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Related Experiment Videos

[Obtaining a reference pattern of rabbit brain thromboplastin].

B M Martínez Placencia, M C Lanzetti Theiler, M S Córdova Caballero

    Revista De Investigacion Clinica; Organo Del Hospital De Enfermedades De La Nutricion
    |July 1, 1989
    PubMed
    Summary

    Standardized thromboplastin ensures accurate oral anticoagulant therapy control. This study developed a national reference preparation, enabling consistent prothrombin time (PT) results on a common scale using the International Normalized Ratio (INR).

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    [Erythrocyte reference values in a Coulter S-Plus STKR, in healthy adults living at 2,240 meters above sea level].

    Revista de investigacion clinica; organo del Hospital de Enfermedades de la Nutricion·1991
    See all related articles

    Area of Science:

    • Biochemistry
    • Clinical Chemistry
    • Hematology

    Context:

    • The prothrombin time (PT) test is crucial for monitoring oral anticoagulant therapy.
    • Interlaboratory variability in PT results necessitates a standardized thromboplastin reagent.
    • Current PT reporting methods (seconds or percentage) lack a common scale.

    Purpose:

    • To develop and validate a standardized rabbit brain thromboplastin for national use.
    • To establish a common reference scale for PT results, improving oral anticoagulant therapy control.
    • To encourage laboratories to produce or adopt standardized thromboplastin preparations.

    Summary:

    • Rabbit brain thromboplastin was prepared using Quick's technique and calibrated against the international reference thromboplastin RBT/079.

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  • Statistical analysis yielded an International Sensitivity Index (ISI) of 2.177 with a low coefficient of variation (2.09%).
  • The developed reagent allows for the calculation of the International Normalized Ratio (INR), standardizing PT measurements.

    • Impact:

    • The INNSZ thromboplastin serves as the first national reference preparation, facilitating standardized oral anticoagulant therapy monitoring.
    • Implementation of this standardized reagent enables the feasible introduction of an international scale for PT results in the country.
    • Improved standardization is expected to enhance the safety and efficacy of oral anticoagulant treatments.