Spinal Osteotomy Research Articles

Patient-Specific Rods in Adolescent and Adult Spinal Deformity Surgery: A Narrative Review.

Spinal deformity surgery often requires complex surgical interventions that can have a drastic effect on both patient quality of life and functional capacity. Modern-day corrective solutions for these deformities include spinal osteotomies, pedicle screw instrumentation, and dual/multirod constructs. These solutions are efficacious and are currently considered standard practice for spinal surgeons, but they lack individualization. Patient-specific rods (PSRs) are a novel technology that attempts to offer a personalized approach to spinal deformity correction based on preoperative computerized tomography scans. Moreover, PSRs may offer several advantages to conventional rods, which include achievement of desired rod contour angles according to surgical planning alignment goals, reduced operative time, and reduced blood loss. In adolescent idiopathic scoliosis, those instrumented with PSR have observed coronal Cobb reductions up to 74%. In adult spinal deformity, PSRs have offered superior correction in radiographic parameters such as sagittal vertical axis and pelvic incidence minus lumbar lordosis. However, there still remains a paucity of research in this area, mainly in health care expenditure, cost-effectiveness, and longitudinal clinical outcomes. The purpose of this article is to survey the current body of knowledge of PSR instrumentation in both adolescent and adult spinal deformity populations. The current strength, limitations, and future directions of PSRs are highlighted throughout this article.

Efficacy and Surgical Outcomes of Posterior Apical Spinal Osteotomy in Severe Thoracic/Thoracolumbar/Lumbar Kyphoscoliosis in Dystrophic Curves of Neurofibromatosis Type 1

Objective: Kyphoscoliosis is the most common deformity seen in patients with neurofibromatosis type 1 (NF1), occurring in 10%–60% of cases. These dystrophic curves often exhibit severe deformities that require surgical intervention. Various procedures have been evaluated and studied; however, there is no consensus, and these are also associated with a higher rate of morbidity. Therefore, this study aimed to evaluate the clinical and radiological outcomes of apical spinal osteotomy (ASO) in NF1 patients with dystrophic curves who exhibited thoracic, thoracolumbar, or lumbar kyphoscoliosis.Methods: We conducted a retrospective analysis of prospectively collected data involving 21 children with dystrophic NF1 curves who underwent ASO at a single tertiary care center from November 2009 to June 2017. The efficacy of ASO for correcting coronal and sagittal deformities was assessed. Clinical outcomes (visual analogue scale [VAS], Oswestry Disability Index [ODI], and Frankel grade) and radiological outcomes (Cobb angle correction, fusion, and complications) were evaluated.Results: The study included 21 patients (11 males, 10 females) with a mean age at surgery of 9.33 years. The mean kyphotic Cobb angle improved significantly from 98.33° to 36.52°. The mean sagittal vertical axis also improved significantly from 7.40 cm to 4.21 cm, along with significant improvements in VAS and ODI scores.Conclusion: This study describes a technique using a posterior approach for single-level ASO in the treatment of severe dystrophic NF1 curves. The technique can be effective in children with mild to moderate curves, yielding good clinicoradiological outcomes and satisfactory correction rates.

Pedicle Subtraction Osteotomies for Surgical Correction of Fixed Sagittal Imbalance: A Meta-Analysis and Systematic Review.

Disruption of the spine's sagittal balance is associated with significant negative impacts on quality of life. Compared with other spinal osteotomies, pedicle subtraction osteotomy (PSO), which can potentially offer greater correction, is considered technically challenging and performed at lower rates. The aim of this study was to review the use of PSO to correct fixed sagittal imbalance and assess its efficacy and associated perioperative complications. In accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, the PubMed, EBSCO host, MEDLINE, and Google Scholar databases were queried for full-text English manuscripts published from 1961 to 2022, exploring PSO for the management of fixed sagittal imbalance. Studies were included if they reported preoperative and postoperative radiographic measurements. The mean Methodological Index for Nonrandomized Studies (MINORS) for included articles was 9.6 ± 1.1. The outcomes of interest included etiology, operative time, blood loss, complications, radiographic outcomes, and patient-reported outcomes. Statistical analysis was performed using a random-effects, inverse variance-weighted meta-analysis of observational data. Pre and postoperative radiographic and clinical outcomes were compared using a Student t-test. Fourteen studies with 595 patients were included. Meta-analysis showed that the mean operative time was 7.2 ± 2.0 hours, and the average blood loss was 2033 ± 629 mL. After PSO, there was a significant improvement in sagittal vertebral axis (12.41-3.92 cm, P = .0003), LL (13.35°-42.60°, P = .000002), PSO angle (5.11° to -26.91°, P = .0001), and Oswestry Disability Index (55.36-27.35, P = .02). Common complications include pseudarthrosis (8.1%), neurological deficits (7.8%), and proximal junctional failure (6.0%). PSO offers significant correction of sagittal vertebral axis, lumbar lordosis, PSO angle, and Oswestry Disability Index scores despite its reduced utilization in recent years. Blood loss and high complication rates must be considered when evaluating the efficacy of this procedure; however, surgeon experience and operative techniques can be used to reduce morbidity.

