Systems and methods for diagnosing a fluidics system and determining data processing settings for a flow cytometer

Patent metadata

Field	Value
Publication number	US-10001434-B2
Application number	US-201514612820-A
Country	US
Kind code	B2
Filing date	Feb 3, 2015
Priority date	Mar 6, 2014
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

The present set of embodiments relates to systems and methods for diagnosing a fluidics system and determining data processing settings for a flow cytometer. Systems and methods for diagnosing a fluidics system require accurate measurement and interpretation of fluctuations within the fluid delivery system. Systems and methods for determining data processing settings require an accurate measurement of peak times among various channels and being able to adjust time delay settings wherein peak time is the measurement of time elapsed from the beginning of the data collection time window to the highest peak in the window.

First claim

What is claimed is:

1. A method for determining data processing settings for a flow cytometer comprising:
passing a set of calibration particles through a flow cell;
illuminating each of the set of calibration particles passing through the flow cell with at least two light beams wherein each light beam is associated with a channel;
collecting light emitted from each of the set of calibration particles using a detector associated with each channel;
recording data from each detector;
setting a trigger channel to initiate a transfer of data from a first data collection time window associated with the trigger channel when a data signal threshold for the trigger channel is exceeded;
setting a second channel to transfer data from a second data collection time window associated with the second channel when the data signal threshold for the trigger channel is exceeded, and wherein the start of the second data collection time window is based on a spatial path between the trigger channel and the second channel;
recording data from the first data collection time window to a data store each time the data signal threshold is exceeded;
recording data from the second data collection time window to the data store each time the data signal threshold for the trigger channel is exceeded;
analyzing a distribution of data intensity peak times within the second data collection time window; and
calculating a time delay based on the distribution of data intensity peak times in the second data collection time window to modify the size of, to shift, or to modify the size of and shift the second data collection time window.

2. The method in claim 1 , wherein the light emitted is fluorescent.

3. The method of claim 1 , wherein the light emitted is scattered.

4. The method in claim 1 , wherein the start of the second data collection time window is based on a flow rate.

5. The method in claim 1 , wherein the start of the second data collection time window is based on a sheath fluid flow rate.

6. The method in claim 1 , wherein the spatial path is between about 80 to 250 micrometers.

7. The method in claim 1 , wherein the spatial path is about 150 micrometers.

8. The method in claim 1 , wherein the data collection time windows are between about 80 to about 120 ADC points wide.

9. The method in claim 1 , wherein the data collection time windows are between about 320 to about 360 ADC points wide.

10. A system to determine data processing settings for a flow cytometer comprising:
a flow cell configured to flow calibration particles;
at least two light sources each configured to emit a light beam, wherein each light beam is associated with a channel and, wherein the light beams pass through the flow cell;
a detector associated with each channel wherein each detector is configured to collect light emitted from each of the set of calibration beads;
a memory buffer configured to record data from each of the detectors;
a trigger channel configured to initiate a transfer of data from a first data collection time window associated with the trigger channel when a data signal threshold for the trigger channel is exceeded;
a second channel configured to transfer data from a second data collection time window associated with the second channel when the data signal threshold for the trigger channel is exceeded wherein the start of the second data collection time window is based on a spatial path between the trigger channel and second channel;
a trigger processor configured to:
transfer the data from the first data collection time window to a data storage each time the data signal intensity threshold is exceeded; and
transfer the data from the second data collection time window to the data storage each time the data signal intensity threshold is exceeded;
a computer processor configured analyze a distribution of data intensity peak times within the second data collection time window and calculate a time delay based on the distribution of data intensity peak times in the second data collection time window to modify the size of, to shift, or to modify the size of and shift the second data collection time window.

11. The system in claim 10 , further comprising a field programmable gate array wherein the memory buffer and the trigger processor are subcomponents of a field programmable gate array.

12. The system in claim 10 , wherein the light emitted is fluorescent.

13. The system of claim 10 , wherein the light emitted is scattered.

14. The system in claim 10 , wherein the start of the second data collection time window is based on a flow rate.

15. The system in claim 10 , wherein the start of the second data collection time window is based on a sheath fluid flow rate.

16. The system in claim 10 , wherein the spatial path is between about 80 to 250 micrometers.

17. The system in claim 10 , wherein the spatial path is about 150 micrometers.

18. The system in claim 10 , wherein the data collection time windows are between about 80 to about 120 ADC points wide.

19. The system in claim 10 , wherein the data collection time windows are between about 320 to about 360 ADC points wide.

Assignees

• Life Technologies Corp

Inventors

• Kaduchak Gregory
• Akerlund Jace
• Malkin Jason
• Ward Michael

Classifications

• G01N2015/1438

  Using two lasers in succession · CPC title

• G01N15/1429

  Signal processing · CPC title

• G01N15/1459

  the analysis being performed on a sample stream · CPC title

• G01N15/1012 Primary

  Calibrating particle analysers; References therefor · CPC title

• G01N15/1434

  Optical arrangements · CPC title