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Article ; Online: S2 Alar Screw Insertion Accuracy and Factors Associated With Screw Loosening and Lumbosacral Nonunion.

Shima, Koichiro / Fujibayashi, Shunsuke / Otsuki, Bungo / Murata, Koichi / Shimizu, Takayoshi / Sono, Takashi / Matsuda, Shuichi

World neurosurgery

2024 Volume 184, Page(s) e129–e136

Abstract: Objective: To investigate S2 alar screw (S2AS) accuracy and factors associated with S2AS loosening and lumbosacral nonunion.: Methods: We retrospectively reviewed patients who underwent lumbosacral fusion surgery with S2AS addition under fluoroscopy. ...

Abstract	Objective: To investigate S2 alar screw (S2AS) accuracy and factors associated with S2AS loosening and lumbosacral nonunion. Methods: We retrospectively reviewed patients who underwent lumbosacral fusion surgery with S2AS addition under fluoroscopy. S2AS loosening and lumbosacral nonunion were analyzed using a 1-year postoperative computed tomography. S2AS insertion accuracy was originally classified as accurate, short, anterior perforation, lateral perforation, and sacroiliac joint (SIJ) deviation among lateral perforation. Clinical data including sex, age, body mass index, fused segments, fusion procedure, primary or revision surgery, Japanese Orthopedic Association scores and complications were collected. Factors associated with S2AS loosening and lumbosacral nonunion were analyzed. Results: A total of 37 patients (74 screws, age: 63.78 ± 13.57 years, female/male: 14/23 patients, body mass index: 23.11 ± 2.53, fused segments: 1-4 levels, revision: 38%) were included. S2AS loosening and lumbosacral nonunion were observed in 18 screws (13%) and 8 patients (22%) respectively. Only 35 screws (47%) were inserted accurately in our classification. Short, lateral perforation, and anterior perforation were observed in 14 screws (19%), 22 screws (30%), and 3 screws (4.1%). SIJ deviation was seen in 15 screws (20%) Factors associated with S2AS loosening were older age (P = 0.038), fusion levels (P = 0.011), and SIJ deviation (P < 0.001). S2AS loosening affects S1 pedicle screw (S1PS) loosening (P = 0.001). Furthermore, S2AS loosening is a risk factor for lumbosacral nonunion (P = 0.046). Conclusions: S2AS insertion under fluoroscopy is inaccurate. S2AS loosening induces S1PS loosening and lumbosacral nonunion. Surgeons should avoid deviating to SIJ, especially in older patients and relatively longer fusion.
MeSH term(s)	Humans ; Male ; Female ; Aged ; Middle Aged ; Retrospective Studies ; Pedicle Screws ; Tomography, X-Ray Computed ; Spinal Fusion/methods ; Fluoroscopy
Language	English
Publishing date	2024-01-20
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2024.01.071
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Article ; Online: Postoperative function of patients with rheumatoid arthritis after total knee arthroplasty in the last decade was comparable in the unadjusted cohort but inferior in the propensity score matched cohort with that of patients with osteoarthritis.

Nishitani, Kohei / Ito, Hiromu / Murata, Koichi / Kuriyama, Shinichi / Nakamura, Shinichiro / Matsuda, Shuichi

The Knee

2024 Volume 47, Page(s) 228–238

Abstract: Background: The perioperative pain and function of total knee arthroplasty (TKA) in patients with rheumatoid arthritis (RA) approach those in patients with osteoarthritis (OA). This study aimed to evaluate whether the clinical outcomes, especially ... ...

Abstract	Background: The perioperative pain and function of total knee arthroplasty (TKA) in patients with rheumatoid arthritis (RA) approach those in patients with osteoarthritis (OA). This study aimed to evaluate whether the clinical outcomes, especially functions, of patients with RA reached those of OA, utilizing a background-matched cohort. Methods: Patients who underwent TKA between 2013 and 2021 were enrolled. Preoperative and minimum 2-year postoperative scores, specifically the Original Knee Society Score (OKSS) and New Knee Society Score (2011KSS), between RA and OA were compared. Clinical assessments were performed on unadjusted and propensity-score matched cohorts, ensuring age, sex, body mass index, and valgus deformity rate parity. Results: In an unadjusted cohort involving 98 patients with RA and 560 patients with OA, patients with RA demonstrated inferior preoperative OKSS-Function Score (FS) but similar postoperative functional scores to OA patients. In the matched cohort of 83, patients with RA displayed lower preoperative OKSS- FS (median difference: 20, P < 0.001) and 2011KSS functional activities (difference: 9, P = 0.01) beyond minimum clinically important differences than patients with OA. Patients with RA improved more in OKSS-FS, yielding no postoperative difference compared with patients with OA. However, postoperative 2011KSS functional activities remained lower in patients with RA (difference: 9.5, P = 0.03), especially in advanced functions, than in those with OA. Conclusion: Postoperative function showed no difference between patients with RA and OA in the unadjusted cohort; within the background-matched cohort, postoperative function, especially advanced function, was inferior in patients with RA to those with OA.
Language	English
Publishing date	2024-03-05
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1200476-5
ISSN	1873-5800 ; 0968-0160
ISSN (online)	1873-5800
ISSN	0968-0160
DOI	10.1016/j.knee.2023.12.003
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Zs.A 4043: Show issues