Effectiveness and Safety of Preoperative Halo Gravity Traction-Assisted Posterior Spinal Fusion Surgery for Severe and Rigid Scoliosis: A Comparative Matched-Cohort Study

Background. Severe and rigid scoliosis poses significant challenges in surgical correction, and innovative approaches are continually sought to enhance effectiveness and ensure patient safety. Halo-gravity traction (HGT) continues to be a vital tool in managing severe spinal conditions, offering a nonsurgical or preoperative approach to address spinal deformities. However, the correction effect that HGT can achieve for severe and rigid spinal deformity is currently unclear and the impact of HGT on the selection of spinal osteotomy grade was still unknown. Methods. A retrospective matched-cohort study was conducted and a total of 74 patients from January 2018 to December 2021 in our institution were finally enrolled in this study, including 27 patients in the HGT group and 47 patients in the non-HGT group based on whether patients receive HGT or not. Comprehensive assessments including radiographic outcomes, surgical parameters, and clinical complications were collect and analyzed before and after correction surgery. Results. Of the patients included in the HGT group, 21 had thoracic curvature and 6 had thoracolumbar/lumbar curvature, compared with 38 and 9 in the non-HGT group, respectively (P=0.66). There was no significant difference in the etiologies of scoliosis between two groups (15/7/3/2 vs. 25/16/4/2, P=0.85). The main curve in HGT and non-HGT groups were corrected from an average of 113.69°–51.25° and 111.94°–63.79° (P<0.01). For the HGT group, the mean correction rate of focal kyphosis (FK) was 45.43%, which was significantly higher than those in the non-HGT group (33.98%, P<0.05). There were no statistically significant differences in preoperative parameters of sagittal vertical axis (SVA) (P=0.13) or thoracic kyphosis (TK) (P=0.07) between the two groups. Postoperatively, the HGT group showed significantly lower values in SVA (P=0.001) and TK (P=0.001) compared to the non-HGT group. However, there was no significant difference in the imaging parameters coronal vertical axis (CVA) and apical vertebral translation (AVT) between the two groups (P>0.05). In the preoperative surgical planning phase before HGT treatment, 26 patients were initially considered candidates for 3-column osteotomy (3CO), while one patient was evaluated as suitable for posterior column osteotomy (PCO). Following HGT treatment, the assessment changed with 11 patients identified as candidates for 3CO and 16 patients deemed suitable for PCO. The application proportion of 3CO was significantly higher in the non-HGT group than in the HGT group (P<0.05). The mean blood loss of the non-HGT group was significantly greater than that of the HGT group (666.67 ± 486.55 ml vs. 1024.47 ± 718.46 ml, P<0.05), but the surgical time showed no difference between the two groups (297.33 ± 66.89 mins vs. 299.15 ± 56.73 mins, P=0.90). The incidence of complications in the HGT group was 7.4%, which was significantly lower than that of the non-HGT group (P<0.05). Conclusion. This study showed that the use of HGT, as a feasible and safe strategy, has superior efficacy and safety for treating severe and rigid scoliosis and can reduce the level of osteotomy used during surgery to some extent.

