Rafael Edgardo Maldonado-Valadez1, Erika Beatriz Falcón-Sandoval1,2, Francisco Miguel Vargas-Luna2, Svetlana Kashina2, José Marco Balleza-Ordaz3. 1. Urology Department, Hospital Regional de Alta Especialidad del Bajío (HRAEB), San Carlos la Roncha, 37660, León, Guanajuato, México. 2. Department of Medical Physics, University of Guanajuato, Lomas del Bosque #103, Lomas del Campestre, 37150, León, Guanajuato, México. 3. Department of Medical Physics, University of Guanajuato, Lomas del Bosque #103, Lomas del Campestre, 37150, León, Guanajuato, México. jm.balleza@ugto.mx.
Abstract
PURPOSE: Detrusor pressure-volume relationship evaluation by urodynamics provides useful clinical information; however, it is invasive, and requires specific installations. An alternative technique proposed by our research group is the electrical bioimpedance (BI) which is an easily performed and non-invasive method. In this work, we assess the relationship between BI and detrusor bladder pressure in adults with neurogenic lower urinary tract dysfunction. METHODS: A prospective observational study was conducted. 20 patients (11 females and 9 male) previously diagnosed with neurogenic bladder were included. All participants underwent simultaneously a urodynamic evaluation (UDS) and BI determination, and both examination signals were recorded and subjected to Shapiro-Wilks statistical test. A correlational statistical test was used to compare the pressure parameters (detrusor, vesical and abdominal) with their respective BI determinations. Subsequently, a linear regression test was performed to evaluate the concordance between BI and their respective pressure values. RESULTS: From the 20 correlations, between detrusor bladder pressure (PDET) and abdominal bioimpedance determinations (ZABD), obtained for all participants, 16 evidenced significant results over 90% (p < 0.05). CONCLUSIONS: A significantly high correlation between abdominal bioimpedance determinations and the detrusor bladder pressures was evidenced. These results should be confirmed in a larger group of participants.
PURPOSE: Detrusor pressure-volume relationship evaluation by urodynamics provides useful clinical information; however, it is invasive, and requires specific installations. An alternative technique proposed by our research group is the electrical bioimpedance (BI) which is an easily performed and non-invasive method. In this work, we assess the relationship between BI and detrusor bladder pressure in adults with neurogenic lower urinary tract dysfunction. METHODS: A prospective observational study was conducted. 20 patients (11 females and 9 male) previously diagnosed with neurogenic bladder were included. All participants underwent simultaneously a urodynamic evaluation (UDS) and BI determination, and both examination signals were recorded and subjected to Shapiro-Wilks statistical test. A correlational statistical test was used to compare the pressure parameters (detrusor, vesical and abdominal) with their respective BI determinations. Subsequently, a linear regression test was performed to evaluate the concordance between BI and their respective pressure values. RESULTS: From the 20 correlations, between detrusor bladder pressure (PDET) and abdominal bioimpedance determinations (ZABD), obtained for all participants, 16 evidenced significant results over 90% (p < 0.05). CONCLUSIONS: A significantly high correlation between abdominal bioimpedance determinations and the detrusor bladder pressures was evidenced. These results should be confirmed in a larger group of participants.