Flow cytometer system with unclogging feature
First Claim
1. A fluidic system for unclogging a flow channel of a flow cytometer including an interrogation zone and a system fluid with a pressure and a flow rate, the fluidic system comprising:
- a sheath pump adapted to pump the system fluid from a sheath container into the interrogation zone;
a waste pump adapted to pump the system fluid from the interrogation zone into a waste container;
a motor with motor controls coupled to at least one of the pumps of the fluidic system;
a clog detector that automatically detects clogs in the flow channel; and
a controller connected to the motor and the clog detector and configured to vary the pumping rate of at least one of the pumps of the fluidic system to vary the flow rate of the system fluid and induce a commensurate change in the pressure of the system fluid to create pulsations within the system fluid in response to detection of a clog that provides to unclog the flow channel of the flow cytometer, wherein the controller is configured to create pulsations that have a pulsation pressure that is at least five time greater than the pressure of the system fluid.
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Accused Products
Abstract
The fluidic system with an unclogging feature of the preferred embodiment includes a flow channel, a sheath pump to pump sheath fluid from a sheath container into an interrogation zone, and a waste pump to pump waste fluid from the interrogation zone into a waste container. The sheath pump and/or the waste pump draw sample fluid from a sample container into the interrogation zone. The fluidic system also includes a controller to adjust the flow rate of the sample fluid from the sample container into the interrogation zone. The pump and controller cooperate to propagate a pulsation through the flow channel from the pump if the flow channel is clogged. The fluidic system is preferably incorporated into a flow cytometer with a flow cell that includes the interrogation zone.
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Citations
22 Claims
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1. A fluidic system for unclogging a flow channel of a flow cytometer including an interrogation zone and a system fluid with a pressure and a flow rate, the fluidic system comprising:
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a sheath pump adapted to pump the system fluid from a sheath container into the interrogation zone; a waste pump adapted to pump the system fluid from the interrogation zone into a waste container; a motor with motor controls coupled to at least one of the pumps of the fluidic system; a clog detector that automatically detects clogs in the flow channel; and a controller connected to the motor and the clog detector and configured to vary the pumping rate of at least one of the pumps of the fluidic system to vary the flow rate of the system fluid and induce a commensurate change in the pressure of the system fluid to create pulsations within the system fluid in response to detection of a clog that provides to unclog the flow channel of the flow cytometer, wherein the controller is configured to create pulsations that have a pulsation pressure that is at least five time greater than the pressure of the system fluid. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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4. A fluidic system for unclogging a flow channel of a flow cytometer including an interrogation zone and a system fluid with a pressure and a flow rate, the fluidic system comprising:
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a sheath pump adapted to pump the system fluid from a sheath container into the interrogation zone; a waste pump adapted to pump the system fluid from the interrogation zone into a waste container; a motor with motor controls coupled to at least one of the pumps of the fluidic system; a drawtube that conveys a sample fluid from a sample container into the interrogation zone; a pressure sensor that automatically detects clogs in the flow channel by measuring a pressure of the system fluid, wherein the pressure sensor measures a pressure differential between the top of the drawtube and the bottom of the drawtube, and a controller connected to the motor and the pressure sensor and configured to vary the pumping rate of at least one of the pumps of the fluidic system to vary the flow rate of the system fluid and induce a commensurate change in the pressure of the system fluid to create pulsations within the system fluid in response to detection of a clog that provides to unclog the flow channel of the flow cytometer. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification