Does United States FDA regulatory approval mean a medical device is safe and effective in low resource settings? The short answer is no. In developing countries, 95% of western medical equipment is broken within 5 years. In fact, only 30% of this donated equipment is ever even turned on. To enable Firefly phototherapy to work well in remote hospitals, we had to develop a novel cooling solution and a more robust electrical system that exceed FDA requirements.
- A More Sustainable Cooling Solution - In order to keep the electronics from overheating, most medical electrical equipment use fans that quickly break and vent holes that quickly clog with dust and bugs. These systems meet with FDA approval. Firefly uses a unique fully-sealed design with no moving parts to keep cool and use less energy in hot climates.
- A More Robust Electrical System - Many hospitals in low resource settings have power, but it varies up and down during the course of the day, blowing fuses on typical FDA-approved medical equipment. Firefly uses an external power supply so it can continue functioning during wide power fluctuations.
One of the common questions I am asked when I tell someone I am designing a medical device for the developing world, is whether we will be seeking FDA approval. The United States Food and Drug Administration (FDA) regulates medical devices ranging from complicated, high-risk medical devices, like artificial hearts, to simple, low-risk devices, like tongue depressors, as well as devices that fall somewhere in between, like sutures. FDA can regulate medical devices before and after they reach the marketplace.
Europe requires medical devices to achieve UL approval and CE Mark certification. These requirements mainly focus on quality manufacturing processes and design practices like choosing safe materials and minimizing radiation coming from a device. In contrast, gaining FDA approval allowing use in the United States is known to be the most expensive and time-intensive medical device regulatory process in the world because of the unique requirement to evaluate efficacy.
When people ask me whether we are pursuing FDA approval for Firefly, the subtext is whether we are building a safe device, and how we are balancing affordability, time until product launch, and safety for those we serve. My answer usually surprises them: Firefly has been approved by the Ministry of Health in Veitnam, is currently in the process of CE Mark approval, and we are also considering FDA approval. However, CE Mark certification and FDA approval don’t guarantee safe medical devices for low resource contexts.
For example, take the bank of broken, high-tech newborn incubators I saw while visiting National OBGYN Hospital, Vietnam. Our extended Firefly team was preparing to treat the first patient in the nine-room Neonatal Intensive Care Unit (NICU). The Firefly room was also used to observed all newborns shortly after birth and to treat the newborns with minor health issues. I noticed many newborns in the room lying inside incubators, traditionally used to provide enclosed, warm environments for critical or intensive care and at odds with the low-intensity care needed for the room’s newborns. I asked a nurse why some babies were in incubators and others in open beds. She said that they were broken incubators used simply to provide additional bed and storage space in this room. Some incubators had blown fuses due to power spikes, while others had undiagnosed failures that rendered them useless as anything but spare bedding. Many of these burnt-out devices passed FDA approval and so should therefore technically be considered effective, but there are so many ways a device can fail in a low resource setting. These incubators had become no more than fancy and cumbersome beds.
To design Firefly, we began our detailed engineering design process by pouring over the phototherapy standards used in the FDA approval and CE Mark certification processes. These standards are helpful in that they lay out how bright and uniform the light must be in order to provide clinically effective phototherapy. However, we knew early in the design process that just meeting the FDA and CE Mark standards would not yield a device appropriate for low resource settings. DtM’s partnership with East Meets West Foundation and Vietnamese manufacturer MTTS was essential to go above and beyond.
Together, East Meets West Foundation (an affiliate of Thrive Networks) and MTTS have over a decade of experience designing and manufacturing successful newborn health technologies for the poor. In close partnership with hundreds of hospitals in Vietnam, they discovered early on that Western devices fail due to poor training as well as environmental factors including heat, dust, and irregular electrical power. Our manufacturing and implementation partners are continually learning from hospitals, designing and releasing equipment, visiting to learn from any failures, fixing the equipment, and then redesigning the next generation of equipment to even better meet the challenges. Every piece of equipment they build also goes through a basic functionality test before it leaves MTTS. These tests have been custom designed to predict whether equipment will endure in the low resource environment. MTTS and DtM collaborated to recreate this same process for Firefly.
In order to design a device for success in low resource environments, we took two important steps. First, we poured over the phototherapy standards that FDA and CE Mark use to validate a medical device for use in high resource hospitals with climate control, filtered air, and smooth floors. After that, DtM used our human-centered design techniques to interview MTTS staff in-depth about their experiences in these environments. We invited MTTS to tell us stories of equipment failures and successes, encouraged them to dig up old photos to jog the memory, brought MTTS staff with us on hospital visits, and created a steady line of communication through a series of regular Skype calls to pass on new stories. Building on the best practices for phototherapy design in the first world alongside what we learned from our conversations with MTTS staff, DtM created a unique design that prevent bugs, dust, and liquids from entering and enables Firefly to keep operating during broad power fluctuations.
