El sistema de válvulas ProGAV de Miethke representa un state of the art en el rango de válvulas ajustables. La válvula de precisión fabricada en titaneo combina un máximo de seguridad y un manejo simple. La presión de apertura de la válvula puede ajustarse a las necesidades de los pacientes en posición tumbada. En combinación con la unidad gravitacional, la presión de apertura incrementa automáticamente al levantarse el paciente. La válvula Miethke ProGAV ofrece una protección efectiva contra sobre-drenaje. Los instrumentos patentados de ajuste y verificación permiten fácilmente, rápido y sin complicación un tratamiento sin necesidad de tener que pasar el enfermo por rayos-x. Su mecanismo de bloqueo activo evita reajustes no deseados causados por campos magnéticos hasta 3 Tesla
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