Optical Sensor of Coplanar Structure Study and Design for Intravenous Solution Exhaustion Alarm System

Abstract

Intravenous (IV) infusion set is one of the most common treatment methods applied to hospitalized patients. However, it is necessary to check the injection of IV solution in order to prevent patients from any possible medical injuries. In this paper, using the optical sensors to detect exhaustion of IV solution was proposed. The optical sensor is coplanar structure composed of LED and photodiode which is installed according to focal distance of the lens. These two elements detect exhaustion of IV solution at the desired point conveniently.Through the results of experiments using various wavelength of LED (R.G.B), the blue LED was selected to the optimum light source. The suggested optical sensor can detect exhaustion of IV solution by the differences in the amount of light which is caused by properties such as total reflection, refractive index and scattering. From the implementation, the detector is applicable to both containers of IV solution, glass bottle and plastic pack. And also the result shows apparent differences according to existence of IV solution even if the IV solution color and illumination were changed.

Development of an Al-load-cell-based wireless ringer’s solution monitoring and alarm system: insight into vibrational error correction

“…These systems have focused on the infusion rate rather than the fluid level because an excessive flow rate of Ringer's solution is a serious risk to patients [10,11]. Therefore, most WRMA systems use ultrasound or a high-precision optical sensor to detect the dropping solution [12][13][14][15][16]. However, such droplet monitoring sensors are inefficient for detecting the solution level because of their high cost and large size [17].…”