1. Keeping Cool while preventing bugs, dust, and liquids from entering. Typically, devices with electronics have holes. You may never have noticed, but if you look at your computer, most will have a series of perforations. Most devices with electronics also make a purring sound. For many electronic devices, both of these features are due to the need to keep the electronics cool. The purring sound is usually a fan, and the holes enable it to blow hot air out and bring cool air in. These features keep the device from becoming dangerously hot to touch, and also to ensure the electronic components can perform optimally.
In a U.S. hospital, electro-mechanical medical devices share these same cooling solutions. However, when these devices are taken to low resource contexts, they run into trouble. The interior fills with dust and insects. The fans are often the first thing to break, causing the electronics to overheat and burnout in the warm environment. A DtM friend in India quipped, “You haven't really tested a piece of electronic technology for distribution in Asia until you've trained a cockroach to climb in and pee on every single little component on the inside.”
Instead of fans, another way to keep electronics cool is by exposing a large surface area to the air. You may have noticed cooling fins on other home electronics like your refrigerator. Metal cooling fins increase the amount of area exposed to the air and increase conduction compared to a flat, plastic outer surface. In order to completely seal Firefly, DtM designed a novel passive cooling system for the top and the bottom. The top light was easier to design because heat rises: we manufacture the top light from an aluminum extrusion that has sufficient surface area on top to enable heat from the top lights to rise upward and away from the device. The bottom light was more difficult because any rising heat could directly contribute to overheating the newborn in the bassinet. For this issue, we designed a tilted bottom surface and installed cooling fins. Because hot air rises, air from the lowest part of the device rises up along the fins, cooling the base electronics and enabling the majority of the heat to rise off the rear.
2. Riding power fluctuations. A Duke University study found that up to 98% of medical equipment sent to developing countries is broken within five years. There are many causes, but one of the major issues is fluctuating power sources. Electrical power in Myanmar is 220v at 50Hz. Brownouts, blackouts, and voltage fluctuations are common, especially in the dry season. The typical Nigerian building experiences power failure or voltage fluctuations about seven times per week, each lasting for about two hours and without the benefit of prior warning. To enable Firefly to ride the waves, we knew we needed a serious power supply. However, the power supply is one of the main components generating heat in a device. Could we point to any existing examples of technology that were already good at working through power fluctuations and could solve the heat problem?
The answer? Laptops! During field research in hospitals in eight countries throughout Southeast Asia, we were always able to use our laptops! Most laptop power cords include a “brick” - that is the power supply. Reading the numbers on the brick, we could see it could accommodate a range of voltages for input. In the end, we were able to find an existing off-the-shelf power supply integrated with a power cable that is CE Mark certified for medical use, can accommodate 100-240 Volts AC, and keeps the hot power supply outside of our sealed device and away from the baby, just like a laptop power cord!
The evidence was laid out in front of us; FDA approval and CE Mark certification focus on hospitals with big resources. To design Firefly to work well in low resource contexts, DtM leveraged field experience to go beyond known phototherapy standards in order to deliver a device that meets a higher standard of care. In June 2014, Firefly received its certificate of free-sale from the Ministry of Health in Vietnam, a type of regulatory approval that enables distribution to 11 ASEAN member nations. Firefly is currently in the process of CE Mark certification, and we are also considering FDA approval to enable the device to reach western markets, creating new revenue streams and beneficial product pricing structures that will enable us to reach many more in the developing world. We are proud to partner with East Meets West Foundation and manufacturer MTTS and their joint vision of designing devices that really work in hospitals with few resources. Our partners will continue to monitor Firefly in the field, ready in case anything needs to be fixed, constantly learning what improvements we might make for the next generation.
Other references include the general IEC/ISO medical device standards and specific infant phototherapy standard used to design and evaluate medical electrical equipment for CE Mark and FDA Approvals. Design that Matters designed with these standards in mind, and then found where we needed to go above and beyond.
With visionary support from The Lemelson Foundation 2011-2013, Design that Matters formed a partnership with East Meets West Foundation (an affiliate of Thrive Networks) and Vietnamese manufacturer Medical Technology Transfer and Services to invent, design, test, manufacture, and deliver innovations to serve the needs of poor communities around the world. Our first product is Firefly Newborn Phototherapy, a world-class technology to treat newborns with jaundice. Firefly has won many awards including the Edison Award Gold, the top Spark! design award, IDSA IDEA Silver, and was featured in the October 2013 Fast Company Innovation by Design Award issue. Firefly is listed in the 2013 World Health Organization Compendium of Medical Devices highlighting the most innovative health technologies for low resource settings. As of October 1 2014, Firefly devices have treated over 5,000 newborns in ten developing countries across Southeast Asia (Vietnam, Myanmar, Cambodia, East Timor, the Philippines, Thailand, Malaysia), Sub-Saharan Africa (Ghana and Burundi), and the Caribbean (Haiti). Together, we expect to distribute at least 1,000 Firefly devices, reaching over 500,000 newborns.