Complications and outcomes after three-column osteotomy: a 5-year follow-up

BACKGROUNDThree-column spinal osteotomies (3-CO) are powerful techniques used to correct spinal deformity. These surgeries are associated with an elevated risk of complications. While outcomes have been reported in the literature with 2 years follow-up, longer-term outcomes of three-column osteotomies remain understudied. OBJECTIVESThis study aims to examine patient reported outcomes and complications for three-column osteotomies at 5 years. STUDY DESIGNRetrospective review of a prospectively collected spinal deformity cases database. PATIENT SAMPLEAll consecutive adult patients at a single spine surgery center treated with either a pedicle subtraction osteotomy (PSO) or vertebral column resection (VCR) for spinal deformity, and with a minimum 5-year follow-up were included. OUTCOME MEASURESVisual-analog scale (VAS) for back pain score (0 to 10), Oswestry Disability Index (ODI) score (0 to 100), number of complications, revision rate, sagittal balance, lumbar lordosis at preoperative and at 5-year visit. METHODSData was extracted from a prospectively collected spinal deformity surgery database continuously updated since 2002 with data from operative reports, patients’ medical visit notes and patients’ self-reported VAS and ODI questionnaires completed at each office visit. Radiographic measurements were performed on standing full-length spine radiographs taken at preop and 5-year visits. Descriptive statistics, comparison of means and proportions among groups, and a logistic regression analysis were conducted using the statistical software package SPSS version 28. Statistical significance was set at p<.05. RESULTSOf 127 consecutive adult patients with minimum of 5-year follow-up undergoing a 3-CO posterior spinal surgery for spinal deformity were identified and included in the study, 79 (62%) were treated with PSO, and 48 (38%) with VCR. Both PSO and VCR groups demonstrated significant improvements in VAS (PSO preop: 6.7, 5-year: 4.6, p<.001; VCR preop: 7.1, 5-year: 5.2, p<.001), and ODI (PSO preop: 52.9, 5-year: 45.4, p<.001; VCR preop: 57.5, 5-year 43.0, p<.001) that were maintained at 5 years. Major and minor complications occurring within 5 years were not statistically different between the PSO and VCR groups (major: 59.5% vs 56.3%, p=.85; minor: 45.6% vs 37.5%, p=.46). The rate of revision surgery within 5 years was 39.4% overall. Of the fifty patients requiring revision, 37.5% were for nonunion, 27.1% instrumentation failure, 14.6% proximal junctional kyphosis (PJK), 12.5% vertebral fracture, 6.3% motor weakness, and 2.1% infection. Improvements in lumbar lordosis were maintained at 5 years in both the PSO (29.9° vs 47.2°, p<.001) and VCR (34.6° vs 48.5°, p<.001) groups while sagittal balance maintained significant improvement in the VCR group (9.5 cm vs 6.3 cm, p=.008) but not the PSO (11.4 cm vs 9.3 cm, p=.065). CONCLUSIONPatients undergoing three-column osteotomies had a major complication rate of 57.5% and a minor complication rate of 42.5% after 5 years. Improvements in lumbar lordosis were maintained at 5-year follow-up, but sagittal balance was only maintained in the VCR group. Despite these radiographic findings, both VCR and PSO groups maintained significant clinical improvements in both VAS and ODI scores at 5-year follow up.

Surgical treatment for congenital vertebral anomalies with bilateral bifid intrathoracic rib in association: A series of five cases.

Congenital scoliosis is often associated with costal deformities, of which a bilateral bifid intrathoracic rib is very rare. The aim of this study was to retrospectively summarize the clinical manifestations, imaging characteristics, treatment strategies, and postoperative outcomes of five patients with bilateral bifid intrathoracic rib. We retrospectively reviewed the imaging findings and medical records of five pediatric patients (two girls, three boys) with bilateral bifid intrathoracic rib who were surgically treated for congenital kyphoscoliosis (mean age = 8 years). The clinical manifestations, imaging characteristics, treatment strategies, and postoperative outcome were summarized. Four of five patients showed abnormalities from birth. All five patients presented with kyphoscoliosis and a fused vertebral body or lamina. The bilateral bifid intrathoracic rib was located at T2-3 in three patients, T7 in one patient, and T10 in one patient. Various congenital spinal deformities and multiple system malformations were present in all five patients. Three patients had preoperative neurological deficits. For corrective surgery, one patient received a traditional growing rod implantation, one patient underwent resection of a bony septum, and three patients underwent spinal osteotomy. One patient suffered complete paralysis of the lower limbs after surgery. Bilateral bifid intrathoracic rib is a rare anomaly that typically occurs in patients with serious kyphoscoliosis. Bilateral bifid intrathoracic rib patients show similar clinical and radiological characteristics and are likely to exhibit neurological deficits before or following corrective surgery. Spinal surgeons should be aware of the high risk of permanent neurological complications related to surgery in these patients. level IV.

Hidden blood loss and bleeding characteristics in children with congenital scoliosis undergoing spinal osteotomies.

