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2. Laterality of lumbar disc herniation

Author

Ito, Sadayuki, Nakashima, Hiroaki, Sato, Koji, Deguchi, Masao, Matsubara, Yuji, Kanemura, Tokumi, Urasaki, Tetsuya, Yoshihara, Hisatake, Sakai, Yoshihito, Ito, Keigo, Shinjo, Ryuichi, Ando, Kei, Machino, Masaaki, Segi, Naoki, Tomita, Hiroyuki, Koshimizu, Hiroyuki, and Imagama, Shiro

Published
2023
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6. Early surgery within 48 hours of admission for hip fracture did not improve 1-year mortality in Japan: a single-institution cohort study.

Author

Iida, Hiroki, Takegami, Yasuhiko, Sakai, Yoshihito, Watanabe, Tsuyoshi, Osawa, Yusuke, and Imagama, Shiro

Subjects
MORTALITY prevention, HIP fractures, EARLY medical intervention, PATIENTS, HOSPITAL admission & discharge, QUESTIONNAIRES, TREATMENT effectiveness, AGE distribution, BARTHEL Index, TIME
Abstract

Introduction: Early surgery for hip fracture, within 48 hours of hospital admission, is effective in reducing mortality. However, the average preoperative waiting time for hip fractures in Japan is 4.5 days and the 1-year mortality rate after a hip fracture is 10% in Japan. This study aimed to investigate whether early surgery, within 48 hours, could reduce the 1-year mortality rate in patients with hip fractures in Japan. Methods: This cohort study involved 402 consecutive patients with hip fractures who underwent surgical treatment between January 2013 and September 2019. The exclusion criteria were an age of <60 years and in-hospital injury. A total of 389 patients were included in this study. The patients were divided into two groups: those who underwent early surgery within 48 hours of admission (early group) and those who di not undergo early surgery (delayed group). We compared patient characteristics and treatment outcomes between the 2 groups. Results: A comparison of patient characteristics revealed that the early group had lower hemoglobin levels (P=0.046), lower C-reactive protein levels (P = 0.031), lower numbers of patients with weekend hospitalization, lower numbers of patients with a history of using medications that may cause bleeding (P < 0.01), and who received general anaesthesia (P < 0.01). However, there were no significant differences with regard to the other variables between the 2 groups. A treatment outcome analysis showed that the early group had shorter waiting times for surgery (P < 0.01) and shorter stays in acute-care wards (P < 0.01). However there were no differences in the total hospital stay, Barthel index at discharge, home discharge rates, in-hospital mortality rates, and 1-year mortality. Conclusion: Our findings indicate that early surgery did not reduce the 1-year mortality rate in older patients with hip fractures in Japan. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Targeted vibratory therapy as a treatment for proprioceptive dysfunction: Clinical trial in older patients with chronic low back pain.

Author

Sakai, Yoshihito, Morita, Yoshifumi, Kawai, Keitaro, Fukuhara, Jo, Ito, Tadashi, Yamazaki, Kazunori, Watanabe, Tsuyoshi, Wakao, Norimitsu, and Matsui, Hiroki

Subjects
*PROPRIOCEPTION, *CHRONIC pain, *OLDER patients, *LUMBAR pain, *CLINICAL trials, *OLDER people, *BRAIN stimulation
Abstract

Introduction: Proprioceptive function declines with age, leading to falls, pain, and difficulties in performing activities of daily living among older adults. Although individuals with low back pain (LBP) exhibit decreased lumbosacral proprioception in various postures, the mechanism by which reduced proprioceptive function causes LBP remains uncertain. Vibratory stimulation may enhance proprioceptive function; however, its efficacy in treating LBP has not been investigated. Thus, we investigated the feasibility of improving proprioceptive function and its effect on alleviating chronic LBP in older patients through targeted vibratory therapy (TVT) administration. Methods: This single arm designed trial included older patients aged >65 years with non-specific chronic LBP. TVT involved applying vibratory stimulation, matching the frequency of dysfunctional receptors, for 1 min daily over 14 days to activate proprioceptors; patients performed TVT three times daily at home. In cases of reduced proprioceptive function at multiple sites, TVT was aimed at the lowest frequency band value. LBP and proprioceptive function were evaluated at 2 weeks after TVT and at 2 weeks after the end of TVT in patients with declined proprioception in the trunk or lower extremities. Results: Overall, 56 patients with chronic LBP were enrolled; 32 patients were recruited for treatment based on a proprioceptive dysfunction diagnosis and 24 patients were recruited with a normal diagnosis with no significant differences observed between the two sets of patients in sarcopenia-related factors and clinical proprioception-related characteristics. No patient had any adverse events. Two weeks after TVT, the numerical pain rating scale score improved to <3 points in 78.1% of patients, with 73.1% of patients achieving a score of ≤ 3 points. Proprioceptive function improved in 81.3% of cases, and engagement in activities of daily living improved significantly. Conclusions: TVT demonstrated efficacy in improving proprioception and alleviating LBP in older patients with impaired proprioceptive function without affecting non-targeted proprioceptors. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Response to the Letter to the Editor: Evaluation of the Association between Neck Pain and the Trapezius Muscles in Patients with Cervical Myelopathy Using Motor Evoked Potential: A Retrospective Study

