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Kasai Y, Paholpak P, Wisanuyotin T, Sukitthanakornkul N, Hanarwut P, Chaiyamoon A, Iamsaard S, Nishimura A. Are enlarged peroneal tubercle and accessory anterolateral talar facet associated with calcaneal spur? J Orthop Surg Res 2024; 19:235. [PMID: 38610053 PMCID: PMC11015629 DOI: 10.1186/s13018-024-04718-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 04/05/2024] [Indexed: 04/14/2024] Open
Abstract
BACKGROUND As the anatomical variations of the foot, enlarged peroneal tubercle (EPT) and accessory anterolateral talar facet (AALTF) have attracted the attention of foot surgeons in recent years. However, EPT and AALTF have not been examined for a relationship with calcaneus spur (CS) as a common osteophyte. METHODS The subjects were 369 individuals who died in northeastern Thailand and were preserved as skeletal specimens. The authors examined for the presence of left and right EPT, AALTF, and calcaneus spur (CS). We divided the EPT (+) group with EPT and the EPT (-) group without it and also divided the AALTF (+) group with AALTF and the AALTF (-) group without it. The age at death and the presence of CS were compared statistically between the EPT (+) and EPT (-) groups and between the AATLF (+) and AALTF (-) groups. RESULTS Out of the total 369 cases, EPT was found in 117 cases (31.7%), AALTF was positive in 91 cases (24.7%), and CS was found in 194 cases (52.3%). In comparison between EPT (+) and EPT (-) groups, CS was significantly higher (p < 0.0001) in the EPT (+) group, but there was no significant difference in age at death. In comparison between AALTF (+) and AALTF (-) groups, there was no significant difference in age at death or CS. CONCLUSION This study showed a strong relationship between EPT and CS, and the prevalence of EPT and AALTF by age in Thailand was first reported. We believe it helps to know the pathogenesis and biomechanism of EPT and AALTF. TRIAL REGISTRATION Not applicable.
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Affiliation(s)
- Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, 123 Moo 16 Mittraphap Rd., Nai-Muang, Muang District, Khon Kaen, 40002, Thailand.
| | - Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, 123 Moo 16 Mittraphap Rd., Nai-Muang, Muang District, Khon Kaen, 40002, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, 123 Moo 16 Mittraphap Rd., Nai-Muang, Muang District, Khon Kaen, 40002, Thailand
| | | | - Parika Hanarwut
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Arada Chaiyamoon
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Sitthichai Iamsaard
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Akinobu Nishimura
- Department of Orthopaedic and Sports Medicine, Graduate School of Medicine, Mie University, Tsu, Japan
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Paholpak P, Morimoto T, Wisanuyotin T, Sirichativapee W, Sirichativapee W, Kosuwon W, Kasai Y, Murakami H. Clinical and oncologic outcomes of posterior only total en bloc spondylectomy for spinal metastasis involving third lumbar vertebra: A case series. Medicine (Baltimore) 2024; 103:e37145. [PMID: 38306532 PMCID: PMC10843243 DOI: 10.1097/md.0000000000037145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 01/11/2024] [Indexed: 02/04/2024] Open
Abstract
INTRODUCTION A posterior-only total en bloc spondylectomy (TES) of the L3 level was deemed a highly intricate surgical procedure, necessitating the preservation of the L3 nerve root to prevent neurological deterioration. Despite bilateral preservation efforts of the L3 nerve roots, neurological deterioration proved unavoidable. This study aims to present the clinical, neurologic, and oncologic outcomes of spinal metastasis patients who underwent a posterior-only approach TES, encompassing the L3 vertebra. MATERIALS AND METHODS All patients with L3-involved spinal metastasis undergoing posterior TES between January 2018 and January 2022 were investigated. The primary outcomes considered were the local recurrence rate and manual muscle testing of the lumbar myotome. Secondary outcomes included Frankel neurological status, operative time, blood loss, perioperative and postoperative complications, and Eastern Cooperative Oncology Group score. RESULTS Five patients with TES involving L3 (three females) met the inclusion criteria. All patients had solitary metastases (three in the lungs, 2 in the breasts). Postoperatively, all patients experienced weakness of the hip flexors, but they were able to ambulate independently 12 months after surgery. One patient exhibited adjacent segment (L2) disease progression and underwent corpectomy 18 months after TES. No local recurrences at the surgical site were detected on magnetic resonance imaging at the 1-year follow-up. CONCLUSION Posterior-only TES for L3-involved vertebrae yielded excellent results in the local control of metastatic disease. Despite hip flexor weakness, all patients were able to regain independent ambulation after 12 months. TES can offer favorable clinical and oncological outcomes in patients with solitary spinal metastases.
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Affiliation(s)
- Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Tadatsugu Morimoto
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Saga University, Saga, Japan
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Wilasinee Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Weerachai Kosuwon
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Hideki Murakami
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Nagoya city University, Nagoya, Japan
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Kato T, Inaba T, Baba S, Morimoto T, Mizuno T, Kasai Y, Wisanuyotin T, Sirichativapee W, Kosuwon W, Paholpak P. Experimental Study of Failures of the Rigid Spinal Posterior Fixation System Under Compressive Load Conditions: A Cadaver Study. Cureus 2024; 16:e53961. [PMID: 38469026 PMCID: PMC10925939 DOI: 10.7759/cureus.53961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/08/2024] [Indexed: 03/13/2024] Open
Abstract
Background Many studies have been conducted on the biomechanics of the spine to elucidate the fixation properties of spinal fusion surgery and the causes of instrumentation failure. Among these studies, there are some studies on load sharing in the spine and measurement using strain gauges and pressure gauges, but there is a lack of research on axial compressive loads. Methods Axial compressive load tests were performed on human cadaveric injured lumbar vertebrae fixed with pedicle screws (PS). Both the strain generated in the PS rod and the intradiscal pressure were measured. Subsequently, the stress generated in the PS rod and the load sharing of the spine and instrumentation were calculated. Results Even when only compressive load is applied, bending stress of more than 10 times the compression stress was generated in the rod, and the stress tended to concentrate on one rod. Rod deformation becomes kyphotic, in contrast to the lordotic deformation behavior of the lumbar spine. The stress shielding rate was approximately 40%, less than half. Conclusions This study obtained basic data useful for constructing and verifying numerical simulations that are effective for predicting and elucidating the causes of dislodgement and failure of spinal implants.
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Affiliation(s)
- Takaya Kato
- Department of Social Innovation, Graduate School of Regional Innovation Studies, Mie University, Tsu, JPN
| | - Tadashi Inaba
- Department of Mechanical Engineering, Graduate School of Engineering, Mie University, Tsu, JPN
| | - Sotaro Baba
- Department of Mechanical Engineering, Graduate School of Engineering, Mie University, Tsu, JPN
| | - Tadatsugu Morimoto
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, JPN
| | - Tetsutaro Mizuno
- Department of Orthopaedic Surgery, Seirei Hamamatsu General Hospital, Hamamatsu, JPN
| | - Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, THA
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, THA
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, THA
| | - Weerachai Kosuwon
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, THA
| | - Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, THA
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Kasai Y, Okabayashi R, Aoki K. Femoral Shaft Fracture Developed Late-Onset Infection in 27 Years after Intramedullary Nailing: A Case Report. J Long Term Eff Med Implants 2024; 34:13-17. [PMID: 38505888 DOI: 10.1615/jlongtermeffmedimplants.2023048585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Postoperative late-onset infections more than 1 year after intramedullary nail surgery for femoral shaft fractures are very rare. We show an extremely rare case of developed late-onset infection 27 years after surgery, report on risk factors for late-onset infection, and infer why the infection occurred.
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Affiliation(s)
| | - Ryo Okabayashi
- Department of Orthopaedic Surgery, Aoyama General Hospital, Toyokawa City, Aichi Prefecture, Japan
| | - Kentaro Aoki
- Department of Orthopaedic Surgery, Aoyama General Hospital, Toyokawa City, Aichi Prefecture, Japan
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Poodendan C, Suwannakhan A, Chawalchitiporn T, Kasai Y, Nantasenamat C, Yurasakpong L, Iamsaard S, Chaiyamoon A. Morphometric analysis of dry atlas vertebrae in a northeastern Thai population and possible correlation with sex. Surg Radiol Anat 2023; 45:175-181. [PMID: 36602583 DOI: 10.1007/s00276-022-03076-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023]
Abstract
PURPOSE The uppermost segment of the cervical vertebra or atlas (C1) is a critically important anatomical structure, housing the medulla oblongata and containing the grooves for the C1 spinal nerve and the vertebral vessels. Variations of the C1 vertebra can affect upper spine stability, and morphometric parameters have been reported to differ by population. However, there are few data regarding these parameters in Thais. The use of this bone to predict sex and age has never been reported. METHODS This study aimed to examine C1 morphometry and determine its ability to predict sex. Twelve diameter parameters were taken from the C1 vertebrae of identified skeletons (n = 104, males [n, 54], females [n, 50]). Correlation analysis was also performed for sex and age, which were predicted using machine learning algorithms. RESULTS The results showed that 8 of the 12 measured parameters were significantly longer in the male atlas (p < 0.05), while the remaining 4 (distance between both medial-most edges of the transverse foramen, transverse dimension of the superior articular surface, frontal plane passing through the canal's midpoint, and anteroposterior dimension of the inferior articular surface) did not differ significantly by sex. There was no statistically significant difference in these parameters on the lateral side. The decision stump classifier was trained on C1 parameters, and the resulting model could predict sex with 82.6% accuracy (root mean square error = 0.38). CONCLUSION Assertation of the morphometric parameters of the atlas is important for preoperative assessment, especially for the treatment of atlas dislocation. Our findings also highlighted the potential use of atlas measurements for sex prediction.
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Affiliation(s)
- Chanasorn Poodendan
- Department of Anatomy, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand
| | - Athikhun Suwannakhan
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.,In Silico and Clinical Anatomy Research Group (iSCAN), Bangkok, 10400, Thailand
| | - Tidarat Chawalchitiporn
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Yuichi Kasai
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Mitraparp Road, Khon Kaen, Thailand
| | | | - Laphatrada Yurasakpong
- Princess Srisavangavadhana College of Medicine, Chulabhorn Royal Academy, Bangkok, 10210, Thailand
| | - Sitthichai Iamsaard
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.
| | - Arada Chaiyamoon
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.
