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El uso y la importancia clínica de un electrodo específico de sustrato para la determinación rápida de las
J Aduen1, W K Bernstein, T Khastgir
1Department of Medicine, Sinai Hospital of Baltimore, MD 21215-5271.
JAMA
|December 7, 1994
Resumen
Un nuevo electrodo mide con precisión el lactato sanguíneo. Los niveles elevados de lactato (>4 mmol/L) son raros en individuos sanos y pueden indicar enfermedad grave o riesgo de mortalidad en pacientes hospitalizados.
Área de la Ciencia:
- Química clínica es la química clínica.
- Ingeniería Biomédica Ingeniería Biomédica.
- Medicina de cuidados críticos Medicina de cuidados críticos.
Sus antecedentes:
- La medición rápida y precisa del lactato circulante es crucial para el diagnóstico y el pronóstico del paciente.
- Los métodos existentes para la determinación del lactato pueden consumir mucho tiempo, lo que limita su utilidad en entornos de cuidados intensivos.
Objetivo del estudio:
- Evaluar la precisión y la importancia clínica de un nuevo electrodo amperométrico, enzimático y específico para el sustrato para la medición rápida del lactato.
- Para establecer el valor diagnóstico y pronóstico de las concentraciones elevadas de lactato en sangre.
Principales métodos:
- Un estudio prospectivo que involucró a 1218 pacientes y sujetos de control en varios entornos hospitalarios (UCI, ED, salas generales).
- Validación del nuevo electrodo con dos métodos de referencia de laboratorio establecidos.
- Análisis de las concentraciones de lactato en sangre en diversas poblaciones de pacientes para evaluar la importancia clínica.
Principales resultados:
- El nuevo electrodo demostró un excelente acuerdo con los métodos de referencia en términos de sesgo, precisión y correlación (valores de r hasta .98).
- Las concentraciones elevadas de lactato (>4 mmol / L) fueron significativamente más altas en pacientes de UCI y ED en comparación con sujetos normales y pacientes de la sala general (P < .001).
- Los niveles de lactato >4 mmol/L mostraron una alta especificidad (98,2%) para predecir el ingreso hospitalario en pacientes con disfunción eréctil y una alta especificidad (96%) para predecir la mortalidad en pacientes hospitalizados no hipotensivos.
Conclusiones:
- El nuevo electrodo amperométrico proporciona mediciones precisas y precisas de lactato.
- Las concentraciones de lactato en sangre superiores a 4 mmol/L son poco comunes en pacientes sanos o no críticos y señalan una preocupación potencial.
- Los niveles elevados de lactato (>4 mmol / L) se asocian con un mal pronóstico tanto en pacientes hospitalizados con enfermedades críticas como en pacientes hospitalizados con enfermedades no críticas.
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