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Article ; Online: Pressure Dynamics on Intervertebral Disc Cages in Transforaminal Lumbar Interbody Fusion: A Cadaver Study.

Takaki, Yoshiyama / Tanida, Shimei / Murata, Koichi / Shimizu, Takayoshi / Matsuda, Shuichi / Otsuki, Bungo

World neurosurgery

2024

Abstract: Objective: This study aimed to quantify the change in pressure on the cage during compression manipulation in lumbar interbody fusion. While the procedure involves applying compression between pedicle screws to press the cage against the endplate, the ... ...

Abstract	Objective: This study aimed to quantify the change in pressure on the cage during compression manipulation in lumbar interbody fusion. While the procedure involves applying compression between pedicle screws to press the cage against the endplate, the exact compression force remains elusive. We hypothesize that an intact facet joint might serve as a fulcrum, potentially reducing cage pressure. Methods: Pressure on the intervertebral disc cage was measured during compression manipulation in 4 donor cadavers undergoing lumbar interbody fusion. Unilateral facetectomy models with both normal and parallel compression and bilateral facetectomy models were included. A transforaminal lumbar interbody fusion cage with a built-in load cell measured the compression force. Results: Pressure data from 14 discs indicated a consistent precompression pressure average of 68.16 N. Following compression, pressures increased to 125.99 N and 140.84 N for normal and parallel compression postunilateral facetectomy, respectively, and to 154.58 N and 150.46 N for bilateral models. A strong linear correlation (correlation coefficient: 0.967, P < 0.0001) between precompression and postcompression pressures emphasized the necessity of sufficient precompression pressure for achieving desired postcompression outcomes. None of the data showed a decrease in compression force to the cage with the compression maneuver. Conclusions: Both normal and parallel compression maneuvers effectively increased the pressure on the cage, irrespective of the facet joint resection status. Compression manipulation consistently enhanced compressive force on the cage. However, when baseline pressure is low, the manipulation might not yield significant increases in compression force. This underlines the essential role of meticulous precompression preparation in enhancing surgical outcomes.
Language	English
Publishing date	2024-03-21
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2024.03.080
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Article: Sagittal Section Hounsfield Units of the Upper Instrumented Vertebrae as a Predictor of Proximal Junctional Vertebral Fractures Following Adult Spinal Deformity Surgery.

Murata, Koichi / Otsuki, Bungo / Shimizu, Takayoshi / Sono, Takashi / Fujibayashi, Shunsuke / Matsuda, Shuichi

Asian spine journal

2024

Abstract: Study design: A retrospective observational study.: Purpose: This study aimed to determine an accurate and convenient screening method for predicting proximal junctional fractures (PJFr) following surgery for adult spinal deformity (ASD) using ... ...

Abstract	Study design: A retrospective observational study. Purpose: This study aimed to determine an accurate and convenient screening method for predicting proximal junctional fractures (PJFr) following surgery for adult spinal deformity (ASD) using computed tomography (CT)-based measurement of Hounsfield units (HUs). Overview of literature: CT-based measurement of HUs is an alternative tool for assessing bone mineral density. However, the optimal method for predicting adjacent vertebral fractures following spinal fusion using HUs remains unclear. Methods: This retrospective observational study included 42 patients who underwent reconstructive surgery for ASD. Elliptical regions of interest (ROIs) on the axial section and rectangular ROIs on the sagittal section were placed at the upper instrumented vertebrae (UIV), UIV+1, and UIV+2. In addition, the HU value of the L2 vertebra was used as the representative. Results: PJFr occurred in 28.6% of patients within 2 years following surgery. The HU values obtained from the axial sections of L2, UIV, UIV+1, and UIV+2 were not significantly associated with the incidence of PJFr within 2 years, except for the ROI set in the lower region of the L2 vertebra. However, the HU value of the anterior third of the UIV in the sagittal section was significantly lower in the PJFr group than in the nonPJFr group (87.0 vs. 160.3, p =0.001). A UIV HU value of <100 was associated with a higher incidence of PJFr than an HU vaue of >100 (p <0.05). Conclusions: Measurements of HU in the anterior one-third of the UIV in the sagittal section demonstrated predictive ability for PJFr following ASD surgery. A UIV HU value of <100 emerged as a risk factor for PJFr.
Language	English
Publishing date	2024-04-23
Publishing country	Korea (South)
Document type	Journal Article
ZDB-ID	2559763-2
ISSN	1976-7846 ; 1976-1902
ISSN (online)	1976-7846
ISSN	1976-1902
DOI	10.31616/asj.2023.0339
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Zs.A 6861: Show issues

