Cell block processing station
View Patent ↗A system for making cell blocks includes a cell block cassette and processing station, the cassette including a main body having a having a collection aperture formed therein and a filter assembly removably attached to the main body, the filter assembly defining a collection well in communication with the collection aperture, and having a filter positioned across a bottom surface of the collection well, the filter configured to retain cellular matter carried in a fluid that is dispensed into the collection well and flows across the filter. The cell block processor has a cassette interface removably seating the cell block cassette, and a sensor positioned or positionable to detect and monitor a fluid level in the collection well. The processing station includes an automated fluid delivery system operable to dispense a fluid into the collection well, and a controller operatively coupled to the fluid delivery system, wherein the controller causes the fluid delivery system to selectively dispense fluids into the collection well based at least in part on a flow rate across the filter determined at least in part based on changes in the monitored fluid level in the collection well.
1. A cell block processing system, comprising:
a cell block cassette defining a collection well with a filter disposed therein;
a cell block cassette interface removably seating the cell block cassette;
a sensor positioned or positionable to detect a fluid level in the collection well;
an automated fluid delivery system operable to dispense fluids into the fluid collection well;
a controller operatively coupled to the fluid delivery system, wherein the controller causes the fluid delivery system to selectively dispense fluids into the collection well based, at least in part, on a flow rate across the filter that is determined based on a change in fluid level in the collection well detected by the sensor;
a waste chamber underlying the cell block cassette interface, the waste chamber comprising an interior and a sealable interface that engages a sealing surface of the cell block cassette;
a valve assembly in communication with the waste chamber and controllable to evacuate liquid and solid waste from the waste chamber interior; and
a heating element coupled to the valve assembly and configured for controllably heating the valve assembly.
2. The cell block processing system of claim 1 , further comprising a vacuum source that may be selectively placed in communication with the waste chamber interior so as to draw into the waste chamber interior air, fluid, or both, from collection well, through the filter.
3. The cell block processing system of claim 1 , further comprising a source of pressurized air that may be selectively placed in communication with the waste chamber interior so as to force air from the waste chamber interior, through the filter, and into the collection well.
4. The cell block processing system of claim 1 , wherein the fluid delivery system comprises an automated arm assembly including a pipette tip holder configured to selectively retrieve, carry, and dispose of pipette tips.
5. The cell block processing system of claim 4 , wherein the automated arm assembly and pipette holder are configured such that a distal end of a pipette tip carried by the pipette holder approaches the collection well at an angle to avoid interfering with operation of the sensor.
6. The cell block processing system of claim 4 , the fluid delivery system further comprising a suction source fluidly coupled to the pipette tip holder, such that an open proximal end of a pipette tip held by the pipette tip holder may be selectively connected to the suction source.
7. The cell block processing system of claim 6 , wherein the suction source comprises a reagent supply line coupled to a syringe pump.
8. The cell block processing system of claim 4 , further comprising
one or more pipette tips, and
a sample vial interface configured for holding a sample vial containing cellular material suspended in a sample fluid,
wherein the automated arm assembly is configured to selectively (i) retrieve a pipette tip, (ii) position the retrieved pipette tip to draw sample fluid from a sample vial seated in the sample vial interface, and (iii) dispense the drawn sample fluid into the collection well.
9. The cell block processing system of claim 4 , further comprising a plurality of liquid reagent sources coupled to the pipette tip holder, wherein the reagents may be selectively dispensed through a pipette tip held by the pipette tip holder and into the collection well under the control of the controller.
10. The cell block processing system of claim 4 , further comprising a source of liquefied paraffin, wherein the automated arm assembly is configured to selectively (i) retrieve a pipette tip, (ii) position the pipette tip to draw liquefied paraffin from the source of liquefied paraffin, and (iii) dispense the drawn liquefied paraffin into the collection well.
11. The cell block processing system of claim 1 , wherein the controller is configured to selectively dispense sample fluid, reagent, and paraffin into the collection well based on one or both of an existing fluid level in the collection well and a prior flow rate across the filter.
12. The cell block processing system of claim 1 , wherein the sensor is configured to be set in a fixed position relative to the cassette interface.
13. The cell block processing system of claim 1 , wherein the automated arm assembly is movable relative to the cassette interface.
14. The cell block processing system of claim 1 , wherein the sensor is an ultrasound sensor.