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 ?
Multivariate delta check method for detecting specimen mix-up.
These detection schemes, referred to as limit checks and delta checks, respectively, are in common use.
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.
Delta check violations should be investigated before reporting the current value.
Delta checks for random error detection in hematology tests.
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.
Recently, such delta checks helped CCH identify hemolytic uremic syndrome (Ecoli 0157) in a child admitted to the emergency room.
Our lab computer reports delta checks - significant changes in consecutive lab values for individuals - to the instrument operators at the time of analyses.
Analysis encompasses such classic QC measures as controls, duplicate runs, instrument checks, and delta checks of previous results.