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.
In an analysis of simulated delta check rule performance, Strathmann and colleagues (6) found that the mean red blood cell volume (MCV) had the highest positive predictive value and the fewest false positives.
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.
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.
Delta check limits that have been recommended for sodium are 5% and 10 mmol/L.
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.
Protocols for rerun criteria, delta checks, reflex testing, and sample flagging can be automated.
These detection schemes, referred to as limit checks and delta checks, respectively, are in common use.
Other examples include the use of delta checks, limit checks, and monitoring of the mean value calculated from patient test results.