Evaluation of kryptor cardiac troponin I immunoassay.
METHODS
Cardiac troponin I (cTnl) is well recognized as a specific marker for myocardial infarction. A fully automated, random access, fluorescent immunoassay for cTnl was evaluated in comparison with an established assay (Stratus cTnl) using samples from healthy subjects and from patients with cardiac disease.


RESULTS
The detection and precision were acceptable, and no interference was observed from bilirubin, triglycerides, haemoglobin, rheumatoid factor, drugs (aspirin, dopamine, digoxin) or heparin. Results on the Kryptor cTnl assay correlated with those on the Stratus II cTnI assay. The optimum Kryptor cTnl concentration for acute myocardial infarction was 0.63 microg/L, with a sensitivity of 89% [95% confidence interval (CI): 75.9-96.3] and specificity of 98.9% (95% CI: 93.9-99.8).


CONCLUSIONS
Kryptor cTnl immunoassay is suitable for use in the diagnosis of myocardial infarction.
Lefèvre
Guillaume
G
Service de Biochimie et Hormonologie Hĵpital Tenon, Paris, France. guillaume.lefevre@tnn.ap-hop-paris.fr
Graïne
Hanafi
H
Bakkouch
Karim
K
Garbarz
Eric
E
Marlin
Ginette
G
Michel
Pierre Louis
PL
Capeau
Jacqueline
J
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000097:blood; D005260:Female; D006801:Humans; D007118:Immunoassay; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood / Q000175:diagnosis*; D009206:Myocardium / Q000737:chemistry; D012680:Sensitivity and Specificity; D019210:Troponin I / Q000097:blood*
D015415:Biomarkers; D019210:Troponin I