Slider

By accepting you will be accessing a service provided by a third-party external to https://www.storzmedical.com/

Katz JE. et al., 2019: The Basic Physics of Waves, Soundwaves, and Shockwaves for Erectile Dysfunction

Katz JE, Clavijo RI, Rizk P, Ramasamy R.
Department of Urology, University of Miami, Miami, FL, USA.
Department of Urology, University of California at Davis, Davis, CA, USA.
Department of Urology, University of Miami, Miami, FL, USA.

Abstract

INTRODUCTION:
Over the past decade, low-intensity extracorporeal shockwave therapy (Li-ESWT) has emerged as a treatment modality for erectile dysfunction (ED). To better appreciate the differences between the various devices for the treatment of ED, it is imperative for physicians to understand the underlying physics of the different shockwave generators.

AIM:
In this article, we explain the physics of shockwaves by establishing a foundation regarding the basics of waves, specifically soundwaves. We also describe the different shockwave generators available and assess their potential clinical utility.

METHODS:
We reviewed basic principles of wave propagation, randomized controlled trials investigating Li-ESWT for ED and other medical diseases, and individual industry shockwave generator websites, in order to describe the basic physics underlying Li-ESWT.

MAIN OUTCOME MEASURE:
We primarily aimed to describe the physics underlying shockwave generators and to provide a framework for understanding the relevant subtypes and adjustable parameters.

RESULTS:
A wave is a disturbance in a medium that transports energy without permanently transporting matter. In shockwaves, a soundwave is generated with a speed faster than the local speed of sound. Shockwaves are classically generated by three different types of energy sources: electrohydraulic, electromagnetic, or piezoelectric, which all create a shockwave through the conversion of electric potential energy to mechanical energy. Importantly, radial pressure waves do not behave the same as conventional shockwaves and are more like "ordinary" sound waves in that they achieve a significantly lower peak pressure, a slower rise time, and propagate outwards without a focal point.

CLINICAL IMPLICATIONS:
Li-ESWT is not currently approved by the U.S. Food and Drug Administration and is considered investigational in the United States. However, it is currently available to patients under clinical trial protocols and it is important to understand the basic physics of shockwaves to understand the differences between the different shockwave devices.

STRENGTH & LIMITATIONS:
This is a comprehensive review of the physics underlying Li-ESWT but only tangentially explores the biological impact of shockwaves.

CONCLUSION:
Physicians currently using or those contemplating purchasing a Li-ESWT device should understand the basic physics underlying the device, as well as which treatment protocols were used to demonstrate clinical efficacy in treating ED. Katz JE, Clavijo RI, Rizk P, et al. The Basic Physics of Waves, Soundwaves, and Shockwaves for Erectile Dysfunction. Sex Med Rev 2020;8:100-105.
Sex Med Rev. 2020 Jan;8(1):100-105. doi: 10.1016/j.sxmr.2019.09.004. Epub 2019 Nov 14.

0
 

Comments 1

Hans-Göran Tiselius on Thursday, February 27 2020 08:25

This is an educational article on physics of shockwaves delivered by devices aiming at treatment of erectile dysfunction. Different Li-ESWT devices are described together with the treatment protocols that have been applied. The treatment protocol for Storz Duolith comprises 3000 sw/week for 5 weeks; energy 0.15 J/mm2.
The authors finally emphasize that radial shockwave devices are entirely different form other shockwave machines.

This is an educational article on physics of shockwaves delivered by devices aiming at treatment of erectile dysfunction. Different Li-ESWT devices are described together with the treatment protocols that have been applied. The treatment protocol for Storz Duolith comprises 3000 sw/week for 5 weeks; energy 0.15 J/mm2. The authors finally emphasize that radial shockwave devices are entirely different form other shockwave machines.
Guest
Friday, July 10 2020
STORZ MEDICAL AG
Lohstampfestrasse 8
8274 Tägerwilen
Switzerland
Tel.: +41 (0)71 677 45 45
Fax: +41 (0)71 677 45 05

www.storzmedical.com