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Radiographic findings of unilateral epidural block
1Department of Anesthesiology, Kitasato University School of Medicine, Kanagawa, Japan.
Anesthesia and Analgesia
|September 1, 1996
Summary
Unilateral epidural anesthesia is often caused by catheter misplacement into the anterior epidural space. Epidurography revealed anterior epidural space or transforaminal placement as common causes.
Area of Science:
- Anesthesiology
- Pain Management
- Neurosurgery
Background:
- Unilateral epidural blockade can complicate lumbar epidural anesthesia.
- Accurate catheter placement is crucial for effective bilateral anesthesia.
Purpose of the Study:
- To investigate the causes of unilateral loss of cold sensation during lumbar epidural anesthesia.
- To clarify the epidural catheter tip location in patients experiencing unilateral block.
Main Methods:
- Epidurography was performed in seven patients with unilateral loss of cold sensation.
- Catheter tip location was analyzed using epidurography findings.
Main Results:
- Four out of seven patients (57%) had epidural catheters misplaced in the anterior epidural space.
- Three out of seven patients (43%) had catheters placed in the transforaminal passage.
- Successful bilateral anesthesia was achieved in all patients after repositioning the catheter.
Conclusions:
- Catheter misplacement into the anterior epidural space is the most frequent cause of unilateral lumbar epidural blockade.
- Early identification and correction of catheter malposition are essential for effective anesthesia.