Fig. 1. Serial images of balloon decompressive foraminoplasty using a 3 Fr Fogarty catheter filled with contrast medium. (A) A needle was placed in the L4 intervertebral foramen and contrast medium was injected to confirm the epidural space. The contrast agent spread to the sleeve region in a slit-like pattern. (B, C) Balloon decompression was serially performed along with intervertebral neural foramen. (D) After balloon decompression, the spread pattern of contrast agent appeared wider, suggesting that perineural adhesiolysis had been achieved.
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