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May 15, 2026Scientific ReportsOpen Access

A modified four-zone classification of the posterior lumbar spinal canal: An anatomical study and clinical application in microchannel surgery

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Modified trial evaluates anatomical classification for enhancing microchannel surgery outcomes, showing significant benefits.

To introduce and assess a modified four-zone classification of the posterior lumbar spinal canal and its clinical application in microchannel surgery.
Anatomical measurements were conducted on six fresh-frozen human cadaveric spines to study key parameters of the ligamentum flavum.
Retrospective analysis compared outcomes of 223 patients undergoing microchannel surgery, divided into conventional localization (Group A) and modified classification (Group B).
Outcomes assessed included fluoroscopy time, tilt angle, blood loss, operative duration, hospital stay, and pain scores.
Group B had significant reductions in fluoroscopy time (4.4 vs. 5.7 min, p < 0.01) and microchannel tilt angle (7.8° vs. 10.1°, p < 0.01).
Blood loss was lower in Group B (44.7 vs. 58.5 ml, p < 0.01), and operative time decreased (69.4 vs. 81.4 min, p < 0.01).
Superior leg pain outcomes were found in Group B (final VAS score: 0.5 vs. 1.8, p < 0.01) and higher patient satisfaction (85.8% vs. 75.7%, p = 0.03).

Shu et al. (2026) studied this question.

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May 15, 2026Scientific ReportsOpen Access

View Full Paper

Ask AI

Bookmark

Authors

Modified trial evaluates anatomical classification for enhancing microchannel surgery outcomes, showing significant benefits.

To introduce and assess a modified four-zone classification of the posterior lumbar spinal canal and its clinical application in microchannel surgery.
Anatomical measurements were conducted on six fresh-frozen human cadaveric spines to study key parameters of the ligamentum flavum.
Retrospective analysis compared outcomes of 223 patients undergoing microchannel surgery, divided into conventional localization (Group A) and modified classification (Group B).
Outcomes assessed included fluoroscopy time, tilt angle, blood loss, operative duration, hospital stay, and pain scores.
Group B had significant reductions in fluoroscopy time (4.4 vs. 5.7 min, p < 0.01) and microchannel tilt angle (7.8° vs. 10.1°, p < 0.01).
Blood loss was lower in Group B (44.7 vs. 58.5 ml, p < 0.01), and operative time decreased (69.4 vs. 81.4 min, p < 0.01).
Superior leg pain outcomes were found in Group B (final VAS score: 0.5 vs. 1.8, p < 0.01) and higher patient satisfaction (85.8% vs. 75.7%, p = 0.03).

Shu et al. (2026) studied this question.

View Full Paper

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