Author

Ito, Sadayuki, primary, Sakai, Yoshihito, additional, Harada, Atsushi, additional, Ando, Kei, additional, Kobayashi, Kazuyoshi, additional, Nakashima, Hiroaki, additional, Machino, Masaaki, additional, Kambara, Shunsuke, additional, Inoue, Taro, additional, Hida, Tetsuro, additional, Ito, Kenyu, additional, Ishiguro, Naoki, additional, and Imagama, Shiro, additional

Published
2024
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17. Neck pain after cervical laminoplasty is associated with postoperative atrophy of the trapezius muscle

Author

Ito, Sadayuki, Sakai, Yoshihito, Ando, Kei, Nakashima, Hiroaki, Machino, Masaaki, Segi, Naoki, Tomita, Hiroyuki, Koshimizu, Hiroyuki, Hida, Tetsuro, Ito, Kenyu, Harada, Atsushi, and Imagama, Shiro

Subjects
cervical laminoplasty, neck pain, trapezius muscle, cross-sectional areas, cervical myelopathy
Abstract

Cervical laminoplasty is a safe and effective treatment for cervical myelopathy. However, it has a higher frequency of postoperative axial pain than other methods. A variety of causes of postoperative axial pain have been reported, but these have not been fully elucidated. This study aimed to investigate the association between postoperative axial pain and changes in the posterior neck muscles before and after surgery. The study included 93 patients with cervical myelopathy who underwent surgery at our institute between June 2010 and March 2013. The patients with greater preoperative and 1-year postoperative neck pain visual analog scale scores comprised the neck pain group. The cross-sectional area of the cervical posterior extensor muscles and the trapezius muscle were measured by magnetic resonance imaging before and 1 year after surgery at the C3/4, C4/5, and C5/6 levels to compare with neck pain. The total cross-sectional area atrophy rate (C3/C4, C4/C5, and C5/C6) of the trapezius muscle was significantly larger in patients with neck pain (12.8 ± 13.2) than in those without (6.2 ± 14.4; p

Published
2023

23. Association between Postoperative Neck Pain and Intraoperative Transcranial Motor-Evoked Potential Waveforms of the Trapezius Muscles in Patients with Cervical Myelopathy Who Underwent Cervical Laminoplasty

Author

Ito, Sadayuki, primary, Sakai, Yoshihito, additional, Ando, Kei, additional, Nakashima, Hiroaki, additional, Machino, Masaaki, additional, Segi, Naoki, additional, Tomita, Hiroyuki, additional, Koshimizu, Hiroyuki, additional, Hida, Tetsuro, additional, Ito, Kenyu, additional, Harada, Atsushi, additional, and Imagama, Shiro, additional

Published
2023
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32. Trends in the numbers of spine surgeries and spine surgeons over the past 15 years

Author

Kobayashi, Kazuyoshi, Sato, Koji, Kato, Fumihiko, Kanemura, Tokumi, Yoshihara, Hisatake, Sakai, Yoshihito, Shinjo, Ryuichi, Ohara, Tetsuya, Yagi, Hideki, Matsubara, Yuji, Ando, Kei, Nakashima, Hiroaki, and Imagama, Shiro

Subjects
spine surgery, Japanese Spine Surgery and Related Research (JSSR), specialist, epidemiology, elderly
Abstract

