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142 results on '"Tatsumura, Masaki"'

2. Impact of causative organism identification on clinical outcomes after minimally invasive posterior fixation for thoracolumbar pyogenic spondylitis: multicenter retrospective cohort study

Author

Gamada, Hisanori, Funayama, Toru, Asada, Tomoyuki, Setojima, Yusuke, Nakagawa, Takane, Sunami, Takahiro, Sakashita, Kotaro, Ogata, Yosuke, Okuwaki, Shun, Ogawa, Kaishi, Shibao, Yosuke, Kumagai, Hiroshi, Nagashima, Katsuya, Fujii, Kengo, Takeuchi, Yosuke, Tatsumura, Masaki, Shiina, Itsuo, Uesugi, Masafumi, and Koda, Masao

Published
2024
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3. Unique characteristics of bone union at the infected vertebrae after minimally invasive posterior fixation without bone grafting in thoracolumbar pyogenic spondylitis: a retrospective multicenter cohort study

Author

Gamada, Hisanori, Funayama, Toru, Nagasawa, Keigo, Nakagawa, Takane, Okuwaki, Shun, Ogawa, Kaishi, Shibao, Yosuke, Nagashima, Katsuya, Fujii, Kengo, Takeuchi, Yosuke, Tatsumura, Masaki, Shiina, Itsuo, Nakagawa, Tsukasa, Yamazaki, Masashi, and Koda, Masao

Published
2024
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4. Pedicle screw insertion into infected vertebrae reduces operative time and range of fixation in minimally invasive posterior fixation for thoracolumbar pyogenic spondylitis: a multicenter retrospective cohort study

Author

Gamada, Hisanori, Funayama, Toru, Setojima, Yusuke, Nagasawa, Keigo, Nakagawa, Takane, Sakashita, Kotaro, Okuwaki, Shun, Ogawa, Kaishi, Izawa, Shigeo, Shibao, Yosuke, Kumagai, Hiroshi, Nagashima, Katsuya, Fujii, Kengo, Takeuchi, Yosuke, Tatsumura, Masaki, Shiina, Itsuo, Uesugi, Masafumi, Yamazaki, Masashi, and Koda, Masao

Published
2024
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17. Exploring factors affecting activities of daily living in patients with osteoporotic vertebral fractures managed conservatively: a post-hoc analysis of a prospective cohort study.

Author

Funayama, Toru, Tatsumura, Masaki, Fujii, Kengo, Shibao, Yosuke, Okuwaki, Shun, Sakashita, Kotaro, Sunami, Takahiro, Inomata, Kento, Gamada, Hisanori, Miura, Kousei, Noguchi, Hiroshi, Takahashi, Hiroshi, Koda, Masao, and Yamazaki, Masashi

Subjects
*VERTEBRAL fractures, *BONE fractures, *VERTEBRAE injuries, *ACTIVITIES of daily living, *MAGNETIC resonance imaging, *LONGITUDINAL method
Abstract

Study Design: A post-hoc analysis of a prospective cohort study. Purpose: This study aimed to identify factors at the time of injury associated with declining activities of daily living (ADLs) in the chronic phase of osteoporotic vertebral fractures (OVFs) managed conservatively. Overview of Literature: Although a conservative approach is the treatment of choice for OVFs, ADLs do not improve or eventually decrease in some cases. However, the risk factors for ADL decline after the occurrence of OVFs, particularly the difference between those with or without initial bed rest, are unknown. Methods: A total of 224 consecutive patients with OVFs aged ≥65 years who received treatment within 2 weeks after the occurrence of injury were enrolled. The patients were followed up for 6 months thereafter. The criteria for evaluating the degree of independence were applied to evaluate ADLs. Multivariable analysis with a logistic regression model was performed to evaluate the risk factors for ADL decline. Results: In total, 49/224 patients (21.9%) showed a decline in ADLs. Of these, 23/116 patients (19.8%) in the rest group and 26/108 patients (24.1%) in the no-rest group experienced a decline in ADLs. In the logistic regression analyses, a diffuse low signal on T2-weighted magnetic resonance imaging (MRI) (odds ratio, 5.78; 95% confidence interval, 2.09–16.0; p=0.0007) and vertebral instability (odds ratio, 3.89; 95% confidence interval, 1.32–11.4; p=0.0135) were identified as independent factors in the rest and no-rest groups, respectively. Conclusions: In patients with acute OVFs, a diffuse low signal on T2-weighted MRI and severe vertebral instability were independently associated with ADL decline in patients treated with and without initial bed rest, respectively. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Epidemiological differences between the sexes in adolescent patients with lumbar spondylolysis: a single-institution experience in Japan

