Abstract
An immunoradiometric two-site assay for thyrotrophin (TSH) in dried blood filter paper spots is described. The assay is automated by means of the Kemtek 3000 automated immunoassay system. The technique uses a 6.0 mm disc punched from the dried blood samples collected as part of the screening programme for phenylketonuria. The method is sensitive and precise, and results correlate well with those obtained in TSH assays of serum samples. The procedure is rapid, results being available within 24 h of receipt of samples. Of 25204 specimens so far screened by this assay, 99.9% have TSH levels less than 15 mU/1. One false positive result has been obtained and six confirmed cases of neonatal hypothyroidism detected, giving a prevalence of 1 in 4200.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
