In order to improve patient access to nurses during emergencies, a wireless wrist-mounted call button system was developed. The goal of this project was to create a simple, easy-to-use system that features a completely passive, wireless call button. Three major problems in existing systems — inability for patients to locate or reach the button, unnecessary user interface complexity, and the introduction of a potential vector for hospital-contracted illness — were addressed in the design. The wireless nature of the device ensures that it is always near the patient. A single-button interface considerably simplifies its use in comparison to multi-button systems, eliminating the possibility of incorrect button presses. Finally, the proposed call button uses inexpensive technologies and can be manufactured for such a low cost that it can be offered as a single-use device, eliminating the possibility of patient-to-patient disease transmission. Using radio-frequency identification (RFID) technology, patients are able to call for hospital staff from any location in the hospital that is covered by readers. The call button uses a passive RFID tag that can be turned on or off by a mechanical switch. A second tag is used to notify the system when a patient is out of range. The design was prototyped and tested, and future improvements are suggested.
Design of a Wireless, Passive, Single-Use Emergency Call System
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Staats, WL, Lorenc, DP, Zhang, Z, Huwe, EL, Barineau, MM, & Slocum, AH. "Design of a Wireless, Passive, Single-Use Emergency Call System." Proceedings of the ASME 2010 International Mechanical Engineering Congress and Exposition. Volume 2: Biomedical and Biotechnology Engineering. Vancouver, British Columbia, Canada. November 12–18, 2010. pp. 731-740. ASME. https://doi.org/10.1115/IMECE2010-40681
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