As a water-based indispensable body fluid, blood is like a tiny creature full of strange life energy circulating in the body to maintain the health and vitality of the body. Nowadays, as a humanitarian spirit, unpaid blood donation has become a symbol of the degree of social civilization. It is also a form of blood donation advocated by the World Health Organization, the International Red Cross, the International Red Crescent Society and the International Blood Transfusion Association. Value and concern. These blood are usually stored in a blood bank and kept by medical units and blood stations for use when transfusion is needed. How to store blood and ensure the quality of blood is the core and key to the problem.
The blood that leaves the human body will naturally condense at a normal temperature for a period of time, so the blood in the blood bank must be treated for a long time before being preserved. As for the story behind the blood treatment process, Xiaobian is very interested, take everyone to find out today!
Into the "mysterious" blood station
Xiao Bianqiqi led everyone to visit a central blood station located in a city in southwestern China. It mainly conducts unified management of blood resources in the whole district, provides clinical blood, emergency blood, conducts blood quality monitoring, and conducts blood transfusion research. , teaching and blood collection work.
In the component department of the blood station system, it mainly involves the preparation of various blood component products, and the most common is to preserve the platelet link. In order to prevent platelet condensation in the plasma sample, it is necessary to add an antifreeze named dimethyl sulfoxide, and then use a reciprocating shaker to start the timing and constant mixing, generally shaking at 100 rpm for 5 minutes. After shaking, put the plasma in the refrigerator and save it for one year. Used during the shelf life, plasma samples are guaranteed to be as fresh as ever.
In addition, in the laboratory of the blood station system, in order to prepare "glycerolated red blood cells", an oscillating mixing device is required, and sometimes a reciprocating shaker is required. "Glycerated red blood cells" is the predecessor of "frozen red blood cells" and is the key operation link for the preparation of "frozen red blood cells". As the most commonly used protective agent for cryopreservation of red blood cells, glycerol plays an important role in reducing red blood cell damage after freezing. The main function is to ensure the osmotic pressure balance inside and outside the red blood cells and avoid red blood cell rupture and hemolysis. Most blood stations in China prepare frozen red blood cells by "low temperature and slow freezing method", that is, the final concentration of compound glycerol preservation solution and red blood cells is 40%, and it is frozen and stored in the environment below -65 °C, and the effective period is up to ten years. ã€1】
In the process of mixing plasma with antifreeze, it is necessary to continue mixing the sample at a consistent and uniform speed. The mixing method used in the blood station is not effective, stability and controllability are not guaranteed, so the sample is prone to occur. Condensation. However, when the Ohaus digital display reciprocating shaker is selected, the accuracy and repeatability of the plasma sample shaking results can be ensured by consistent and uniform shaking action – all thanks to the “neural†of the entire instrument. Hub" - microprocessor controller and load sensor. The slow-speed design of the microprocessor can slowly and safely increase the speed to the target setting to avoid open sample spills, while displaying the last set point, which can be restarted after a power failure; the load sensor can Sensitively detects imbalance and automatically reduces it to a safe speed to protect the sample. The entire process greatly enhances the automation of the instrument product, thereby saving the cost of manual monitoring operations.
How is the Ohaus Shaker made?
In addition to the above features, the Ohaus digital display reciprocating shaker has the following features to make its products more intelligent and data management more convenient:
Three eccentric shaft drive
Permanently lubricated ball bearings and maintenance-free brushless DC motors ensure reliable operation and continuous operation;
2. Intelligent LED display
The touch panel features an LED screen that is easy to read data, display speed and run time. In particular, the timer can program the elapsed time as a user-defined limit, and the device automatically turns off when the time is zero;
3. Operating conditions adapted to extreme environments
The equipment can be operated in a freezer, incubator or non-condensed carbon dioxide environment with a temperature °C and a humidity of up to 80%;
4. Easy and convenient data communication
The body is equipped with an interface that provides two-way communication for data logging and device control.
After reading the above-mentioned attractive features, do you have any movements, of course, there may be many people who want to say that Xiaobian has begun to boast, then let’s see what the blood station staff who used the products said. "Compared to the shakers of other brands we have used before, Ohaus USA's fully imported reciprocating shaker is powerful, easy to use, stable and controllable, the key is mixed blood. The sample quality is uniform, never deteriorated, greatly improving the efficiency of the entire blood treatment, is definitely a super cost-effective product. We will promote to other parts of the blood station system!"
How about, after reading the above-mentioned customer's evaluation, is there any more convincing for you to write a small series? If you would like more information on the shaker series or Ohaus other laboratory equipment, or are looking for more professional and detailed selection guide, please call 4008-217-188, or click to enter "Request Information" and stay With relevant information, our professional engineers will contact you in the first time!
[1] References: Li Yancheng. Key operational steps affecting the quality of preparation of "glycerolated red blood cells" [J]. China Comprehensive Clinical, 2015, December
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