Why the study?
The percentage of failed epidural anesthesia placement due to subdural catheter placement is unknown, and identification is difficult despite negative test doses and negative cerebrospinal fluid aspiration.
Real-time fluoroscopic imaging is utilized to determine the incidence of unrecognized subdural catheter placement during epidural anesthesia.
Subdural catheter placement may evade standard detection; leaves open its incidence and optimal identification in routine obstetric epidurals.
(Reg Anesth Pain Med. 2021;46:538–539) The percentage of failed epidural anesthesia placement due to subdural catheter placement is unknown. Subdural catheter placement is difficult to identify because it can occur despite having a negative test dose and negative aspiration of cerebrospinal fluid. This poses a problem to the patient because subdural placement may not penetrate anterior nerve roots, resulting in continued pain. This study utilized real-time fluoroscopic imaging in an effort to determine the incidence of subdural catheter placement during epidural anesthesia.
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Sidash et al. (2022) studied this question.
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