Detection system for improving accuracy of measuring packed cell volume accuracy and operating control method

Abstract

The invention provides a detection system for improving the accuracy of measuring the packed cell volume and an operating control method. The detection system for measuring the packed cell volume comprises a central processing unit, an excitation source unit, a blood sample unit, a precision measurement circuit unit and a signal acquisition unit. The detection system provided by the invention has the beneficial effects that a sine wave is generated through the excitation source unit, the central processing unit is used for controlling, and the measurement accuracy of HCT is improved; the detection system provided by the invention is simple and reliable, and the precision measurement is realized; and the measuring accuracy is higher than the traditional measuring technique and can achieve 0.2%. As the detection system is provided with a self-detection function, the measurement is very reliable, and no circuit fault is generated to lead to wrong measured data.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a detection system and an operation control method for improving the accuracy of measuring hematocrit. Background technique [0002] HCT (hematocrit) is hematocrit, which is a very important parameter in the field of blood analysis. After anticoagulant treatment, the blood can be divided into two parts by centrifugation, plasma and blood cells. If the blood is centrifuged in a special test tube (Wenten tube) according to the specified time and speed, the red blood cells will be completely compacted at the bottom of the test tube, and the red blood cells will be in close contact with each other, and all the plasma will be eliminated as much as possible. At this time, the plasma will be completely squeezed out on top of the blood cells. At this time, the percentage of red blood cells in the whole blood is the hematocrit we want to get, that is, the volume (or percentage) of the comp...

AI Technical Summary

Problems solved by technology

If the central processing internal DAC method is used to generate a sine wave, the refresh rate is too high (to generate this 100KHz sine wave calculation, using the DAC method, drawing at least 50 points in each cycle can draw a relatively smooth sine wave, that is The refresh rate of the DAC reaches at least 5Msps, and it must be refreshed every 0.2us), which greatly occupies the resources of the central processing, causing other programs to fail to run, which is also not advisable

[0009] In addition, traditional HCT detection devices are complex in design and poor in reliability

[0010] Therefore, in summary, traditional HCT measurement devices are difficult to achieve precise measurement

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