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719 results on '"Demura, Satoru"'

4. Instrumentation failure following pediatric spine deformity growth-sparing surgery using traditional growing rods or vertical expandable prosthetic titanium ribs

Author

Yokogawa, Noriaki, Demura, Satoru, Ohara, Tetsuya, Tauchi, Ryoji, Takimura, Kosuke, Yanagida, Haruhisa, Yamaguchi, Toru, Watanabe, Kota, Suzuki, Satoshi, Uno, Koki, Suzuki, Teppei, Watanabe, Kei, Kotani, Toshiaki, Nakayama, Keita, Oku, Norihiro, Taniguchi, Yuki, Murakami, Hideki, Yamamoto, Takuya, Kawamura, Ichiro, Takeshita, Katsushi, Sugawara, Ryo, Kikkawa, Ichiro, and Kawakami, Noriaki

Published
2024
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16. Knee flexor strength at 6 months after anterior cruciate ligament reconstruction using hamstring tendon can be predicted from that at 3 months.

Author

Sengoku, Takuya, Nakase, Junsuke, Mizuno, Yushin, Ishida, Yoshihiro, Yanatori, Yusuke, Takemoto, Naoki, and Demura, Satoru

Subjects
ANTERIOR cruciate ligament surgery, RECEIVER operating characteristic curves, MULTIPLE regression analysis, PREOPERATIVE period, LOGISTIC regression analysis
Abstract

Purpose: This study aimed to identify factors influencing persistent muscle weakness in knee flexor strength after anterior cruciate ligament (ACL) reconstruction using the hamstring tendon and establish a clear cut‐off value at 3 months postoperatively for the limb symmetry index (LSI) to exceed 90% at 6 months postoperatively. Methods: One hundred forty‐eight patients undergoing ACL reconstruction were included and categorised into two groups based on knee flexor strength at 6 months postoperatively: patients with LSI of 90% or greater (achieved group: n = 114) and patients with LSI less than 85% (nonachieved group: n = 34). Items with significant differences between the two groups (preoperative waiting period, LSI to body weight ratio of knee flexor and extensor strength at 3 months postoperatively and peak torque angle of knee flexor muscle) were included in the multiple logistic regression analysis. Additionally, a receiver operating characteristic curve was used to calculate the cut‐off value of the LSI at 3 months postoperatively, which was required to achieve the LSI criteria for knee flexor strength 6 months postoperatively. Results: Multiple logistic regression analysis extracted the preoperative waiting period and LSI for knee flexor strength at 3 months postoperatively. The cut‐off value at 3 months postoperatively was 76.9% (area under the curve value, 0.82; sensitivity, 0.76; and specificity, 0.81) of the LSI. Conclusion: The LSI of at least 76.9% for knee flexor strength at 3 months after ACL reconstruction was an indicator for achieving the 6 months postoperatively. This is a criterion to aim for, considering the stress on the graft and the regeneration process of the semitendinosus tendon. Level of evidence: Level III. [ABSTRACT FROM AUTHOR]

Published
2024
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19. The Validation Of The Japanese Version Of The Scoliosis Research Society-30 Questionnaire For Adolescent Idiopathic Scoliosis Patients

Author

Arima, Hideyuki, primary, Yamato, Yu, additional, Shibata, Yosuke, additional, Oba, Hiroki, additional, Takahashi, Jun, additional, Watanabe, Kei, additional, Sugawara, Ryo, additional, Takeshita, Katsushi, additional, Omura, Takao, additional, Carreon, Leah, additional, Arai, Yasuhisa, additional, Asada, Tomoyuki, additional, Demura, Satoru, additional, Doi, Toru, additional, Matsumura, Akira, additional, Suzuki, Satoshi, additional, Takahashi, Shinji, additional, Takeuchi, Takumi, additional, Ueda, Haruki, additional, and Hosogane, Naobumi, additional

Published
2024
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22. Constitutional varus knee due to tibial deformity is common and represents a good indication for high tibial osteotomy in Japanese population: Consideration of 1010 knees.

