Can you explain how to calculate duty cycle for an ultrasound treatment?
Answer
When we talk about pulsed ultrasound, duty cycle is one of the things that we talk about with respect to pulsing the sound. A duty cycle is on time to total time. This is one of the most common errors that people make. They often think that the duty cycle is on time to off time, but it is not. It is on time to total time. Total time is the sum of on time to off time. If I want to have a duty cycle of 25%, then I might choose to have the sound waves on for one second and off for three seconds; on one second, off three, and total time is then 4 seconds. My ratio would be 1:4; one second on, three seconds off, plus one second on give me a total time of four seconds.
Dawn T. Gulick, PT, PhD, ATC, CSCS
Dawn T. Gulick, PhD, PT, AT, CSCS, a Professor of Physical Therapy. Her areas of expertise are orthopedics, sports medicine, modalities, and medical screening. As a clinician, she has owned a private orthopedic/sports medicine practice. She also provides athletic training services from the middle school to elite Olympic/Paralympic level. As a member of the Olympic Sports Medicine Society, Dr. Gulick has provided medical coverage at numerous national and international events. As a scholar, Dr. Gulick is the author of 4 books (Ortho Notes, Screening Notes, Sport Notes, Mobilization Notes), four book chapters, > 60 peer-reviewed publications, and > 100 professional and civic presentations. OrthoNotes is in the 5th edition and has been translated into multiple languages. Dr. Gulick is an entrepreneur. She is the developer of a mobile app called iOrtho+ (Apple, Android, & desktop versions). Her app has been downloaded over 160K times around the world. She is the Founder & CEO of Therapeutic Articulations. She is the inventor of the Mobil-Aider, an orthopedic device designed to quantify joint mobility. She is the recipient of a phase I and phase II National Science Foundation grant of over $1.2M for the commercialization of the Mobil-Aider. She owns the utility patent & has achieved FDA clearance. She has two other medical projects in process. Dr. Gulick has served and held leadership roles on numerous committees over her 25 years in academia.
Dr. Gulick earned a Bachelor of Science in Athletic Training from Lock Haven University (Lock Haven, PA), a Master of Physical Therapy from Emory University (Atlanta, GA), and a Doctorate in Exercise Physiology from Temple University (Philadelphia, PA). She is an AMBUCS scholar and a member of Phi Kappa Phi (past chapter president) and Kappa Delta Pi Honor Societies.
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