Using the blood cell analyzer to answer questions

What are the developments in the 1 blood cell analyzer?
With the rapid development of electronics, optics, mechanics, chemistry, hematology, immunology and so on, especially the application of electronic computers, the automatic analysis of Hematology has entered a new stage by the application of various high-tech combination. In addition to the identification of the volume of electrical impedance, the cell type identification technology uses the high frequency current to measure the conductivity of cells to detect the ratio of the nucleus to the cytoplasm, and then identify the particles in the cells by light scattering, and also use the blood cell analyzer of laser and cytochemistry and laser and polarization light to make white cells. The classification technology is more accurate. Some instruments can also measure the distribution width of hemoglobin in the red cell, the index of leukocyte peroxidase, the left shift index of the left shift of granulocyte, the lymphocyte subgroup analysis, the red cell of the fluorescent analysis reticulocyte and the low fluorescence intensity net red (LFR), the medium fluorescein intensity net red (MFR) and the high fluorescence intensity reticulum (HFR). . With the progress of computer technology, the manufacturers of blood cell analyzer have adopted advanced microcomputer software to automate the mixing, sampling, reagents, counting, identification and printing results of the whole blood specimen, automatic timing cleaning, failure display, reagents and quality control objects, storage, inquiry and detection. The results and the statistical analysis of the quality control data.
These combinations create conditions for modern blood cell analyzers to move towards intelligent and full laboratory automation.

2 how to choose a qualified blood cell analyzer Meilun?
There are many kinds of blood cell analyzer in the current market. How to choose correctly is a great concern to many clinical laboratory workers and often wants to know. It is suggested that the following questions should be taken into consideration when selecting and buying.

2.1 pre purchase preparation. The basic knowledge of the blood cell analyzer must be accumulated. What are the types and trends of development? Are the testing principles of resistance or laser? Is it radiofrequency or light scattering? Is it multi angle polarized light scattering? Or histochemistry, etc.? What are the main properties of this instrument? What parameters can be measured? The sample size is 25 l end blood. Is it 60~125 Mu l venous blood? The speed of measurement is 40 s, 60 s, 72 s? Should it be used in the outpatient inspection, or the patient in the ward in accordance with the scope of work and the workload of the laboratory, or in the general analysis or scientific research? The performance and requirements of the selection of the instrument are different. When considering the benefits to the patients and the economic benefits at the same time, that is to say, when the income of the specimen is measured every day, when will an instrument recover its cost?

2.2 selected three classification or five classification? According to the hospital level in the three level hospital can be integrated to select the comprehensive feature recognition function of the five classification instrument, because of its good performance, automation, intelligent degree, but the price is not very good. In the two level hospital, we choose the popular three classification instruments with moderate price. These instruments differ greatly in the price of the analysis parameters and the degree of automation, while the first grade hospital or the township and Street hospitals have no classification function but can count the 7~8 parameters of red blood cells, white blood cells and platelets. An automatic or fully automatic instrument.

2.3 pay attention to hospital development, consider performance price ratio, and do research work for manufacturers and users. General selection of a blood cell analyzer to consider the development of 3~5 years of hospital, the performance can not only listen to the manufacturers, the manufacturers to provide similar instruments in the vicinity of the medical units to visit, consult, what are their experience and experience in their use? What are the problems encountered? How to evaluate the instrument? It is best to do it yourself. Repeat the test to observe the performance of the instrument; the new instrument provided by the manufacturer should carefully read the instructions of the instrument and the user's use report, and further understand the key points of the use and maintenance and the good after-sales service. Make a comprehensive consideration of making a decision.

3 blood cell analyzer which are easy to troubleshoot and how to exclude? The current blood analyzer used in China is mainly an impedance instrument. Although the mechanical part is constantly improved and the computer is used to make the instrument easy to operate, it is convenient for maintenance, but it can still be out of trouble in the process of use. The most common microporous plugging for the detector, and other non electronic faults such as loose connector connections are also visible, and the operator's unfamiliarity or negligence and other reasons such as ambient temperature, humidity, and the application of unsuitable reagents can lead to failure. The micropore blockage of the detector is divided into two categories: complete plugging and incomplete plugging. Full plugging is easy to identify because it does not display test results or has a "Clog" logo on the screen. But the incomplete plugging hole can be changed according to the observation count time, the abnormal graph appears on the oscilloscope, the instrument makes irregular sound, or the counting indicator flashes and so on.

The causes of plugging are: (1) using cotton swabs and cotton ball wiping tube to mix cotton fibers into blood samples; 2. The blood part is low or punctured, bleeding is not smooth, the bleeding is not smooth, the end blood is overextruded to form fibrin filaments, platelet aggregation or small clots are generated; and the protein produces degeneration and sink when the blood samples are counted through micropores. Deposit in the micropores and not be cleaned in time; (4) the specimen cup is not covered, causing the dirt and dust into the air (the black and yellow particles floating on the liquid surface of the cup); 5. For a long time, the instrument is shelved and the water vaporized in the reagent, and the salt crystals are blocked. The best way to prevent plugging is to set filter net to increase anti blocking property on the channel of blood sample diluent, increase the automatic cleaning function inside and outside the sample needle, adopt constant temperature measures to reagents, and also be useful for high pressure electron beam burning. In view of the above reasons, it is possible to use the guard.