Author

Asai, Reo, primary, Tatsumura, Masaki, additional, Gamada, Hisanori, additional, Okuwaki, Shun, additional, Eto, Fumihiko, additional, Nagashima, Katsuya, additional, Takeuchi, Yousuke, additional, Funayama, Toru, additional, Mammoto, Takeo, additional, Hirano, Atsushi, additional, and Yamazaki, Masashi, additional

Published
2023
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29. Two Cases of Delayed Onset Myelopathy at the Cervicothoracic Junction Caused by Spontaneous Multiple Interlaminar Bony Fusion after Cervical Laminoplasty in Patients with Ossification of the Posterior Longitudinal Ligament

Author

Funayama, Toru, primary, Asada, Tomoyuki, additional, Shibao, Yosuke, additional, Eto, Fumihiko, additional, Sato, Kosuke, additional, Miura, Kousei, additional, Noguchi, Hiroshi, additional, Takahashi, Hiroshi, additional, Tatsumura, Masaki, additional, Koda, Masao, additional, and Yamazaki, Masashi, additional

Published
2023
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31. Treatment of Thoracolumbar Pyogenic Spondylitis with Minimally Invasive Posterior Fixation without Anterior Lesion Debridement or Bone Grafting: A Multicenter Case Study

Author

Gamada, Hisanori, primary, Funayama, Toru, additional, Yamaji, Akihiro, additional, Okuwaki, Shun, additional, Asada, Tomoyuki, additional, Izawa, Shigeo, additional, Kumagai, Hiroshi, additional, Fujii, Kengo, additional, Amano, Kuniaki, additional, Shiina, Itsuo, additional, Tatsumura, Masaki, additional, Uesugi, Masafumi, additional, Nakagawa, Tsukasa, additional, Yamazaki, Masashi, additional, and Koda, Masao, additional

Published
2023
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34. Main and contralateral side stages of lesion affected bone union in the conservative treatment of adolescent lumbar spondylolysis: a multivariable analysis of 217 patients and 298 lesions in a retrospective cohort study.

Author

Gamada, Hisanori, Tatsumura, Masaki, Asai, Reo, Okuwaki, Shun, Funayama, Toru, and Yamazaki, Masashi

Abstract

Background: Factors affecting bone union in the conservative treatment of adolescent lumbar spondylolysis remain controversial. We aimed to examine these factors along with advances in diagnostic imaging using multivariable analysis of a sufficient number of patients and lesions. Methods: In this retrospective study, high-school-aged patients or younger (n = 514) who were diagnosed with lumbar spondylolysis from 2014 to 2021 were investigated. We included patients with acute fractures who showed signal changes around the pedicle on magnetic resonance imaging and who completed conservative treatment. The following factors were investigated at the initial visit: age, sex, level of lesion, main side stage, presence and stage of contralateral side lesion, and presence of spina bifida occulta. The association of each factor with bone union was evaluated through a multivariable analysis. Results: Altogether, 298 lesions in 217 patients (174 boys and 43 girls; mean age: 14.3 years) were included in this study. Multivariable logistic regression analysis of all factors showed that the main side progressive stage was more likely associated with nonunion as compared to the pre-lysis (OR: 5.86; 95% confidence interval [CI]: 2.00–18.8; p = 0.0011) and early stages (OR: 3.77; 95% CI: 1.72–8.46; p = 0.0009). Regarding the contralateral side stage, the terminal stage was more likely to be associated with nonunion. Conclusion: In the conservative treatment of lumbar spondylolysis, the factors affecting bone union were the main and contralateral side stages. Sex, age, level of lesion, or spina bifida occulta had no significant effects on bone union. The main, progressive, and contralateral side terminal stages were negative predictors of bone union. Trial registration This study was retrospectively registered. [ABSTRACT FROM AUTHOR]

Published
2023
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36. Unidirectional porous beta-tricalcium phosphate as a potential bone regeneration material for infectious bony cavity without debridement in pyogenic spondylitis

Author

Funayama, Toru, primary, Noguchi, Hiroshi, additional, Shibao, Yosuke, additional, Sato, Kosuke, additional, Kumagai, Hiroshi, additional, Miura, Kousei, additional, Takahashi, Hiroshi, additional, Tatsumura, Masaki, additional, Koda, Masao, additional, and Yamazaki, Masashi, additional

Published
2022
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38. Surgical Apgar score is significantly useful as a predictor of major complications after thoracic spinal surgery: a retrospective cohort study

Author

Shibao, Yosuke, primary, Miura, Kousei, additional, Koda, Masao, additional, Asada, Tomoyuki, additional, Sato, Kosuke, additional, Eto, Fumihiko, additional, Kono, Mamoru, additional, Mataki, Kentaro, additional, Kumagai, Hiroshi, additional, Nagashima, Katsuya, additional, Noguchi, Hiroshi, additional, Takahashi, Hiroshi, additional, Funayama, Toru, additional, Tatsumura, Masaki, additional, and Yamazaki, Masashi, additional

