Evaluation of the Coulter Counter® model S-Plus IV

C. J. Cox, T. M. Habermann, B. A. Payne, G. G. Klee, R. V. Pierre

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


Evaluation of linearity, carry-over, precision, and accuracy of a Coulter Counter model S-Plus IV prototype showed that they meet the manufacturer's specifications. The instrument also was compared with an earlier model. Correlations of the lymphocyte and granulocyte values in the three-part differential count with manual eye-count and a Technicon® Hemalog D90 results were very close to the correlation of eye-count to Hemalog D90 results. The percentage of mononuclear cells showed acceptable correlation to the manual eye-count when monocytes were combined with blasts, eosinophils, and basophils. The medical effectiveness of the three-part differential was determined by comparison with manual eye-counts in 1,084 samples. The false positive and false negative values were 7.38% and 7.84%, respectively. The instrument has acceptable limits of operation. When combined with analysis of histograms by trained personnel, the three-part differential count is capable of screening for abnormalities that require further analysis.

Original languageEnglish (US)
Pages (from-to)297-306
Number of pages10
JournalAmerican journal of clinical pathology
Issue number3
StatePublished - 1985

ASJC Scopus subject areas

  • Pathology and Forensic Medicine


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