Application of Sigma Metrics for the Assessment of Quality Assurance in Clinical Biochemistry Laboratory in India: A Pilot Study |
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| Authors: | Bhawna Singh Binita Goswami Vinod Kumar Gupta Ranjna Chawla Venkatesan Mallika |
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| Institution: | (1) Department of Biochemistry, GB Pant Hospital, Room No 418, Fourth Floor, New Delhi, India |
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| Abstract: | Ensuring quality of laboratory services is the need of the hour in the field of health care. Keeping in mind the revolution
ushered by six sigma concept in corporate world, health care sector may reap the benefits of the same. Six sigma provides
a general methodology to describe performance on sigma scale. We aimed to gauge our laboratory performance by sigma metrics.
Internal quality control (QC) data was analyzed retrospectively over a period of 6 months from July 2009 to December 2009.
Laboratory mean, standard deviation and coefficient of variation were calculated for all the parameters. Sigma was calculated
for both the levels of internal QC. Satisfactory sigma values (>6) were elicited for creatinine, triglycerides, SGOT, CPK-Total
and Amylase. Blood urea performed poorly on the sigma scale with sigma <3. The findings of our exercise emphasize the need
for detailed evaluation and adoption of ameliorative measures in order to effectuate six sigma standards for all the analytical
processes. |
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| Keywords: | Six sigma Coefficient of variation Total allowable error Bias Quality control |
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