Effect of the injection and measurement patterns and the geometric distribution of electrodes in bladder volume estimation using electrical impedance tomography

Sánchez, Juan David Muñoz; Leyton, Víctor Hugo Mosquera; Rodas, Carlos Felipe Rengifo

doi:10.1109/stsiva53688.2021.9591669

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…Specifically, ultrasound waves can penetrate the bladder wall, and the bladder wall can reflect ultrasound waves. When estimating bladder volume, we approximate the bladder as a sphere [ 33 , 34 ]. The ultrasound probe is positioned directly above the bladder.…”

Section: The “Three-point Localization” Methodsmentioning

confidence: 99%

A Novel Three-Point Localization Method for Bladder Volume Estimation

Yuan,

Shen,

Zhang

et al. 2024

Sensors

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The measurement of bladder volume is crucial for the diagnosis and treatment of urinary system diseases. Ultrasound imaging, with its non-invasive, radiation-free, and repeatable scanning capabilities, has become the preferred method for measuring residual urine volume. Nevertheless, it still faces some challenges, including complex imaging methods leading to longer measurement times and lower spatial resolution. Here, we propose a novel three-point localization method that does not require ultrasound imaging to calculate bladder volume. A corresponding triple-element ultrasound probe has been designed based on this method, enabling the ultrasound probe to transmit and receive ultrasound waves in three directions. Furthermore, we utilize the Hilbert Transform algorithm to extract the envelope of the ultrasound signal to enhance the efficiency of bladder volume measurements. The experiment indicates that bladder volume estimation can be completed within 5 s, with a relative error rate of less than 15%. These results demonstrate that this novel three-point localization method offers an effective approach for bladder volume measurement in patients with urological conditions.

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Section: The “Three-point Localization” Methodsmentioning

confidence: 99%

A Novel Three-Point Localization Method for Bladder Volume Estimation

Yuan,

Shen,

Zhang

et al. 2024

Sensors

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“…A ring of 8 electrodes was used to simulate current injection and the measurement of potentials. A previous work [20] shows details of this experiment.…”

Section: Simulation Experimentsmentioning

confidence: 99%

A modified voltage changes ratio (MVCR) for in-vitro volume estimation

Leyton

Rodas

2022

Rev.Fac.Ing.Univ.Antioquia

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Electrical bioimpedance (EBI) is a non-invasive technique for monitoring bladder volume. The EBI approaches global impedance (GI), impedance ratio method (IRM), and voltage change ratio (VCR) have been successfully applied to detect changes in the volume of objects with constant but unknown conductivity. In this work, simulated and in-vitro experiments are used to compare the performance of these methods with respect to a new approach proposed by some authors and called modified VCR (MVCR). Experimental results indicated that GI, VCR, and MVCR indices increase when the volume of the object under study increases. On the other hand, no direct or inverse relationship between IRM and volume was observed. The coefficient of variation, defined as the interquartile range divided by the median of a set of measurements, was lower for MVCR, which indicates that the proposed approach is less sensitive to measurement noise than the other three methods.

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Effect of the injection and measurement patterns and the geometric distribution of electrodes in bladder volume estimation using electrical impedance tomography

Cited by 2 publications

References 25 publications

A Novel Three-Point Localization Method for Bladder Volume Estimation

A Novel Three-Point Localization Method for Bladder Volume Estimation

A modified voltage changes ratio (MVCR) for in-vitro volume estimation

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