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Article ; Online: Low hounsfield unit values at sagittal section on computed tomography predicts vertebral fracture following short spinal fusion.

Murata, Koichi / Fujibayashi, Shunsuke / Otsuki, Bungo / Shimizu, Takayoshi / Matsuda, Shuichi

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

2023

Abstract: Background: Preoperative identification of osteoporosis during spine surgery is of critical importance. Additionally, the Hounsfield units (HU) measured using computed tomography (CT) have gained considerable attention. This study aimed to propose a ... ...

Abstract	Background: Preoperative identification of osteoporosis during spine surgery is of critical importance. Additionally, the Hounsfield units (HU) measured using computed tomography (CT) have gained considerable attention. This study aimed to propose a more accurate and convenient screening method for predicting vertebral fractures after spinal fusion in elderly patients by analyzing the HU value of different range of interests of thoracolumbar spine. Methods: Our sample pool for analysis consisted of 137 elderly female patients aged >70 years who underwent one- or two-level spinal fusion surgery with a diagnosis of adult degenerative lumbar disease. The HU values of the anterior 1/3 of the vertebral bodies based on sagittal plane and those of vertebral bodies based on axial plane at T11-L5 were measured using the perioperative CT. The incidence of postoperative vertebral fractures with respect to the HU value was investigated. Results: Vertebral fractures were identified in 16 patients during the mean follow-up period of 3.8 years. While no significant association was found between HU value of L1 vertebral body or minimum HU value from axial plane and the incidence of the postoperative vertebral fracture, the minimum vertebral HU value of the anterior 1/3 of vertebral body from sagittal plane was associated with the incidence of the postoperative vertebral fracture. Patients with a minimum anterior 1/3 vertebral HU value of <80 had a higher incidence of postoperative vertebral fractures. The adjacent vertebral fractures occurred at the level of the vertebra with the lowest HU value, with a high probability. The existence of the vertebra with a minimum HU value of <80 within two levels of upper instrumented vertebrae was a risk factor for adjacent vertebral fracture. Conclusion: HU measurement of the anterior 1/3 of vertebral body predicts the risk of vertebral fracture after short spinal fusion surgery.
Language	English
Publishing date	2023-03-21
Publishing country	Japan
Document type	Journal Article
ZDB-ID	1314243-4
ISSN	1436-2023 ; 0949-2658
ISSN (online)	1436-2023
ISSN	0949-2658
DOI	10.1016/j.jos.2023.03.008
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Zs.A 4484: Show issues

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Article ; Online: The first detection of avian haemosporidia from Culicoides biting midges in Japan, with notes on potential vector species and the transmission cycle

Inumaru, Mizue / Nakamura, Keita / Odagawa, Taichi / Suzuki, Momoka / Murata, Kōichi / Sato, Yukita

Veterinary Parasitology: Regional Studies and Reports. 2023 Apr., v. 39, p. 100840

2023 , Page(s) 100840

Abstract: Biting midges (Ceratopogonidae) are capable of transmitting a variety of pathogens including viruses, trypanosomes and haemosporidia. The majority of Haemoproteus parasites are transmitted by biting midges predominantly of the genus Culicoides and are ... ...

