How I do it: The K-point approach in unilateral biportal endoscopic lumbar discectomy: a bone and ligamentum flavum preserving technique.

Abstract

Conventional unilateral biportal endoscopic discectomy for subarticular herniations frequently necessitates extensive hemilaminectomy, increasing the risks of iatrogenic instability and epidural scarring. The K-point approach is a precision docking technique utilizing the medial junction between the inferior and superior articular processes. By creating a strategic lateral corridor, it minimizes bone removal and exposes the lateral margin of the ligamentum flavum, allowing direct access to the traversing nerve root. By reducing bone resection and preserving the ligamentum flavum, the K-point approach enhances surgical efficiency and provides a refined minimally invasive alternative for subarticular disc herniations.