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Kasai Y, Paholpak P, Wisanuyotin T, Sukitthanakornkul N, Hanarwut P, Chaiyamoon A, Iamsaard S, Mizuno T. Response to: Incidence and Skeletal Features of Developmental Cervical and Lumbar Spinal Stenosis. Asian Spine J 2023; 17:228-229. [PMID: 36849246 PMCID: PMC9977981 DOI: 10.31616/asj2023.0004.r2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 01/19/2023] [Indexed: 03/01/2023] Open
Affiliation(s)
- Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand,Corresponding author: Permsak Paholpak Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand Tel: +66-43348398, Fax: +66-43348398, E-mail:
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | | | - Parika Hanarwut
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Arada Chaiyamoon
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Sitthichai Iamsaard
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Tetsutaro Mizuno
- Department of Orthopaedic Surgery, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
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Paholpak P, Wisanuyotin T, Sirichativapee W, Sirichativapee W, Kosuwon W, Wongratanacheewin J, Sangsin A, Kasai Y, Murakami H. Clinical results of total en bloc spondylectomy using a single posterior approach in spinal metastasis patients: Experiences from Thailand. Asia Pac J Clin Oncol 2023; 19:96-103. [PMID: 35590383 DOI: 10.1111/ajco.13778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 03/17/2022] [Indexed: 01/20/2023]
Abstract
AIM To demonstrate a single posterior approach, total en bloc spondylectomy (TES) could be performed safely without preoperative embolization in spinal metastasis patients. MATERIALS AND METHODS Thirteen solitary spinal metastasis patients (five males) underwent single posterior approach TES at the thoracolumbar spine without preoperative embolization from January 2018 to January 2020. The primary sites were the breast (n = 4), hepatocellular carcinoma (n = 2), colon (n = 2), and others (n = 5). All patients underwent single posterior TES. The Eastern Cooperative Oncology Group, Frankel neurological status, operative time and blood loss, and any complications were all recorded. The patients were regularly followed-up with radiography, computed tomography, and magnetic resonance imaging to detect any local recurrences. RESULTS The mean operative time was 354.6 min, and the mean operative blood loss was 2134.62 ml. None of the patients experienced any perioperative complications. Within the follow-up period (3-24 months), no local recurrences were detected. Two patients (15.38%) were found to have distant metastasis to adjacent and remote vertebrae. Three patients were lost to follow-up, and three patients died of disease. Six patients showed an improved ECOG functional status by at least one grade. Four of Frankel A patients improved their neurological status by at least one grade. CONCLUSION Even without embolization, single posterior TES at the thoracolumbar spine is safe and effective for short-term local control in solitary spinal metastasis. However, TES cannot prevent distant metastasis. Longer-term follow-up studies will be able to further identify the benefits of TES for the long-term local control of diseases.
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Affiliation(s)
- Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Wilasinee Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Weerachai Kosuwon
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Janista Wongratanacheewin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Apiruk Sangsin
- Department of Orthopaedics, Faculty of Medicine, Chiangmai University, Chiangmai, Thailand
| | - Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Hideki Murakami
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
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Meekaew P, Paholpak P, Wisanuyotin T, Sirichativapee W, Sirichativapee W, Kosuwon W, Kasai Y. Biomechanics comparison between endobutton fixation and syndesmotic screw fixation for syndesmotic injury ankle fracture; a finite element analysis and cadaveric validation study. J Orthop 2022; 34:207-214. [PMID: 36104991 PMCID: PMC9465022 DOI: 10.1016/j.jor.2022.08.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 08/08/2022] [Accepted: 08/17/2022] [Indexed: 11/22/2022] Open
Abstract
Introduction Various syndesmotic fixation methods in ankle injury are recommended; however, a lack of biomechanical information persists regarding the stiffness of the fixation methods. The current study thus aimed to assess biomechanical cadaveric validation and perform a finite element analysis of syndesmotic fixation comparing endobutton vs. screw after syndesmotic injury with an ankle fracture. Method Five pairs of ankles of fresh cadavers were used for the validity test for Anterior Inferior Tibiofibular Ligament (AITFL), Posterior Inferior Tibiofibular Ligament (PITFL), and Interosseous ligament biomechanics properties. Four finite element models (FEM) were created: an intact model, a fracture model with/without syndesmotic injury, an endobutton fixation model, and a syndesmotic screw fixation model. Each FEM was tested vis-à-vis external rotation force, anteroposterior translation force, and compression force until model failure. The primary outcomes were stiffness and force until failure. Result The respective anteroposterior translation force for the stiffness of the intact model, the screw fixation model, and the endobutton fixation was 8.14, 9.15, and 8.17 N/mm. The respective external rotation force for the stiffness of intact, screw fixation, and endobutton model was 0.927,0.949, and 0.940 Nm/degree. The respective stress under compression force in the intact, screw fixation, and endobutton model was 39.94,25.59, and 37.30 MPa. Conclusion Both screw and endobutton fixation models provided more translation, compression, and rotation stability than normal syndesmosis, but the screw model provided greater translation and compression force stability than the endobutton model. There was no difference in rotational stability between the two models. We thus recommend the same rehabilitation protocol for both fixation methods; however, vigorous translation and compression should be avoided when using endobutton fixation.
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Affiliation(s)
- Papangkorn Meekaew
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | | | - Weerachai Kosuwon
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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Kasai Y, Paholpak P, Wisanuyotin T, Sirichativapee W, Oo SK, Thu S. Current status and problems of orthopaedic residents in Thailand and Myanmar. MedEdPublish 2022; 12:10. [PMID: 36168530 PMCID: PMC9370081 DOI: 10.12688/mep.18989.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2022] [Indexed: 11/20/2022] Open
Abstract
Background: There is no research about current experiences of orthopaedic residents in Thailand and Myanmar. Methods: A questionnaire survey was distributed among Thai and Myanmar orthopaedic residents to assess their current experiences. This study included a total of 168 participants, comprising 92 orthopaedic residents in Thailand, and 76 in Myanmar who answered the questionnaire. The survey comprised nine questions about issues such as the contents of residency training programs, current training satisfaction, and future careers. The survey was administered anonymously between October 2020 and January 2021. Results: Regarding training content, 24 residents (14.3%) reported being "very satisfied", 103 (61.3%) were "satisfied", 37 (22.0%) were "moderately satisfied", and four (2.4%) were "dissatisfied", and respondents spent a mean of 3.1 h/day reading textbooks and research papers. As for salary, five (3.0%) residents answered "satisfied", 46 (27.4%) responded "moderately satisfied", and 117 (69.6%) were "dissatisfied". Conclusions: Many orthopedic residents in Thailand and Myanmar were enthusiastic about and satisfied with their training. Their only problem was that the salary was low.
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Affiliation(s)
- Yuichi Kasai
- Department of Orthopaedics, Khon Kaen University Faculty of Medicine, Khon Kaen, 40002, Thailand
- Department of Orthopaedic Surgery, University of Medicine 1, Yangon, Myanmar
- Department of Orthopaedic Surgery, Aoyama General Hospital, Toyokawa, Japan
| | - Permsak Paholpak
- Department of Orthopaedics, Khon Kaen University Faculty of Medicine, Khon Kaen, 40002, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Khon Kaen University Faculty of Medicine, Khon Kaen, 40002, Thailand
| | - Winai Sirichativapee
- Department of Orthopaedics, Khon Kaen University Faculty of Medicine, Khon Kaen, 40002, Thailand
| | - Shwe Kyaw Oo
- Department of Orthopaedic Surgery, University of Medicine 1, Yangon, Myanmar
| | - Si Thu
- Department of Orthopaedic Surgery, University of Medicine 1, Yangon, Myanmar
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Kasai Y, Paholpak P, Wisanuyotin T, Sukitthanakornkul N, Hanarwut P, Chaiyamoon A, Iamsaard S, Mizuno T. Incidence and Skeletal Features of Developmental Cervical and Lumbar Spinal Stenosis. Asian Spine J 2022; 17:240-246. [PMID: 35527532 PMCID: PMC10151625 DOI: 10.31616/asj.2022.0015] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 02/22/2022] [Indexed: 11/23/2022] Open
Abstract
STUDY DESIGN Cross-sectional study. PURPOSE To report the prevalence and relationship of developmental cervical and lumbar spinal stenosis (DCSS and DLSS) with the bone parameters of the skull and extremities. OVERVIEW OF LITERATURE DCSS and DLSS are found occasionally in daily practice. DCSS and DLSS can cause compressive myelopathy, radiculopathy, and cauda equina syndrome; however, data on their prevalence and correlation with skull and skeletal extremity profiles is scarce. METHODS A cross-sectional measurement study of 293 whole-body dried-bone samples was conducted. We measured the anteroposterior (AP) and transverse diameter of the fourth to sixth cervical vertebrae (C4-C6) and third to fifth lumbar vertebrae (L3-L5). Stenosis of the cervical spine and lumbar spine was defined as an AP diameter of <12 mm and <13 mm, respectively. We also measured the skull circumference, the AP and transverse diameters of the foramen magnum, the inner and outer inter distances between the left and right orbital bones, the humerus length, and the femoral length. Kruskal-Wallis and post hoc analyses were used in the statistical analyses. RESULTS The age was 22-93 years. DCSS was found in 59 (20.1%) and DLSS in 28 (9.6%). Twelve samples had both DCSS and DLSS (development spinal stenosis, DSS). When compared to the "no spinal stenosis sample," DSS (-), DCSS and DSS had a significantly smaller skull circumference, the transverse diameter of the foramen magnum, and inner and outer distance between the orbital bone (p<0.05). There was no significant difference in humeral length, femoral length, or AP diameter of the foramen magnum. CONCLUSIONS DCSS was correlated with a small skull, a small transverse diameter of the foramen magnum, and a small orbital bone. A small skull was strongly associated with a small cervical canal. DLSS, on the other hand, was unrelated to either a small cervical canal or a small skull.
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Kasai Y, Paholpak P, Wisanuyotin T, Sirichativapee W, Oo SK, Thu S. Current status and problems of orthopaedic residents in Thailand and Myanmar. MedEdPublish 2022. [DOI: 10.12688/mep.18989.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: There is no research about current experiences of orthopaedic residents in Thailand and Myanmar. Methods: A questionnaire survey was distributed among Thai and Myanmar orthopaedic residents to assess their current experiences. This study included a total of 168 participants, comprising 92 (94.8%) of 97 orthopaedic residents in Thailand, and 76 (97.4%) of 78 in Myanmar who answered the questionnaire. The survey comprised nine questions about issues such as the contents of residency training programs, current training satisfaction, and future careers. The survey was administered anonymously between October 2020 and January 2021. Results: Regarding training content, 24 residents reported being "very satisfied", 103 were "satisfied", 37 were "moderately satisfied", and four were "dissatisfied", and respondents spent a mean of 3.1 h/day reading textbooks and research papers. As for salary, five residents answered "satisfied", 46 responded "moderately satisfied", and 117 were "dissatisfied". Conclusions: Many orthopedic residents in Thailand and Myanmar were enthusiastic about and satisfied with their training. Their only problem was that the salary was low.
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Paholpak P, Sangsin A, Sirichativapee W, Wisanuyotin T, Kosuwon W, Kasai Y, Murakami H, Tsuchiya H. Safety and Neurologic Recovery of L2 Nerve Root Sacrificed in Total En Bloc Spondylectomy Involving the L2 Vertebra. Int J Spine Surg 2022; 15:1217-1222. [PMID: 35078895 DOI: 10.14444/8154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The L2 nerve root is considered part of the lumbar plexus that innervates the iliopsoas (IP) and quadricep muscles (Qd). Total en bloc spondylectomy (TES) at the L2 vertebra requires bilateral nerve root transection to facilitate surgical dissection and vertebral body removal. Information regarding neurological function recovery of the IP and Qd in patients with muscle weakness before TES is lacking. We aimed to report the neurological recovery of IP and Qd after TES involving the L2 vertebra in preoperative lower extremity weakness in spinal tumor patients. METHODS We prospectively recorded all L2-involved spinal tumor patients undergoing TES between January 2018 and November 2020. As a primary outcome, we recorded the Manual Muscle Testing (MMT) grade of the IP and Qd preoperatively, immediately postoperatively, and at follow-up. Secondary outcomes included the Frankel neurological status, sensation impairment, and the Eastern Cooperative Oncology Group score. RESULTS From 8 TES-involving L2 patients, 6 (4 males) met the inclusion criteria. One patient had first-grade deterioration of the Qd MMT immediately postoperatively. All patients could ambulate independently 6 months after surgery. Five patients required follow-up for more than 1 year and could walk without any gait aids. All patients had persistent anterior groin and bilateral thigh numbness until the final follow-up. CONCLUSION Neurological recovery of the IP and Qd muscles as measured by MMT can occur within 6 months of bilateral L2 nerve root transection. Bilateral L2 nerve root sacrifice can have acceptable neurological outcomes and recovery, even in patients with preoperative IP and Qd weakness. LEVEL OF EVIDENCE 4.
