INTRODUCTION
1.10
ThinPrep 2000 Processor Operator’s Manual
Waste Clearing
When collection ends, the ThinPrep Pap test filter is withdrawn from the sample vial and the filtrate
is aspirated into the waste bottle as the filter is inverted. The collected cells remain on the ThinPrep
Pap test filter due to the negative holding pressure.
Bubble Point
Bubble point removes excess fluid from the filter membrane prior to transferring cells onto the slide
to enhance cell adhesion to the slide.
Bubble point is performed after all of the fluid is evacuated. This is evident by the bubbling activity
on the inside of the filter membrane. Cells do not air-dry during bubble point.
Cell Transfer
When bubble point is complete, the slide handler moves the slide into contact with the inverted
ThinPrep Pap test filter.
The natural adhesion properties of cells and the electrochemical charge of the glass slide are
responsible for the transfer of cells from the filter membrane to the slide. The cells have a higher
affinity for the glass slide than for the membrane; slight positive air pressure behind the filter
membrane enhances cell transfer.
Slide Ejection
Once cell transfer is complete, the slide is removed from contact with the filter and automatically
ejected into the fixative vial.
Cycle Completion
All the motorized mechanisms return to their initial positions and the display returns to the Main
Menu. If the system detects an error during the process, a message will be displayed and an audible
alarm will sound.
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