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Hermansen E, Myklebust TÅ, Austevoll IM, Hellum C, Storheim K, Banitalebi H, Indrekvam K, Brisby H. Dural Sac Cross-sectional area change from preoperatively and up to 2 years after decompressive surgery for central lumbar spinal stenosis: investigation of operated levels, data from the NORDSTEN study. Eur Spine J 2024:10.1007/s00586-024-08251-4. [PMID: 38587545 DOI: 10.1007/s00586-024-08251-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 03/18/2024] [Accepted: 03/31/2024] [Indexed: 04/09/2024]
Abstract
PURPOSE The aim of the present study was to investigate how canal area size changed from before surgery and up to 2 years after decompressive lumbar surgery lumbar spinal stenosis. Further, to investigate if an area change postoperatively (between 3 months to 2 years) was associated with any preoperative demographic, clinical or MRI variables or surgical method used. METHODS The present study is analysis of data from the NORDSTEN- SST trial where 437 patients were randomized to one of three mini-invasive surgical methods for lumbar spinal stenosis. The patients underwent MRI examination of the lumbar spine before surgery, and 3 and 24 months after surgery. For all operated segments the dural sac cross-sectional area (DSCA) was measured in mm2. Baseline factors collected included age, gender, BMI and smoking habits. Furthermore, surgical method, index level, number of levels operated, all levels operated on and baseline Schizas grade were also included in the analysis. RESULTS 437 patients were enrolled in the NORDSTEN-SST trial, whereof 310 (71%) had MRI at 3 months and 2 years. Mean DSCA at index level was 52.0 mm2 (SD 21.2) at baseline, at 3 months it increased to 117.2 mm2 (SD 43.0) and after 2 years the area was 127.7 mm2 (SD 52.5). Surgical method, level operated on or Schizas did not influence change in DSCA from 3 to 24 months follow-up. CONCLUSION The spinal canal area after lumbar decompressive surgery for lumbar spinal stenosis increased from baseline to 3 months after surgery and remained thereafter unchanged 2 years postoperatively.
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Affiliation(s)
- Erland Hermansen
- Department of Research and Innovation, Møre and Romsdal Hospital Trust, Ålesund, Norway.
- Institute of Health Sciences, Norwegian University of Technology and Science, Ålesund, Norway.
- Kysthospitalet in Hagevik, Orthopedic Clinic, Haukeland University Hospital, Bergen, Norway.
| | - Tor Åge Myklebust
- Department of Research and Innovation, Møre and Romsdal Hospital Trust, Ålesund, Norway
- Department of Registration, Cancer Registry Norway, Oslo, Norway
| | - Ivar Magne Austevoll
- Kysthospitalet in Hagevik, Orthopedic Clinic, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Christian Hellum
- Division of Orthopedic Surgery, Oslo University Hospital Ullevål, Oslo, Norway
| | - Kjersti Storheim
- Communication and Research Unit for Musculoskeletal Health (FORMI), Oslo University Hospital Oslo, Oslo, Norway
| | - Hasan Banitalebi
- Department of Diagnostic Imaging, Akershus University Hospital, Nordbyhagen, Norway
- Department of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Kari Indrekvam
- Kysthospitalet in Hagevik, Orthopedic Clinic, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Helena Brisby
- Department of Orthopedics, Sahlgrenska University Hospital, Gothenburg, Sweden
- Department of Orthopedics, Institute for Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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