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Affiliation(s)
- Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand .,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Apiruk Sangsin
- Department of Orthopaedics, Faculty of Medicine, Chiangmai University, Chiangmai, Thailand
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Weerachai Kosuwon
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Hideki Murakami
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Nagoya city University, Nagoya, Japan
| | - Hiroyuki Tsuchiya
- Department of Orthopaedic Surgery Graduate School of Medical Sciences, Kanazawa University, Japan
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Paholpak P, Sangsin A, Sirichativapee W, Wisanuyotin T, Kosuwon W, Sumnanoont C, Thammaroj P, Ungarreevittaya P, Kasai Y, Murakami H, Tsuchiya H. Total en bloc spondylectomy is worth doing in complete paralysis spinal giant cell tumor, a minimum 1-year follow-up. J Orthop Surg (Hong Kong) 2021; 29:23094990211005900. [PMID: 33910414 DOI: 10.1177/23094990211005900] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To investigate the neurological recovery of Frankel A spinal giant cell tumor (GCT) patients after they had received a Total En Bloc Spondylectomy (TES). MATERIALS AND METHODS We retrospectively recorded data of three patients (two females) with mobile spine GCT (T6, T10, and L2) Enneking stage III with complete paralysis before surgery, who had undergone TES in our institute from January 2018 to September 2020. The duration of neurologic recovery to Frankel E was the primary outcome. The intra-operative blood loss, operative time, operative-related complications, and the local recurrence were the secondary outcomes. RESULTS The duration of suffering from Frankel A to TES surgery was 2 months for the T6 patient, 3 weeks for the T10 patient, and 1 month for the L2 patient. Three patients had achieved full neurological recovery to Frankel E within 6 months after TES (T6 for 5 months, T10 for 3 months, and L2 for 3 months). The average blood loss was 2833.33 ml and the mean operative time was 400 min. Up until the last follow-up (13-25 months), no evidence of local recurrences had been found in any of the three patients. CONCLUSION Frankel A spinal GCT patients can achieve full neurological recovery after TES, if the procedure is performed within 3 months after complete paraplegia. TES can effectively control any local recurrences.
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Affiliation(s)
- Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology and Spinal Disorder Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Apiruk Sangsin
- Department of Orthopaedics, Faculty of Medicine, Chiangmai University, Chiangmai, Thailand
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology and Spinal Disorder Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology and Spinal Disorder Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Weerachai Kosuwon
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology and Spinal Disorder Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Chat Sumnanoont
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology and Spinal Disorder Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Puntip Thammaroj
- Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Piti Ungarreevittaya
- Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Musculoskeletal Oncology and Spinal Disorder Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Hideki Murakami
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Hiroyuki Tsuchiya
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
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Kasai Y, Mizuno T, Paholpak P, Sirichativapee W, Fukui M. The new imaging findings: "Passing spine" without kissing. Medicine (Baltimore) 2021; 100:e26191. [PMID: 34087886 PMCID: PMC8183755 DOI: 10.1097/md.0000000000026191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 05/14/2021] [Indexed: 01/04/2023] Open
Abstract
Case-control studies by examining the lumbar spine computed tomography (CT) findings focusing on the spinous processes."Passing spine" was defined as a lumbar degenerative change observed on CT images. In contrast, kissing spine, which is also an image finding, has been acknowledged as an established clinical condition. Therefore, we compared the passing spine group and the kissing spine group to investigate whether the 2 groups belong to a similar disease group; this would help explain the clinical and imaging characteristics of patients with passing spine.Previous studies have described the gradual increase in the height and thickness of the lumbar vertebral spinous processes that can occur in individuals aged >40 years, and reported that this progressive degeneration can lead to a condition termed "kissing spine."We examined the CT imaging of 373 patients with lumbar spinal disease and divided patients into 2 groups, the kissing spine (K) group and the passing spine (P) group, and compared the clinical (age, sex, presence/absence of lower extremity pain) and imaging data (localization of kissing or passing spine, intervertebral disc height at the level of kissing or passing spine, lumbar lordosis (LL) angle, presence/absence of vacuum phenomenon (VP) in the intervertebral discs and spondylolisthesis at the level of kissing or passing spine between the 2 groups.Compared with patients with kissing spine, patients with passing spine had an increased incidence of lower extremity pain, lower intervertebral disc height at the level of passing spine, relatively static LL, and VP commonly observed in the intervertebral discs at the level of passing spine.Because the clinical and imaging characteristics of patients with passing spine are different from those of patients with kissing spine, passing spine might be a pathological condition distinct from kissing spine.
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Affiliation(s)
- Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Tetsutaro Mizuno
- Department of Orthopaedic Surgery, Seirei Hamamatsu General Hospital, Hamamatsu
- Tetsutaro MIzunob : Seirei Hamamatsu General Hospital, Hamamatsu
| | - Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Mitsuru Fukui
- Laboratory of Statistics, Graduate School of Medicine, Osaka City University, Osaka, Japan
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Kasai Y, Leipe C, Saito M, Kitagawa H, Lauterbach S, Brauer A, Tarasov PE, Goslar T, Arai F, Sakuma S. Breakthrough in purification of fossil pollen for dating of sediments by a new large-particle on-chip sorter. Sci Adv 2021; 7:7/16/eabe7327. [PMID: 33853775 PMCID: PMC8046374 DOI: 10.1126/sciadv.abe7327] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 03/02/2021] [Indexed: 06/12/2023]
Abstract
Particle sorting is a fundamental method in various fields of medical and biological research. However, existing sorting applications are not capable for high-throughput sorting of large-size (>100 micrometers) particles. Here, we present a novel on-chip sorting method using traveling vortices generated by on-demand microjet flows, which locally exceed laminar flow condition, allowing for high-throughput sorting (5 kilohertz) with a record-wide sorting area of 520 micrometers. Using an activation system based on fluorescence detection, the method successfully sorted 160-micrometer microbeads and purified fossil pollen (maximum dimension around 170 micrometers) from lake sediments. Radiocarbon dates of sorting-derived fossil pollen concentrates proved accurate, demonstrating the method's ability to enhance building chronologies for paleoenvironmental records from sedimentary archives. The method is capable to cover urgent needs for high-throughput large-particle sorting in genomics, metabolomics, and regenerative medicine and opens up new opportunities for the use of pollen and other microfossils in geochronology, paleoecology, and paleoclimatology.
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Affiliation(s)
- Y Kasai
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Aichi 464-8603, Japan
| | - C Leipe
- Institute for Space-Earth Environmental Research, Nagoya University, Aichi 464-8603, Japan.
| | - M Saito
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Aichi 464-8603, Japan
| | - H Kitagawa
- Institute for Space-Earth Environmental Research, Nagoya University, Aichi 464-8603, Japan
| | - S Lauterbach
- Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Kiel University, Max-Eyth-Str. 11-13, 24118 Kiel, Germany
- Institute of Geosciences, Kiel University, Ludewig-Meyn-Str. 10, 24118 Kiel, Germany
| | - A Brauer
- GFZ German Research Centre for Geosciences, Section 4.3-Climate Dynamics and Landscape Evolution, Telegrafenberg, 14473 Potsdam, Germany
- Institute of Geosciences, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - P E Tarasov
- Institute of Geological Sciences, Section Paleontology, Freie Universität Berlin, Malteserstr. 74-100, Building D, 12249 Berlin, Germany
| | - T Goslar
- Poznan Radiocarbon Laboratory, Foundation of the Adam Mickiewicz University, Rubiez 46, Poznan, Poland
- Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznańskiego 2, Poznan, Poland
| | - F Arai
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Aichi 464-8603, Japan
- Department of Mechanical Engineering, The University of Tokyo, Bunkyo-ku 113-8656, Japan
| | - S Sakuma
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Aichi 464-8603, Japan.
- Department of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, Japan
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Paholpak P, Sirichativapee W, Wisanuyotin T, Kosuwon W, Kasai Y, Murakami H. The most appropriate titanium mesh cage size for anterior spinal reconstruction after single-level lumbar total en bloc spondylectomy: a finite element analysis and cadaveric validation study. J Orthop Surg Res 2021; 16:178. [PMID: 33750424 PMCID: PMC7941739 DOI: 10.1186/s13018-021-02326-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 02/24/2021] [Indexed: 11/20/2022] Open
Abstract
Purpose There is little information available regarding the cage diameter that can provide the most rigid construct reconstruction after total en bloc spondylectomy (TES). The aim of this study was thus to determine the most appropriate titanium mesh cage diameter for reconstruction after spondylectomy. Methods A finite element model of the single level lumbar TES was created. Six models of titanium mesh cage with diameters of 1/3, 1/2, 2/3, 3/4, 4/5 of the caudad adjacent vertebra, and 1/1 of the cephalad vertebra were tested for construct stiffness. The peak von Mises stress (MPa) at the failure point and the site of failure were measured as outcomes. A cadaveric validation study also conducted to validate the finite element model. Results For axial loading, the maximum stress points were at the titanium mesh cage, with maximum stress of 44,598 MPa, 23,505 MPa, 23,778 MPa, and 16,598 MPa, 10,172 MPa, 10,805 MPa in the 1/3, 1/2, 2/3, 3/4, 4/5, and 1/1 diameter model, respectively. For torsional load, the maximum stress point in each of the cages was identified at the rod area of the spondylectomy site, with maximum stress of 390.9 MPa (failed at 4459 cycles), 141.35 MPa, 70.098 MPa, and 88.972 MPa, 42.249 MPa, 15.827 MPa, respectively. A cadaveric validation study results were coincided with the finite element model results. Conclusion The most appropriate mesh cage diameter for reconstruction is 1/1 the diameter of the lower endplate of the adjacent cephalad vertebra, due to its ability to withstand both axial and torsional stress. According to the difficulty of large size cage insertion, a cage diameter of more than half of the upper endplate of the caudad vertebrae is acceptable in term of withstand stress. A cage diameter of 1/3 is unacceptable for reconstruction after total en bloc spondylectomy.