Author

Abe, Kensaku, Goshima, Kenichi, Morinaga, Toshio, Nozaki, Masahiro, Fukushima, Hiroaki, Kato, Jiro, Hanaki, Shunta, Demura, Satoru, and Murakami, Hideki

Subjects
JAPANESE people, KNEE, OSTEOTOMY, HUMAN abnormalities, OPERATIVE surgery
Abstract

Purpose: This study aimed to elucidate the characteristics of varus knee deformities in the Japanese population, prevalence of various around knee osteotomy procedures and influence of femoral and tibial bowing. Methods: Varus knee deformity was defined as a weight‐bearing line ratio of <50%. A total of 1010 varus knees were selected from 1814 varus knees with weight‐bearing full‐length radiographs, obtained at two facilities, based on exclusion criteria. Various parameters were measured, and around knee osteotomy simulations based on the deformity centre were conducted using digital planning tools. Bowing of the femoral and tibial shafts was measured, with bowing defined as follows: ≤ −0.6° indicating lateral bowing and ≥ 0.6° indicating medial bowing. Statistical analysis was performed to investigate age‐related correlations and their impact on surgical techniques. Results: The study revealed that the proximal tibia was the centre of deformity in Japanese varus knees (42.8%), and high tibial osteotomy was frequently indicated (81.6%). Age demonstrated a mild correlation with femoral shaft bowing (r = −0.29), leading to an increase in the mechanical lateral distal femoral angle and to a decrease in the hip–knee–ankle angle and weight‐bearing line ratio (r = −0.29, 0.221, 0.219). The tibial shaft bowing was unaffected by age (r = −0.022). Conclusion: A significant proportion of Japanese individuals with varus knees exhibit a deformity centre located in the proximal tibia, making them suitable candidates for high tibial osteotomy. No age‐related alterations were discerned in tibial morphology, indicating that the occurrence of constitutional varus knees is attributable to tibial deformities in the Japanese patient cohort. Level of Evidence: Level IV. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Intraoperative Fracture during the Insertion of Advanced Locking Screws (T2 Alpha Femur Retrograde Intramedullary Nailing System): Report of Two Cases and Identifying Causes and Prevention.

Author

Higuchi, Takashi, Taninaka, Atsushi, Yoshimizu, Rikuto, Hayashi, Katsuhiro, Miwa, Shinji, Yamamoto, Norio, Tsuchiya, Hiroyuki, and Demura, Satoru

Subjects
INTRAMEDULLARY fracture fixation, INTRAMEDULLARY rods, SCREWS, FEMUR, FEMORAL fractures, PERIPROSTHETIC fractures, ELBOW fractures
Abstract

Background: Recently, the T2 alpha nailing system (Stryker, Inc.), which has advanced locking screws that can attach a screw to a rod, has been used worldwide and is expected to improve fracture fixation. We analyzed two cases of supracondylar femoral fractures in older adult patients, in which intraoperative fractures occurred during the insertion of advanced locking screws of the T2 alpha femur retrograde intramedullary nail. Case presentation: A 93-year-old and an 82-year-old woman each underwent T2 alpha femur retrograde nail fixation for supracondylar femur fractures at separate hospitals, and advanced locking screws were used as the proximal transverse locking screws. In both patients, a fracture line was observed at the proximal screw postoperatively, and the fractures were refixed with distal cable wiring and/or femoral distal plates. The patients were subsequently discharged from the same facility with no remarkable pain. Conclusions: When inserting advanced locking screws, it is necessary to enlarge the screw hole in the near-bone cortex with a counterbore drill, which might add torque to the bone cortex that could result in fractures. If the sleeve is distant from the bone, the counterbore drill will not reach the bone, the screw hole will not expand, and the insertion of advanced locking screws will apply a strong torque to the bone cortex and may result in fracture. Moreover, it is important to confirm that the counterbore drill is securely inserted under fluoroscopy and to carefully enlarge the bony foramen manually to prevent fractures during screw insertion. [ABSTRACT FROM AUTHOR]

Published
2024
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31. Surgical Site Infection following Primary Definitive Fusion for Pediatric Spinal Deformity: A Multicenter Study of Rates, Risk Factors, and Pathogens