The purpose of this study is to examine trends in spine surgeries at ten facilities over 15 years, and to analyze relationships with the number of spine surgeons at these facilities. The subjects were patients who underwent spine surgery at the ten facilities from 2003 to 2017. Data were collected every year via a questionnaire designed to obtain clinicopathological and surgical information. There were 37,601 spine surgeries (60.2% male) recorded in the registry at 9 facilities in the Nagoya Spine Group (NSG) between 2003 and 2017, with an increase in the annual number of surgeries by 2.4 times over 15 years. On the other hand, the number of spine surgeons has increased by just under 1.5 times. Instrumentation surgeries increased from 959 in 2003 to 2,276 in 2017 (2.3 times). There was a particularly marked increase in surgeries for spinal degenerative disease from 1,075 in 2003 to 2,821 in 2017 (2.6 times). The number of surgeries performed per surgeon increased from 61.4 in 2003 to 102.8 in 2017, while the average number of spine surgeons per hospital increased from 2.6 in 2003 to 3.7 in 2017. In conclusion, with heavier burden on spine surgeons and the major changes in the spine surgery environment, training and increasing surgeons with advanced expertise and skills will become increasingly important., This is an Open Access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. To view the details of this license, please visit (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Published
2022

33. Laterality of lumbar disc herniation

Author

Ito, Sadayuki, primary, Nakashima, Hiroaki, additional, Sato, Koji, additional, Deguchi, Masao, additional, Matsubara, Yuji, additional, Kanemura, Tokumi, additional, Urasaki, Tetsuya, additional, Yoshihara, Hisatake, additional, Sakai, Yoshihito, additional, Ito, Keigo, additional, Shinjo, Ryuichi, additional, Ando, Kei, additional, Machino, Masaaki, additional, Segi, Naoki, additional, Tomita, Hiroyuki, additional, Koshimizu, Hiroyuki, additional, and Imagama, Shiro, additional

Published
2022
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34. Proprioception and Geriatric Low Back Pain

Author

Sakai, Yoshihito, primary, Watanabe, Tsuyoshi, additional, Wakao, Norimitsu, additional, Matsui, Hiroki, additional, Osada, Naoaki, additional, Sugiura, Takaya, additional, Morita, Yoshifumi, additional, Kawai, Keitaro, additional, Ito, Tadashi, additional, and Yamazaki, Kazunori, additional

Published
2022
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35. Myelopathy caused by intrathecal remnants of oil-based contrast medium

Author

Ito, Sadayuki, primary, Sakai, Yoshihito, additional, Harada, Atsushi, additional, Ando, Kei, additional, Kobayashi, Kazuyoshi, additional, Machino, Masaaki, additional, Ota, Kyotaro, additional, Morozumi, Masayoshi, additional, Tanaka, Satoshi, additional, Kanbara, Shunsuke, additional, Ishiguro, Naoki, additional, and Imagama, Shiro, additional

Published
2022
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43. Appropriate timing of surgical intervention for the proximal type of cervical spondylotic amyotrophy

Author

Tauchi, Ryoji, Imagama, Shiro, Inoh, Hidefumi, Yukawa, Yasutsugu, Kanemura, Tokumi, Sato, Koji, Matsubara, Yuji, Harada, Atsushi, Sakai, Yoshihito, Hachiya, Yudo, Kamiya, Mitsuhiro, Yoshihara, Hisatake, Ito, Zenya, Ando, Kei, Hirano, Kenichi, Muramoto, Akio, Matsui, Hiroki, Matsumoto, Tomohiro, Ukai, Junichi, Kobayashi, Kazuyoshi, Shinjo, Ryuichi, Nakashima, Hiroaki, and Ishiguro, Naoki

Published
2015
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45. Evaluation of the Association between Neck Pain and the Trapezius Muscles in Patients with Cervical Myelopathy Using Motor Evoked Potential: A Retrospective Study

Author

Ito, Sadayuki, primary, Sakai, Yoshihito, additional, Harada, Atsushi, additional, Ando, Kei, additional, Kobayashi, Kazuyoshi, additional, Nakashima, Hiroaki, additional, Machino, Masaaki, additional, Kambara, Shunsuke, additional, Inoue, Taro, additional, Hida, Tetsuro, additional, Ito, Kenyu, additional, Ishiguro, Naoki, additional, and Imagama, Shiro, additional

Published
2021
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50. Seasonal variation in incidence and causal organism of surgical site infection after PLIF/TLIF surgery: A multicenter study

Author

Kobayashi, Kazuyoshi, primary, Ando, Kei, additional, Kato, Fumihiko, additional, Kanemura, Tokumi, additional, Sato, Koji, additional, Hachiya, Yudo, additional, Matsubara, Yuji, additional, Sakai, Yoshihito, additional, Yagi, Hideki, additional, Shinjo, Ryuichi, additional, Ishiguro, Naoki, additional, and Imagama, Shiro, additional

Published
2021
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