External quality assessment.pptx

External quality assessment  E.Q.A A system for objectively checking the laboratory’s performance using an external agency or facility  EQA Methods Proficiency testing Re testing Re-cchecking On – site evaluation  External Quality Assessment (EQA)...

External quality assessment  E.Q.A A system for objectively checking the laboratory’s performance using an external agency or facility  EQA Methods Proficiency testing Re testing Re-cchecking On – site evaluation  External Quality Assessment (EQA) comparison among different test sites early warning for systemic problems objective evidence of testing quality areas that need improvement training needs  EQA important for improvement a measure of laboratory performance  Proficiency Testing “Proficiency testing schemes (PTS) are interlaboratory comparisons that are organized regularly to assess the performance of analytical laboratories and the competence of the analytical personnel.”  PT organization /provider Laboratory Analyze Evaluation PT performance report Returnresults PT Process PT samples sent regularly ReceivePT report Corrective Actions  Rechecking samples must be collected randomly avoid systematic sampling bias statistically significant resolve discrepancies effective feedback  Retesting tested by reference laboratory performed on dried blood spots or serum not blinded statistically significant  On-site Evaluation to obtain a realistic picture of laboratory practices to provide assistance with problem areas  EQA EQA requaired by ISO 15189