Abstract	Biting midges (Ceratopogonidae) are capable of transmitting a variety of pathogens including viruses, trypanosomes and haemosporidia. The majority of Haemoproteus parasites are transmitted by biting midges predominantly of the genus Culicoides and are known to cause significant physical and reproductive impacts on both wild and domestic birds. In Japan, Haemoproteus had been detected from various avian hosts, but not from arthropod vectors. In this study, we investigated the prevalence of avian haemosporidia at an educational forest in central Japan in attempt to reveal possible vector species of Haemoproteus, which would help to better understand the transmission cycle of Haemoproteus within Japan and to develop preventative measures for captive and domestic birds. Biting midges were caught using UV light traps from 2016 to 2018. The collected samples were morphologically identified, and haemosporidian parasites were detected using PCR-based methods. The detected lineages were phylogenetically analyzed and compared with lineages previously detected from birds. Bloodmeal analyses were also carried out for part of the blood-fed individuals. Six Haemoproteus lineages were detected from 17 of 1042 female Culicoides (1.63%), including three species (C. sigaensis, C. arakawae, and C. pictimargo) in which Haemoproteus was detected for the first time. All detected lineages were placed in the subgenus Parahaemoproteus clade and were previously detected from crows of central Japan, strongly suggesting that parasites of these genetic lineages are transmitted between Culicoides and crows. Two Plasmodium lineages were also detected but are thought to be transmitted between Culex mosquitoes and birds of the educational forest based on previous detections. No amplifications were seen in bloodmeal analysis, possibly due to insufficient amount of blood, denaturation via digestion, or insufficient detectability of the used protocol. Haemoproteus DNA was detected from Culicoides for the first time in Japan, suggesting that transmission is possible within the country. These findings highlight the necessity to investigate Culicoides populations and Haemoproteus infections dynamics in Japan. However, vector competence could not be confirmed in this study and further studies are anticipated.
Keywords	Culex ; Culicoides ; DNA ; Haemoproteus ; Japan ; Plasmodium ; Trypanosoma ; arthropods ; birds ; blood ; blood meal ; denaturation ; digestion ; females ; forests ; phylogeny ; polymerase chain reaction ; ultraviolet radiation ; vector competence ; veterinary parasitology ; Avian haemosporidia ; Biting midge
Language	English
Dates of publication	2023-0208
Size	p. 100840
Publishing place	Elsevier B.V.
Document type	Article ; Online
ISSN	2405-9390
DOI	10.1016/j.vprsr.2023.100840
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Erratum to: Reoperation Rates of Microendoscopic Discectomy Compared With Conventional Open Lumbar Discectomy: A Large-database Study.

Masuda, Soichiro / Fukasawa, Toshiki / Takeuchi, Masato / Fujibayashi, Shunsuke / Otsuki, Bungo / Murata, Koichi / Shimizu, Takayoshi / Matsuda, Shuichi / Kawakami, Koji

Clinical orthopaedics and related research

2024 Volume 482, Issue 3, Page(s) 569

Language	English
Publishing date	2024-02-14
Publishing country	United States
Document type	Journal Article ; Published Erratum
ZDB-ID	80301-7
ISSN	1528-1132 ; 0009-921X
ISSN (online)	1528-1132
ISSN	0009-921X
DOI	10.1097/CORR.0000000000002982
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Article ; Online: Sacral Nerve-Sparing Piecemeal Spondylectomy for Giant Cell Tumor of Bone in the Sacrum: Surgical Strategy and Accurate Tumor Location Identification.

Otsuki, Bungo / Sakamoto, Akio / Fujibayashi, Shunsuke / Shimizu, Takayoshi / Murata, Koichi / Noguchi, Takashi / Matsuda, Shuichi

Spine surgery and related research

2023 Volume 8, Issue 1, Page(s) 110–113

Language	English
Publishing date	2023-09-04
Publishing country	Japan
Document type	Journal Article
ISSN	2432-261X
ISSN (online)	2432-261X
DOI	10.22603/ssrr.2023-0145
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Article ; Online: Preoperative and Postoperative Factors Affecting Patient Satisfaction with Double-Door Laminoplasty for Cervical Spondylotic Myelopathy.

Yoshiyama, Takaki / Fujibayashi, Shunsuke / Otsuki, Bungo / Shimizu, Takayoshi / Murata, Koichi / Matsuda, Shuichi

Spine surgery and related research

2023 Volume 7, Issue 5, Page(s) 421–427

Abstract: Introduction: Few articles have investigated patient satisfaction with laminoplasty in patients with cervical spondylotic myelopathy (CSM) alone, excluding other diseases, such as ossification of the posterior longitudinal ligament. In this study, we ... ...

