Where are the improve performance of Blood analyzer holes tube technology ?

Blood analyzer holes tube technology improvement in performance and flow technology improvement and counter-attack flow device improvement and water power focus on technology improvement, the concrete content shown below:

Pore pipe is blood analyzer for counting the key components, early blood cell analyzer medical equipment generally only a diameter for 100 μ holes pipe, use gem after laser precision punching, and then again Mosaic glass support. Now most of the resistance method instrument holes tube in the leucocyte detection use diameter for 100 μ holes tube, in red blood cell and platelet detection use diameter is 60 ~ 80 μ holes tube, materials have gem and special ceramics constitute. For example the classical COULTER external holes tube, and when something plugging holes available brush cleaning or direct tear open come down to clean. Early holes pipe generally exposed to the outside, its main purpose is to facilitate manual cleaning, more for single tube way, carries on the white blood cells to red blood cell count conversion when had better cleaning. Later development for the red and white blood cells of two independent exposed holes tube, generally 20 seconds can also complete the red and white blood cells of the count, need to artificial use pipette or quantitative straw from leucocyte dilution suspension in the red blood cells of the secondary dilution or supporting the use of the dilution device. The blood cell analyzer holes usually use built-in, reduce the pollution of the opportunity and also provides automatic cleaning function, make every time counting can provide automatic flushing, reduce the cross contamination opportunities at the same time counting speed also have greatly improved.

In order to more accurate to the cell count and prevent all kinds of interference occurs, the medical instrument company in the design and improvement of small tube used on different treatment scheme. These technical powerful guarantee blood cell analyzer accurate, especially the accuracy of platelet count.

First, sweep flow technology: to reduce already through the count holes due to fluid backflow and re-entry count area caused by repeat count, in the hole behind add a sweep flow fluid system, will count the cell through the sweep flow liquid rushed into the waste pipe.

Second, counter-attack flow device: to prevent cell to return to count sensitive area, in the hole behind add a perforated when plate, with negative pressure will have been counting the cell block directly after waste collected in the pipe.

Third, water power focusing technology: that is the most effective method, also called sheath flow technology. It is through the use of fluid dynamic principle, can ensure that cells in the sheath liquid center side by side in a column by detecting hole center or through the laser beam center, and ensure that it will not return to sensitive area, at present a lot of more advanced blood analyzer generally USES this technology.

Article : From Perlong medical (http://www.pl999.net/)
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