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COMPARATIVE STUDY OF A NOVEL MOBILE ACOUSTIC UROFLOWMETRY APPLICATION AND CONVENTIONAL UROFLOWMETRY IN CHILDREN |
| Urology, Asan Medical Center, University of Ulsan College of Medicine, Division of Pediatric Urology, Department of Surgery, Texas Children's Hospital/Scott Department of Urology at Baylor College of Medicine, Houston, TX, Division of Pediatric Urology, Department of Surgery, Texas Children's Hospital/Scott Department of Urology at Baylor College of Medicine, Houston, TX, Division of Pediatric Urology, Department of Surgery, Texas Children's Hospital/Scott Department of Urology at Baylor College of Medicine, Houston, TX, Division of Pediatric Urology, Department of Surgery, Texas Children's Hospital/Scott Department of Urology at Baylor College of Medicine, Houston, TX, Division of Pediatric Urology, Department of Surgery, Texas Children's Hospital/Scott Department of Urology at Baylor College of Medicine, Houston, TX, Division of Pediatric Urology, Department of Surgery, Texas Children's Hospital/Scott Department of Urology at Baylor College of Medicine, Houston, TX, Division of Pediatric Urology, Department of Surgery, Texas Children's Hospital/Scott Department of Urology at Baylor College of Medicine, Houston, TX, Division of Pediatric Urology, Department of Surgery, Texas Children's Hospital/Scott Department of Urology at Baylor College of Medicine, Houston, TX |
| Sang Hoon Song, Jordon King, Kara C. Toman, Il-Hwan Kim, Jonathan Gerber, Vinaya Bhatia, Imelda Salcedo, Paul F. Austin, Chester J. Koh |
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Background: The standard uroflowmetry requires a patient to arrive with a fairly full bladder; however, some patients fail to hold their bladder last minute before the test and are unable to perform the test. Therefore, it would be more convenient to find another testing methodology replaceable to the conventional uroflowmetry. Although a few acoustic uroflowmetry systems were developed previously, the correlation of voided volume and flow rate between the acoustic uroflowmetry and the conventional uroflowmetry was reported to be suboptimal. / Objectives: The aim of this study is to assess the performance of a new mobile acoustic uroflowmetry application that can be used at home without cumbersome equipment with comparison to conventional uroflowmetry in the pediatric population. / Materials and Methods: A novel mobile acoustic uroflowmetry application represents a non-invasive method to estimate the urine flow by recording the voiding sounds with a smart phone. After institutional review board approval, male pediatric patients who were prescribed uroflowmetry testing were prospectively recruited and the voiding sound was recorded during standard uroflowmetry measurements. The urine flow rate was calculated as the voiding sound was recorded and processed. Cases with voided volume <20mL or with recording problems, were excluded. Pearson’s correlation coefficient (PCC, r) was used to compare the maximal flow rate (Qmax), average flow rate (Qavg), voiding time (VT) and voided volume (VV) estimated by the standard uroflowmetry with those calculated via acoustic uroflowmetry. / Results and Conclusion: A total of 11 male patients were analyzed. Median age was 8 years (4–18). An excellent correlation was observed between the two methods for Qmax (r = 0.798, p = 0.006), VT (r = 0.704, p = 0.023) and VV (r = 0.902, p < 0.001 ) but not for Qavg (r = 0.503, p = 0.138) (Figure 1). Flow patterns recorded by acoustic uroflowmetry and conventional uroflowmetry showed a good visual correlation. (Figure 2). Median Qmax, Qavg, flow time and voided volume were 20.1 (8.1-27.2) mL/s, 11.2 (5.5-14.5) mL/s, 12.5 (9.3-44.6) sec, 137.1 (62.6-247.1) mL, respectively. In conclusion, this study shows that acoustic uroflowmetry is comparable to standard uroflowmetry with a good correlation in male pediatric patients. Further validation study on its performance in different toilet settings is necessary for broader use. |
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keywords : uroflowmetry; mobile application; sound |
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