Published
2022
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40. A Case of Postoperative Recurrent Lumbar Disc Herniation Conservatively Treated with Novel Intradiscal Condoliase Injection

Author

Funayama, Toru, Setojima, Yusuke, Shibao, Yosuke, Noguchi, Hiroshi, Miura, Kousei, Eto, Fumihiko, Sato, Kosuke, Kono, Mamoru, Asada, Tomoyuki, Takahashi, Hiroshi, Tatsumura, Masaki, Koda, Masao, and Yamazaki, Masashi

Subjects
Article Subject
Abstract

Although postoperative recurrent lumbar disc herniation (rec-LDH) is uncommon, it is a challenging situation that requires revision surgery when conservative treatment fails. Recently, an agent inducing chemical dissolution of the nucleus pulposus using condoliase has been approved as a novel intradiscal treatment for LDH. To date, no evidence has been reported regarding its effectiveness in the treatment of postoperative rec-LDH. A 25-year-old man with a history of LDH in L4/5, who underwent transforaminal full endoscopic lumbar discectomy when he was 17 years old, complained of severe pain radiating to his left leg since 1 month. The straight leg-raising test was limited to 25° on the left side. Lumbar T2-weighted magnetic resonance imaging (MRI) showed intracanal, left-sided transligamentous disc herniation at L4/5 with high-signal intensity. Because the conservative treatment with oral analgesics and selective left L5 nerve root block failed, the patient requested intradiscal condoliase injection instead of revision surgery. There were no adverse events reported after the condoliase treatment, and the pain radiating to the left leg improved within 2 weeks. A lumbar MRI performed 2 months after treatment revealed that the disc herniation had significantly decreased in size. The straight leg-raising test examined 3 months after treatment was negative. In this case, the disc herniation was of the transligamentous type and showed a high-signal intensity on T2-weighted MRI which could be suitably treated by condoliase injection therapy. This case report is the first to suggest that intradiscal condoliase injection could be a useful and novel conservative treatment option to treat postoperative rec-LDH.

Published
2022
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43. Potential Predictive Factors for Clinical Outcomes Following Progressive Pain Reduction Associated With Conservative Treatment for Recently Diagnosed Osteoporotic Vertebral Fractures: A Case Control Study

Author

Shibao, Yosuke, primary, Koda, Masao, additional, Takeuchi, Yosuke, additional, Asada, Tomoyuki, additional, Sato, Kosuke, additional, Kono, Mamoru, additional, Eto, Fumihiko, additional, Miura, Kousei, additional, Noguchi, Hiroshi, additional, Takahashi, Hiroshi, additional, Funayama, Toru, additional, Tatsumura, Masaki, additional, and Yamazaki, Masashi, additional

Published
2022
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50. Therapeutic Effects of Conservative Treatment with 2-Week Bed Rest for Osteoporotic Vertebral Fractures: A Prospective Cohort Study.

Author

Funayama, Toru, Tatsumura, Masaki, Fujii, Kengo, Ikumi, Akira, Okuwaki, Shun, Shibao, Yosuke, Koda, Masao, Yamazaki, Masashi, and Tsukuba Spine Group

Subjects
*BED rest, *VERTEBRAL fractures, *LONGITUDINAL method
Abstract

Update: This article was updated on October 19, 2022, because of previous errors, which were discovered after the preliminary version of the article was posted online. On page 1787, in the legend for Figure 2, the sentence that had read "The vertebral collapse rate (in %) was defined as 1 - (A/P) × 100, and vertebral instability (in %) was defined as the difference in vertebral collapse rate between the loaded and non-loaded images." now reads "The vertebral collapse rate (in %) was defined as (1 - [A/P]) × 100, and vertebral instability (in %) was defined as the difference in vertebral collapse rate between the loaded and non-loaded images." On page 1788, in the section entitled "Data Collection," the sentence that had read "The vertebral collapse rate (in %) was defined as 1 - (anterior vertebral wall height/posterior vertebral wall height) × 100, and vertebral instability (in %) was defined as the difference in vertebral collapse rate between the loaded and non-loaded images 9 ." now reads "The vertebral collapse rate (in %) was defined as (1 - [anterior vertebral wall height/posterior vertebral wall height]) × 100, and vertebral instability (in %) was defined as the difference in vertebral collapse rate between the loaded and non-loaded images 9 ." Finally, on page 1791, in Table IV, the footnote for the "Primary outcome" row that had read "N = 113 in the rest group and 99 in the no-rest group." now reads "N = 116 in the rest group and 108 in the no-rest group." [ABSTRACT FROM AUTHOR]

Published
2022
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