3D printing handheld device: reading patient vital signs in seconds

In the world of *Star Trek*, fans are familiar with the iconic medical tricorder—a handheld device that allows doctors to quickly and accurately assess a patient’s condition, eliminating the need for traditional tools like stethoscopes or blood tests. This futuristic gadget can capture vital health data in seconds. While it may sound like science fiction, scientists are now bringing this vision closer to reality, thanks to advancements in 3D printing. Recently, a team of engineers at Johns Hopkins University, led by Dr. Gene Fridman, an assistant professor of biomedical engineering, has developed a groundbreaking 3D-printed device. This innovative tool can measure a patient’s key vital signs in just seconds. The device uses a thumb pad and mouthpiece to collect data on blood pressure, oxygen levels, heart rate, body temperature, and more. The thumb pad includes a mini pulse oximeter to monitor blood oxygen, while the mouthpiece uses advanced algorithms and multiple sensors to gather additional health metrics. This project has led to the formation of a company called Multisensor Diagnostics, which named their invention "MouthLab." Although still in its prototype phase, many of the device's components have already been 3D printed, significantly reducing both time and cost in the development process. Dr. Fridman describes MouthLab as a "check engine light" for the human body. It can be used at home or in emergency situations without requiring any special training. “It can collect more data than ambulances, emergency rooms, or even a doctor’s office during a medical evaluation,” he explains. The team’s current goal is to enable users to simply hold the device, breathe normally, and get their vital signs measured within 10 seconds. The final product will display the collected data on a built-in screen and also send the information to a laptop or cloud platform for further analysis. According to Fridman, "MouthLab empowers people who aren’t medically trained to make better decisions about their health. It has the potential to improve healthcare in underdeveloped areas, reduce the burden on emergency rooms, and lead to earlier detection and treatment of diseases." With ongoing research and development, this technology could soon become a game-changer in personal and public health monitoring.

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