Letters

WHO haemoglobin colour scale is modern version of what was used previously

BMJ 1998; 317 doi: https://doi.org/10.1136/bmj.317.7163.949 (Published 03 October 1998) Cite this as: BMJ 1998;317:949
  1. S M Lewis, Director
  1. WHO Collaborating Centre for Haematology Technology, Department of Haematology, Imperial College School of Medicine, Hammersmith Hospital, London W12 0NN

    EDITOR—Minerva recently drew attention to the World Health Organisation haemoglobin colour scale for near patient determination of haemoglobin concentrations. 12 This apparently elicited response from “a lot of elderly readers” who suggested that it is simply a reinvention of the old Hawksley colour scale. It is, in fact, based on the even earlier “blotting paper” method, which was developed by the …

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