented as: 30 min. are open circles, 60 min. are solid squares, 90 min. are solid circles, 120 min. are open triangles, and the END values are open squares.
Bland Altman analysis. The BISHCT/CLHCT points included above for each time period are represented as: 30 min. are open circles, 60 min. are solid squares, 90 min. are solid circles, 120 min. are open triangles, and the END values are open squares.

Figure 7A

Individual patient intracellular volume changes during dialysis vs elapsed time.
Individual patient intracellular volume changes during dialysis vs elapsed time.

Figure 7B

Individual patient interstitial volume changes during dialysis vs elapsed time.
Individual patient interstitial volume changes during dialysis vs elapsed time.

Figure 7C

Individual patient intravascular volume changes during dialysis vs elapsed time.
Individual patient intravascular volume changes during dialysis vs elapsed time.

Figure 8A

Patient Type A's - UF rate and amount removed vs. elapsed time.
Patient Type A's - UF rate and amount removed vs. elapsed time.

Figure 8B

Patient Type B's - UF Rate an Amount Removed vs. elapsed time.
Patient Type B's - UF Rate an Amount Removed vs. elapsed time.

Figure 9A

Measured and predicted HCT values for Patient Type A vs. elapsed time.
Measured and predicted HCT values for Patient Type A vs. elapsed time.

Figure 9B

Measured and predicted HCT values for Patient Type B vs. elapsed time.
Measured and predicted HCT values for Patient Type B vs. elapsed time.

Figure 10A

Patient Type A's segmental and compartment volume changes vs. elapsed time.
Patient Type A's segmental and compartment volume changes vs. elapsed time.

Figure 10B

Patient Type B's total segmental and compartment volume changes vs. elapsed time.
Patient Type B's total segmental and compartment volume changes vs. elapsed time.

Figure 11A

Patient Type A's intravascular and extravascular volume changes vs. elapsed time.
Patient Type A's intravascular and extravascular volume changes vs. elapsed time.

Figure 11B

Patient Type B's intravascular and extravascular volume changes vs. elapsed time.
Patient Type B's intravascular and extravascular volume changes vs. elapsed time.

Figure 12A

Patient A and B's systolic blood pressure vs. elapsed time.
Patient A and B's systolic blood pressure vs. elapsed time.

Figure 12B

Patient Type A and B's diastolic blood pressure vs. elapsed time.
Patient Type A and B's diastolic blood pressure vs. elapsed time.

Figure 12C

Patient Type A and B's mean arterial blood pressure vs. elapsed time.
Patient Type A and B's mean arterial blood pressure vs. elapsed time.

Figure 13A

Patient Type A and B's heart rate vs. elapsed time.
Patient Type A and B's heart rate vs. elapsed time.

Figure 13B

Patient Type A and B’s maximum blood pulse amplitude vs. elapsed time.
Patient Type A and B’s maximum blood pulse amplitude vs. elapsed time.

Figure 13C

Patient Type A and B’s calf blood flow vs. elapsed time.
Patient Type A and B’s calf blood flow vs. elapsed time.

Figure 14A

Patient Type A and B’s pulse transit time vs. elapsed time.
Patient Type A and B’s pulse transit time vs. elapsed time.

Figure 14B

Patient Type A and B’s peripheral resistance vs. elapsed time.
Patient Type A and B’s peripheral resistance vs. elapsed time.

Figure 15

Patient Type A and B’s average blood pulse inflow angle vs. elapsed time.
Patient Type A and B’s average blood pulse inflow angle vs. elapsed time.

Figure 16A

Patient Type A and B’s arteriolar tone vs. elapsed time.
Patient Type A and B’s arteriolar tone vs. elapsed time.

Figure 16B

Patient Type A and Bs venular tone vs. elapsed time.
Patient Type A and Bs venular tone vs. elapsed time.

BIS and CritLine Hematocrit values ± SD at specified elapsed times during dialysis_

ELAPSED TIME (min)NBISHCT (%)BISHCT SDCLHCT (%)CLHCT SD
302231.914.6831.914.68
602232.144.7332.124.71
902232.364.7332.324.67
1202232.524.7132.594.68
End2233.064.9633.094.96

Differences ± SD, limits of agreement, and independent t-test probabilities of significance between BISHCT and CLHCT values at specified elapsed times during dialysis_

ELAPSED TIME (min)Difference with CLHCTLimits of agreement (mean ± 1.96SD)P (by non-pair t-test)
30-0.00692 ± 0.0318-0.0692 ± 0.07990.996
60-0.01166 ± 0.1393-0.2847 ± 0.36860.993
90- 0.03235 ± 0.2469-0.5163 ± 0.64150.982
1200.06657 ± 0.2492-0.4218 ± 0.74670.962
END0.03746 ± 0.1590-0.2742 ± 0.47150.980
DOI: https://doi.org/10.5617/jeb.4443 | Journal eISSN: 1891-5469
Journal RSS Feed
Language: English
Page range: 40 - 53
Submitted on: Feb 14, 2017
Published on: Jul 3, 2017
Published by: University of Oslo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
Bioimpedance,
plethysmograph,
spectroscopy,
compartment volumes,
blood flow
Related subjects:
Engineering,
Bioengineering and biomedical engineering,
Biomedical electronics,
Life sciences,
Biophysics,
Medicine,
Biomedical engineering,
Physics,
Spectroscopy and metrology

© 2017 Leslie D. Montgomery, Richard W. Montgomery, Wayne A. Gerth, Marty Loughry, Susie Q. Lew, Manuel T. Velasquez, published by University of Oslo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Previous articleVolume 8 (2017): Issue 1 (January 2017)Next article