
Accidental Subdural Injection of Local Anesthetics
Predisposing factors:
1-Difficult epidural block.
2-Previous back surgery.
3-Recent lumbar puncture (CSF leak through epidural rent leading to distended subdural space).
4-Rotation of the epidural needle in epidural space through an arc of 180°.
5-Prolonged epidural catheterization.
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