Pressure control device of liquid-based cell preparation machine

Abstract

The invention provides a pressure control device of a liquid-based cell preparation machine, and the device is used in pathological examination, and is formed by an air pipe, a control system, and a negative pressure pulse pump. The device is characterized in that a pressure sensor is installed in the air pipe, and a signal output line of the pressure sensor is connected with the control system. When the device is used, according to compression strength of a filtering film and a pressure parameter when cells are absorbed on the filtering film in optimal number, a pressure parameter value is set on the control system, so as to overcome problems of explosion film and insufficient cell amount. The device is simple in manufacturing, convenient in use, and good in preparation effect.

Description

technical field [0001] The invention relates to a pressure control device of a liquid-based cell film maker used in pathological examination. Background technique [0002] At present, the commonly used method is to take time control. During the process of collecting cells by the filter membrane, set a collection time in the control system. When the collection starts, the control system starts the negative pressure pulse pump, and the trachea on the negative pressure pulse pump passes through the filter membrane. The cell preservation solution is extracted, and the liquid in the cell preservation solution is discharged through the membrane pores and the trachea of ​​the filter membrane, and the cells are adsorbed on the filter membrane. When the time set point is reached, the acquisition stops. Since this acquisition process is a set time, the time setting can only be set by experience, experimentation, and the average time under normal circumstances. Two situations may occu...

AI Technical Summary

Problems solved by technology

One is that when there are many cells in the preservation solution, the cells will quickly adsorb on the filter membrane, and the pores of the filter membrane will be quickly blocked by cells, but because the set time has not come, the negative pressure pulse pump will continue to stop The negative pressure pulse generated by it will add all the pressure to the surface of the filter membrane. When the pressure resistance of the filter membrane cannot reach the pressure of the negative pressure pulse, the negative pressure pulse will cause the filter membrane to tear, which is what is usually called The so-called bursting film phenomenon makes the production work unable to be completed

Second, when there are few cells in the storage solution, only a few cells can be collected within the set time, while there are still many cells in the remaining storage solution, but they cannot be adsorbed to the storage solution due to the stop of the negative pressure pulse pump. filter membrane

The film production effect is not ideal due to the insufficient amount of cells, nor can it be achieved

will cause missed diagnosis

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