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New Standard to Help Diagnose Heart Attacks

Quality Digest
Sun, 05/23/2004 - 22:00
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Diagnosing heart attacks may become an even more precise science with the advent of the first of a series of new clinical standards issued by the National Institute of Standards and Technology.

Standard Reference Material 2921--human cardiac troponin complex--is intended to help manufacturers develop and calibrate assays that measure specific protein concentrations in patient blood samples to determine whether a heart attack has occurred.

The SRM is a solution containing certified concentrations of three related proteins including cardiac troponin I, purified from human heart tissue from cadavers. Users can calibrate their assays by analyzing the SRM and comparing the results to the NIST-certified value for troponin I. The standard is expected to help reduce variations in clinical test results from as much as 50-fold on the same sample to twofold. "It’s a big first step toward getting the system under control," says Michael Welch, leader of the NIST development team.

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