Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Changes in Disc Height as a Prognostic Factor in Patients Undergoing Microscopic Discectomy

  • Myeonggeon Kweon (Department of Neurosurgery, Hanyang University Medical Center, College of Medicine, Hanyang University) ;
  • Koang-Hum Bak (Department of Neurosurgery, Hanyang University Medical Center, College of Medicine, Hanyang University) ;
  • Hyeong-Joong Yi (Department of Neurosurgery, Hanyang University Medical Center, College of Medicine, Hanyang University) ;
  • Kyu-Sun Choi (Department of Neurosurgery, Hanyang University Medical Center, College of Medicine, Hanyang University) ;
  • Myung-Hoon Han (Department of Neurosurgery, Hanyang University Guri Hospital) ;
  • Min-Kyun Na (Department of Neurosurgery, Hanyang University Medical Center, College of Medicine, Hanyang University) ;
  • Hyoung-Joon Chun (Department of Neurosurgery, Hanyang University Medical Center, College of Medicine, Hanyang University)
  • Received : 2023.06.05
  • Accepted : 2023.09.29
  • Published : 2024.03.01
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Abstract

Objective : Some patients with disc herniation who underwent discectomy complain of back pain after surgery and are unsatisfied with the surgical results. This study aimed to evaluate the relationship between preoperative disc height (DH), postoperative DH, and pain score 12 months after surgery in patients who underwent microdiscectomy for herniated lumbar disc. Methods : This study enrolled patients who underwent microdiscectomy at a medical center between January 2012 and December 2020. Patients with X-ray or computed tomography and pain score assessment (visual analog scale score) prior to surgery, immediately post-op, and at 1, 6, and 12 months after surgery were included. The DH index was defined as DH/overlying vertebral width. The DH ratio was defined as the postoperative DH/preoperative DH. Simple linear regression and multivariate linear regression analyses were applied to assess the correlation between DHs and leg pain scores 12 months after surgery. Results : A total of 118 patients who underwent microdiscectomy were included. DH decreased up to 12 months after surgery. The DH ratio at 1, 6, and 12 months after discectomy showed a significant positive correlation with the pain scores at 12 months after discectomy (1 month : p=0.045, B=0.52; 6 months : p=0.008, B=0.78; 12 months : p=0.005, B=0.69). Multivariate linear regression analysis revealed that the level of surgery, sex, age, and body mass index had no significant relationship with back pain scores after 12 months. Conclusion : In patients who underwent microdiscectomy, the DH ratios at 1, 6, and 12 months after surgery were prognostic factors for back pain scores at 12 months after surgery. Aggressive discectomy is recommended for lower postoperative DH ratios and Visual analog scale scores, leading to improved patient satisfaction.

Keywords

References

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