Spinal osteotomies are often essential in the treatment of congenital scoliosis. Risk factors for bleeding in these patients needing extracavitatory approaches, especially hidden blood loss, are sparsely investigated. We aimed to investigate the bleeding characteristics and hidden blood loss in paediatric patients undergoing spinal osteotomies for congenital scoliosis. A retrospective analysis identified all patients with congenital scoliosis were retrospectively identified from the prospectively collected spine register from 2010 to 2022. Operative technique, perioperative laboratory results and imaging studies were extracted. The primary outcome was total blood loss including intraoperative, drain output and hidden blood loss. Fifty-seven children (32 boys) with a mean age of 8.3 years underwent spinal osteotomy for congenital scoliosis. Posterolateral hemivertebrectomy was sufficient in 34 (59%) patients, while vertebral column resection (VCR) was required in 23 patients. Total bleeding averaged 792 (523) ml accounting for 42% of the estimated blood volume. Hidden blood loss accounted for 40% of total bleeding and 21% of estimated blood volume with a mean of 317 (256) ml. VCR was associated with greater intraoperative and total bleeding than hemivertebrectomies (p = 0.001 and 0.007, respectively). After adjusting for patient weight and fusion levels, hidden blood loss was larger in hemivertebrectomies (4.18 vs. 1.77 ml/kg/fused level, p = 0.049). In multivariable analysis, intraoperative blood loss was inversely correlated with preoperative erythrocyte levels. Younger age was associated with significantly greater drain, hidden and total blood loss. Hidden blood loss constitutes a significant portion (40%) of total bleeding in congenital scoliosis surgery. Younger age is a risk factor for bleeding and the hidden blood loss should be taken into consideration in their perioperative management.

Posterior Column Reconstruction of the Lumbar Spine Using En Bloc Resected Vertebral Arch in Spinal Tumor and Deformity Surgeries.

In high-grade spinal osteotomy involving large anterior column resection, restoration of the structural integrity of the posterior column at the osteotomy site can reduce postoperative instrumentation failure (IF). This study aimed to describe our technique of posterior strut bone grafting using an en bloc resected vertebral arch, which is useful for posterior column reconstruction after high-grade osteotomies during surgeries for spinal tumor and deformity in the lower lumbar spine. Using a posterior approach, en bloc resection of the targeted vertebral arch was performed in accordance with the surgical technique for total en bloc spondylectomy (TES). The posterior elements in the upper and lower adjacent vertebrae were separated by a significant space after vertebral body resection followed by cage insertion in TES or anterior column osteotomy followed by correction in deformity surgery. To create a new posterior column, the en bloc resected vertebral arch was placed at 90° rotation to bridge the upper and lower vertebral arches. Using this technique, an abundant amount of bone chips made from the resected vertebral elements were placed over the en bloc resected posterior arch as an additional bone graft. The technique was used in three patients who underwent TES for spinal tumors and in one patient who underwent grade 4 osteotomy for adult spinal deformity in the lower lumbar spine. One year after surgery, computed tomography showed that the structural integrity of bony fusion was successfully achieved between the en bloc resected arch and the posterior elements of the adjacent vertebrae in all patients and showed no postoperative IFs. This bone graft technique created new continuity of the posterior column after high-grade osteotomies in the lower lumbar spine. Bone fusion was achieved in the posterior elements to prevent IF after surgery.

Step-cut osteotomy of the anterior superior iliac spine for increased visualisation in the Levine approach for Bernese periacetabular osteotomy surgery.

Hip dysplasia can lead to pain and dysfunction in the young adult. Acetabular undercoverage leads to abnormal joint loading and results in joint degeneration, accelerating need for arthroplasty in this patient population. Conceptually, treatment focuses on increasing acetabular coverage in the form of periacetabular osteotomy. The procedure can be performed through the iliofemoral approach, and performing an anterior superior iliac spine (ASIS) osteotomy can enhance the visualisation in this approach. Several techniques have been described for ASIS osteotomy. The purpose this study was to report on step-cut technique for ASIS osteotomy during the Bernese periacetabular osteotomy procedure to enhance visualisation when utilising the iliofemoral approach. This step-cut technique enhances stability at the osteotomy site, and minimises soft tissue dissection to reduce pain and assists with maintaining a stable fixation construct postoperatively. There were no nonunions and minimal morbidity to the lateral femoral cutaneous nerve injury in cohort of 86 patients while utilising this technique. We recommend using this step-cut ostetomy of the ASIS during Bernese periactetabular osteotomy for benefit of increasing exposure while maintaining a low complication profile.

