Device for spreading or colouring and determining a sedimentation rate

A device for spreading or colouring and determining a sedimentation rate, comprising a first group arranged so as to sample a blood sample from a tube and to carry out a smear test on the sample,

• a second group arranged so as to sample a blood sample from a tube and to carry out a sedimentation rate determination,
• at least one sampling member which controllable for an operation by the first group and an operation by the second group for sampling a blood sample so that a sample sampled for the first group is not used by the second group, and that a sample sampled for the second group is not used by the first group, the second group being provided with a sensor comprising an infrared light source and an optical sensor arranged substantially opposite one another around a tube connected to an output end of the at least one sampling member so that the light emitted by the infrared light source reaches the optical sensor after having crossed said tube, the second group being further arranged so as to carry out a rinsing of the sampling member and of the tube between two sedimentation rate measurement determinations and the optical sensor being arranged so as to carry out a blank measurement after a rinsing operation, and
• a converter arranged so as to receive a blank measurement and one or more light transmission measurements from the optical sensor and to determine a sedimentation rate from the ratio between the blank measurement and the light transmission measurements.