Refractix DSP and TS Meter-DSP Measurement Comparison

The goal of this clinical trial is to compare the serum plasma measurement results between the FDA cleared TS Meter-DSP and investigational Refractix DSP. Study participants will be individuals being screened for plasma donation in a plasmaphereris center. The main question the study aims to answer is whether the measurement taken on the investigational Refractix DSP device is equivalent, defined as within +/- 0.3g/100ml, of the measurement taken on the TS Meter-DSP. Participants will be asked to provide a second capillary tube of blood (<0.085ml) from the fingerstick that is part of their routine pre-screening for plasma donation.

Inclusion Criteria:Subjects must be between the ages of 18 and 90 years oldSubjects must be able and willing to provide signed informed consentSubjects must be able to follow study instructionsExclusion Criteria:Insufficient amount of plasma sample for use on either device in the study.Plasma samples of with total protein measurements outside of the 6.0 g/100ml to 9.0 g/100ml range will be excluded from the data analysis.