Development of Non-Invasive Monitoring System of Hemoglobin Level – Application to Drip Infusion Therapy

Hiroyuki Nozaka1

  • 1HIROSAKI UNIVERSITY

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13:25 - 14:15 | Thu 16 Feb | Ballroom D | ThRPF.18

Session: Rapid Fire Session 02: Sensor Informatics I

Abstract

I. INTRODUCTION Drip infusion is the most popular medical treatment. However, it is reported that extravasation from blood vessel is often caused. The aim of this work is development of non-invasive and simple monitoring system in drip infusion therapy. In this study, we developed monitoring technology of hemoglobin level with optical sensor, and evaluated application to drip infusion monitoring. II. SYSTEM CONFIGURATION This system is composed of two photo-reflector units, amplifier circuit, filter circuit and "NI-Compact DAQ". Application software was developed by "NI-LabVIEW". III. SYSTEM EVALUATION Each photo-reflector was placed on blood vessel at the peripheral and central site of the infusion position. After drip infusion starting, the reflected light intensity was measured, and the changing rate from initial value was calculated. We evaluated correlation between the flow speed of drip infusion and the changing rate of the reflected light intensity with optical sensor. IV. RESULTS Biochemical hemoglobin level showed decline in conjunction with the flow speed of drip infusion. The changing rate of the reflected light intensity at the central site showed increase, and it correlated to the flow speed of drip infusion. V. CONCLUSION Our studies suggest increase of the intensity of reflected light is associated with dilution of hemoglobin. This method is useful in terms of non-invasive and simple. Our future work is application to detect extravasation from blood vessel.