Percutaneous epidural neuroplasty (PEN) is an interventional treatment option for chronic low back and lower extremity radicular pain that is refractory to conservative management or conventional epidural steroid injection. Traditional caudal PEN using a Racz catheter has been widely used; however, catheter manipulation can be difficult when the target lesion is located above L5/S1 or when severe spinal stenosis, postoperative adhesion, or degenerative anatomical changes are present. The retrodiscal approach allows more direct access to the disc–nerve interface and may provide targeted treatment around the affected nerve root while avoiding the vascular risk associated with the conventional safe triangle approach. The Whip catheter® is a steerable catheter system designed for retrodiscal approach PEN. Its unidirectional steerable tip, stylet-assisted stiffness, and blunt-tip side-hole needle may facilitate selective catheter placement, local drug delivery, and hydrostatic or chemical adhesiolysis near the target lesion. However, because the retrodiscal approach is performed close to the intervertebral disc and nerve root, careful fluoroscopic guidance, contrast confirmation, and monitoring for intradiscal or intravascular injection are essential. This review summarizes the anatomical rationale, technical considerations, potential advantages, limitations, and safety issues of retrodiscal approach PEN using the Whip catheter.
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Abstract 서론 본론 경피적 경막외 신경성형술의 접근법 Safe triangle approach와 retrodiscal approach Whip catheter®의 구조적 특징과 술기적 장점 임상적 적용과 환자 선택 시술 시 고려사항 안전성 및 합병증 예방 결론 참고문헌