What are the new conversion factors for TG and TPO on ImmunoCAP?

What are the new conversion factors for TG and TPO on ImmunoCAP?

The conversion factors are fixed in the software and are different for ImmunoCAP 100 vs ImmunoCAP 250:

 - TPO     16.7
 - TG       122

ImmunoCAP 100:
 - TPO      18
 - TG       140

 For EliA there is no conversion factor, the factor is different from lot to lot and is implemented in the barcode.

 

Detection limits

With these conversion factors you can calculate the detection limits by multiplying with 2 for the lower detection limit and with 200 for the upper detection limit.  

Assay

conversion factor

detection limits

TPO on ImmunoCAP 250

16.7

33.4 - 3340 IU/ml

TG on ImmunoCAP 250

122

244 - 24400 IU/ml

TPO on ImmunoCAP 100

18

36 - 3600 IU/ml

TG on ImmunoCAP 100

140

280 - 28000 IU/ml

 

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As in all diagnostic testing, the diagnosis is made by the physican based on both test results and the patient history.