Fast tester of blood sugar concentration

Abstract

A fast tester for measuring the concentration of blood sugar is composed of light source, crystal, amplifier, optical fibre, probe, signal amplifier, CPU, driver, phase locked loop consisting of said driver, phase discriminator, voltage-controlled oscillator and frequency N-divider, and the current-power amplifying output circuit consisting of pre-amplifier, power amplifier and RF output interface. In the driver there is an intelligent phase locked loop consisting of adder, D/A converter and microprocessor.

Description

technical field [0001] The invention belongs to the category of medical testing instruments, in particular to a rapid testing instrument for human blood sugar concentration. Background technique [0002] Diabetes is a common endocrine and metabolic disease with a high incidence. In China, only in Shenyang and Beijing from 1980 to 1989, the prevalence rate has risen from 1.21% to 2.35-2.93%. The number of diabetic patients in the country has increased nearly three times in the past 15 years, and the total number of patients has reached 3000. more than 10,000, and it is growing at a rate of 1% every year. In the United States, there are now more than 20 million people with diabetes. In Japan, according to statistics in 1999, the number of diabetic patients and potential patients has reached 6.9 million. Diabetic patients have metabolic disorders due to abnormal blood sugar levels, which can easily lead to serious complications such as diabetic ket...

AI Technical Summary

Problems solved by technology

However, because it uses the change of electrical signals for spectroscopic analysis, although the measurement speed is fast, it still cannot meet the needs of rapid detection of human blood sugar concentration components.

[0011] 2. The combination of interference filters is rarely used in practice because of its small wavelength, low measurement accuracy, and is not conducive to the expansion of measurement items, and the spectroscopic measurement time is also long.

[0012] 3. Grating spectroscopic, due to the use of mechanical scanning, spectroscopic measurement time is still long, so it is rarely used in practice

[0013] 4. Fourier transform spectroscopy is not often used in practice due to long measurement time and narrow spectral range, which requires huge equipment and is expensive.

And when there is a large frequency jump, since the output frequency of the voltage-controlled oscillator is basically proportional to the input voltage, the larger the voltage (the larger the frequency difference), the longer the required locking time, and the locking time is as long as several hundred Microseconds or even milliseconds, which greatly limits the improvement of frequency scanning speed, and also affects the quality and time of high-frequency signal output

Therefore, it still takes a long time in the detection process of blood sugar concentration components, and the detection effect is difficult to meet the requirements of the required standards.

At the same time, a general computer is required for detection, which lacks flexible on-site use, and the operation is complicated and costly. It is difficult to meet the needs of small medical units and patients' families for rapid detection of blood glucose concentration components.

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