Methods, systems, and apparatus to determine a clot carryout condition upon probe retraction during sample aspiration and dispensing

摘要

A method of determining a condition of clot carryout from a sample container containing a sample fluid is disclosed. During aspiration of a fluid sample (e.g., blood), a level sensor, such as a capacitance sensor, is used to measure ascending and descending liquid level readings. A difference between the ascending and descending liquid level readings may be compared to a predetermined threshold. Non-ideal conditions, such as a clot carryout condition wherein a clot is carried out of the sample container on the exterior surface of the probe may be detected thereby. Systems and apparatus for carrying out the method are provided, as are other aspects.

主权项

1. A method for detecting clots during aspiration and dispensing of sample fluid, comprising:
descending a sample probe into a sample container containing the sample fluid; measuring a first level reading during the descending; ascending the sample probe; aspirating at least a portion of the sample fluid, and detecting a presence of a clot condition in an inner passage of the sample probe; measuring a second level reading during the ascending; and determining a clot carryout condition on an exterior of the probe based upon the first level reading and the second level reading wherein upon determining the clot carryout condition exists, the ascending movement of the sample probe is stopped to prevent contamination by preventing a clot from leaving the confines of the sample container.