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Apparatus for measuring the concentration of target substances in blood
专利权人:
Orsus Medical Limited
发明人:
Chaudry, Sabih
申请号:
AU2017219994
公开号:
AU2017219994A1
申请日:
2017.02.15
申请国别(地区):
AU
年份:
2018
代理人:
摘要:
A non-invasive testing apparatus for determining a concentration of a target substance, such as blood sugar,blood alcohol, cholesterol,etc.,in a patient's blood is disclosed. The apparatus and method involve applying an output RF signal (102) to the skin of a patient via an antenna(20), and measuring the amplitude and phase of a response signal, which is a function of the output RF signal (102) modified by an interaction with the patient's blood. The invention takes measurements at different output RF frequencies (310), and plots the response (300) as a function of frequency (310). The invention is essentially characterised by deriving various derived parameters (552, 554, 556, 550, 408, 410) from the shape of the resulting plots, namely any or more of: a resonance frequency shift; a Q factor of the resonance; a group delay; a phase shift; an amplitude variation; a shape factor of the plot; and a gradient of the plot at different frequencies. The invention utilises models of the derived parameters as a function of concentration of the target substance in blood to arrive at a determination of the latter. Also disclosed is a novel circuit (1000) for obtaining the amplitude and phase measurements, a calibration device (5008), and various improvements relating to wearable non- invasive testing apparatus (3000, 4000).
来源网站:
中国工程科技知识中心
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