By Matt Tomory
Ultrasound transducers are highly complex, Class ll medical devices that we see all the time on television, in health care facilities and even throughout this and other periodicals. Have you ever given thought to how they are designed, manufactured, tested and repaired?
Innovatus Imaging maintains two facilities dedicated to ultrasound probes: Our FDA-registered Center for Design and Manufacturing in Denver, Colorado and our Center of Excellence for Ultrasound Repair in Tulsa, Oklahoma which, together, combine to address the entire lifecycle of transducers including design, engineering, manufacturing and finally restoration to OEM form, fit and function.
A transducer begins life as a series of user needs, intended use(s) and requirements or design inputs and ultimately ends as a finished product, but there is a tremendous amount of work and testing that occurs in between. This includes electrical, mechanical, acoustic and chemical verifications and validations. We need to ensure we are manufacturing a safe and effective product in which output equals input or did I make the transducer correctly? Further, it’s critical that the product meets user needs and intended use(s), or did I make the correct product? Our Denver facility manufactures ultrasound probes from concept to production and must follow FDA regulations every step of the way.
Many of these same manufacturing processes and philosophies are implemented when we engineer solutions for ultrasound probe restoration. The objective is to return a probe to OEM form, fit and function and not significantly change safety, performance or intended use. Because we are a manufacturer, we have all the necessary instruments, knowledge, training and processes to ensure this outcome as well as to design and manufacture proprietary test and repair fixtures based on the specific needs of various OEM makes and models.
Let’s look at a component which may appear simple: the transducer cable. There are one-size-fits-all solutions available, but there are many electrical parameters (characteristic impedance, DC resistance, shielding) and physical characteristics (length, diameter, color) which differ from probe to probe and OEM to OEM. Using sophisticated instruments, we benchmark new OEM cables to determine their specifications and then design to those specifications. These cables are then stress tested using customized “torture” devices as well as undergoing electrical and acoustic verification. In fact, we currently manufacture over 60 different transducer cables to ensure OEM-like performance.
Plastics and lens materials may seem simple as well until you research the dozens of OEM recommended cleaners and disinfectants for the hundreds of probes we restore. All materials used must be not only compatible with recommended cleaners and disinfectants but ISO 10993 compliant (biocompatible).
Once our Design and Manufacturing Center completes and approves a material or process, it then transfers to our ISO 13485:2016 registered Ultrasound Repair Center to be implemented into our probe restoration processes. This is continuous as new devices enter the market and will have different characteristics and designs which we will have to engineer.
By being an ultrasound probe OEM, we understand the entire lifecycle of transducers and, after over 150,000 probe repairs to date, we understand not only how they fail but how to restore them to provide many additional years of patient care.
Matt Tomory is the Vice President of Ultrasound Center of Excellence for Innovatus Imaging.
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