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논문 기본 정보

자료유형
학술저널
저자정보
Sang Hun Lee (Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine) Micheal Raad (Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine) Andrew H. Kim (Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine) David B. Cohen (Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine) Khaled M. Kebaish (Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine)
저널정보
대한척추신경외과학회 Neurospine Neurospine Vol.21 No.2
발행연도
2024.6
수록면
502 - 509 (8page)
DOI
10.14245/ns.2347116.558

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초록· 키워드

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Objective: Few studies have reported radiographic and clinical outcomes of transverse pro cess hook (TPH) placement at the proximal thoracic upper instrumented vertebra (UIV) in adult spinal deformity (ASD) surgery. This study aims to investigate radiographic and clinical outcomes of TPH placement at the UIV for ASD surgery. Methods: This is a retrospective cohort of 56 patients with ASD (age, 59 ± 13 years; followup, 44 ± 19 months) from Johns Hopkins Hospital, who underwent long posterior spinal fusion to the proximal thoracic spine (T2–5). Visual analogue scale (VAS) for back pain, Oswestry Disability Index (ODI), 36-item Short Form health survey scores, thoracic kyphosis (TK), lumbar lordosis, sacral slope, pelvic tilt, pelvic incidence, proximal junctional kyphosis (PJK) angle, PJK incidence, pattern of PJK, grades of TPH dislodgement, revision surgery, and factors associated with high-grade TPH dislodgement were analyzed. Results: VAS for back pain and ODI values improved significantly from preoperatively to final follow-up. Mean change in PJK angle was 12° (range, 0.5°–43°). Twenty patients (36%) developed PJK, of whom 13 had compression fractures at 1 vertebra distal to the UIV (UIV–1). Final TPH position was stable in 42 patients (75%). In most patients (86%), TPH dislodgement did not progress after 6-month postoperative follow-up. Three patients (5.3%) underwent revision surgery to extend the fusion because of symptomatic PJK. Unstable TPH position was associated only with revision surgery and TK. Conclusion: TPH placement at the proximal thoracic UIV for long fusion showed favorable clinical and radiographic outcomes in terms of the incidence of PJK and mean PJK angle at mean 44-month follow-up. TPHs placed in the proximal thoracic UIV were in stable position in 75% of patients. Compression fracture at UIV–1 was the most common pattern of PJK. PJK angle progression was greater in revision cases and in patients with greater preoperative thoracic kyphosis.

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