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

Leslie D. Montgomery
Leslie D. Montgomery
, 
Richard W. Montgomery
Richard W. Montgomery
, 
Wayne A. Gerth
Wayne A. Gerth
, 
Marty Loughry
Marty Loughry
, 
Susie Q. Lew
Susie Q. Lew
 et 
Manuel T. Velasquez
Manuel T. Velasquez
   | 03 juil. 2017
Journal of Electrical Bioimpedance's Cover Image
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Article Category: Articles
Publié en ligne: 03 juil. 2017
Pages: 40 - 53
Reçu: 14 févr. 2017
DOI: https://doi.org/10.5617/jeb.4443
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© 2017 Leslie D. Montgomery, Richard W. Montgomery, Wayne A. Gerth, Marty Loughry, Susie Q. Lew and Manuel T. Velasquez, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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
eISSN:
1891-5469
Langue:
Anglais
Périodicité:
Volume Open
Sujets de la revue:
Engineering, Bioengineering and Biomedical Engineering, Biomedical Electronics, Life Sciences, Biophysics, Medicine, Biomedical Engineering, Physics, Spectroscopy and Metrology
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