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Affiliation(s)
- Permsak Paholpak
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand. .,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand.
| | - Winai Sirichativapee
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Weerachai Kosuwon
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Yuichi Kasai
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Musculoskeletal Oncology Research Group, Khon Kaen University, Khon Kaen, Thailand
| | - Hideki Murakami
- Department of Orthopedic Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
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Wisanuyotin T, Sirichativapee W, Paholpak P, Kosuwon W, Kasai Y. Optimal configuration of a dual locking plate for femoral allograft or recycled autograft bone fixation: A finite element and biomechanical analysis. Clin Biomech (Bristol, Avon) 2020; 80:105156. [PMID: 32862075 DOI: 10.1016/j.clinbiomech.2020.105156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 07/23/2020] [Accepted: 08/19/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Allografts and recycled bone autograft are commonly used for biological reconstruction. The dual locking plates fixation method has been advocated for increasing allograft stability and preventing fixation failure; however, the biomechanical properties of the various configurations of dual locking plates have not been extensively studied. METHODS In a finite element (FE) analysis, we developed 6 patterns of different dual locking plate configurations for fixation of the mid shaft of the femur. The maximum strains were recorded for each of the 6 models then axial, bending and torsion stiffness were calculated. The FE analysis was validated the results with mechanical testing (axial compression, bending, and torsional stiffness) on a cadaveric femur. FINDINGS The highest axial compression (715.41 N/mm) and lateral bending (2981.24 N/mm) was found in Model 4 (with two 10-hole locking plates placed at the medial and lateral side), while the highest torsional stiffness (193.59 N·mm /mm) was found in Model 3 (with 8- and 10-hole locking plates placed at the posterior and lateral side). Excellent agreement was found between the finite element analysis and biomechanical testing (r2 = 0.98). INTERPRETATION The dual locking plate configuration with medial and lateral, 10-hole locking plates provided the most rigid and strongest fixation of the femur; both in terms of axial compression and lateral bending stiffness.
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Affiliation(s)
- Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, 40002, Thailand.
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, 40002, Thailand
| | - Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, 40002, Thailand
| | - Weerachai Kosuwon
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, 40002, Thailand
| | - Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, 40002, Thailand
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Kasai Y, Paholpak P, Nabudda K, Wisanuyotin T, Sirichativapee W, Kosuwon W, Mizuno T, Kato T. Pedicle Screw System May Not Control Severe Spinal Rotational Instability. Spine (Phila Pa 1976) 2020; 45:E1386-E1390. [PMID: 32796462 DOI: 10.1097/brs.0000000000003619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN An in vitro biomechanical study. OBJECTIVE The purpose of this study is to discuss whether pedicle screw systems can control spinal rotational instability in a functional spinal unit of lumbar spine on human cadaver. SUMMARY OF BACKGROUND DATA Rotational experiments using deer lumbar cadaveric models showed that rotational range of motion (ROM) of the model fixed by a pedicle screw system with crosslinking after total facetectomy for both the sides was larger than that in the intact model, and stated that spinal rotational instability could not be controlled using a pedicle screw system. METHODS A rotation experiment using 10 functional spinal units (L3-4) of lumbar spine on human cadavers was performed by preparing the four models (intact model, damaged model, pedicle screw model, and crosslink (CL) model) in stages, then calculating and comparing rotational ROM among the four models. RESULTS Rotational ROM in the CL model was still larger than that of the intact model in all the samples. And, rotational ROM decreased in the order of damaged model >> pedicle screw model > CL model > intact model. Statistical analysis revealed significant differences between all models (P < 0.001). CONCLUSIONS Pedicle screw systems may not control severe spinal rotational instability in human lumbar cadaveric models with total facetectomy on both the sides. This may represent a major biomechanical drawback to the pedicle screw system. LEVEL OF EVIDENCE N/A.
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Affiliation(s)
- Yuichi Kasai
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Permsak Paholpak
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Kriengkrai Nabudda
- Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Winai Sirichativapee
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Weerachai Kosuwon
- Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Tetsutaro Mizuno
- Department of Orthopaedic Surgery, Seirei Hamamatsu General Hospital, Shizuoka, Japan
| | - Takaya Kato
- Graduate School of Regional Innovation Studies, Mie University, Mie, Japan
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Wada E, Fukui M, Takahashi K, Takeuchi D, Hashizume H, Kanamori M, Hosono N, Kanchiku T, Kasai Y, Sekiguchi M, Konno SI, Kawakami M, Yonenobu K. Japanese orthopaedic association cervical myelopathy evaluation questionnaire (JOACMEQ): Part 5. Determination of responsiveness. J Orthop Sci 2019; 24:57-61. [PMID: 30279132 DOI: 10.1016/j.jos.2018.08.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 08/21/2018] [Accepted: 08/22/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND In 1999, the Japanese Orthopaedic Association decided to develop a new Cervical Myelopathy Evaluation Questionnaire (JOACMEQ). The final version of the JOACMEQ, comprising 24 questions and five domains (cervical spine function (CF); upper extremity function (UF); lower extremity function (LF); bladder function (BF); and quality of life (QOL)), was established after three nationwide investigations. The fourth investigation, reported in this paper, was performed to confirm the responsiveness of the questionnaire. METHODS A total of 137 patients with cervical myelopathy were included in the study. Each patient was interviewed twice using the JOACMEQ before and after treatment. At the second interview, the patients self-rated their condition in five domains for "worse," "somewhat worse," "no change," "somewhat better," or "better," and these scores were defined as the external assessment rating. The difference of the points in five domains between the first and the second interview was calculated against each external assessment. Based on the results, substantial clinical benefit (SCB) thresholds for the JOACMEQ were determined. RESULTS The statistically significant median values of the acquired points were 17.5 for CF, 16.0 and 21.0 for UF, 27.0 and 20.5 for LF, 13.0 for BF, and 29.0 for QOL. After consideration of the results, the committee decided that an acquired point ≥20 could be interpreted as representing an SCB threshold for the JOACMEQ. CONCLUSION We have concluded that a treatment can be judged to be effective for a patient if 1) The patient give all answers for the questions necessary to calculate the functional score of a domain and an increase of ≥20 points is obtained for that score, or 2) The functional score after treatment is > 90 points even if the answer for the unanswered questions was supposed to be the worst possible choice.
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Affiliation(s)
- Eiji Wada
- Spine and Spinal Cord Center, Osaka Police Hospital, Osaka, Japan.
| | - Mitsuru Fukui
- Laboratory of Statistics, Osaka City University Faculty of Medicine, Osaka, Japan
| | - Kazuhisa Takahashi
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Daisaku Takeuchi
- Department of Orthopedic Surgery, Dokkyo Medical University School of Medicine, Shimotsuga-gun, Tochigi Prefecture, Japan
| | - Hiroshi Hashizume
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | | | - Noboru Hosono
- Department of Orthopedic Surgery, Japan Community Health Care Organization Hoshigaoka Medical Center, Hirakata, Japan
| | - Tsukasa Kanchiku
- Department of Orthopedic Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Japan
| | - Miho Sekiguchi
- Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Shin-Ichi Konno
- Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Mamoru Kawakami
- Spine Care Center, Wakayama Medical University Kihoku Hospital, Wakayama, Japan
| | - Kazuo Yonenobu
- Graduate School of Health Care Sciences, Jikei Institute, Osaka, Japan
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Kawamoto R, Ninomiya D, Kasai Y, Senzaki K, Kusunoki T, Ohtsuka N, Kumagi T. Baseline and changes in serum uric acid independently predict 11-year incidence of metabolic syndrome among community-dwelling women. J Endocrinol Invest 2018; 41:959-968. [PMID: 29460261 DOI: 10.1007/s40618-017-0822-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 12/27/2017] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Metabolic syndrome (MetS) is associated with an increased risk of major cardiovascular events. In women, increased serum uric acid (SUA) levels are associated with MetS and its components. However, whether baseline and changes in SUA predict incidence of MetS and its components remains unclear. METHODS The subjects comprised 407 women aged 71 ± 8 years from a rural village. We have identified participants who underwent a similar examination 11 years ago, and examined the relationship between baseline and changes in SUA, and MetS based on the modified criteria of the National Cholesterol Education Program's Adult Treatment Panel (NCEP-ATP) III report. RESULTS Of these subjects, 83 (20.4%) women at baseline and 190 (46.7%) women at follow-up had MetS. Multiple linear regression analysis was performed to evaluate the contribution of each confounding factor for MetS; both baseline and changes in SUA as well as history of cardiovascular disease, low-density lipoprotein cholesterol, and estimated glomerular filtration ratio (eGFR) were independently and significantly associated with the number of MetS components during an 11-year follow-up. The adjusted odds ratios (ORs) (95% confidence interval) for incident MetS across tertiles of baseline SUA and changes in SUA were 1.00, 1.47 (0.82-2.65), and 3.11 (1.66-5.83), and 1.00, 1.88 (1.03-3.40), and 2.49 (1.38-4.47), respectively. In addition, the combined effect between increased baseline and changes in SUA was also a significant and independent determinant for the accumulation of MetS components (F = 20.29, p < 0.001). The ORs for incident MetS were significant only in subjects with age ≥ 55 years, decline in eGFR, and no baseline MetS. CONCLUSIONS These results suggested that combined assessment of baseline and changes in SUA levels provides increased information for incident MetS, independent of other confounding factors in community-dwelling women.
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Affiliation(s)
- R Kawamoto
- Department of Community Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon-city, Ehime, 791-0295, Japan.
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan.
| | - D Ninomiya
- Department of Community Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon-city, Ehime, 791-0295, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - Y Kasai
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - K Senzaki
- Department of Community Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon-city, Ehime, 791-0295, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - T Kusunoki
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - N Ohtsuka
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - T Kumagi
- Department of Community Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon-city, Ehime, 791-0295, Japan
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Kawamoto R, Ninomiya D, Kasai Y, Senzaki K, Kusunoki T, Ohtsuka N, Kumagi T. Interaction between gender and uric acid on hemoglobin A1c in community-dwelling persons. J Endocrinol Invest 2018; 41:421-429. [PMID: 28948573 DOI: 10.1007/s40618-017-0760-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 08/28/2017] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Higher glycated hemoglobin (Hb) (HbA1c) is significantly associated with an increased risk of cardiovascular disease (CVD). Serum uric acid (SUA) levels are associated with glucose intolerance and type 2 diabetes. Whether gender-specific differences regarding the relationship between SUA levels and HbA1c exist is unknown. AIM We recruited 1636 (men, 696 aged of 70 ± 10 years; women, 940 aged of 70 ± 9 years) participants and enrolled in the study during their annual health examination from a single community. We investigated the association between SUA levels and HbA1c within each gender. RESULTS Multiple linear regression analysis showed that in men, SUA (β = -0.091, p = 0.014) with prevalence of antidiabetic medication (β = 0.428, p < 0.001) and eGFR (β = 0.112, p = 0.016) were significantly and negatively associated with HbA1c, and in women, SUA (β = 0.101, p = 0.002) with prevalence of antidiabetic medication (β = 0.458, p < 0.001) were significantly and positively associated with HbA1c. Moreover, the interaction between gender and SUA (β = 0.445, p < 0.001) as well as gender (β = -0.465, p < 0.001), prevalence of antidiabetic medication (β = 0.444, p < 0.001), eGFRCKDEPI (β = 0.074, p = 0.014), and SUA (β = -0.356, p < 0.001) was a significant and independent determinant of HbA1c. A significant interactive effect of gender and SUA on determinants of HbA1c was noted in patients not on antidiabetic medications, regardless of age, HbA1c, and renal function. CONCLUSIONS The interaction between gender and SUA was associated with HbA1c independent of other metabolic factors in community-dwelling persons.
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Affiliation(s)
- R Kawamoto
- Department of Community Medicine, Ehime University Graduate School of Medicine, Tōon, Ehime, 791-0295, Japan.
