Objectives: To assess the Architect i2000 for measuring TSH from neonatal blood spots.
Methods: Blood collected on filter paper was eluted and assayed on the Architect.
Results: Recovery of TSH was close to 100%. Within-run and between-run precisions were 4.2-8.2% and 14.5-18.1%. Correlation with the Wallac Delphia method was excellent (r = 0.96). Linearity, sensitivity, and slope were 0-400 mU/l, 0.15 mU/l, and 0.86, respectively. The results obtained by this method on the Architect allowed us to differentiate normals from affected patients with the same reliability as the previous method.
Conclusions: Measurement of TSH on the Architect is an excellent method for detecting congenital hypothyroidism.