Author

Watanabe, Kei, Yamaguchi, Toru, Suzuki, Satoshi, Suzuki, Teppei, Nakayama, Keita, Demura, Satoru, Taniguchi, Yuki, Yamamoto, Takuya, Sugawara, Ryo, Sato, Tatsuya, Fujiwara, Kenta, Murakami, Hideki, Akazawa, Tsutomu, Kakutani, Kenichiro, Hirano, Toru, Yanagida, Haruhisa, Watanabe, Kota, Matsumoto, Morio, Uno, Koki, Kotani, Toshiaki, Takeshita, Katsushi, Ohara, Tetsuya, and Kawakami, Noriaki

Published
2021
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32. Risk Factor for Poor Patient Satisfaction After Lumbar Spine Surgery in Elderly Patients Aged Over 80 years

Author

Hikata, Tomohiro, Ishii, Ken, Matsumoto, Morio, Kobayashi, Kazuyoshi, Imagama, Shiro, Ando, Kei, Ishiguro, Naoki, Yamashita, Masaomi, Seki, Shoji, Terai, Hidetomi, Suzuki, Akinobu, Tamai, Koji, Aramomi, Masaaki, Ishikawa, Tetsuhiro, Kimura, Atsushi, Inoue, Hirokazu, Inoue, Gen, Miyagi, Masayuki, Saito, Wataru, Yamada, Kei, Hongo, Michio, Endo, Kenji, Suzuki, Hidekazu, Nakano, Atsushi, Watanabe, Kazuyuki, Ohya, Junichi, Chikuda, Hirotaka, Aoki, Yasuchika, Shimizu, Masayuki, Futatsugi, Toshimasa, Mukaiyama, Keijiro, Hasegawa, Masaichi, Kiyasu, Katsuhito, Iizuka, Haku, Kobayashi, Ryoichi, Iizuka, Yoichi, Nishida, Kotaro, Kakutani, Kenichiro, Nakajima, Hideaki, Murakami, Hideki, Demura, Satoru, Kato, Satoshi, Yoshioka, Katsuhito, Namikawa, Takashi, Watanabe, Kei, Nakanishi, Kazuyoshi, Nakagawa, Yukihiro, Yoshimoto, Mitsunori, Fujiwara, Hiroyasu, Nishida, Norihiro, Imajo, Yasuaki, Yamazaki, Masashi, Abe, Tetsuya, Fujii, Kengo, Kaito, Takashi, Eguchi, Yawara, Furuya, Takeo, Orita, Sumihisa, and Ohtori, Seiji

Published
2020
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34. Pathology, Diagnosis, and Management of Sarcoma.

Author

Miwa, Shinji, Hayashi, Katsuhiro, and Demura, Satoru

Subjects
PATHOLOGY, DIAGNOSIS, SARCOMA, EWING'S sarcoma, SOFT tissue tumors, CHALCONE
Abstract

This document is an editorial from the International Journal of Molecular Sciences titled "Pathology, Diagnosis, and Management of Sarcoma." The editorial discusses the challenges in investigating sarcoma due to its rarity and heterogeneity. It highlights recent advancements in understanding the molecular pathogenesis of sarcomas, including molecular genetic techniques and immunohistochemical markers. The editorial also presents research on specific types of sarcomas, such as osteosarcoma and Ewing's sarcoma, and explores potential therapeutic approaches for soft tissue sarcomas. Additionally, it discusses targeted protein degradation as a promising pharmacological modality for sarcoma treatment. Overall, the editorial provides valuable insights into the current understanding and management of sarcomas. [Extracted from the article]

Published
2024
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39. Evidence of causality of low body mass index on risk of adolescent idiopathic scoliosis: a Mendelian randomization study