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan.
| | - D Ninomiya
- Department of Community Medicine, Ehime University Graduate School of Medicine, Tōon, Ehime, 791-0295, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan
| | - Y Kasai
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan
| | - K Senzaki
- Department of Community Medicine, Ehime University Graduate School of Medicine, Tōon, Ehime, 791-0295, Japan
| | - T Kusunoki
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan
| | - N Ohtsuka
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan
| | - T Kumagi
- Department of Community Medicine, Ehime University Graduate School of Medicine, Tōon, Ehime, 791-0295, Japan
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Mizuno T, Sakakibara T, Yoshikawa T, Inaba T, Kato T, Kasai Y. Biomechanical Problems Related to the Pedicle Screw System. Turk Neurosurg 2018; 29:53-58. [PMID: 29484625 DOI: 10.5137/1019-5149.jtn.21002-17.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AIM To assess biomechanical problems related to pedicle screw (PS) systems. MATERIAL AND METHODS Functional spinal units (L3-4) of deer were evaluated using a 6-axis material testing machine. For the specimen models, we prepared an intact model, a damaged model, a PS model, and a crosslink model. We checked the range of motion (ROM) during bending and rotation tests. Eight directions were measured in the bending test: anterior, right-anterior, right, right-posterior, posterior, left-posterior, left, and left-anterior, and 2 directions were measured in the rotation test (right and left). RESULTS ROMs of the PS model were smaller than those of the intact model in all directions. However, ROMs of the PS model in the rotation test were smaller than those of the damaged model and larger than those of the intact model. The stability of the crosslink model was better than that of the PS model during the bending test, but ROMs of the crosslink model were larger than those of the intact model during the rotation test. CONCLUSION Excessive bending rigidity and rotational instability are the biomechanical problems related to PS systems. Based on these results, we speculate that one of the most significant causes of adjacent segment disease is excessive bending rigidity and one of the most important causes of instrumentation failure is rotational instability.
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Affiliation(s)
- Tetsutaro Mizuno
- Mie University Graduate School of Medicine, Department of Spinal Surgery and Medical Engineering, Japan
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Kasai Y, Mizuno T, Sakakibara T, Thu S, Kyaw TA, Htun KA. A survey of workplace violence against physicians in the hospitals, Myanmar. BMC Res Notes 2018; 11:133. [PMID: 29448952 PMCID: PMC5815188 DOI: 10.1186/s13104-018-3240-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/09/2018] [Indexed: 11/12/2022] Open
Abstract
Objective Workplace violence in hospitals is recently becoming a major global concern in many countries. However, in Myanmar, we have felt that patients and their families have rarely made unreasonable complaints in hospitals, and then, the purpose of this study is to report the current state of workplace violence in hospitals in Myanmar. Participants are 196 physicians (108 males and 88 females) in hospitals in Myanmar. Results A descriptive survey was conducted in regard to verbal abuse and physical violence from patients or the people concerned. At the results of this study, the percentages of physicians who have encountered verbal abuse and those who have encountered physical violence are markedly low (8.7 and 1.0%, respectively). The present study is the first to report the frequencies of verbal abuse and physical violence against physicians in a least developed country, and the results of the present study are important in terms of discussing workplace violence in hospitals.
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Affiliation(s)
- Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan.
| | - Tetsutaro Mizuno
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Si Thu
- Department of Orthopaedic Surgery, University of Medicine, Mandalay, 30th Street, Between 73rd & 74th Streets, Mandalay, Myanmar
| | - Thein Aung Kyaw
- Department of Orthopaedic Surgery, University of Medicine, Yangon-1, No. 245, Myoma Kyaung Street, Lanmadaw Township, Yangon, Myanmar
| | - Kyaw Aung Htun
- Department of Orthopaedic Surgery, (1000) bedded Nay Pyi Taw General Hospital, Nay Pyi Taw, Myanmar
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Mizuno T, Sakakibara T, Yoshikawa T, Inaba T, Kato T, Kasai Y. Biomechanical Stability of a Cross-Rod Connection with a Pedicle Screw System. Med Sci Monit Basic Res 2018; 24:26-30. [PMID: 29371585 PMCID: PMC5795918 DOI: 10.12659/msmbr.906339] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Background Surgery with pedicle screw instrumentation does not provide sufficient torsional stability. This leads to pseudoarthrosis, loosening of the pedicle screws, and, ultimately, implant failure. Material/Methods Functional spinal units from 18 deer were evaluated using a 6-axis material testing machine. As specimen models, we prepared an intact model, a damaged model, a cross-rod model, and a cross-link model. We measured the range of motion (ROM) during bending and rotation tests. Results The range of motions of cross-rod model were almost equal to those of cross-link model during the bending test. In the rotation test, the average ranges of motion of the intact, cross-rod, and cross-link models were 2.9°, 3.1°, and 3.9° during right rotation and 2.9°, 3.1°, and 4.1° during left rotation, respectively. The range of motions of the cross-rod model were significantly smaller than those of the cross-link model during the rotation test. The range of motions of the intact model were significantly smaller than those of the cross-link model during the rotation test, but there were no statistically significant differences between the range of motions of intact model and cross-rod model during the rotation test. Conclusions The stability of spinal fixation such as cross-rod model is equal to the fixation using the pedicle screw system during bending tests and equal to that of the intact spine during rotation tests.
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Affiliation(s)
- Tetsutaro Mizuno
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Takamasa Yoshikawa
- Department of Mechanical Engineering, Graduate School of Engineering, Mie University, Tsu, Mie, Japan
| | - Tadashi Inaba
- Department of Mechanical Engineering, Graduate School of Engineering, Mie University, Tsu, Mie, Japan
| | - Takaya Kato
- Community-University Research Cooperation Center, Mie University, Tsu, Mie, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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Mizuno T, Sakakibara T, Kasai Y. RETRACTED: Three-Minutes Sitting Test for evaluating lumbar foraminal stenosis: A preliminary report. J Spinal Cord Med 2018:1-4. [PMID: 29323629 DOI: 10.1080/10790268.2017.1420537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
This article has been retracted.
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Affiliation(s)
- Tetsutaro Mizuno
- a Department of Spinal Surgery and Medical Engineering , Mie University Graduate School of Medicine , Tsu City , Japan
| | - Toshihiko Sakakibara
- a Department of Spinal Surgery and Medical Engineering , Mie University Graduate School of Medicine , Tsu City , Japan
| | - Yuichi Kasai
- a Department of Spinal Surgery and Medical Engineering , Mie University Graduate School of Medicine , Tsu City , Japan
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Inoue M, Mizuno T, Sakakibara T, Kato T, Yoshikawa T, Inaba T, Kasai Y. Trajectory of instantaneous axis of rotation in fixed lumbar spine with instrumentation. J Orthop Surg Res 2017; 12:177. [PMID: 29145877 PMCID: PMC5689179 DOI: 10.1186/s13018-017-0677-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 11/05/2017] [Indexed: 11/10/2022] Open
Abstract
Background Several studies showed instantaneous axis of rotation (IAR) in the intact spine. However, there has been no report on the trajectory of the IAR of a damaged spine or that of a fixed spine with instrumentation. It is the aim of this study to investigate the trajectory of the IAR of the lumbar spine using the vertebra of deer. Methods Functional spinal units (L5–6) from five deer were evaluated with six-axis material testing machine. As specimen models, we prepared a normal model, a damaged model, and a pedicle screw (PS) model. We measured the IAR during bending in the coronal and sagittal planes and axial rotation. In the bending test, four directions were measured: anterior, posterior, right, and left. In the rotation test, two directions were measured: right and left. Results The IAR of the normal model during bending moved in the bending direction. The IAR of the damaged model during bending moved in the bending direction, but the magnitude of displacement was bigger compared to that of the normal model. In the PS model, the IAR during bending test hardly moved. During rotation test, the IAR of the normal model and PS model located in the spinal canal, but the IAR of the damaged model located in the posterior part of the vertebral body. Conclusions In this study, the IAR of damaged model was scattering and that of PS model was concentrating. This suggests that higher mechanical load applied to the dura tube and nerve roots in the damaged model and less mechanical load applied to that in the PS model.
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Affiliation(s)
- Masataka Inoue
- Department of Mechanical Engineering, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu City, 514-8507, Mie prefecture, Japan
| | - Tetsutaro Mizuno
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, 514-8507, Mie prefecture, Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, 514-8507, Mie prefecture, Japan
| | - Takaya Kato
- Community-University Research Cooperation Center, Mie University, 1577 Kurimamachiya-cho, Tsu City, 514-8507, Mie prefecture, Japan
| | - Takamasa Yoshikawa
- Department of Mechanical Engineering, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu City, 514-8507, Mie prefecture, Japan
| | - Tadashi Inaba
- Department of Mechanical Engineering, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu City, 514-8507, Mie prefecture, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, 514-8507, Mie prefecture, Japan.
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Guo R, Kurata T, Kondo T, Imanishi T, Mizuno T, Sakakibara T, Kasai Y. Tumoral calcinosis in the cervical spine: a case report and review of the literature. J Med Case Rep 2017; 11:304. [PMID: 29073937 PMCID: PMC5658931 DOI: 10.1186/s13256-017-1474-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 09/21/2017] [Indexed: 12/03/2022] Open
Abstract
Background Tumoral calcinosis is rarely located in spine. A 55-year-old Japanese woman with cervical tumoral calcinosis is presented, along with a review of the literature relating to tumoral calcinosis in the spine. We discussed the etiology, diagnosis, and management of this condition. Case presentation We report a case of a patient with cervical tumoral calcinosis with end-stage renal disease. A computed tomography scan showed a lobulated, calcified mass around the right facet joint at the fourth-fifth cervical spine and calcifications were also observed in the right intervertebral foramens at fourth-fifth cervical spine and fifth-sixth cervical spine levels and the anterior wall of the spinal canal. By performing a cervical decompression and stabilization, the patient recovered from her neurological symptoms. Conclusions Although tumoral calcinosis is rarely located in the spine, it should be considered in the differential diagnosis of spinal lesions. If a calcified mass causes acute neurological symptoms, resection of the mass is still the most important treatment.
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Affiliation(s)
- Rui Guo
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan.,Department of Orthopaedics, The Third People's Hospital of Kunshan, Kunshan, Jiangsu, China
| | - Tatsuya Kurata
- Department of Orthopaedic Surgery, Sakakibara Onsen Hospital, Tsu City, Mie, Japan
| | - Tetsushi Kondo
- Department of Orthopaedic Surgery, Murase Hospital, Suzuka City, Mie, Japan
| | - Takao Imanishi
- Department of Orthopaedic Surgery, Murase Hospital, Suzuka City, Mie, Japan
| | - Tetsutaro Mizuno
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan.
