| Summary: | 碩士 === 中原大學 === 生物醫學工程研究所 === 107 === During the hemodialysis treatment, two needles, for drawing to dialyzer and for returning filtered blood to the body, respectively, will be inserted into AV shunt. Occasionally, the blood leaking is occurred on the interface of needle and artificial fistula. This incident not only increased the risk of infection, it also caused many conflicts between patients and nurses. This paper presents a wireless alarm system that can detect the blood leaking and send the alarm signal to nurse station. The system is consisting of two optical blood detectors, a Wi-Fi embedded MCU, and an user-friendly alarm application. The system continuously send greed light on the gauze. When certain amount of blood pass through the gauze, the decreasing of reflection light would activate alarm event. A MS-Windows application is installed on the nurse station. It monitors the front-end sensing devices and receives alarm signal, then displays the result on the computer screen and reminds medical staffs to take care of the event. The primary test shows the system can effectively provide early blood leaking detection and reduce the rate of aforementioned problems.
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