delta check

del·ta check

a comparison of consecutive values for a given test in a patient's laboratory file used to detect abrupt changes, usually generated as a part of computer-based quality control programs.
Synonym(s): Δ check
A technique for quality control of clinical specimens, in which a patient’s results are compared to previous results; if the differences are significant, then the newer specimen is ‘flagged,’ indicating to the bench technologist a need to examine the specimen for potential misdraw, instrument error, etc.

del·ta check

(del'tă chek)
A comparison of consecutive values for a given test in a patient's laboratory file used to detect abrupt changes, usually generated as a part of computer-based quality control programs.
References in periodicals archive ?
The delta check is a measurement of the difference between a patient's sequential test results.
Our laboratory had long used a delta check of the MCV value in patients' CBCs to suggest the possibility of a specimen error, including misidentification.
Therefore, much has been done to try to prevent it, and several result verification methods, such as delta check (1) and multivariate delta check (2), have been developed to detect it.
Regarding specimens found to be improperly labeled, most (73.6%) were detected by laboratory review ("lab check"), 9.9% by feedback from caregiver, and 9.1% by delta check (see Table 1).
These were combinations of two different tests (e.g., hemoglobin and mean corpuscular volume) as well as combinations of a test result with its previous historical result (delta check).
Munoz (2) reported on the practices of 340 laboratories for repeating critical values and delta check values, from a 2007 survey.
Delta check violations should be investigated before reporting the current value.
We picked up the error when a delta check was done on one of the patients when a follow-up lab was ordered.
Initially, a delta check is performed at the CBC workstation.
* Result integrity problems (such as delta check failures)
Sophistication in the lab has created delta checks that allow technology to cross-reference a patient's results.