A device for dried blood microsampling in quantitative bioanalysis: overcoming the issues associated blood hematocrit.

Aims: A cross-laboratory experiment has been performed on a novel dried blood sampler in order to investigate whether it overcomes issues associated with blood volume and hematocrit (HCT) that are observed when taking a subpunch from dried blood spot samples.

Materials & Methods: An average blood volume of 10.6 μl was absorbed by the samplers across the different HCTs investigated (20-65%).

Results: No notable change of volume absorbed was noted across the HCT range. Furthermore, the variation in blood sample volumes across six different laboratories was within acceptable limits.

Conclusion: The novel volumetric absorptive microsampling device has the potential to deliver the advantages of dried blood spot sampling while overcoming some of the issues associated with the technology.