Quality Assurance in Haematology 3.57.51 PM

Quality Assurance in Haematology 3.57.51 PM - Quality...

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Quality Assurance in Quality Assurance in Haematology Haematology
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Introduction QA is the sum of all those activities in which the laboratory is engaged to ensure that information generated by laboratory is correct. QA is not restricted to the development and retention of quality control charts but rather includes all aspects of laboratory activities that affects the results produced, from the choice of methods, to the education of personnel, to the handling of specimens and reporting results. The real purpose of QA activities is to determine how correct or incorrect the results emanating from the lab are, and to allow those managing the lab to determine whether or not the lab is fulfilling its functions satisfactorily.
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Introduction – cont’ 3 major activities of QA : 1 ) Preventive – those activities that are done prior to the examination of the specimen or sample and that are intended to establish systems conducive to accuracy in analytical testing ( eg : preventive maintenance and calibration of instruments, testing of media, orientation and training of personnel )
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Introduction – cont’ 2 ) Assessment – those activities that are done during testing to determine whether the test systems are performing correctly ( eg : the use of standard and controls, maintenance of control charts ) 3 ) Corrective – those activities that are done, when error is detected, to correct the system ( eg : equipment troubleshooting, recalibration of instruments )
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QA in Haematology Laboratory QA in haematology lab is intended to ensure the reliability of the lab tests. The objective is to achieve precision and accuracy 4 components of QA programme : 1 ) Internal Quality Control ( IQC ) 2 ) External Quality Control ( EQC ) 3 ) Standardization 4 ) Proficiency surveillance
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Accuracy - the closeness of the estimated value to the true mean - can be checked by the use of reference materials which have been assayed by independent methods of known precision Precision - reproducibility of a results, whether accurate or inaccurate within a define frame time ( eg: within the same day, from week to week etc ) - can be controlled by replicate tests, check tests on previously measured specimens and statistical evaluation of results
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Internal Quality Control ( IQC ) based on monitoring the haematology tests procedures that are performed in the lab includes measurements on specially prepared materials, and repeated measurements on routine specimens, statistical analysis and day by day data obtained from the tests which have been routinely carried out is intended to ensure that there is continual evaluation of the reliability of the work of the lab and that control is exercised over the release of the results it is primarily a check of precision but not necessarily accuracy
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This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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Quality Assurance in Haematology 3.57.51 PM - Quality...

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