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Artikel ; Online: Is Nighttime Bracing Enough to Prevent Curve Progression of Adolescent Idiopathic Scoliosis?

Nagata, Kosei

JAMA network open

2024 Band 7, Heft 1, Seite(n) e2352733

Mesh-Begriff(e)	Humans ; Adolescent ; Scoliosis ; Kyphosis
Sprache	Englisch
Erscheinungsdatum	2024-01-02
Erscheinungsland	United States
Dokumenttyp	Journal Article
ISSN	2574-3805
ISSN (online)	2574-3805
DOI	10.1001/jamanetworkopen.2023.52733
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Estimated number of spine surgeries and related deaths in Japan from 2014 to 2020.

Nagata, Kosei / Chang, Chang / Nishizawa, Mitsuhiro / Yamada, Koji

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association

2024

Abstract: Background: The total number of spine surgeries per year and their related deaths in Japan has not been adequately estimated in the literature.: Methods: We retrospectively reviewed the National Database of Health Insurance Claims and Specific Health ...

Abstract	Background: The total number of spine surgeries per year and their related deaths in Japan has not been adequately estimated in the literature. Methods: We retrospectively reviewed the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) between April 2014 to March 2021, which covers 99.9 % of health insurance claim receipts by general practitioners. The annual number of surgeries was counted using K codes, a procedure classification unique to Japan, and classified into the following six categories; percutaneous vertebroplasty, endoscopic surgery, open discectomy, laminoplasty/laminectomy, instrumentation surgery, and others. The data distribution was also summarized by sex and age. Additionally, by reviewing DPC database-related papers for evaluation of the mortality rate after spine surgery in Japan, the number of spine surgery-related deaths was calculated. Results: The NDB showed that the number of spine surgeries analyzed in this study increased from 170,081 in 2014 to 193,903 in 2019, with a slight decrease in 2020. The ratio of instrumentation surgery increased from 33.0 % in 2014 to 37.9 % in 2020. The rate of patients aged 75 or older increased 31.6 % to 39.6 %. Combining these findings with DPC data showing a mortality rate of 0.1 % to 0.4 % revealed that the estimated number of deaths related to spine surgery in Japan ranged from 200 to 800 per year. Conclusions: Approximately 200,000 spine surgeries and 200 to 800 spine surgery-related inpatient deaths were estimated to have occurred in Japan around 2020.
Sprache	Englisch
Erscheinungsdatum	2024-01-01
Erscheinungsland	Japan
Dokumenttyp	Journal Article
ZDB-ID	1314243-4
ISSN	1436-2023 ; 0949-2658
ISSN (online)	1436-2023
ISSN	0949-2658
DOI	10.1016/j.jos.2023.12.006
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Preoperative Optimization: Risk Factors for Perioperative Complications and Preoperative Modification.

Nagata, Kosei / Dimar, John R / Carreon, Leah Y / Glassman, Steven D

Neurosurgery clinics of North America

2023 Band 34, Heft 4, Seite(n) 505–517

Abstract: Adult spinal deformity (ASD) is common and the complication rate in ASD surgery is high due to its invasiveness. There are several factors that increase the risk of complications with ASD surgery. These include age, past medical history, frailty, ... ...

Abstract	Adult spinal deformity (ASD) is common and the complication rate in ASD surgery is high due to its invasiveness. There are several factors that increase the risk of complications with ASD surgery. These include age, past medical history, frailty, osteoporosis, or operative invasiveness. Risk factors for perioperative complications can be categorized as modifiable and non-modifiable. The purpose of this article is to present the current available evidence on risk factors for perioperative complications, with a focus on frailty, osteoporosis, surgical site infection prevention, and hip-spine syndrome. In addition, we present the latest evidence for patient-specific surgical risk assessment and surgical planning.
Mesh-Begriff(e)	Adult ; Humans ; Frailty ; Risk Factors ; Risk Assessment ; Neurosurgical Procedures ; Osteoporosis
Sprache	Englisch
Erscheinungsdatum	2023-08-07
Erscheinungsland	United States
Dokumenttyp	Journal Article ; Review
ZDB-ID	1196855-2
ISSN	1558-1349 ; 1042-3680
ISSN (online)	1558-1349
ISSN	1042-3680
DOI	10.1016/j.nec.2023.06.015
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Risk Factors for Medial Breach During Robotic-Assisted Cortical Bone Trajectory Screw Insertion.

Nagata, Kosei / Gum, Jeffrey L / Brown, Morgan / Daniels, Christy / Hines, Bren / Carreon, Leah Y / Glassman, Steven D

World neurosurgery

2024 Band 184, Seite(n) e546–e553

Abstract: Objective: We describe the incidence of, and identify the risk factors for, a medial breach of the pedicle wall during robotic-assisted cortical bone trajectory (RA-CBT) screw insertion.: Methods: We analyzed a consecutive series of adult patients ... ...

Abstract	Objective: We describe the incidence of, and identify the risk factors for, a medial breach of the pedicle wall during robotic-assisted cortical bone trajectory (RA-CBT) screw insertion. Methods: We analyzed a consecutive series of adult patients who underwent RA-CBT screw placement from January 2019 to July 2022. To assess the pedicle wall medial breach, postoperative computed tomography (CT) images were analyzed. Patient demographic data and screw data were compared between patients with and without a medial breach. The Hounsfield units (HUs) on the L1 midvertebral axial CT scan was used to evaluate bone quality. Results: Of 784 CBT screws in 145 patients, 30 (3.8%) had a medial breach in 23 patients (15.9%). One screw was grade 2, and the others were grade 1. Patients with a medial breach had a lower HU value compared with the patients without a medial breach (123.3 vs. 150.5; P = 0.027). A medial breach was more common in the right than left side (5.5% vs. 2.0%; P = 0.014). More than one half of the screws with a medial breach were found in the upper instrumented vertebra (UIV) compared with the middle construct or lowest instrumented vertebra (6.7% vs. 1.3% vs. 2.7%; P = 0.003). Binary logistic regression showed that low HU values, right-sided screw placement, and UIV were associated with a medial breach. No patients returned to the operating room for screw malposition. No differences were found in the clinical outcomes between patients with and without a medial breach. Conclusions: The incidence of pedicle wall medial breach was 3.8% of RA-CBT screws in the postoperative CT images. A low HU value measured in the L1 axial image, right-sided screw placement, and UIV were associated with an increased risk of medial breach for RA-CBT screw placement.
Mesh-Begriff(e)	Adult ; Humans ; Robotic Surgical Procedures/adverse effects ; Robotic Surgical Procedures/methods ; Pedicle Screws/adverse effects ; Cortical Bone/diagnostic imaging ; Cortical Bone/surgery ; Risk Factors ; Lumbar Vertebrae/diagnostic imaging ; Lumbar Vertebrae/surgery ; Spinal Fusion/adverse effects ; Spinal Fusion/methods ; Retrospective Studies
Sprache	Englisch
Erscheinungsdatum	2024-02-05
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2024.01.168
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Patients with a large ossification of the posterior longitudinal ligament have a higher incidence of arteriosclerosis in the carotid artery.

Oshima, Yasushi / Doi, Toru / Ohtomo, Nozomu / Ito, Yusuke / Nakajima, Koji / Nagata, Kosei / Kato, So / Taniguchi, Yuki / Matsubayashi, Yoshitaka / Tanaka, Sakae

European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society

2024 Band 33, Heft 2, Seite(n) 379–385

Abstract: Purpose: This study aimed to investigate the impact of the severity of cervical ossification of the posterior longitudinal ligament (OPLL) on the incidence of arteriosclerosis in the carotid artery.: Methods: Patients with OPLL-induced cervical ... ...

Abstract	Purpose: This study aimed to investigate the impact of the severity of cervical ossification of the posterior longitudinal ligament (OPLL) on the incidence of arteriosclerosis in the carotid artery. Methods: Patients with OPLL-induced cervical myelopathy were prospectively enrolled. The study involved analyzing patient characteristics, blood samples, computed tomography scans of the spine, and intima-media thickness (IMT) measurements of the common carotid artery. Patients were divided into two groups based on the size of the cervical OPLL to compare demographic data, comorbidities, and the presence of thickening of the carotid intima-media (max IMT ≥ 1.1 mm). Results: The study included 96 patients (mean age: 63.5 years; mean body mass index: 26.9 kg/m Conclusions: Patients with a larger cervical OPLL showed a higher frequency of intima-media thickening in the carotid artery.
Mesh-Begriff(e)	Humans ; Male ; Middle Aged ; Female ; Longitudinal Ligaments ; Carotid Intima-Media Thickness ; Incidence ; Osteogenesis ; Carotid Artery, Common ; Ossification of Posterior Longitudinal Ligament/diagnostic imaging ; Ossification of Posterior Longitudinal Ligament/epidemiology ; Arteriosclerosis
Sprache	Englisch
Erscheinungsdatum	2024-01-16
Erscheinungsland	Germany
Dokumenttyp	Journal Article
ZDB-ID	1115375-1
ISSN	1432-0932 ; 0940-6719
ISSN (online)	1432-0932
ISSN	0940-6719
DOI	10.1007/s00586-023-08107-3
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Comparison of No Tap (two-step) and tapping robotic assisted cortical bone trajectory screw insertion.

