External Quality Assessment Scheme Survey no. 237/238 Immunohematology (automats) January INSTAND e.v.

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1 Report on External Quality Assessment Scheme Survey no. 237/238 Immunohematology (automats) January 2015 INSTAND e.v. Priv. Doz. Dr. Franz Wagner issued by: Instand e.v. Gesellschaft zur Förderung der Qualitätssicherung in medizinischen Laboratorien e.v. Düsseldorf,

2 EQA scheme consultant Priv. Doz. Dr. Franz Wagner Blutspendedienst NSTOB Eldagsener Str. 38 D Springe Tel. +49 (0) Fax +49 (0) fwagner@bsd nstob.de Assistant EQA scheme consultant DRK Blutspendedienst Baden Württemberg/Hessen Sandhofstr. 1 D Frankfurt/M. Tel. +49 (0) c.geisen@blutspende.de Reference and Targetvalue Laboratories: Dr. Ulla Bauerfeind Institut für Transfusionsmedizin Kliniken der Stadt Köln Krankenhaus Merheim Ostmerheimer Str Köln Merheim Prof. Dr. med. Walter Hitzler Transfusionszentrale Johannes Gutenberg Universität Mainz Hochhaus Augustusplatz Mainz Dr. Albrecht Leo Institut für Klinische Transfusionsmedizin und Zelltherapie Heidelberg ggmbh Im Neuenheimer Feld Heidelberg Herr Hein Hustinx BSD SRK BERN AG Labordiagnostik Murtenstrasse 133 CH 3008 Bern DRK Blutspendedienst Baden Württemberg Hessen ggmbh Institut für Transfusionsmedizin und Immunhämatologie Sandhofstr Frankfurt Organisation and Logistics: INSTAND e.v. Ubierstr Düsseldorf Tel. +49 (0) Fax +49 (0) instand@instand ev.de ev.de Report on Instand e.v. EQAS 237 / 238 January of 5

3 Further Information In the following sections you can obtain more information about the EQA scheme, in addition to the documents sent by post. Certificate The certificate lists those analyses for which the requirements of the collaborative study are met. A confirmation of participation will be issued for each analyte with which you have participated in the EQAS. Validity of the certificates Certificates are valid for 6 months starting at the closing date of the EQA. This date is printed on top of the certificates. The printing or delivery date has no effect on the period of validity. Parameters listed in the policy B2 of the German Medical Association are indicated by a (R*). Individual results Here we specify your reported value for each analysis, as well as the applicable target value. This information is given line by line for each sample analyzed. Additionally displays a "+" that the correct results for all samples were reported, a " " indicates that at least one sample has been submitted with an incorrect result. In the lower section you can find the information about the results of the antibody differentiation and titer determination. Report on Instand e.v. EQAS 237 / 238 January of 5

4 Dispatched samples This EQA scheme included two samples of EDTA blood stabilized at a hematocrit of 22%. For the calculation of antibody titers, two additional samples with antibody diluted serum were sent out. Target values The target values are determined by the findings of the setpoint laboratories listed above. These laboratories represent a mix of university, state, municipal and regional blood transfusion services and cover the full spectrum of imunohematological oriented laboratories. The depreciation areas have been defined as follows: Sample 1 Code Sample 2 Code AB0 grouping A (1) 0 (3) Rh factor D positive (1) positive (1) A subgroup A 1 (1) Rh typing CcD.ee (1255) ccd.ee (2255) antibody screening detectable (1) detectable (1) Coombs testing (direct) negative (2) negative (2) Kell antigen not detectable (2) not detectable (2) Antibody screening and identification Antibody titer quotient Antibody screening and identification Antibody titer quotient Sample 1 Code Sample 3/1 Sample 2 Code Sample 4/2 1. Antib. Anti Fy(b) (68) 1 (0,5 2) Anti C (52) 2 (1 4) 2. Antib. Auto Anti D (not relevant for evaluation) Anti E (55) 1 (0,5 2) Report on Instand e.v. EQAS 237 / 238 January of 5

5 Annotation of the EQA scheme adviser Sample 11 contained difficult antibodies: anti Fy(b) with traces of an auto anti D detectable only in enzyme technique. Nevertheless, the results were excellent. Interestingly, some participants reported anti Fy(a) instead of anti Fy(b). Possibly, these errors were due to transcription. Report on Instand e.v. EQAS 237 / 238 January of 5