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The use of CellaVision competency software for external quality assessment and continuing professional development
  1. Yuki Horiuchi1,
  2. Yoko Tabe1,
  3. Mayumi Idei1,
  4. Hans-Inge Bengtsson2,
  5. Kiyoshi Ishii3,
  6. Takashi Horii3,
  7. Kazunori Miyake1,
  8. Naotake Satoh4,
  9. Takashi Miida1,
  10. Akimichi Ohsaka3
  1. 1Department of Clinical Laboratory Medicine, Juntendo University School of Medicine, Bunkyo-ku, Tokyo, Japan
  2. 2CellaVision AB, Ideon Science Park, Lund, Sweden
  3. 3Division of Clinical Laboratory, Juntendo University Hospital, Bunkyo-ku, Tokyo, Japan
  4. 4Division of Clinical Laboratory, Juntendo Tokyo Koto Geriatric Medical Center, Koyo-ku, Tokyo, Japan
  1. Correspondence to Yoko Tabe, Department of Clinical Laboratory Medicine, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo 113-8421, Japan; tabe{at}


Aims Quality assessment of blood cell morphological testing, such as white blood cell (WBC) differential and its interpretation, is one of the most important and difficult assignments in haematology laboratories. A monthly survey was performed to assess the possible role of the proficiency testing program produced by CellaVision competency software (CCS) in external quality assessment (EQA) of the clinical laboratories of affiliated university hospitals and the effective utilisation of this program in continuing professional development (CPD).

Methods Four monthly proficiency surveys were conducted in collaboration with four clinical laboratories affiliated with the teaching hospitals of Juntendo University of Medicine in Japan.

Results EQA results by the CCS proficiency testing program revealed a difference of performance levels of WBC differential and morphological interpretation and a discrepancy in the WBC differential criteria among laboratories. With regard to the utilisation of this proficiency program as a tool for CPD, this program successfully improved the performance of the low-scoring laboratories and less experienced individuals.

Conclusions The CCS proficiency testing program was useful for the quality assessment of laboratory performance, for education, and for the storage and distribution of cell images to be utilised for further standardisation and education.

  • CellaVision competency software (CCS)
  • continuing professional development (CPD)
  • external quality assessment (EQA)
  • haematology
  • laboratory management
  • laboratory tests
  • leucocytes
  • morphology
  • white blood cell differential

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  • Funding This work was supported by a grant from the clinical laboratory quality control foundation (to YT).

  • Competing interests None to declare.

  • Ethics approval This study was conducted with the approval of the Juntendo Clinic Institutional Review Board.

  • Provenance and peer review Not commissioned; externally peer reviewed.