Montreal electronic artificial urinary sphincters: Our futuristic alternatives to the AMS800™

  • Xavier Biardeau Jewish General Hospital,McGill University
  • Sami Hached École Polytechnique de Montréal
  • Oleg Loutochin Jewish General Hospital,McGill University
  • Lysanne Campeau Jewish General Hospital,McGill University
  • Mohamad Sawan École Polytechnique de Montréal
  • Jacques Corcos Jewish General Hospital,McGill University

Abstract

Introduction: We aimed to present three novel remotely controlled hydromechanical artificial urinary sphincters (AUSs) and report their in-vitro and ex-vivo results.

Methods: We successively developed three distinct hydromechanical AUSs on the basis of the existing AMS800™ device by incorporating an electronic pump. No changes were made to the cuff and balloon. The AUS#1 was designed as an electromagnetically controlled device. The AUS#2 and AUS#3 were conceived as Bluetooth 2.1 remotely controlled and Bluetooth 4.0 remotelycontrolled, adaptive devices, respectively. In-vitro experiments profiled occlusive cuff pressure (OCP) during a complete device cycle, with different predetermined OCP. Ex-vivo experiments were performed on a fresh pig bladder with 4 cm cuff placed around the urethra. Leak point pressure with different predetermined OCP values was successively measured during cystometry via a catheter at the bladder dome.

Results: Our in-vitro and ex-vivo experiments demonstrated that these three novel AUSs provided stable and predetermined OCP — within the physiological range — and completely deflated the cuff, when required, in a limited time compatible with physiological voiding cycles.

Conclusions: Our three novel, remotely controlled AUSs showed promising results that should be confirmed by in-vivo experiments focusing on efficacy and safety.

Published
2017-10-12
How to Cite
Biardeau, X., Hached, S., Loutochin, O., Campeau, L., Sawan, M., & Corcos, J. (2017). Montreal electronic artificial urinary sphincters: Our futuristic alternatives to the AMS800™. Canadian Urological Association Journal, 11(10), E396-404. https://doi.org/10.5489/cuaj.4493
Section
Original Research