LED TECHNOLOGY BASED PORTABLE PHOTOMETRIC DEVICE AND METHOD FOR IN- VITRO QUANTIFICATION OF BLOOD HAEMOGLOBIN CONCENTRATION

摘要

The present invention relates to a device and method for in vitro photometric quantification of haemoglobin concentration in blood. The present invention comprises a LED light source whose wavelength is between 530 and 550 nm, a cylindrical sample holder, whose diameter is between 7 to 15 mm, an optical path assembly, a photo sensor to perform the sample photometry and a microprocessor for automatic switching-on of the light source, to acquire the signal obtained by the photo sensor, to perform the haemoglobin concentration calculations, and to display the results on a touchscreen LCD. The device uses a pre-filled and sealed clear glass ampoule, which is simultaneously a cuevette for the reagent, as sample container and as an optical component in the process, allowing photometric reading through its walls. In order for a one step measurement, the device is pre-calibrated using light amber glass ampoule (optically defined Calibrator Low) and a dark amber glass ampoule (optically defined Calibrator High). Barcode scanner, which is an optional in-built fitment, if available can be used to identify sample ID of the patient if pasted on the glass ampoule neck as a barcode label. The USB interface helps send test results from the meter to the computer which can further be formatted and printed, and can be further be disseminated through internet or cloud computing, for further use. The battery backup enables Hb testing in remote and rural areas. FIG. 6