Filtration system and method for obtaining a cytology layer

Details Filtration system and method for obtaining a cytology layer Filtration system and method for obtaining a cytology layer

2008-01-08

2008-01-08

Menon, Krishnan S. (Department: 1723)

Liquid purification or separation

Filter

With pump, gas pressure, or suction source

C210S321750, C210S435000, C210S456000, C210S649000, C210S767000, C422S105000, C422S105000, C422S105000

Reexamination Certificate

active

07316779

ABSTRACT:
A filter assembly for separating and collecting a layer of particulate matter (e.g., cells) from a liquid containing the particulate matter (e.g., a biological fluid specimen). The filter assembly has a holder and contiguous inner and outer fluid pervious media. The outer fluid pervious medium is attached to the sidewall of the holder. The inner fluid pervious medium is of low fluidic impedance relative to the outer fluid pervious medium. The filter assembly is designed for use in a separation housing that defines two flow paths between inlet and outlet, one directly through the filter and the other around the periphery of the filter. The inlet portion of the housing has a central inlet in a radially sloped surface that faces the filter collection site. A movable suction head is adapted to cooperate with the housing and the filter assembly.

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