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Daté Y, Saito M, Kasai Y, Ogura N, Maruyama A, Gotoh J, Maruyama M. Clinical significance of delayed recall in the cognitive screening for the hospitalized aged patients; Long way to searching for a patient- and examiner-friendly screening. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
BACKGROUND It is reported that persons with high Lie score (L score) of a personality test are aggressively self-confident and are also related to depression or schizophrenia In this study, we examined the characteristics of patients with high L scores on the Maudsley Personality Inventory (MPI) and examined the significance of the L score. MATERIALS AND METHODS We collected the data of 10789 subjects and examined the relationship between L score or the number of characteristic biased persons and the parameters of age, sex, education level, occupation, and degree of pain. Furthermore, we examined the changes in extraversion-introversion (E score), neuroticism (N score), and L scores at approximately 1 year after surgery in 1711 patients who underwent surgery at our university hospital or affiliated hospitals. RESULTS L score was significantly higher among persons with a high degree of pain, and ratio of the characteristic biased persons in L score was significantly high among persons in their 40s to 60s, healthcare professionals and those with a high degree of pain. Moreover, L score scarcely changed between before and after surgery when compared with E score and N score. CONCLUSION L score is not greatly influenced by an individual's state of mind or situation at different times, and may indicate the personality traits proper to the person. It is shown that L score may indicate the personality trait characteristics of persons who want to make themselves look good in the eyes of other.
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Affiliation(s)
- Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Edobashi, Tsu, Mie, Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Edobashi, Tsu, Mie, Japan
| | - Tetsutaro Mizuno
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Edobashi, Tsu, Mie, Japan
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Kasai Y, Fukui M, Takahashi K, Ohtori S, Takeuchi D, Hashizume H, Kanamori M, Hosono N, Kanchiku T, Wada E, Sekiguchi M, Konno S, Kawakami M. Verification of the sensitivity of functional scores for treatment results - Substantial clinical benefit thresholds for the Japanese Orthopaedic Association Back Pain Evaluation Questionnaire (JOABPEQ). J Orthop Sci 2017; 22:665-669. [PMID: 28365168 DOI: 10.1016/j.jos.2017.02.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 02/13/2017] [Accepted: 03/14/2017] [Indexed: 01/08/2023]
Abstract
BACKGROUND Validity and reliability of the Japanese Orthopaedic Association Back Pain Evaluation Questionnaire (JOABPEQ) had already been verified as the patients' self-rating assessment of low back pain and lumbar spinal disease and, the present study demonstrated the responsiveness of this measure. METHODS 192 subjects who were determined by medical instructors of the Japanese Society for Spine Surgery and Related Research were analyzed. They had completed a series of treatment and both surveys before and after the treatment. Authors investigated rates of concordance between assessment by physicians and subjective assessment by patients. The mean, standard deviation, minimum, 25th percentile, median, 75th percentile and maximum values for pre-treatment, post-treatment, and acquired points were calculated, and then, we also investigated the trend between subjective assessment by patients and mean acquired points for each JOABPEQ domain and substantial clinical benefit thresholds for the JOABPEQ. RESULTS Symptom changes as assessed by physicians did not coincide with those by patients, and acquired points in each JOABPEQ domain were significantly increased with improved self-rating by patients. In addition, patients who rated symptom changes as "slightly improved" showed a mean acquired points of ≥20, and those reporting "improved" showed a 25th percentile points of the acquired points of ≥20 approximately. CONCLUSION A significant correlation was noted between the self-rating of patients and acquired points JOABPEQ, suggesting that ≥20 acquired points can be interpreted as substantial clinical benefit thresholds for the JOABPEQ.
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Affiliation(s)
- Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Japan.
| | - Mitsuru Fukui
- Laboratory of Statistics, Osaka City University Faculty of Medicine, Osaka, Japan
| | - Kazuhisa Takahashi
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Seiji Ohtori
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Daisaku Takeuchi
- Department of Orthopedic Surgery, Dokkyo Medical University School of Medicine, Shimotsuga-gun, Tochigi Prefecture, Japan
| | - Hiroshi Hashizume
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | | | - Noboru Hosono
- Department of Orthopedic Surgery, Japan Community Health Care Organization Osaka Hospital, Osaka, Japan
| | - Tsukasa Kanchiku
- Department of Orthopedic Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Eiji Wada
- Spine and Spinal Cord Center, Osaka Police Hospital, Osaka, Japan
| | - Miho Sekiguchi
- Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Shinichi Konno
- Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Mamoru Kawakami
- Department of Orthopaedic Surgery, Wakayama Medical University Kihoku Hospital, Ito gun, Wakayama Prefecture, Japan
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Hakozaki T, Ichinohe T, Kanno N, Yogo T, Harada Y, Inaba T, Kasai Y, Hara Y. Biomechanical assessment of the effects of vertebral distraction-fusion techniques on the adjacent segment of canine cervical vertebrae. Am J Vet Res 2017; 77:1194-1199. [PMID: 27805449 DOI: 10.2460/ajvr.77.11.1194] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To assess effects of vertebral distraction-fusion techniques at a treated segment (C5-C6) and an adjacent segment (C4-C5) of canine cervical vertebrae. SAMPLE Cervical vertebrae harvested from cadavers of 10 skeletally mature Beagles. PROCEDURES Three models (intact, titanium plate, and polymethylmethacrylate [PM MA]) for stabilization of the caudal region of the cervical vertebrae (C4 through C7) were applied to the C5-C6 vertebral segment sequentially on the same specimens. Biomechanical assessments with flexion-extension, lateral bending, and axial rotational tests were conducted after each procedure. Range of motion (ROM) for a torque load applied with a 6-axis material tester was measured at C4-5 and C5-6 and calculated by use of a 3-D video measurement system. RESULTS In both the plate and PMMA models, ROM significantly increased at C4-5 and significantly decreased at C5-6, compared with results for the intact model. The ROM at C5-6 was significantly lower for the plate model versus the PMMA model in lateral bending and for the PMMA model versus the plate model in axial rotation. Conversely, ROM at C4-5 was significantly higher in axial rotation for the PMMA model versus the plate model. No significant differences were identified in flexion-extension between the PMMA and plate models at either site. CONCLUSIONS AND CLINICAL RELEVANCE Results of this study suggested that vertebral distraction and fusion of canine vertebrae can change the mechanical environment at, and may cause disorders in, the adjacent segment. Additionally, findings suggested that effects on the adjacent segment differed on the basis of the fusion method used.
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Poosiripinyo T, Paholpak P, Jirarattanaphochai K, Kosuwon W, Sirichativapee W, Wisanuyotin T, Laupattarakasem P, Sukhonthamarn K, Jeeravipoolvarn P, Sakakibara T, Kasai Y. The Japanese Orthopedic Association Back Pain Evaluation Questionnaire (JOABPEQ): A validation of the reliability of the Thai version. J Orthop Sci 2017; 22:34-37. [PMID: 27793440 DOI: 10.1016/j.jos.2016.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 09/06/2016] [Accepted: 10/04/2016] [Indexed: 02/09/2023]
Abstract
BACKGROUND The Japanese Orthopedic Association Back Pain Evaluation Questionnaire (JOABPEQ) was developed by the Japanese Orthopedic Association (JOA) for assessment of lower back pain and lumbar spinal disease. We aimed to translate the JOABPEQ into Thai and test its reliability and validity in the Thai context. METHODS The original JOABPEQ was translated into Thai in accordance with international recommendations. Then 180 lumbar spinal disease patients (mean age 58.58 ± 11.97, 68.3% female) were asked to complete the Thai version of the JOABPEQ twice at 2-week intervals. Test-retest reliability was analyzed using the intra-class correlation coefficient (ICC). Internal consistencies were analyzed using Cronbach's alpha, while the construct validity was compared with the Thai version of the modified SF-36, and tested using the Spearman's rank correlation coefficient. RESULTS The Thai JOABPEQ showed satisfactory test-retest reliability in all parameters (Intra-class Correlation Coefficient 0.761-0.862). The variables low back pain, walking ability, social life function, and mental health had satisfactory internal consistency (the respective Cronbach's α was 0.798, 0.721, 0.707, and 0.795). Only the lumbar function parameter showed moderate reliability (Cronbach's α = 0.654). All of the variables in the Thai JOABPEQ had a statistically positive correlation with the correspondent Thai SF-36 subscales (Spearman's rank correlation p value < 0.05). CONCLUSION The Thai version of JOABPEQ had satisfactory internal consistency, test-retest reliability, and construct validity; it can be used as a reliable tool for assessing quality of life for lumbar spinal disease patients in Thailand.
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Affiliation(s)
- Thanate Poosiripinyo
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Permsak Paholpak
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.
| | - Kitti Jirarattanaphochai
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Weerachai Kosuwon
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Winai Sirichativapee
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Pat Laupattarakasem
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Kamolsak Sukhonthamarn
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Polasak Jeeravipoolvarn
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Biomedical Engineering, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Biomedical Engineering, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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Guo R, Sakakibara T, Mizuno T, Akeda K, Kondo T, Kasai Y. Relief of Lower Back and Leg Pain after Myelography. Open Orthop J 2016; 10:539-542. [PMID: 27990191 PMCID: PMC5120379 DOI: 10.2174/1874325001610010539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 10/21/2016] [Accepted: 10/28/2016] [Indexed: 12/05/2022] Open
Abstract
Introduction: It is well-known that many patients will have adverse reactions such as headache and nausea after undergoing myelography, but we have often seen cases where symptoms such as lower back pain and leg pain were alleviated following myelography. To the best of our knowledge, such clinical cases of post-myelographic alleviation have not been reported. Materials and Methods: A total of 325 patients with a degenerative lumbar spinal disorder who underwent myelography were prospectively investigated at four hospitals from April 2012 to March 2014 to survey the post-myelographic alleviation of lower back and leg pain prospectively. The severities of lower back pain, leg pain and numbness of the lower extremities were evaluated and intermittent claudication distance was measured before myelography. The magnetic resonance imaging (MRI) findings and myelographic findings were also evaluated for the patients that their symptoms were improved. Results: Thirty-five of 325 cases (10.8%) of these patients had their symptoms alleviated after undergoing myelography; 26 cases of lower back pain, two cases of leg pain, two cases of numbness of the lower extremity, and five cases of intermittent claudication. Conclusion: In the patients of a degenerative lumbar spinal disorder, about 10% cases with lower back pain or intermittent claudication had post-myelographic alleviation. Intradural injection therapy might be a therapeutic method to alleviate these symptoms.
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Affiliation(s)
- Rui Guo
- School of Medicine, Jiangsu University, Zhenjiang, China; Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
| | - Tetsutaro Mizuno
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
| | - Koji Akeda
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
| | - Tetsushi Kondo
- Department of Orthopaedc Surgery, Murase Hospital, Mie, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
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Nagaya M, Matsunari H, Kanai T, Maehara M, Nakano K, Umeki I, Katsumata Y, Kasai Y, Sakai R, Kobayashi M, Honda M, Abe N, Watanabe M, Umeyama K, Nagashima H. An Effective New Cryopreservation Procedure for Pancreatic Islets Using Hollow Fiber Vitrification. Horm Metab Res 2016; 48:540-9. [PMID: 27341475 DOI: 10.1055/s-0042-102628] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The present study aimed at establishing a new cryopreservation method for mouse pancreatic islets by vitrification using hollow fibers as a container. A unique feature of the hollow fiber vitrification (HFV) method is that this method achieves stable vitrification using a minimum volume of cryoprotectant (CPA) solution, thereby ensuring high viability of the islets. The cytotoxicity, optimum composition, and concentration of the CPAs for vitrifying islets were examined. The viability, functional-integrity of vitrified islets were evaluated in comparison with those vitrified by conventional methods. Insulin secretion was measured in vitro by a static incubation assay and the metabolic functions was tested after transplantation into Streptozotocin-induced diabetic mice. The combination of 15% dimethyl sulfoxide+15% ethylene glycol resulted in the best CPA solution for the HFV of islets. HFV showed the highest viability in comparison to 2 vitrification methods, open pulled straws and vitrification with EDT324 solution. The vitrified islets stably expressed β-cells markers NeuroD, Pancreatic and duodenal homeobox-1, and MafA. Transplantation of the vitrified islets achieved euglycemia of the host diabetic mice and response to an intraperitoneal glucose tolerance test to a similar extent as non-vitrified transplanted islets. The HFV method allows for efficient long-term cryopreservation of islets.
