Programmable random access sample handler for use within and automated laboratory system
A method and a device for removing high priority samples from a primary conveyor and transferring such samples directly to an analyzer's sampling location even if other samples have been previously removed from the conveyor and are in a queue to be analyzed.
1. A sample handling buffer for removing a clinical sample carried in a sample carrier on a conveyor and presenting the sample to a sample processing station proximate said conveyor, the buffer comprising:
a sample carrier holder proximate said conveyor and having a number of carrier zones formed therein, said zones sized to accept a sample carrier;
a carrier shuttle having a carrier escapement device adapted to capture a sample carrier on the conveyor, the shuttle being operable to transfer the captured sample carrier into one of the carrier zones; and
an actuator for causing said carousel to place the captured sample carrier proximate said processing station;
wherein said conveyor comprises a pair of parallel tracks and said carrier shuttle is adapted to remove said sample carrier from either of said tracks.
2. The buffer of claim 1 wherein the carrier shuttle is further adapted to transfer a sample carrier from one of the carrier zones back onto the conveyor.
3. The buffer of claim 2 wherein the carrier shuttle is adapted to transfer a sample carrier from one of the carrier zones back onto the conveyor in the same sequence or in a different sequence than the sequence in which the sample carriers were transferred into the carrier zones.
4. The buffer of claim 1 wherein said actuator can cause said carousel to place any of the carrier holding zones proximate said processing station in any sequence, being the same sequence or other than the sequence at which the sample carriers were transferred into the carrier holding zones.
5. The buffer of claim 1 further comprising posts for transferring the captured sample carrier into and out of said processing station.
6. The buffer of claim 1 wherein said carrier shuttle is further adapted to replace and release said sample carrier onto either of said tracks.
7. The buffer of claim 1 wherein said carousel comprises a generally circular, rotatable plate and the carrier zones are formed in the outer circumference thereof.
8. The buffer of claim 1 wherein said sample processing station comprises an analyzer or a pre-analytical sample processing device.
9. A method for removing a clinical sample carried in a sample carrier on a conveyor and presenting the sample to a sample processing station proximate said conveyor, the method comprising:
providing a sample handling buffer comprising a carousel proximate said conveyor and having a number of carrier zones formed therein, said zones sized to accept a sample carrier;
operating a carrier shuttle having a carrier escapement device adapted to capture a sample carrier on the conveyor so as to transfer the captured sample carrier into one of the carrier zones; and
placing the captured sample carrier proximate said processing station;
wherein said conveyor comprises a pair of parallel tracks and said carrier shuttle is adapted to remove said sample carrier from either of said tracks.
10. The method of claim 9 wherein the carrier shuttle is further adapted to transfer a sample carrier from one of the carrier zones back onto the conveyor.
11. The method of claim 9 wherein said placing the captured sample carrier proximate said processing station comprises placing any of the carrier zones proximate said processing station in the same sequence or in a sequence other than the sequence in which the sample carriers were originally transferred into the carrier holding zones.