Sequential correction of severe and rigid kyphoscoliosis: a new technical note and preliminary results

ObjectiveThe present study is to evaluate the clinical outcomes of the sequential correction of severe and rigid kyphoscoliosis.MethodsBetween January 2014 and December 2020, 27 adults with severe and rigid kyphoscoliosis underwent sequential correction combined with posterior grade 4 or grade 5 spinal osteotomy. Radiological parameters, including the major curve Cobb angle, kyphotic angle, coronal imbalance, and sagittal vertical axis (SVA), were compared. Patient self-reported health-related quality of life (HRQOL) scores were used to evaluate clinical outcomes.ResultsThe mean major curve Cobb angle improved from 134.30 ± 13.24° to 44.48 ± 9.34° immediately after surgery and to 46.11 ± 8.94° at the final follow-up. The mean kyphotic angle improved from 112.15 ± 20.28° to 38.63 ± 15.00° immediately after surgery and to 39.85 ± 14.92° at the final follow-up. The mean preoperative major curve Cobb angle of grade 5 spinal osteotomy group was higher than that of grade 4 spinal osteotomy group. Coronal imbalance and SVA slightly improved. The patient self-reported HRQOL scores improved postoperatively and at the final follow-up. Activity, appearance and total scores of the SRS-22 of the grade 5 spinal osteotomy group at the final follow-up were significantly better than those of the grade 4 spinal osteotomy group.ConclusionsSequential correction combined with posterior grade 4 or grade 5 spinal osteotomies is an excellent and safe treatment for severe and rigid kyphoscoliosis in adults. Sequential correction combined with posterior grade 5 spinal osteotomies can be used to correct severe and rigid kyphoscoliosis with higher major curve Cobb angle.

Clinicoradiological Outcomes and Complication Profiles of Bilateral Dual Sacral-Alar-Iliac Screws versus Bilateral Single Sacral-Alar-Iliac Screws in Patients with Spinal Deformity Who Underwent Grade 3 or 4 Spinal Osteotomies: A Retrospective Comparative Study

To compare short-term clinical and radiological outcomes and complication profiles between bilateral dual sacral-2-alar-iliac (S2AI) screw and bilateral single S2AI screw fixation techniques in patients who underwent grade 3 or 4 spinal osteotomies. A retrospective review of 83 patients treated with bilateral dual S2AI screws and 32 patients treated with bilateral single S2AI screws was conducted between 2018 and 2020 with a minimum 1-year follow-up. Clinical and radiological outcomes of patients and incidence of perioperative complications, including rod breakage, screw dislodgment, proximal junctional kyphosis, proximal junctional failure, need for reoperation, and systemic adverse effects, were collected and statistically compared between the groups. With a mean follow-up of 18.2 months, rod fracture (6.0% vs. 18.7%, P= 0.03), screw dislodgment (0 vs. 12.5%, P < 0.01), and S2AI screw loosening (1.2% vs. 18.7%, P < 0.01) were significantly lower in the dual S2AI screws group than in the single S2AI screws group. However, the reoperation rate was similar between the 2 groups (24.1% vs. 34.3%, P= 0.26). No significant differences in clinical and radiological outcomes as well as proximal junctional kyphosis (10.8% vs. 18.7%, P= 0.25) and proximal junctional failure (9.6% vs. 18.7%, P= 0.18) were identified between the 2 groups. The dual S2AI screw fixation technique showed more advantages over the single S2AI screw fixation technique with reduced incidence of screw dislodgment, rod fractures, and sacral-alar-iliac screw loosening.

Type 3 bone-disc-bone osteotomy (grade 4+ osteotomy) combined with presurgical halo-pelvic traction: a safe and effective solution to correct severe angular-like kyphoscoliosis.

