NON INVASIVE BLOOD GROUP DETECTOR USING IRSENSOR

Abstract

The estimation of blood group of an individual is important in different circumstances like transfusion and
transplantation. Every individual have a different antigen in their red blood cells. An individual above six month of
age have antigen formed in the outer layer of the RBC which determines the blood group of a person .The
conventional method involves drawing of blood sample from the patient and adding chemical reagent to the blood and
interpreting the blood group of the patient .Based on the agglutination of the antigen with the antibody present in the
blood samples. It may consume time, there are chances of clinical errors. When there arises incompatibility of blood it
may become fatal as the antibody may destroy the red blood cells in the blood of the donor. In the proposed method the
puncturing of patient’s skin is avoided. optical signals reflected from the patient antigen is used to detect the blood
group.IR sensor is used in the experiment emits a light when a voltage is generated across its terminals.The emitted
light is reflected back by the antigen present on the surface of the RBC.The ray reflected back is received by the
receiver it generates a voltage based on the intensity of the reflected light .The optical property may differ for every
antigen thus based on the voltage generated blood group of the individual is found. The method consumes less time
hence can be used economically in hospitals.