Capillary blood samples can be taken by patients from their own finger without requiring a healthcare professional to take a blood sample. Samples taken this way can be posted from home. This crucially avoids visits to the clinic or hospital to have blood samples taken. It would reduce the burden on healthcare professionals and is often preferred by patients. It is important to demonstrate that the results of an analysis performed on capillary blood samples are equivalent to the analysis of a standard venous sample.
This study aims to collect, in parallel to a standard venous blood sample, a capillary blood sample taken by the participant which is then added to specially designed filter paper (dried plasma spot sample) or other collection devices. Parallel analysis of paired samples will then allow the investigators to assess if results measured in samples taken using the two methods are similar.
The investigators will recruit 40 participants for each collection device to this study. It is important to obtain a range of positive and negative results from the study participants, and from stored samples and quality control material.