Treatment of severe angular-like kyphoscoliosis is a technically demanding surgical challenge and requires high-risk spinal osteotomy, such as vertebral column resection. Preoperative halo-pelvic traction is commonly used to decrease the curve magnitude. However, few studies have utilized the potent method of bone-disc-bone osteotomy, which could theoretically provide correction up to 60°. This study aimed to evaluate the safety and effectiveness of type 3 bone-disc-bone osteotomy combined with presurgical halo-pelvic traction to correct severe angular-like kyphoscoliosis. This was a retrospective cohort study. Patients with severe angular-like kyphoscoliosis who underwent presurgical halo-pelvic traction and type 3 bone-disc-bone osteotomy from January 2017 to December 2019 were consecutively reviewed. Patient demographics and clinical data were recorded. The coronal and sagittal Cobb angles were measured preoperation, post-traction, post-operation, and at the final follow-up. Complications were also recorded. Patients' health-related quality of life was evaluated by the Scoliosis Research Society 22 (SRS-22) questionnaire. Paired Student's t test and one-way analysis of variance were used for comparisons among different groups. Thirty patients (18 females and 12 males) with an average age of 20.2 years (range, 13-33 years) were included. The mean preoperative coronal and sagittal Cobb angles were 123.1°±16.4° (range, 90°-155°) and 120.3°±19.9° (range, 90°-156°), respectively. After 2.9±0.7 months (range, 2-4 months) of halo-pelvic traction, the coronal and sagittal Cobb angles decreased significantly to 81.9°±13.2° and 76.0°±12.6°, respectively. Postoperatively, the scoliotic and kyphotic angles further decreased to 42.4°±12.2° and 33.9°±8.8°, respectively. After a mean follow-up of 2.93±1.05 years, the correction rates were maintained at 64.3%±10.6% and 70.5%±6.3%, respectively. Nine patients experienced positive evoked potential events during surgery. Common complications after surgery included transient lower extremity weakness, pneumonia, and pleural effusion. The self-image scores were significantly improved from 2.66±0.27 to 3.36±0.23 compared to preoperation. This study proposes a novel strategy to correct severe angular-like spinal deformities. The combination of presurgical halo-pelvic traction and type 3 bone-disc-bone osteotomy (grade 4+ osteotomy) achieves substantial correction and satisfactory aesthetic outcomes without serious complications.

SHORT- TO MIDTERM RADIOGRAPHIC AND CLINICAL OUTCOMES OF ANTERIOR OPENING OSTEOTOMY WITH LAMINA SPARING IN POST-TRAUMATIC KYPHOSIS: A CASE SERIES

Purpose: Most spinal osteotomy procedures applied for spinal deformity and concomitant malalignment cases are associated with varied complications. This study evaluates the short- to midterm clinical and radiographic efficacy of the transpedicular anterior opening osteotomy technique. Methods: We retrospectively enrolled six patients who underwent transpedicular anterior opening osteotomy due to symptomatic rigid kyphotic deformity from May 2005 to 2016. During surgery, we created a new fracture line at the collapsed anterior vertebral body through bilateral pedicles, filled spaces with compacted bone grafts while preserving posterior elements, including lamina, and secured structure using posterior instrumentation. The kyphotic Cobb angle, Visual Analog Scale (VAS), and Oswestry Disability Index (ODI) before and after surgery were measured and analyzed. Results: The mean preoperative kyphotic Cobb angle was 31.41 ± 4.77[Formula: see text] while the postoperative value was 15.75 ± 1.66[Formula: see text]. The mean correction angle was 15.55 ± 6.66[Formula: see text]. The mean follow-up duration was 50.17 ± 44.16 months. During the final follow-up, the mean kyphotic angle was not statistically different from the postoperative values. All patients with documented VAS Back and ODI had improved values postoperatively. Conclusions: Transpedicular anterior opening osteotomy with posterior element preservation improves clinical outcomes and is safe and effective in correcting regional, fixed kyphotic deformities.

The 5-item modified frailty index predicts spinal osteotomy outcomes better than age in adult spinal deformity patients: an ACS - NSQIP analysis.

To evaluate the utility of 5-Item Modified Frailty Index (mFI-5) as compared to chronological age in predicting outcomes of spinal osteotomy in Adult Spinal Deformity (ASD) patients. Using Current Procedural and Terminology (CPT) codes, the American College of Surgeons National Surgery Quality Improvement Program (ACS-NSQIP) database was queried for adult patients undergoing spinal osteotomy from 2015 to 2019. Multivariate regression analysis was performed to evaluate the effect of baseline frailty status, measured by mFI-5 score, and chronological age on postoperative outcomes. Receiver-operating characteristic (ROC) curve analysis was performed to analyze the discriminative performance of age versus mFI-5. A total of 1,789 spinal osteotomy patients (median age 62years) were included in the analysis. Among the patients assessed, 38.5% (n = 689) were pre-frail, 14.6% frail (n = 262), and 2.2% (n = 39) severely frail using the mFI-5. Based on the multivariate analysis, increasing frailty tier was associated with worsening outcomes, and higher odds ratios (OR) for poor outcomes were found for increasing frailty tiers as compared to age. Severe frailty was associated with the worst outcomes, e.g., unplanned readmission (OR 9.618, [95% CI 4.054-22.818], p < 0.001) and major complications (OR 5.172, [95% CI 2.271-11.783], p < 0.001). In the ROC curve analysis, mFI-5 score (AUC 0.838) demonstrated superior discriminative performance than age (AUC 0.601) for mortality. The mFI5 frailty score was found to be a better predictor than age of worse postoperative outcomes in ASD patients. Incorporating frailty in preoperative risk stratification is recommended in ASD surgery.