Author

Otomo, Nao, primary, Khanshour, Anas M., additional, Koido, Masaru, additional, Takeda, Kazuki, additional, Momozawa, Yukihide, additional, Kubo, Michiaki, additional, Kamatani, Yoichiro, additional, Herring, John A., additional, Ogura, Yoji, additional, Takahashi, Yohei, additional, Minami, Shohei, additional, Uno, Koki, additional, Kawakami, Noriaki, additional, Ito, Manabu, additional, Sato, Tatsuya, additional, Watanabe, Kei, additional, Kaito, Takashi, additional, Yanagida, Haruhisa, additional, Taneichi, Hiroshi, additional, Harimaya, Katsumi, additional, Taniguchi, Yuki, additional, Shigematsu, Hideki, additional, Iida, Takahiro, additional, Demura, Satoru, additional, Sugawara, Ryo, additional, Fujita, Nobuyuki, additional, Yagi, Mitsuru, additional, Okada, Eijiro, additional, Hosogane, Naobumi, additional, Kono, Katsuki, additional, Nakamura, Masaya, additional, Chiba, Kazuhiro, additional, Kotani, Toshiaki, additional, Sakuma, Tsuyoshi, additional, Akazawa, Tsutomu, additional, Suzuki, Teppei, additional, Nishida, Kotaro, additional, Kakutani, Kenichiro, additional, Tsuji, Taichi, additional, Sudo, Hideki, additional, Iwata, Akira, additional, Inami, Satoshi, additional, Wise, Carol A., additional, Kochi, Yuta, additional, Matsumoto, Morio, additional, Ikegawa, Shiro, additional, Watanabe, Kota, additional, and Terao, Chikashi, additional

Published
2023
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42. Novel predictors of immune checkpoint inhibitor response and prognosis in advanced non‐small‐cell lung cancer with bone metastasis

Author

Asano, Yohei, primary, Yamamoto, Norio, additional, Demura, Satoru, additional, Hayashi, Katsuhiro, additional, Takeuchi, Akihiko, additional, Kato, Satoshi, additional, Miwa, Shinji, additional, Igarashi, Kentaro, additional, Higuchi, Takashi, additional, Taniguchi, Yuta, additional, Morinaga, Sei, additional, Sone, Takashi, additional, Okuda, Miho, additional, Matsumoto, Isao, additional, Yano, Seiji, additional, and Tsuchiya, Hiroyuki, additional

Published
2023
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44. Short fusion with vertebrectomy during growth in congenital spinal deformity: is early surgical intervention recommended?

Author

Matsumoto, Hiroko, Kawakami, Noriaki, Saito, Toshiyuki, Uno, Koki, Suzuki, Teppei, Watanabe, Kota, Matsumoto, Morio, Yamaguchi, Toru, Yanagida, Haruhisa, Kotani, Toshiaki, Demura, Satoru, Takeshita, Katsushi, and Taniguchi, Yuki

Abstract

Study design: This was a multi-center retrospective cohort study included consecutive pediatric patients who were admitted to 8 institutions for the treatment of congenital spinal deformity from 1991 to 2012. Objective: The purpose of this study was to compare curve corrections and balances, reoperations, and complications at 2-year follow-up between those treated early vs. late. Summary of background data: Although early intervention has been recommended, no empirical study has examined the optimal timing of short fusion among patients with congenital spinal deformity. Methods: Patients with congenital spinal deformity with formation failure undergoing vertebrectomy with short fusion (≤ 6 fusion segments) were categorized as early (surgery at ≤ 6 years) and late (7–18 years) fusion. Outcomes included coronal and sagittal curve corrections at immediate and 2-year evaluations; loss of curve correction from immediate to 2-year follow-up; coronal and sagittal balance at 2 years; and inter-operative, major and minor short-term postoperative, and long-term postoperative complications and reoperations. Results: Early fusion (N= 79) compared to late fusion (N= 96) was associated with greater percent curve correction at immediate (71% vs. 60%, p= 0.0046) and 2-year (63% vs. 52%, p= 0.0153) evaluations adjusting for surgeon experience and preoperative coronal balance. These associations were significant for males and those with 3-level fusions but not 4 to 6-level fusions. Early fusion compared with late fusion had more intraoperative (6% vs. 1%) and postoperative long-term complications (27% vs. 18%), as well as unplanned reoperations (13% vs. 9%). Early vs. late fusion had fewer short-term complications, both major (6% vs. 15%) and minor (6% vs. 15%). Conclusions: Patients who underwent early treatment achieved larger major curve correction by 10% compared to patients with late treatment when assessed at 2-year postoperative evaluation. However, early fusion should be considered with careful attention to possible increased risk of reoperations. Level of evidence: Level III.

Published
2024
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