Skip to main content

Table 2 Details of the two foraminoplasty procedure

From: Short-term effectiveness of precise safety decompression via double percutaneous lumbar foraminoplasty and percutaneous endoscopic lumbar decompression for lateral lumbar spinal canal stenosis: a prospective cohort study

  Target region The inclination of the trephine Removed section The depth of foraminoplasty
In lateral view In AP view
The first foraminoplasty Retrodiscal space (Zone 1) From the tip of superior articular process (SAP) to the posterior rim of the upper endplate of distal vertebral From the tip of SAP to midpoint of upper endplate of distal vertebral body Upper-medial-ventral part of facet joint which comprise tip and upper-ventral part of SAP, a part of inferior articular process (IAP) and a small ventral part of laminar. Limited to 10–12 mm controlled by the special designed trephine
The second foraminoplasty Upper bony lateral recess (zone 2) From the tip of SAP to the cross-point of middle pedicular line and the posterior surface of vertebral body From the tip of SAP to midpoint of middle pedicular line Lower medial-ventral part of SAP Limited to 12–14 mm controlled by the special designed trephine