ROLES OF SPINAL OSTEOTOMIES ON CORRECTION OF POST-TRAUMATIC THORACOLUMBAR KYPHOSIS

Thoracolumbar (T–L) fracture may create focal kyphosis accompanied by altered sagittal alignment, instability and potential neurological deficits. Surgical intervention for post-traumatic T–L kyphosis aims to restore sagittal balance, release compromised neural structures, and to improve the symptoms related to the malalignment. It is best indicated when there is a progression of kyphotic deformity, and/or when there are new or progressive neurological deficits. A kyphotic deformity [Formula: see text] is susceptible to persistent chronic pain in the kyphotic region and surgical correction is often required. Those with posterior ligamentous complex injury may also warrant surgical correction as there is a higher risk of kyphosis progression. A number of surgical procedures could be employed to correct post-traumatic T–L kyphosis. Spinal osteotomies are often needed to improve global, sagittal or coronal balance including in the late and fixed post-traumatic kyphosis. Based on different extent of focal kyphosis and global malalignment, surgical options may include posterior column osteotomy (PCO), pedicle subtraction osteotomy (PSO), disc-bone osteotomy (DBO), vertebral column resection (VCR) or closing opening wedge osteotomy (COWO). The type of spinal osteotomy utilized to correct post-traumatic T–L kyphosis should be chosen based on the severity of the deformity, the alignment of the spine, and the surrounding structures. In the meantime, potential complications should be reduced with novel techniques and proper constructs. When all associated factors are considered, surgical correction composing a suitable spinal osteotomy can be a beneficial and rewarding procedure for patients with post-traumatic T–L kyphosis.

Хірургічна корекція вродженого кіфозу в дітей. Клінічний випадок

Congenital kyphosis occurs as a result of a disorder of vertebral formation or segmentation. There are a number of scientific papers that evaluate and compare various methods of surgical treatment of patients with congenital kyphosis, as well as analyze complications in this group of patients. In the current literature, preference is given to methods with more aggressive correction of angular kyphotic deformity, in particular, corrective spinal osteotomies and various types of vertebrectomy. These methods can achieve significant deformity correction, but have a high risk of complications associated with fractures of the fixation rods in the long-term postoperative period. Purpose - to present a clinical case of surgical treatment of a patient with congenital kyphosis, which allowed to achieve significant correction of the deformity and reduce the number of complications associated with the instability of the metal structure. The clinical case describes the treatment of a 16-year-old patient with an active Th11 wedge-shaped halve vertebrae using the method of decancellation the latter and fixing the spine with a transpedicular metal structure. The peculiarity of the surgical intervention is the use of rib fragments as an autograft to form a posterior spondylodisc. Conclusions. The use of rib fragments as an autograft creates conditions for the formation of a posterior bone block, which reduces the risk of fracture of the fixation rods in the long-term postoperative period. The research was carried out in accordance with the principles of the Helsinki Declaration. The informed consent of the patient was obtained for conducting the studies. No conflict of interests was declared by the authors.

Is it possible to predict postoperative blood loss in surgery for idiopathic scoliosis?

Postoperative drain loss can exceed intraoperative blood loss and affect the severity of the patient's condition.Aim: The objective of the study was to find significant predictors of postoperative blood loss in surgery for idiopathic scoliosis. We analyzed the data of 140 patients with idiopathic scoliosis. One hundred three patients (group 1) un-derwent Smith-Petersen osteotomy as part of the multilevel pedicle screw fixation; 37 patients (group 2) required no spinal osteotomy. Correlation and regression analysis of the data was performed. There were significant differences between the groups in the number of fixed segments (p.