Werthmann, Neil J / Gum, Jeffrey L / Nagata, Kosei / Djurasovic, Mladen / Glassman, Steven D / Owens, R Kirk / Crawford, Charles H / Carreon, Leah Y

Journal of robotic surgery

2024 Band 18, Heft 1, Seite(n) 204

Abstract: Workflow for cortical bone trajectory (CBT) screws includes tapping line-to-line or under tapping by 1 mm. We describe a non-tapping, two-step workflow for CBT screw placement, and compare the safety profile and time savings to the Tap (three-step) ... ...

Abstract	Workflow for cortical bone trajectory (CBT) screws includes tapping line-to-line or under tapping by 1 mm. We describe a non-tapping, two-step workflow for CBT screw placement, and compare the safety profile and time savings to the Tap (three-step) workflow. Patients undergoing robotic assisted 1-3 level posterior fusion with CBT screws for degenerative conditions were identified and separated into either a No-Tap or Tap workflow. Number of total screws, screw-related complications, estimated blood loss, operative time, robotic time, and return to the operating room were collected and analyzed. There were 91 cases (458 screws) in the No-Tap and 88 cases (466 screws) in the Tap groups, with no difference in demographics, revision status, ASA grade, approach, number of levels fused or diagnosis between cohorts. Total robotic time was lower in the No-Tap (26.7 min) versus the Tap group (30.3 min, p = 0.053). There was no difference in the number of malpositioned screws identified intraoperatively (10 vs 6, p = 0.427), screws converted to freehand (3 vs 3, p = 0.699), or screws abandoned (3 vs 2, p = 1.000). No pedicle/pars fracture or fixation failure was seen in the No-Tap cohort and one in the Tap cohort (p = 1.00). No patients in either cohort were returned to OR for malpositioned screws. This study showed that the No-Tap screw insertion workflow for robot-assisted CBT reduces robotic time without increasing complications.
Mesh-Begriff(e)	Humans ; Robotic Surgical Procedures/methods ; Robotic Surgical Procedures/instrumentation ; Male ; Female ; Middle Aged ; Cortical Bone/surgery ; Aged ; Spinal Fusion/methods ; Spinal Fusion/instrumentation ; Operative Time ; Bone Screws ; Workflow ; Pedicle Screws ; Adult
Sprache	Englisch
Erscheinungsdatum	2024-05-08
Erscheinungsland	England
Dokumenttyp	Journal Article ; Comparative Study
ZDB-ID	2268283-1
ISSN	1863-2491 ; 1863-2483
ISSN (online)	1863-2491
ISSN	1863-2483
DOI	10.1007/s11701-024-01890-1
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel: Skipping Pedicle Screw Insertion Into Infected Vertebra is a Risk Factor for Revision Surgery for Pyogenic Spondylitis in the Lower Thoracic and Lumbar Spine.

Nagata, Kosei / Ando, Takeshi / Sasaki, Katsuyuki / Urayama, Daiki

International journal of spine surgery

2020 Band 14, Heft 6, Seite(n) 989–995

Abstract: Background: Surgical intervention for pyogenic spondylitis is indicated when conservative treatment fails and biomechanical instability persists. Whether to insert pedicle screws into all vertebrae, including the most erosive vertebrae, or whether to ... ...

