Wireless intravesical device for real-time bladder pressure measurement: Study of consecutive voiding in awake minipigs


Autoři: Mohammad Ayodhia Soebadi aff001;  Marko Bakula aff004;  Lukman Hakim aff002;  Robert Puers aff004;  Dirk De Ridder aff001
Působiště autorů: Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Belgium aff001;  Department of Urology, Faculty of Medicine, Dr Soetomo General Academic Hospital, Universitas Airlangga, Surabaya, Indonesia aff002;  Department of Urology, Universitas Airlangga Hospital, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia aff003;  ESAT-MICAS, KU Leuven, Belgium aff004
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0225821

Souhrn

Traditional urodynamics have poor correlation with urological symptoms. Ambulatory urodynamics may improve this correlation but the need for a transurethral catheter and the time-consuming nature of this examination limits its use. Therefore, the objective of this study was to develop a wireless real-time bladder pressure measurement device for repeated and prolonged-term measurement of bladder behavior in awake pigs. The Bladder Pill is an intravesical device with a pressure microsensor and a 3-dimensional inductive coupling coil for energy supply. A corresponding external coil provides wireless power transmission and real-time communication of bladder pressure data. To test the correlation between the pressure data measured by the device and by standard methods, we compared static water column pressures with this device and water-filled urodynamic catheter systems. In vivo assessment of awake voiding by the pill was done by introducing the bladder pill into the bladder of Göttingen minipigs. An air-charged urodynamic catheter was introduced transurethrally as control for pressure measurements. The optimal physical configuration of the pill was investigated to maximize the containment in the bladder. We used two versions of external signal receivers (one waistband and one rectangular frame) to test the optimal external signal capture. Next to that, we performed short-term and medium-term comparative pressure studies. The in vitro static pressure measurement demonstrated a mean difference of less than 1 cm H2O between the methods. The optimal design of the pill for maximal retainment in the bladder proved to be a pigtail configuration. The bending of the device during bladder contractions caused offset of 2.7 +/- 1.4 cm H2O (mean +/- SD) on the pressure measurements. The rectangular frame performed signal capture during 5 consecutive voids with a good correlation of the pressure measurements. The device can be inserted through the urethra and is retrieved using string or endoscopic extraction. In conclusion, wireless long-term measurement of bladder pressure is demonstrated and yields comparable results to current available catheter methods of measurement in a pig model.

Klíčová slova:

Bladder – Catheters – Communication equipment – Measurement equipment – Medical devices and equipment – Medical implants – Urine – Urodynamics


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2019 Číslo 12