Aspects of vertebral column resection in patients with rigid kyphotic and kyphoscoliotic deformities of different genesis of the thoracolumbar spine: multicenter retrospective observational cohort study

BACKGROUND: Vertebral column resection (VCR) as a type of spinal osteotomy is characterized by maximum possibilities of three-dimensional correction of various etiologies: congenital, post-tuberculous, iatrogenic (after other interventions on the spine), degenerative, and vertebral spondyloptosis caused by Kmmels disease, and primary, and metastatic tumor lesions of the spine. Nowadays, the use of single-level VCR is far beyond its initial purpose.&#x0D; OBJECTIVE: The study aimed to compare features of VCR for rigid deformities of various etiologies and management of erythrocyte blood products in the perioperative period.&#x0D; MATERIALS AND METHODS: A multicenter retrospective observational cohort study analyzed data from 53 adult (aged 18 years) patients with kyphotic and kyphoscoliotic deformities of the thoracic and lumbar spine, distributed into four comparison groups according to the deformity genesis, namely, impaired spinal development, traumatic genesis, degenerative or idiopathic, and neoplasms of the vertebral bodies. The characteristics of VCR in these patients were compared.&#x0D; RESULTS: The surgery duration was longer in VCR for spinal neoplasms (p 0.05) than for high-energy burst compression fractures of vertebral bodies and scoliotic deformities (grade IV). On average, this group also had the most cranial osteotomy level among the study groups. VCR for idiopathic scoliotic deformities is characterized by a larger intraoperative blood loss volume than other nosologies, and the differences were statistically significant. In male patients of this group, the hemoglobin level on day 1 after surgery was statistically significantly lower than in those who underwent VCR for compression fractures of the vertebral bodies or impaired vertebral development. During resection of the vertebral column for burst compression fractures of the vertebral bodies, the fixation length was less (p 0.05), with a similar intervention for developmental anomalies, deformities of postoperative genesis, and grade IV idiopathic scoliosis. VCR for grade IV idiopathic scoliosis requires a larger (p 0.05) volume of the reinfused autologous blood than for intervention for acute traumatic pathologies (burst compression fractures of the vertebral bodies).&#x0D; CONCLUSION: The versatility of clinical tasks for which resection of the spinal column can be performed using the VCR technique also determines the significant heterogeneity of the patients who undergo such treatment. Knowledge of the interventions in various nosologies is very useful in vertebrological practice.

Risk of reoperation and infection rate after spine osteotomy and fusion compare with long segment fusion alone

Risk of reoperation and infection rate after spine osteotomy and fusion compare with long segment fusion alone

Tips and Pearls in Spinal Osteotomy

Background and Aim: Spinal osteotomy is a general term for techniques applied to correct spinal deformity. The aims of osteotomy are to create a normal range of spine curvature, pain relief, and to improve quality of life. In the cases where spinal deformities cannot be corrected using instrumentation alone or by facet or ligament release, osteotomy is indicated. In spinal osteotomies, spinal alignment is corrected by removing part of the spinal bone. Osteotomies can be performed as anteroposterior or posterior-only procedures with a greater predilection for posterior-only procedures. Different types of osteotomy are available, including the Smith-Petersen osteotomy (SPO), Ponte osteotomy (PO), pedicle subtraction osteotomy (PSO), corner osteotomy (CO), or bone-disc-bone osteotomy (BDBO), vertebral column decancellation (VCD) and vertebral column resection (VCR). Methods and Materials/Patients: In this narrative study, to provide up-to-date information, we precisely reviewed articles in the osteotomies context. Using the keywords spinal osteotomy, spinal deformity, Smith-Petersen osteotomy (SPO), pedicle subtraction osteotomy (PSO), vertebral column resection (VCR), vertebral column decancellation (VCD), Ponte osteotomy (PO), corner osteotomy (CO), all the relevant articles were retrieved from PubMed, Google Scholar, Medline, and critically reviewed and analyzed. Results: In the spine surgery, osteotomy is performed to correct the deformity in uncorrectable spinal deformity. The suitable type of osteotomy is selected based on the etiology, type, and apex of deformity, surgeon's experience, availability of blood and bleeding control agents, and availability of intensive care. A wider acceptance of posterior-only procedures exists in osteotomy. Conclusion: In spinal deformity surgery, more degrees of correction are needed for better cosmetic results, and for this purpose, spinal osteotomy has a central role. For this reason, all spine surgeons should be familiar with these osteotomy techniques.