Field assessment of the operating procedures of a semi-quantitative G6PD Biosensor to improve repeatability of routine testing
Sadhewa et al.
The finding, in our words
This study evaluated the repeatability of a point-of-care G6PD test using capillary blood collected via fingerprick and BD Microtainers, finding that modified sample application methods reduced variability in laboratory and field settings.
A paraphrase to the Library’s standard, never the abstract. The source is one link away and is always the authority.
Although most kidney transplant recipients successfully collected capillary blood samples at home, haemolysis and transport conditions affected analyte stability. Agreement with venous sampling was acceptable for haemoglobin and creatinine, but potassium and haematocrit exceeded total allowable error limits.
Hoekstra et al., Clinical chemistry and laboratory medicine (paywalled) · source ↗
A head-to-head of four upper-arm capillary devices, including TAP Micro Select, versus fingerstick and venous: experience and performance varied by device with none clearly superior, while analyte correlations with venous were similar across all.
Collier et al., Bioanalysis (paywalled) · source ↗
A vacuum-assisted upper-arm device collected a mean 538 µL and met the volume target in 85.5% of cases; 17 of 19 analytes met CLIA agreement with venous, with pain lower than fingerstick.
A study of decentralised patient-centric microsampling found that 82% of untrained participants, 47 of 57, successfully self-collected acceptable fingerstick blood in Microtainer tubes. All 46 tested samples yielded accurate HIV viral suppression results compared to venipuncture, though this remote monitoring approach is limited to US courier services and temperature conditions.
Johnson et al., AIDS research and therapy · source ↗
A prospective study of 109 subjects found that 250 μl capillary whole blood microsampling is stable for five hours in a microtainer. This patient-centric, decentralised method successfully detected most HCV genotypes at defined limits using the Xpert HCV test on the GeneXpert Xpress system and the cobas HCV platform.