Abstract	Background: Surgical intervention for pyogenic spondylitis is indicated when conservative treatment fails and biomechanical instability persists. Whether to insert pedicle screws into all vertebrae, including the most erosive vertebrae, or whether to skip 1 vertebra in pedicle screw insertion remains controversial. Methods: A single-institution retrospective cohort study was conducted in consecutive patients with pyogenic spondylitis in the lower thoracic and lumbar spine (T9-S1) between January 2008 and December 2016. The patients were treated with interbody fusion plus posterior stabilization using pedicle screws and were divided into 2 groups as follows: (1) patients in whom 1 vertebra, usually the most erosive, was skipped in pedicle screw insertion (Group Skipping) and (2) pedicle screw insertion into all vertebrae (Group All). Patients' operation data were evaluated, and clinical outcomes were compared between the 2 groups. There were no significant differences between the 2 groups in terms of age, sex, past histories, blood loss, operation time, the presence of abscesses, or operative approach. Results: The length of fixation was greater by 1 vertebral level in the Group Skipping than in the Group All, and the rate of revision surgery for pseudarthrosis was higher in the Group Skipping than in the Group All ( Conclusions: Skipping pedicle screw insertion for pyogenic spondylitis in posterior fixation led to an increased number of fixed vertebrae and may be a risk factor for revision surgery for pseudarthrosis. Level of evidence: 4. Clinical relevance: The insertion of short pedicle screws at the infected vertebra can prevent early treatment failure and increase the biomechanical stability of construct.
Sprache	Englisch
Erscheinungsdatum	2020-12-29
Erscheinungsland	Netherlands
Dokumenttyp	Journal Article
ISSN	2211-4599
ISSN	2211-4599
DOI	10.14444/7148
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Normative Bone Mineral Density Measured on Computed Tomography Scans in Children and Adolescents.

Nagata, Kosei / Dimar, John R / Glassman, Steven D / Schmidt, Grant O / Brown, Morgan E / Daniels, Christy L / Carreon, Leah Y

Spine

2023 Band 49, Heft 3, Seite(n) 214–219

Abstract: Study design: Retrospective chart review.: Objective: To provide reference values for Hounsfield unit (HU) measured on computed tomography (CT) scans of children and adolescents.: Summary of background data: Spine surgeons increasingly use HU on ... ...

Abstract	Study design: Retrospective chart review. Objective: To provide reference values for Hounsfield unit (HU) measured on computed tomography (CT) scans of children and adolescents. Summary of background data: Spine surgeons increasingly use HU on spine CT as a measure of bone mineral density (BMD). This has not been described in children and adolescents. Patients and methods: Pediatric patients who had a spine CT between 2012 and 2022 were identified. Patients who had more than 1 comorbidity or were syndromic were excluded. Using the bone window, 3 axial images (cephalad, middle, and caudal) of each vertebra were selected. In each axial view, the HU was measured using a "region of interest" (ROI) that included the total cancellous bone area and an ROI excluding the radiolucency present in the posterior vertebral body ("total" vs . "limited"). HU values were compared between total and limited areas and between the axial images at the cephalad, middle, and caudal levels. Each age category data were estimated and stratified. Results: A total of 144 patients (79 females and 65 males) from 2 to 17 years old were included. Mean limited HU was consistently lower than total HU across all images and lumbar levels except for L1. Limited HU taken mid-vertebral body was also consistently lower than those taken cephalad or caudad. Mean limited HU across all ages including all levels was 227 ± 50 (range: 109-357). Stratifying by age showed a gradual decrease in BMD from age 2 to 10 followed by an increase. Conclusions: This is the first study to measure HU on lumbar CTs in children and adolescents. The technique of measuring BMD in adults should be modified in children by using an ROI that excludes the rarefaction present in the posterior vertebral body. Further studies are needed to evaluate the age-dependent changes in BMD seen in this study.
Mesh-Begriff(e)	Adult ; Male ; Female ; Humans ; Adolescent ; Child ; Child, Preschool ; Bone Density ; Osteoporosis ; Retrospective Studies ; Lumbar Vertebrae ; Tomography, X-Ray Computed/methods ; Absorptiometry, Photon/methods
Sprache	Englisch
Erscheinungsdatum	2023-03-22
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	752024-4
ISSN	1528-1159 ; 0362-2436
ISSN (online)	1528-1159
ISSN	0362-2436
DOI	10.1097/BRS.0000000000004637
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Comparison of Bone Mineral Density in Children and Adolescents on CT Versus DEXA Scan.

Nagata, Kosei / Glassman, Steven D / Dimar, John R / Cabell, Akaila / Brown, Morgan / Daniels, Christy / Schmidt, Grant O / Carreon, Leah Y

Spine

2023

Abstract: Study design: Retrospective cross-sectional.: Objectives: To determine associations between Hounsfield Units (HU) within a Region of interest (ROI) on CT scans and Dual Energy X-ray Absorptiometry (DEXA) measurements in children and adolescents.: ... ...

