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Zeitschriften
Journal of Electrical Bioimpedance
Band 11 (2020): Heft 1 (January 2020)
Uneingeschränkter Zugang
Electrode positioning to investigate the changes of the thoracic bioimpedance caused by aortic dissection – a simulation study
V. Badeli
V. Badeli
,
G. M. Melito
G. M. Melito
,
A. Reinbacher-Köstinger
A. Reinbacher-Köstinger
,
O. Bíró
O. Bíró
und
K. Ellermann
K. Ellermann
| 25. Juni 2020
Journal of Electrical Bioimpedance
Band 11 (2020): Heft 1 (January 2020)
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Online veröffentlicht:
25. Juni 2020
Seitenbereich:
38 - 48
Eingereicht:
16. März 2020
DOI:
https://doi.org/10.2478/joeb-2020-0007
Schlüsselwörter
Aortic dissection
,
impedance cardiography
,
numerical simulation
,
sensitivity analysis
© 2020 V. Badeli et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Fig. 1
a) Intimal tear in the aorta [2]. b) Aortic dissection types (Stanford system) [3].
Fig. 2
The spatial average time-dependent cross-sectional radius of the aortic arch and the descending aorta during one cardiac cycle.
Fig. 3
The spatial average time-dependent blood velocity in the aortic arch and the descending aorta.
Fig. 4
Orientation and deformation of RBCs in a blood vessel during the systole and diastole.
Fig. 5
The blood conductivity changes as a function of reduced average velocity 〈v/R〉 for different haematocrit (H) levels.
Fig. 6
Simulation model setup. a) 3D view – b) 2D bottom view.
Fig. 7
Flow disturbances around the dissection in case of an aortic dissection.
Fig. 8
Damage factor DF as a function of the radius of the false lumen.
Fig. 9
Source electrode pairs and measurement electrode pairs positions.
Fig. 10
Values of Y^n,mPCE(t) \widehat Y_{n,m}^{PCE}(t) reflecting the discrepancy between the healthy and dissected conditions for 20-time steps and all proposed electrode combinations.
Fig. 11
Maximal discrepancy Y^maxPCE \widehat Y_{max}^{PCE} for the fourth time step and each electrode configuration. Colours show source electrodes; blue: injection from A, red: injection from B, yellow: injection from C; numbers show the measurement electrodes.
Fig. 12
Sensitivity analysis on a. HC^C,4PCE(t) \widehat {HC}_{C,4}^{PCE}(t) , b. DC^C,4PCE(t) \widehat {DC}_{C,4}^{PCE}(t) , c. Y^C,4PCE(t) \widehat Y_{C,4}^{PCE}(t) .
Fig. 13
Changing of Y^maxPCE \widehat Y_{max}^{PCE} by the damage factor for injection from source electrodes C (inj C) and measurement from five electrode pairs (m1 to m5).
Fig. 14
a. HC^C,4PCE(t) \widehat {HC}_{C,4}^{PCE}(t) and DC^C,4PCE(t) \widehat {DC}_{C,4}^{PCE}(t) for different damage factors, b. Y^C,4PCE(t) \widehat Y_{C,4}^{PCE}(t) for different damage factors.
Input space description for the healthy and dissected study cases.
Cases
Variable
Distribution
Moments
Unit
Healthy
R
TL
Uniform
[1.35 1.95]
cm
θ
H
Uniform
[1.0 1.1]
-
Dissected
R
TL
Uniform
[1.35 1.95]
cm
θ
H
Uniform
[1.0 1.1]
-
R
TL
Uniform
[0.3 1.5]
cm
α
FL
Uniform
[2.9 3.65]
rad
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