| Summary: | 碩士 === 國立陽明大學 === 醫學工程研究所 === 94 === The purpose of this research is to establish outter leakage detection
system for intravenous infusion pump. If the infusion oozes out of blood
vessel, it will cause the tissue temperature dropped. Therefore, this
research utilizes temperature detection technology to monitor tissue
temperature. When the temperature drops exceed a predetermined
threshold, the system will shutdown and alarm for medical-aid attention.
When infusion leakage happens, patient will feel pain and swollen at
the injection site. Moreover, it will cause tissue necrotise. For some
severe cases, patient will have to amputate the limbs. For those who has
more toleration on pain, the leakage would cause severe injury when the
patient felt that the pain was unable to endure. As can be expected, this
situation worsen on the vegetable or the infant who cannot express
themselves well.
Human arm skin temperature is around 33℃ and the intravenous
injection fluid in the hospital is around 20~23℃. Therefore, when the
fluid is properly injected into the vessel, the blood can wash away the low
temperature fluid. However, when the leakage occurs, the fluid will
accumulate and will cause a temperature drop at the location between the
skin and vessel. Thus, a sensitive thermal detector could detect the
temperature variation. When the temperature drop exceeds a predefined
threshold, the system would determine that it is an intravenous injection
10
leakage. And it will stop the intravenous drip, and set off alarm to notify
the medical staff.
In this research, we utilize pigs to do the animal test. These results
show that under infusion speed of 25, 50, 75 and 100 ml/hr, the
extravasation temperature and normal infusion temperature all have
significantly difference. Therefore, temperature extravasation detection
system can detect the leakage under 2.2ml of leaking. In concolusion,we
suggest that the temperature sensing technology maybe apply in low flow
speed vein infusion extravasation detection.
|
|---|
