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Continuous body impedance measurement to detect bladder volume changes during urodynamic study: A prospective study in pediatric patients

Authors
 Sangyeop Lee  ;  Junhyung Moon  ;  Seung-Chul Shin  ;  Ji Hye Hwang  ;  Kyoungwoo Lee  ;  Yong Seung Lee 
Citation
 NEUROUROLOGY AND URODYNAMICS, Vol.40(1) : 421-427, 2021-01 
Journal Title
NEUROUROLOGY AND URODYNAMICS
ISSN
 0733-2467 
Issue Date
2021-01
MeSH
Child ; Child, Preschool ; Electric Impedance / therapeutic use* ; Female ; Humans ; Male ; Prospective Studies ; Urinary Bladder, Neurogenic / physiopathology ; Urinary Bladder, Neurogenic / therapy* ; Urodynamics / physiology*
Keywords
bladder ; electric impedance ; neurogenic ; urinary bladder ; urodynamics
Abstract
Aims: To assess the possibility of the body impedance (BI) reflecting bladder volumes (BV) in pediatric patients, the BI signals are measured continuously with the equipment that we have developed and reported previously, during the filling phase of urodynamic study (UDS).

Methods: A total of 30 children (5-12 years old) are included in this prospective study. The equipment uses two dry electrodes embedded inside a strap to collect impedance and electrocardiogram signals. The factors affecting baseline BI and its decreases during UDS have been investigated.

Results: The median age is 6.1 years and BI is accurately measured in 27 out of 30 patients (90.0% accuracy). The median value of baseline BI is 1958 Ω. It is higher when they are older, equal to or taller than 125 cm, or non-neurogenic bladder patients. BI decreases as the bladder is filled with saline in 21 patients (77.8%), and remains constant in 6 patients (22.2%). The median age of the Decreased Group is significantly higher than that of Nondecreased Group (p = .036). Height of 125 cm or more is significant in the Decreased Group (p = .020). Heart rates also have been simultaneously measured and revealed a mild decrease during the filling phase.

Conclusions: The baseline BI is affected by the height and age of the children. BI is effectively measured and reflects a change in the BV in older children who are taller than 125 cm, with a small device using a smartphone and a strap.
Full Text
https://onlinelibrary.wiley.com/doi/10.1002/nau.24577
DOI
10.1002/nau.24577
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Urology (비뇨의학교실) > 1. Journal Papers
Yonsei Authors
Lee, Yong Seung(이용승) ORCID logo https://orcid.org/0000-0003-3778-9888
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/186814
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