In:
Journal of Minimally Invasive Spine Surgery and Technique, Korean Minimally Invasive Spine Surgery Research Society, Vol. 8, No. Suppl 1 ( 2023-07-25), p. S85-S91
Abstract:
Objective: Spinal surgeons have developed novel minimally invasive (MIS) protocols to correct adult degenerative spinal deformities in well-selected patients. Many surgeons perform these cases in stages: first by an anterior/lateral approach for interbody device placement, and second by a posterior approach for fixation. Imaging is typically obtained in between these 2 stages to reassess the surgical anatomy. We evaluated the utility of interstage imaging by comparing alignment parameters between baseline, interstage, and final postoperative radiographs. Methods: We reviewed MIS deformity cases performed at our institution by 3 expert surgeons, which were staged and had complete preoperative, interstage, and postoperative radiographs. Standard alignment parameters at all timepoints were compared.Results: Thirty-three patients met the criteria for inclusion. There were significant differences between baseline and interstage values for lumbar lordosis (LL, p = 0.004), pelvic tilt (PT, p = 0.002), and pelvic incidence-lumbar lordosis mismatch (PI-LL, p = 0.002). No significant differences existed between interstage and postoperative measurements for these sagittal parameters. Significant differences were found between interstage and postoperative values for the major Cobb angle (p = 0.012) and the lumbar Cobb angle (p = 0.016). Conclusions: In staged cases, our surgeons typically obtain interstage imaging, primarily standing scoliosis films. These studies inform the final levels of instrumentation and the need for additional posterior osteotomies/decompression during stage II. Based on interstage imaging findings, most sagittal correction occurs after stage I, while coronal correction occurs after stage II.
Type of Medium:
Online Resource
ISSN:
2508-2043
DOI:
10.21182/jmisst.2023.00759
Language:
English
Publisher:
Korean Minimally Invasive Spine Surgery Research Society
Publication Date:
2023
detail.hit.zdb_id:
3144662-0
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