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Related Experiment Video

Updated: Oct 7, 2025

Transtubular Endoscopic Posterolateral Decompression for L5-S1 Lumbar Lateral Disc Herniation
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Spinal decompression with patient-specific guides.

Marco D Burkhard1, Mazda Farshad2, Daniel Suter3

  • 1Department of Orthopedics, Balgrist University Hospital, University of Zurich, Switzerland.

The Spine Journal : Official Journal of the North American Spine Society
|January 12, 2022
PubMed
Summary
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Patient-specific instruments (PSI) offer feasible and accurate spinal decompression, comparable in time to freehand techniques. PSI notably enhanced decompression extent for novice surgeons in a cadaver study.

Area of Science:

  • Spine surgery
  • Surgical techniques
  • Orthopedic surgery

Background:

  • Patient-specific instruments (PSI) are established for pedicle screw placement in spine surgery.
  • The application of PSI in spinal decompression surgery remains under-investigated.

Purpose of the Study:

  • To evaluate the feasibility and utility of PSI for spinal decompression.
  • To compare PSI with the conventional freehand (FH) technique.
  • To assess performance differences between expert and novice surgeons.

Main Methods:

  • A human cadaver study involving 32 midline decompressions.
  • Both expert and novice surgeons performed freehand (FH) and PSI-guided decompressions.
  • Surgical time, decompression area, cranial extent, and lateral recess bony overhang were measured postoperatively via CT scans.
Keywords:
3D printingDecompressionPatient-specificSpinal osteotomySpinal stenosisSpine

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Main Results:

  • Surgical times were similar between PSI and FH techniques for both expert and novice surgeons.
  • No significant differences were observed in cranial decompression extent or lateral recess bony overhang between techniques or surgeons.
  • Novice surgeons achieved a significantly larger decompression area with PSI compared to FH (477 vs. 305 mm²; p=.01).

Conclusions:

  • PSI-guided spinal decompression is feasible and accurate, with procedure times comparable to the FH technique in a cadaver model.
  • PSI demonstrated potential for enhancing decompression extent, particularly in novice surgeons.
  • Further in vivo investigations are warranted to explore PSI's role in spinal decompression.