A Prototyping of Penile Tumescence Continuous Observation Device

Abstract

In this study, we attempted to develop a wireless real-time continuous observation device for penile tumescence and/or stiffness for veri cation of nocturnal penile tumescence (NPT) and for diagnosis and classi cation of erectile dysfunction (ED). Unlike conventional mechanically wired method, the patient is not constrained by the device and is able to use the device by himself in his own living environment. A soft silicone ring that ts the penis is equipped with a built-in variable inductance, variable frequency oscillator and a onetime use micro-battery. The inductance (hence oscillating frequency) is responsible for the internal stress of the ring, which represents the tumescence and/or stiffness. A non-contact leakage ux coupled to the variable inductor allows proximity telemetry of the phenomenon overnight, or up to the battery life. Our prototype device was successfull in a feasibility test using a desktop model and in a simulated ex vivo test. Now, preparation for pre-clinical trial in healthy volunteer(s) is underway.

A comprehensive review of monitoring methods for erectile dysfunction diagnosis

“…(D) The room temperature vulcanizing (RTV) soft silicon ring with oscillator circuit board and battery moulded in the ring with a background of 1 cm/1 mm grid paper. Reproduced with permission from ref 65 . Copyright 2020, Advanced Biomedical Engineering.…”

“…In their pursuit of creating a wireless and continuous monitoring device, Matsumoto et al developed a wearable system consisting of a flexible silicon ring (Figure 2D). 65 The innovative system is constructed using RTV (room temperature vulcanizing) soft silicone gel and incorporates components such as a variable inductance, variable frequency oscillator and a disposable micro‐battery. The primary parameter under measurement is penile circumferences, which is represented by the lateral tension applied to the soft silicon ring.…”

Wearable Soft Microtube Sensors for Quantitative Home-Based Erectile Dysfunction Monitoring

“…There have been several attempts to develop a real-time ED diagnosis device that can be privately operated in the comfort of the patient home [ 14 ]. Similarly, for the diagnostic evaluation of ED, there are attempts to investigate using different diagnostic methods such as Doppler ultrasonography and shear wave elastography to better evaluate ED or penile rigidity instead of using the traditional RigiScan ® device [ 15 , 16 ].…”