La ratio de grosor diafragmático (inspiratorio/espiratorio) como método diagnóstico de parálisis diafragmática asociada al bloqueo interescálenico

The index of inspiratory / expiratory diaphragmatic thickness at cut-off < 1.2 seems to be useful in the diagnosis of phrenic paresis associated with interscalene block. This index does not require a baseline pre-assessment.