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Assessment of quality control system by sigma metrics and quality goal index ratio: A roadmap towards preparation for NABL

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World Journal of Methodology 2018年第3期8卷 44-50页

作者： Monica Verma Kiran Dahiya Veena Singh Ghalaut vasudha dhupper Department of Biochemistry Pt. B.D. Sharma University of Health Sciences

AIM To study sigma metrics and quality goal index ratio(QGI). METHODS The retrospective study was conducted at the Clinical Biochemistry Laboratory, PGIMS, Rohtak, which recently became a National Accreditation Board for Testing and Calibration of Laboratories accredited lab as per the International Organization for Standardization 15189:2012 and provides service to a > 1700-bed tertiary care hospital. Data of 16 analytes was extracted over a period of one year from January 2017 to December 2017 for calculation of precision, accuracy, sigma metrics, total error, and QGI. RESULTS The average coefficient of variation ranged from 2.12%(albumin) to 5.42%(creatinine) for level 2 internal quality control and 2%(albumin) to 3.62%(high density lipoprotein-cholesterol) for level 3 internal quality control. Average coefficient of variation of all the parameters was below 5%, reflecting very good precision. The sigma metrics for level 2 indicated that 11(68.5%) of the 16 parameters fall short of meeting Six Sigma quality performance. Of these, five failed to meet minimum sigma quality performance with metrics less than 3, and another six just met minimal acceptable performance with sigma metrics between 3 and 6. For level 3, the data collected indicated eight(50%) of the parameters did not achieve Six Sigma quality performance, out of which three had metrics less than 3, and five had metrics between 3 and 6. QGI ratio indicated that the main problem was inaccuracy in the case of total cholesterol, aspartate transaminase, and alanine transaminase(QGI > 1.2), imprecision in the case of urea(QGI < 0.8), and both imprecision and inaccuracy for *** On the basis of sigma metrics and QGI, it may be concluded that the Clinical Biochemistry Laboratory, PGIMS, Rohtak was able to achieve satisfactory results with world class performance for many analytes one year preceding the accreditation by the National Accreditation Board for Testing and Calibration of Laboratories. As

关键词： Sigma Quality goal index Bias Imprecision Inaccuracy Coefficient of variation

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Implantless patellar fixation in medial patellofemoral ligament reconstruction

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Chinese Journal of Traumatology 2019年第5期22卷 281-285页

作者： Ashish Devgan Umesh Yadav Pankaj Sharma Rajesh Rohilla Radhika Devgan Pravesh Mudgil Aman Verma vasudha dhupper Department of Orthopaedics PG1MSRohtakHaryanaIndia GMERS Medical College SolaAhemdabadGujratIndia Department of Biochemistry PG1MSRohtakIndia

Purpose:The medial patellofemoral ligament(MPFL)acts as primary restraint to lateral patellar dislocation and its rupture has been reported in almost all cases of acute patellar *** surgical techniques have been described for MPFL reconstruction,using many femoral and patellar fixation techniques and different *** article details our technique for MPFL reconstruction using semitendinosus graft which avoids the use of implant at patellar ***:Twenty patients(8 males and 12 females)with complaints regarding acute and chronic lateral patellar instability were evaluated and treated by MPFL reconstruction *** mean age of patients was 21 years(range 17-34 years).MPFL reconstruction was performed using semitendinosus graft passing through two parallel,obliquely directed tunnels created in *** of graft was done with an interference screw only at the femoral *** follow-up period after intervention was 26.4 months(range 23-30 months).Results were evaluated using Kujala ***:All patients gained adequate patellar stability and full arc of *** incidence of patella fracture was *** were no postoperative complications related to the *** was no recurrence of instability in patella at final ***:Passing the graft through the tunnels in patella without use of any implant has given excellent functional outcome and moreover has the advantages of less implant-related complications and cost-effectiveness.

关键词： Patellar dislocation Patellar instability Medial patellofemoral ligament Semitendinosus graft

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