Asian Spine J.
2014 Apr;8(2):138-144. 10.4184/asj.2014.8.2.138.
Spinous Process Osteotomy to Facilitate the Access to the Spinal Canal When Decompressing the Spinal Canal in Patients with Lumbar Spinal Stenosis
- Affiliations
-
- 1Department of Orthopedic Surgery, Alesund Hospital, More and Romsdal Hospital Trust, Alesund, Norway. erland.hermansen@helse-mr.no
- 2Kysthospitalet in Hagevik, Orthopedic Clinic, Haukeland University Hospital, Bergen, Norway.
- 3Department of Radiology, Haukeland University Hospital, Bergen, Norway.
- 4The Norwegian Arthroplasty Register, Orthopedic Clinic, Haukeland University Hospital, Bergen, Norway.
- 5Department of Surgical Sciences, University of Bergen, Norway.
- KMID: 2270366
- DOI: http://doi.org/10.4184/asj.2014.8.2.138
Abstract
- STUDY DESIGN: Retrospective study.
PURPOSE: The main purpose of this study was to investigate the union-rate of the spinous process after performing a spinous process osteotomy and whether union affects the clinical results after surgery.
OVERVIEW OF LITERATURE: In the present study, spinous process osteotomy was used to facilitate access to the spinal canal when performing a decompressive procedure for lumbar spinal stenosis. The aim of this study was to evaluate the union rate of the spinous process and its effect on the clinical results of the procedure.
METHODS
All patients were included in the study that underwent a decompressive procedure through spinous process osteotomy be between January 1, 2007 and December 31, 2007. Operation protocols were reviewed. A computed tomography (CT) scan was performed to evaluate the union of the osteotomies of the spinous process. According to the CT-scans, patients were divided into three groups: "complete-union," "partial-union," and "non-union." Patients reported their clinical results through a self-administered questionnaire.
RESULTS
The mean period of follow up was 21.6 months (range, 16-28 months). A total of 44% of the performed osteotomies were considered as united. Ten patients (18%) were classified as "complete-union," 30 patients (55%) as "partial-union," and 15 patients (27%) as "non-union." The "complete-union" group showed better clinical results and scored significantly better in the Oswestry Disability Index and EQ-5D. However, no statistical difference was found in the pain-scores. There were no differences between the "partial-union" group and the "no-union" group.
CONCLUSIONS
We found a radiologic union for 60 out of 135 (44%) spinous process osteotomies.
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