MRI can be used to confirm the subdural placement of an epidural catheter that presents with atypical block characteristics.
MRI may confirm subdural catheter placement despite later normal epidural behavior; case report leaves open incidence and detection protocols.
An epidural performed for obstetric analgesia was initially characteristic of a subdural block but subsequently behaved as a normal epidural. Radiological confirmation of the catheter having been subdural was established by performing a magnetic resonance imaging scan.
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Ralph et al. (1996) studied this question.
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