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Affiliation(s)
- M Nagaya
- Meiji University International Institute for Bio-Resource Research, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - H Matsunari
- Meiji University International Institute for Bio-Resource Research, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - T Kanai
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - M Maehara
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - K Nakano
- Meiji University International Institute for Bio-Resource Research, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - I Umeki
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - Y Katsumata
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - Y Kasai
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - R Sakai
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - M Kobayashi
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - M Honda
- Meiji University International Institute for Bio-Resource Research, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - N Abe
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - M Watanabe
- Meiji University International Institute for Bio-Resource Research, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - K Umeyama
- Meiji University International Institute for Bio-Resource Research, Higashimita Tama-ku Kawasaki Kanagawa, Japan
| | - H Nagashima
- Meiji University International Institute for Bio-Resource Research, Higashimita Tama-ku Kawasaki Kanagawa, Japan
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Mizuno T, Kasai Y, Sakakibara T, Yoshikawa T, Inaba T. Biomechanical study of rotational micromovement of the pedicle screw. Springerplus 2016; 5:1016. [PMID: 27441135 PMCID: PMC4938808 DOI: 10.1186/s40064-016-2694-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 06/28/2016] [Indexed: 12/11/2022]
Abstract
Background In regard to the fixation using a pedicle screw (PS) and rod system, the mechanism from the onset of the clear zone up to the development of loosening of the pedicle screw is not completely clarified. The purpose of this study is to determine the cause of the pedicle screw loosening by performing a biomechanical study with three-dimensional movie analysis. Methods Ten PS fixation model of the lumbar spines (L3–4) of boar cadavers were used. The rotational angles of the L3 and L4 vertebral body and the screw at the time of applying a ±5 Nm load in the left anterior and right posterior flexion directions respectively were calculated based on those at the time of applying no load. The absolute value of the difference in the rotational angles between each vertebral body with left anterior flexion and right posterior flexion and the inserted screws was defined as rotational micromovement. Results In both the left anterior and right posterior flexion directions, there were significant differences (p < 0.05) in the rotational angles between the screw and the vertebral body for both the L3 and L4 vertebral bodies. Conclusion Our biomechanical results showed that rotational micromovement occurred between the PS and the vertebral body, and repeated rotational micromovement might cause loosening of the screw or pullout of PS fixation.
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Affiliation(s)
- Tetsutaro Mizuno
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie 514-8507 Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie 514-8507 Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie 514-8507 Japan
| | - Takamasa Yoshikawa
- Department of Mechanical Engineering, Mie University, 1577 Kurimamachiyacyo, Tsu City, Mie 514-8507 Japan
| | - Tadashi Inaba
- Department of Mechanical Engineering, Mie University, 1577 Kurimamachiyacyo, Tsu City, Mie 514-8507 Japan
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Witayakom W, Paholpak P, Jirarattanaphochai K, Kosuwon W, Sirichativapee W, Wisanuyotin T, Laupattarakasem P, Sukhonthamarn K, Jeeravipoolvarn P, Sakakibara T, Kasai Y. Validation of the reliability of the Thai version of the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ). J Orthop Sci 2016; 21:124-7. [PMID: 26806331 DOI: 10.1016/j.jos.2015.12.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 11/17/2015] [Accepted: 12/17/2015] [Indexed: 12/01/2022]
Abstract
BACKGROUND The Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ) was developed to resolve problems associated with the original evaluation of cervical myelopathic patients. The aim of this study was to translate the JOACMEQ into Thai as per international recommendations, and to test its reliability and validity in the Thai context METHODS The JOACMEQ was translated into Thai, using international guidelines. Cervical myelopathy patients (n = 70; 31 males) were asked to complete the Thai version JOACMEQ twice (4 weeks apart). Test-retest reliability was analyzed using the intra-class correlation coefficient (ICC). Internal consistencies were analyzed using Cronbach's alpha, while the construct validity was compared with the Thai version modified SF-36; using the Spearman's rank correlation coefficient. RESULTS The Thai JOACMEQ produced good reliability (i.e., the ICC was >0.9 in 2 parameters and >0.8 in one). Overall the Cronbach's α for the 24 questions showed very high internal consistency (Cronbach's α > 0.8) and almost all Cronbach's α showed satisfactory internal consistency except for bladder function. The Spearman's rank correlation for all the JOACMEQ parameters had a positive correlation with all Thai SF 36 subscales, especially the quality of life parameter, which showed a strong correlation with all SF-36 subscales. CONCLUSION The Thai version of the JOACMEQ had satisfactory internal consistency and test-retest reliability: it also had good construct validity. It can therefore be used as a reliable tool for assessing quality of life for cervical myelopathy patients in Thailand.
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Affiliation(s)
- Witchaporn Witayakom
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Permsak Paholpak
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.
| | - Kitti Jirarattanaphochai
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Weerachai Kosuwon
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Winai Sirichativapee
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Taweechok Wisanuyotin
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Pat Laupattarakasem
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Kamolsak Sukhonthamarn
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Polasak Jeeravipoolvarn
- Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Biomedical Engineering, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Biomedical Engineering, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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Abstract
BACKGROUND Meditation is widely used as a therapeutic measure because it can effectively reduce stress, pain, and improve the mental health, but there are many unclear points about the psychological effects of meditation. AIMS The purpose of this study is to verify the psychological effects of meditation. METHOD The short version of Profile of Mood States (POMS-SF) and the Acceptance and Action Questionnaire-II (AAQ-II) were conducted to compare 97 Myanmar people practicing Vipassana contemplation training with 81 Myanmar nurses who did not have any experience with meditation. RESULTS The results of our study revealed that meditation mitigated depressive mood, anger, hostility, and fatigue and increased vigor. The enhancement of psychological flexibility occurred only after practicing meditation for more than a year. CONCLUSIONS It can be considered that meditation mitigates anger, hostility and fatigue and increases vigor at a relatively early stage after starting meditation practice, and if meditation practice is continued for more than a year, enhancement of psychological flexibility can also be expected.
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Affiliation(s)
- Yuichi Kasai
- a Department of Spinal Surgery and Medical Engineering , Mie University Graduate School of Medicine , Tsu City , Japan
| | - Toshihiko Sakakibara
- a Department of Spinal Surgery and Medical Engineering , Mie University Graduate School of Medicine , Tsu City , Japan
| | - Thein Aung Kyaw
- b Department of Orthopaedic Surgery , University of Medicine , Yangon-1, Yangon , Myanmar , and
| | - Zaw Wai Soe
- b Department of Orthopaedic Surgery , University of Medicine , Yangon-1, Yangon , Myanmar , and
| | - Zaw Min Han
- c Department of Orthopaedic Surgery , University of Medicine , Mandalay , Mandalay , Myanmar
| | - Maung Mg Htwe
- c Department of Orthopaedic Surgery , University of Medicine , Mandalay , Mandalay , Myanmar
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Oshino H, Sakakibara T, Inaba T, Yoshikawa T, Kato T, Kasai Y. Erratum to: A biomechanical comparison between cortical bone trajectory fixation and pedicle screw fixation. J Orthop Surg Res 2015; 10:154. [PMID: 26404705 PMCID: PMC4582715 DOI: 10.1186/s13018-015-0295-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 09/17/2015] [Indexed: 11/11/2022] Open
Affiliation(s)
- Hiroki Oshino
- Department of Mechanical Engineering, Mie University, Tsu City, Mie, Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, 514-8507, Mie, Japan
| | - Tadashi Inaba
- Department of Mechanical Engineering, Mie University, Tsu City, Mie, Japan
| | - Takamasa Yoshikawa
- Department of Mechanical Engineering, Mie University, Tsu City, Mie, Japan
| | - Takaya Kato
- Community-University Research Cooperation Center, Mie University, Tsu City, Mie, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, 514-8507, Mie, Japan.
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Abstract
The patient was a 13-year-old boy who complained of pain in both buttocks. Plain and reconstructive computed tomography (CT) images showed an ossified lesion within the dura mater at the L5-S2 levels, and arachnoiditis ossificans in the lumbosacral area was suspected. In the operative findings obtained after cutting the dura, a bone fragment 4.5 × 0.5 × 0.5 cm in size was observed in the center of the strongly adhesive nerve bundle of the cauda equina, which was removed en bloc. The postoperative clinical course of the patient was excellent. The case, along with a review of literature is presented.
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Affiliation(s)
- Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu, Mie
| | - Takao Sudo
- Department of Orthopedic Surgery, Mie University Graduate School of Medicine, Tsu, Mie
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Tsu, Mie
| | - Koji Akeda
- Department of Orthopedic Surgery, Mie University Graduate School of Medicine, Tsu, Mie
| | - Akihiro Sudo
- Department of Orthopedic Surgery, Mie University Graduate School of Medicine, Tsu, Mie
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Oshino H, Sakakibara T, Inaba T, Yoshikawa T, Kato T, Kasai Y. A biomechanical comparison between cortical bone trajectory fixation and pedicle screw fixation. J Orthop Surg Res 2015; 10:125. [PMID: 26275401 PMCID: PMC4537537 DOI: 10.1186/s13018-015-0270-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/05/2015] [Indexed: 01/16/2023] Open
Abstract
PURPOSE There have been several reports on the pullout strength of cortical bone trajectory (CBT) screws, but only one study has reviewed the stability of functional spine units using the CBT method. The purpose of this study was to compare vertebral stability after CBT fixation with that after pedicle screw (PS) fixation. METHODS In this study, 20 lumbar spine (L5-6) specimens were assigned to two groups: the CBT model group that underwent CBT screw fixation (n = 10) and the PS model group that underwent pedicle screw fixation (n = 10). Using a six-axis material testing machine, bend and rotation tests were conducted on each model. The angular displacement from the time of no load to the time of maximum torque was defined as range of motion (ROM), and then, the mean ROM in the bend and rotation tests and the mean rate of relative change of ROM in both the bend and rotation tests were compared between the CBT and PS groups. RESULTS There were no significant differences between the CBT and PS groups with regard to the mean ROMs and the mean rate of relative change of ROMs in both the bend and rotation tests. CONCLUSION Intervertebral stability after CBT fixation was similar to that after PS fixation.
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Affiliation(s)
- Hiroki Oshino
- Department of Mechanical Engineering, Mie University, Tsu City, Mie, Japan
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan
| | - Tadashi Inaba
- Department of Mechanical Engineering, Mie University, Tsu City, Mie, Japan
| | - Takamasa Yoshikawa
- Department of Mechanical Engineering, Mie University, Tsu City, Mie, Japan
| | - Takaya Kato
- Community-University Research Cooperation Center, Mie University, Tsu City, Mie, Japan
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan.
