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IP Journal of Diagnostic Pathology and Oncology

Impact of intervention on various quality indicators (turn around time and six sigma) in hematology laboratory

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Author Details : Shanmugasamy K*, Anandraj Vaithy, Venkat Ragavan, Sowmya S, Sumaty S

Volume : 5, Issue : 1, Year : 2020

Article Page : 63-68

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Introduction: The laboratory Turn Around Time(TAT) can be defined differently according to the test
type (stat vs. routine), analyte, and institution. It is commonly defined as the time from when a test is
ordered until the result is reported. The total TAT for laboratory assays includes the entire interval from
ordering of the test to the clinician’s awareness of the result (i.e., “brain-to-brain”). Six Sigma has been
characterized as the latest management fad to repackage old quality management principles, practices, and
tools/techniques. Sigma methodology can be applied wherever an outcome of a process is be measured.
A poor outcome is counted as an error or defect, which is quantified as Defects Per Million (DPM). Six
Sigma is a methodology targeting zero error (3.4 errors per million events).
Materials and Methods: Samples received in the haematology laboratory are processed in 8 part
haematologyAutoanalyser. Results are reported as per routine procedure in the lab. Turn Around Time
(TAT) for complete blood count parameters are calculated for one month. The standard Turn Around Time
for the complete blood counts are 4 hours. Sigma value is calculated for complete blood count parameters
for one month using the formula Sigma (s ) = [TEa - bias)/CV]. Six sigma is calculated by Defects Per
Million (DPM). Reduce the error rate by guiding the laboratory technician on analytical part of sample
processing and value for the same parameters. Repeat the Turn Around Time and Six sigma value after
training for one month and compare the error rate.

Keywords: Quality indicators, Turn Around Time, Six sigma, Quality management.

Doi : 10.18231/j.jdpo.2020.013

How to cite : Shanmugasamy K, Vaithy A , Ragavan V, Sowmya S, Sumaty S, Impact of intervention on various quality indicators (turn around time and six sigma) in hematology laboratory. IP J Diagn Pathol Oncol 2020;5(1):63-68

Copyright © 2020 by author(s) and IP J Diagn Pathol Oncol. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0) (