Abstract	Study design: Retrospective cross-sectional. Objectives: To determine associations between Hounsfield Units (HU) within a Region of interest (ROI) on CT scans and Dual Energy X-ray Absorptiometry (DEXA) measurements in children and adolescents. Summary of background data: HU on CT scans as a proxy for bone mineral density (BMD) is widely used in adults. However, the utility of CT as a proxy for BMD have not been evaluated in children and adolescents. Methods: Patients younger than 18 years with a lumbar spine CT scan and a DEXA within 6 months of each other were identified. A ROI was used to measure the HU at each lumbar vertebral body on mid-axial cuts. Charts were reviewed for demographics, medical co-morbidities and DEXA reports. Correlation coefficients were calculated between mean DEXA Z-score and HU value. Patients were also stratified by Z-score (≥ -1.0, between -1.0 and -2.0, and ≤-2.0) and matched by age and BMI to a cohort of healthy children and compared. Results: A moderate correlation between mean DEXA Z-score and mean HU on CT was found (r2=0.42, P<0.001). After matching for age and BMI, 21 patients in each group between the age of 4 and 17 years were analyzed. The mean HU value of the control group was 231.69. When stratified by Z-score (≥ -1.0, between -1.0 and -2.0, and ≤-2.0), the mean HU values were 244.59, 216.50, and 176.54, respectively. Patients with a Z-score of ≤-2.0 had a significantly lower mean HU than age matched controls. Conclusions: HU on lumbar CT in children and adolescents with DEXA Z-scores less than -2.0, were lower when compared to healthy age and BMI matched controls. This study suggests that HU on opportunistic CT scans of the spine may be used as a reasonable proxy for BMD in the pediatric population.
Sprache	Englisch
Erscheinungsdatum	2023-11-16
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	752024-4
ISSN	1528-1159 ; 0362-2436
ISSN (online)	1528-1159
ISSN	0362-2436
DOI	10.1097/BRS.0000000000004877
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Clinical and Radiographic Outcomes of Repair of Spondylolitic Spondylolisthesis via Direct Pars Repair.

Nagata, Kosei / Dimar, John R / Smith, Nolan Sledge / Puno, Rolando M / Glassman, Steven D / Djurasovic, Mladen / Carreon, Leah Y

Spine

2023

Abstract: Study design: A retrospective chart review.: Objective: The objective of this study is to investigate whether direct pars repair achieves bone healing and symptom relief in patients with spondylolitic spondylolisthesis.: Summary of background data!# ...

Abstract	Study design: A retrospective chart review. Objective: The objective of this study is to investigate whether direct pars repair achieves bone healing and symptom relief in patients with spondylolitic spondylolisthesis. Summary of background data: While most cases of spondylolysis can be managed non-operatively, a small percentage of patients require surgical intervention. The outcome of direct pars repair via a standard pedicle-screw with wiring technique is controversial in patients with lumbar spondylolitic spondylolisthesis. Methods: Medical records of patients who had undergone an open surgical pars repair were retrospectively reviewed. Standard demographic and surgical parameters were collected. All patients underwent a primary repair of the pars with autograft or bone morphogenetic protein and instrumentation using a pedicle-screw with spinous process wiring. At 6-12 months after surgery, patient's pain symptoms and postoperative CT scans were independently reviewed to assess healing; graded as non-union, partial union, or solid union. Results: There were 68 patients identified (33 male and 35 female) with an average age of 18.6 years. Mean estimated blood loss was 139 ml, and mean length of hospital stay was 3.7 days. CT evaluation revealed 35 (52%) solid unions, 21 (31%) partial unions, and 12 (18%) non-unions requiring revisions. Thirty-four (50%) patients had no postop pain, 24 (35%) had mild pain, 10 (15%) had persistent pain. The majority of patients with non-unions on CT had mild or persistent pain. Patients with no or mild pain tended to be younger than those with persistent pain (17.5 years vs 24.6 years, P=0.163). Conclusion: This study demonstrated a partial or complete union rate of 82% and a postoperative persistent pain rate of 15%. These figures are comparable to the previous study and this pedicle-screw with wiring technique can be worth trying before interbody fusion for spondylolytic spondylolisthesis to preserve anatomical lumbar motion.
Sprache	Englisch
Erscheinungsdatum	2023-11-28
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	752024-4
ISSN	1528-1159 ; 0362-2436
ISSN (online)	1528-1159
ISSN	0362-2436
DOI	10.1097/BRS.0000000000004886
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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