Quality assurance in clinical chemistry laboratories in the UK

1999 ◽  
Vol 4 (1-2) ◽  
pp. 18-26 ◽  
Author(s):  
Keith W. Davies
Keyword(s):  
Quality Assurance ◽  
Clinical Chemistry ◽  
Chemistry Laboratories ◽  
The Uk

scholarly journals Between-Country Comparability of Clinical Chemistry Results: An International Quality Assessment Survey of 17 Analytes in Six European Countries through Existing National Schemes

1993 ◽  
Vol 30 (3) ◽  
pp. 304-314 ◽  
Author(s):  
R T P Jansen ◽  
D G Bullock ◽  
A Vassault ◽  
H Baadenhuijsen ◽  
A De Leenheer ◽  
...  
Keyword(s):  
The Netherlands ◽  
Quality Assessment ◽  
Mutual Recognition ◽  
Clinical Chemistry ◽  
Reference Method ◽  
European Countries ◽  
Mean Values ◽  
Related Data ◽  
Standard Deviations ◽  
The Uk

Two lyophilized control sera were distributed through seven national external quality assessment schemes in six European countries—Belgium, Switzerland, France, The Netherlands, Sweden and the United Kingdom—participated in the study. The results for 17 routine analytes were obtained from almost 5000 laboratories for the two sera. The organizers of the schemes were asked to process the results according to a common outlier removal procedure, and submit method-related data if available. The two sera were also distributed through the external/internal scheme of The Netherlands, and the within-laboratory standard deviations calculated in this scheme have been used in a scaling procedure for the external mean values and between-laboratory standard deviations of the participating countries. The results show remarkable agreement in the national mean values for practically all analytes, but considerable differences in the between-laboratory variation. Data from comparable method groups was obtained for 12 analytes from Belgium, France, The Netherlands and the UK. Though revealing some specific differences between methods and countries, the method-related data are generally in agreement with the all-method data. In this study reference method values were only available for cholesterol. The high degree of agreement found suggests, however, that mutual recognition of all-method mean values in national schemes could be acceptable, especially for analytes for which reliable reference methods are not available. The major element of variation is between-laboratory rather than between-country.

Experience in the netherlands with an external quality control and scoring system for clinical chemistry laboratories

1977 ◽  
Vol 74 (3) ◽  
pp. 191-201 ◽  
Author(s):  
A.P. Jansen ◽  
E.J. Van Kampen ◽  
B. Leijnse ◽  
C.A.M. Meijers ◽  
P.J.J. Van Munster
Keyword(s):  
Quality Control ◽  
The Netherlands ◽  
Scoring System ◽  
Clinical Chemistry ◽  
External Quality Control ◽  
External Quality ◽  
Chemistry Laboratories

Variation in dose distribution for breast radiotherapy: a trial based quality assurance programme in the UK

1999 ◽  
Vol 35 ◽  
pp. S100
Author(s):  
A. Deighton ◽  
E.A. Winfield ◽  
K. Venables ◽  
E.G.A. Aird ◽  
P.J. Hoskin
Keyword(s):  
Quality Assurance ◽  
Dose Distribution ◽  
Breast Radiotherapy ◽  
Quality Assurance Programme ◽  
The Uk

scholarly journals Using Shewhart p control charts of external quality-assurance program data to monitor analytical performance of a clinical chemistry laboratory

1996 ◽  
Vol 42 (9) ◽  
pp. 1478-1482 ◽  
Author(s):  
D Chesher ◽  
L Burnett
Keyword(s):  
Quality Assurance ◽  
Control Charts ◽  
Clinical Chemistry ◽  
Analytical Performance ◽  
External Quality Assurance ◽  
Chemistry Laboratory ◽  
Quality Assurance Program ◽  
External Quality ◽  
Simple Method

Abstract We have investigated the application of Shewhart's p control charts in our external quality-assurance program to monitor the long-term performance of our laboratory's analytical quality. The p control charts have been able to detect long-term changes in our laboratory's analytical performance that would have been difficult to detect by more-conventional techniques. We have explored methods for interpreting these charts as well as some of their limitations, which include minimum subgroup size and dependence on constant specification limits. These charts may be not only a simple method for the long-term monitoring of analytical performance of a laboratory, but also of use to the organizers of external quality-assurance programs.

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