3D Print Heart Rate Alarm: Patient's "bodyguard"

In recent years, 3D bio-printing has emerged as a powerful tool in the medical field. One remarkable example highlights how mature this technology has become. This breakthrough not only showcases the potential of 3D printing but also motivates more innovators to use 3D printers to provide life-saving solutions for patients. Frank Nguyen is now 17 years old, but since sixth grade, he has been deeply concerned about his mother’s health. Over the years, he has watched helplessly as his mother, Lan Nguyen, gradually lost vision in one eye and experienced worsening vision in the other. She also began suffering from hearing problems. Now, her condition is deteriorating further—she frequently experiences dizziness, thyroid issues, and dangerous heart rhythms. “My mom started getting really sick,” Nguyen said. “I’m scared she might have a problem, and I don’t know how to handle it.” However, during a summer program at Ryerson University, Nguyen found an idea that would change everything. He eventually designed a 3D-printed prototype of a heart rate alarm monitoring device. His goal was not only to help his mother but also to assist Others with similar medical conditions around the world. The current version of the device is a bit bulky, but it's functional. It can be worn on the wrist and uses a light and sensor to track the user’s heart rate. If the system detects an abnormal heart rate or a possible heart attack, it sends an alert via text message to a caregiver or emergency responder. Nguyen’s prototype is fully 3D-printed and includes two microcontrollers, an 8GB storage unit, and a short message delivery system. It uses cellular networks and GPS, all powered by a rechargeable lithium-ion battery. When the user wears the device, a small green light flashes beneath it. This light reflects back onto a sensor on the wristband, where a special algorithm calculates the user’s heart rate based on voltage changes. The device stores heartbeat data over time, and the information can be accessed through a built-in memory card. Additionally, the device can automatically call 911 through a virtual network. When it detects an irregular heart rate, it sends a real-time message containing critical details such as the patient’s age, medical history, and location. This feature could potentially save lives by ensuring timely medical intervention.

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