Abstract	Introduction: Few articles have investigated patient satisfaction with laminoplasty in patients with cervical spondylotic myelopathy (CSM) alone, excluding other diseases, such as ossification of the posterior longitudinal ligament. In this study, we aimed to investigate patient satisfaction after double-door laminoplasty for CSM and determine the preoperative and postoperative factors that affect patient satisfaction. Methods: We retrospectively reviewed cases of laminoplasty for CSM. We measured sagittal imaging parameters (cervical lordosis [CL], C2-C7 cervical sagittal vertical axis [cSVA], and T1 slope [T1S]), Japanese Orthopaedic Association (JOA) score, and patient-reported outcomes (PROs) such as the neck disability index (NDI) and visual analog scale (VAS) preoperatively, 3 months postoperatively, and 1 year postoperatively. In addition, a multiple regression analysis was performed to investigate factors affecting patient satisfaction. Results: Ninety patients were included in the analysis. After surgery, CL decreased significantly (p<0.01), whereas cSVA increased significantly (p<0.01). No significant differences were observed in the preoperative and postoperative T1S values (p=0.61). The JOA, NDI, and VAS scores significantly improved postoperatively (p<0.01). The median patient satisfaction was 85 (range, 12-100) at 1 year postoperatively and 80 (range, 25-100) at 3 months postoperatively. In the multiple regression analysis, lower-extremity sensory disorder in the JOA score at 1 year postoperatively (p<0.01) and VAS scores for neck pain preoperatively and 1 year postoperatively (p=0.01 and p<0.01, respectively) were determined as factors affecting patient satisfaction. Conclusions: Cervical laminoplasty is a useful and satisfactory surgical procedure to restore patient function. However, patients with severe preoperative and postoperative neck pain and those with severe postoperative sensory disorders of the lower extremities may be less satisfied with the procedure. It is important to keep these things in mind when treating patients.
Language	English
Publishing date	2023-04-21
Publishing country	Japan
Document type	Journal Article
ISSN	2432-261X
ISSN (online)	2432-261X
DOI	10.22603/ssrr.2023-0022
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Article ; Online: The first detection of avian haemosporidia from Culicoides biting midges in Japan, with notes on potential vector species and the transmission cycle.

Inumaru, Mizue / Nakamura, Keita / Odagawa, Taichi / Suzuki, Momoka / Murata, Koichi / Sato, Yukita

Veterinary parasitology, regional studies and reports

2023 Volume 39, Page(s) 100840

Abstract: Background: Biting midges (Ceratopogonidae) are capable of transmitting a variety of pathogens including viruses, trypanosomes and haemosporidia. The majority of Haemoproteus parasites are transmitted by biting midges predominantly of the genus ... ...

Abstract	Background: Biting midges (Ceratopogonidae) are capable of transmitting a variety of pathogens including viruses, trypanosomes and haemosporidia. The majority of Haemoproteus parasites are transmitted by biting midges predominantly of the genus Culicoides and are known to cause significant physical and reproductive impacts on both wild and domestic birds. In Japan, Haemoproteus had been detected from various avian hosts, but not from arthropod vectors. In this study, we investigated the prevalence of avian haemosporidia at an educational forest in central Japan in attempt to reveal possible vector species of Haemoproteus, which would help to better understand the transmission cycle of Haemoproteus within Japan and to develop preventative measures for captive and domestic birds. Methods: Biting midges were caught using UV light traps from 2016 to 2018. The collected samples were morphologically identified, and haemosporidian parasites were detected using PCR-based methods. The detected lineages were phylogenetically analyzed and compared with lineages previously detected from birds. Bloodmeal analyses were also carried out for part of the blood-fed individuals. Results: Six Haemoproteus lineages were detected from 17 of 1042 female Culicoides (1.63%), including three species (C. sigaensis, C. arakawae, and C. pictimargo) in which Haemoproteus was detected for the first time. All detected lineages were placed in the subgenus Parahaemoproteus clade and were previously detected from crows of central Japan, strongly suggesting that parasites of these genetic lineages are transmitted between Culicoides and crows. Two Plasmodium lineages were also detected but are thought to be transmitted between Culex mosquitoes and birds of the educational forest based on previous detections. No amplifications were seen in bloodmeal analysis, possibly due to insufficient amount of blood, denaturation via digestion, or insufficient detectability of the used protocol. Conclusion: Haemoproteus DNA was detected from Culicoides for the first time in Japan, suggesting that transmission is possible within the country. These findings highlight the necessity to investigate Culicoides populations and Haemoproteus infections dynamics in Japan. However, vector competence could not be confirmed in this study and further studies are anticipated.
MeSH term(s)	Female ; Animals ; Ceratopogonidae ; Japan/epidemiology ; Mosquito Vectors ; Haemosporida/genetics ; Birds
Language	English
Publishing date	2023-02-08
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	2405-9390
ISSN (online)	2405-9390
DOI	10.1016/j.vprsr.2023.100840
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