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Kondo Y, Suzuki K, Inoue Y, Takeshita M, Morita R, Kasai Y, Miyazaki T, Niki Y, Hanaoka H, Kaneko Y, Yasuoka H, Yamaoka K, Yoshimura A, Takeuchi T. FRI0609 Ultrasonography is a Useful Modality with Ease Access Reflecting Local Molecular Pathophysiology of Inflammatory Joint in Rheumatoid Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Sato A, Takamatsu Y, Kasai Y, Kobayashi S, Hino T, Ikeda K, Mizuguchi M. [JSNP Excellent Presentation Award for CINP2014: Tsc2 haploinsufficiency is associated with more severe autism-related behavioral deficits in mouse models of tuberous sclerosis complex]. Nihon Shinkei Seishin Yakurigaku Zasshi 2015; 35:51-52. [PMID: 26027069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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Teekhasaenee C, Kita K, Takegami K, Kawakita E, Sakakibara T, Kasai Y. Intraosseous lipoma of the third lumbar spine: a case report. J Med Case Rep 2015; 9:52. [PMID: 25889111 PMCID: PMC4357205 DOI: 10.1186/s13256-015-0528-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 01/14/2015] [Indexed: 12/14/2022] Open
Abstract
Introduction Intraosseous lipoma is a benign bone tumor, and the tumor occurs more frequently in the lower extremities. We present a very rare case of intraosseous lipoma occurring in the lumbar vertebral arch and spinous process. Case presentation A 54-year-old Japanese man presented with a three-month history of lumbar pain. Magnetic resonance imaging of the L3 vertebral arch and spinous process revealed high intensity on T1- and T2-weighted imaging, and it was suppressed on fat-suppression imaging and no enhancement showed on gadolinium contrast-enhanced imaging. Computed tomography imaging revealed an osteolytic change accompanied by marginal osteosclerosis in his third lumbar vertebral arch and spinous process, as well as a thinned and bulging bone cortex. An analgesic had been administered prior to his visit, but low back pain had persisted, so we performed curettage and filled the defect with hydroxyapatite bone. His low back pain was improved immediately after surgery, and no recurrence of tumor has been observed on computed tomography imaging as of three years postoperatively. Conclusions Symptomatic intraosseous lipoma of spine is very rare, but the patient may be surgically well-treated by curettage and reconstruction of the benign tumor.
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Affiliation(s)
- Chaipond Teekhasaenee
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu city, Mie, 514-8507, Japan. .,Department of Orthopedic Surgery, Thammasat University Hospital, 2 Prachan Road, Bangkok, 10200, Thailand.
| | - Koji Kita
- Department of Orthopedic Surgery, Saiseikai Matsusaka General Hospital, 1-15-6 Asahi-cho, Matsusaka city, Mie, 515-8557, Japan.
| | - Kenji Takegami
- Department of Orthopedic Surgery, Saiseikai Matsusaka General Hospital, 1-15-6 Asahi-cho, Matsusaka city, Mie, 515-8557, Japan.
| | - Eiji Kawakita
- Department of Orthopedic Surgery, Saiseikai Matsusaka General Hospital, 1-15-6 Asahi-cho, Matsusaka city, Mie, 515-8557, Japan.
| | - Toshihiko Sakakibara
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu city, Mie, 514-8507, Japan.
| | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu city, Mie, 514-8507, Japan.
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Okuda M, Nakano J, Matsuura N, Kasai Y, Gotoh M, Go T, Yokomise H. P-168 * CLINICAL FEATURES OF SURGICALLY RESECTED ADENOCARCINOMA WITH MICROPAPILLARY AND SOLID COMPONENT IN NON-SMALL-CELL LUNG CANCER. Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu167.168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wittayapairoj K, Wang Z, Sakakibara T, Kasai Y. Long-term result of posterolateral fusion of the lumbar spine using the Tadpole system. J Orthop Surg Res 2014; 9:33. [PMID: 24886530 PMCID: PMC4022536 DOI: 10.1186/1749-799x-9-33] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 05/01/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Failure of pedicle screw fixation is often seen in patients with severe osteoporosis. We developed new lumbar spinal instrumentation (Tadpole system) for elderly patients who have osteoporotic bone and poor general health status. The objective of this study was to document the long-term clinical outcomes after Tadpole system fixation, the rate of spinal fusion, the incidence of adjacent segment degeneration, the rate of instrumentation failure, and the overall complications. METHODS Sixty patients who underwent posterolateral spinal fusion using the Tadpole system, in whom a radiograph of the lumbar spine was taken at more than 5 years after operation, were involved in this study. The improvement rate of the Japanese Orthopaedic Association (JOA) score, rate of spinal fusion, presence or absence of adjacent segment degeneration, rate of instrumentation failure, and postoperative complications of each patient were assessed at 5 years postoperatively. RESULTS The mean JOA score improvement was 72.5%, and the posterolateral spinal fusion rate was 93.3% (56 of 60 patients) at the last follow-up. Adjacent segment degeneration occurred in only two patients who showed decreased intervertebral disc height, and instrumentation failure (hook deviation) was observed in one patient. No other complications were observed in any patients. CONCLUSION Tadpole system fixation shows favorable long-term clinical outcomes.
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Affiliation(s)
| | | | | | - Yuichi Kasai
- Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu city, Mie 514-8507, Japan.
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Nishio T, Hatano E, Okuno M, Kasai Y, Seo S, Taura K, Yasuchika K, Mori A, Kaido T, Uemoto S. Clinical Characteristics of Patients with Non-B Non-C Hepatocellular Carcinoma Undergoing Hepatic Resection. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kyaw TA, Wang Z, Sakakibara T, Yoshikawa T, Inaba T, Kasai Y. Biomechanical effects of pedicle screw fixation on adjacent segments. Eur J Orthop Surg Traumatol 2014; 24 Suppl 1:S283-7. [DOI: 10.1007/s00590-014-1416-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 01/10/2014] [Indexed: 10/25/2022]
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Tanaka N, Konno SI, Takeshita K, Fukui M, Takahashi K, Chiba K, Miyamoto M, Matsumoto M, Kasai Y, Kanamori M, Matsunaga S, Hosono N, Kanchiku T, Taneichi H, Hashizume H, Kanayama M, Shimizu T, Kawakami M. An outcome measure for patients with cervical myelopathy: the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ): an average score of healthy volunteers. J Orthop Sci 2014; 19:33-48. [PMID: 24317702 PMCID: PMC3929037 DOI: 10.1007/s00776-013-0494-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 10/21/2013] [Indexed: 11/30/2022]
Abstract
BACKGROUND An outcome measure to evaluate the neurological function of patients with cervical myelopathy was proposed by the Japanese Orthopaedic Association (JOA score) and has been widely used in Japan. However, the JOA score does not include patients' satisfaction, disability, handicaps, or general health, which can be affected by cervical myelopathy. In 2007, a new outcome measure, the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ), which is a self-administered questionnaire, was developed. However, the influence of age and gender on the scores has not been fully examined. The purpose of this study was to establish the standard value of the JOACMEQ by age using healthy volunteers. METHODS This study was conducted in 23 university hospitals and their affiliated hospitals from September to December 2011. The questionnaire included 24 questions for evaluation of physical function of the cervical spine and spinal cord. A total of 1,629 healthy volunteers were recruited for the study. The ages ranged from 20 to 89 years old. RESULTS The volunteers comprised 798 men and 831 women. In the elderly healthy volunteers, the JOACMEQ scores decreased with age. In general, the scores for cervical spine function and upper/lower extremity function were retained up to the 60s, then decreased in the 70s and 80s. The scores for quality of life were retained up to the 70s; however, the score for bladder function was retained up to the 40s, then declined with age from the 50s to 80s. CONCLUSION The standard values of the JOACMEQ by age were established. Differences in the scores were found among different generations. Patients with cervical myelopathy should be evaluated with this new self-administered questionnaire taking into account the standard values according to different ages.
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Affiliation(s)
- Nobuhiro Tanaka
- Department of Orthopaedic Surgery, Institute of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, 734-8551, Japan,
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Asanuma Y, Fujimoto H, Nakabayashi H, Akeda K, Asanuma K, Tanaka M, Nagakura T, Miura Y, Iino T, Ogawa K, Kasai Y, Sudo A. Extradural cryptococcoma at the sacral spine without bone involvement in an immunocompetent patient. J Orthop Sci 2014; 19:1040-5. [PMID: 23712789 PMCID: PMC4244543 DOI: 10.1007/s00776-013-0413-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 05/06/2013] [Indexed: 01/04/2023]
Affiliation(s)
- Yumiko Asanuma
- Department of Orthopedic Surgery, Mie Chuo Medical Center, 2158-5 Hisai Myojincho, Tsu, Mie, 514-1101, Japan,
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Kasai Y, Hatano E, Iguchi K, Seo S, Taura K, Yasuchika K, Mori A, Kaido T, Tanaka S, Shibata T, Uemoto S. Prediction of the remnant liver hypertrophy ratio after preoperative portal vein embolization. ACTA ACUST UNITED AC 2013; 51:129-37. [PMID: 24280661 DOI: 10.1159/000356297] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 10/14/2013] [Indexed: 12/26/2022]
Abstract
BACKGROUND Portal vein embolization (PVE) is considered to improve the safety of major hepatectomy. Various conditions might affect remnant liver hypertrophy after PVE. The aim of the present study was to clarify the factors that affect remnant liver hypertrophy and to establish a prediction formula for the hypertrophy ratio. METHODS Fifty-nine patients who underwent preoperative PVE for cholangiocarcinoma (39 patients), metastatic carcinoma (10 patients), hepatocellular carcinoma (8 patients), and other diseases (2 patients) were enrolled in this study. For the prediction of the hypertrophy ratio, a formula with stepwise multiple regression analysis was set up. The following parameters were used: age, gender, future liver remnant ratio to total liver (FLR%), plasma disappearance rate of indocyanine green (ICGK), platelet count, prothrombin activity, serum albumin, serum total bilirubin at the time of PVE and the maximum value before PVE (Max Bil), as well as a history of cholangitis, diabetes mellitus, and chemotherapy. RESULTS The mean hypertrophy ratio was 28.8%. The 5 parameters detected as predictive factors were age (p = 0.015), FLR% (p < 0.001), ICGK (p = 0.112), Max Bil (p < 0.001), and history of chemotherapy (p = 0.007). The following prediction formula was established: 101.6 - 0.78 × age - 0.88 × FLR% + 128 × ICGK - 1.48 × Max Bil (mg/dl) - 21.2 × chemotherapy. The value obtained using this formula significantly correlated with the actual value (r = 0.72, p < 0.001). A 10-fold cross validation also showed significant correlation (r = 0.62, p < 0.001), and a hypertrophy ratio <20% was predictable with a sensitivity of 100% and a specificity of 90.9%. Moreover, technetium-99m-diethylenetriaminepentaacetic acid-galactosyl human serum albumin scintigraphy showed a significantly smaller increase in the uptake ratio of the remnant liver in patients with prediction values <20% than in those with values ≥20% (6.8 vs. 20.8%, p = 0.030). CONCLUSIONS The prediction formula can prognosticate the hypertrophy ratio after PVE, which may provide a new therapeutic strategy for major hepatectomy.
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Affiliation(s)
- Y Kasai
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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