The Experts below are selected from a list of 2049 Experts worldwide ranked by ideXlab platform
Hirohiko Kakizaki - One of the best experts on this subject based on the ideXlab platform.
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changes in horizontal strabismus after Inferior Rectus Muscle recession with or without nasal transposition in thyroid eye disease a retrospective observational study
PLOS ONE, 2020Co-Authors: Aric Vaidya, Hirohiko Kakizaki, Yasuhiro TakahashiAbstract:Since the Inferior Rectus Muscle (IRM) is a secondary adductor, it is expected to commonly observe esotropia in thyroid-associated Inferior Rectus myopathy, but this can be improved after the IRM recession. However, variable outcomes regarding the changes in horizontal strabismus after IRM recession ± IRM nasal transposition have been encountered in patients with thyroid eye disease (TED). We, therefore, examined the changes in 62 patients with TED in this retrospective, observational, comparative study. The patients were classified into 3 groups based on the results of postoperative changes in horizontal strabismus: Groups A (reduced esotropia), B (unchanged esotropia), and C (increased esotropia). Consequently, Groups A, B, and C included 23 (38.7%), 11 (17.7%), and 27 (43.5%) patients, respectively. In the multivariate linear regression analysis, the angle of preoperative esotropia (P < 0.001) and the amount of IRM nasal transposition (P = 0.049) were significant predictors of postoperative changes in horizontal strabismus. The results of our study will be helpful to ophthalmologists for formulating an effective preoperative surgical plan.
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correction of excyclotropia by surgery on the Inferior Rectus Muscle in patients with thyroid eye disease a retrospective observational study
PLOS ONE, 2016Co-Authors: Yasuhiro Takahashi, Yoshiyuki Kitaguchi, Shunsuke Nakakura, Hidenori Mito, Akiko Kimura, Hirohiko KakizakiAbstract:Purpose To examine the characteristics of excyclotropia correction through surgery on the Inferior Rectus Muscle in patients with thyroid eye disease. Methods This was a retrospective, observational study at a single institution. We reviewed 36 patients who had undergone unilateral Inferior Rectus Muscle recession, with or without nasal Inferior Rectus Muscle transposition. The following factors were investigated as possibly influencing excyclotropia correction: Inferior Rectus Muscle thickness, degree of adipose change in the Inferior Rectus Muscle, smoking status, history of orbital radiotherapy, and the amount of Inferior Rectus Muscle recession. Using T1-weighted coronal magnetic resonance imaging, we measured the cross-sectional area of the Inferior Rectus Muscle at its largest point, as well as the bright-signal area of the Inferior Rectus Muscle, which reflects intermuscular adipose change. We then calculated the percentage internal bright-signal area at the point of the largest Inferior Rectus Muscle cross-sectional area. The history of orbital radiotherapy was graded using a binary system. We evaluated correlations among excyclotropia correction, the amount of nasal Inferior Rectus Muscle transposition, and the possible influencing factors listed, using stepwise multiple regression analyses. Results The multiple regression model demonstrated a significant relationship among excyclotropia correction, amount of nasal Inferior Rectus Muscle transposition, and the amount of Inferior Rectus Muscle recession (YCORRECTION = 8.546XTENDON WIDTH + 0.405XRECESSION− 0.908; r = 0.844; adjusted r2 = 0.695; P < 0.001). Conclusions Excyclotropia correction was correlated with the amount of nasal Inferior Rectus Muscle transposition and the amount of Inferior Rectus Muscle recession, but not with the other factors. The regression model presented in this study will enable us to determine more precisely the amount of nasal Inferior Rectus Muscle transposition in patients with excyclotropia of various angles.
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predictors of the dose effect relationship regarding unilateral Inferior Rectus Muscle recession in patients with thyroid eye disease
International Journal of Endocrinology, 2015Co-Authors: Yasuhiro Takahashi, Hirohiko KakizakiAbstract:Purpose. To evaluate whether Inferior Rectus Muscle (IRM) thickness, the degree of adipose change in the IRM, smoking status, and the previous history of orbital radiotherapy can predict the dose-effect relationship regarding unilateral IRM recession in thyroid eye disease (TED). Methods. Twenty-five patients were retrospectively reviewed. We calculated the largest IRM cross-sectional area and evaluated the degree of adipose change in the IRM using magnetic resonance imaging. The degree of adipose change and smoking status were classified using grading scales (0–3); previous orbital radiotherapy was graded as 0 when a history was not available and 1 when it was available. The correlation between the dose-effect relationship and the hypothesized predictive factors was evaluated using stepwise multiple regression analysis. Results. The multiple regression model, with the exception of the history of the previous orbital radiotherapy, estimated a significant dose-effect relationship for the parameters evaluated ( = 0.013XIRM AREA − 0.222XADIPOSE − 0.102XSMOKING
Yasuhiro Takahashi - One of the best experts on this subject based on the ideXlab platform.
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changes in horizontal strabismus after Inferior Rectus Muscle recession with or without nasal transposition in thyroid eye disease a retrospective observational study
PLOS ONE, 2020Co-Authors: Aric Vaidya, Hirohiko Kakizaki, Yasuhiro TakahashiAbstract:Since the Inferior Rectus Muscle (IRM) is a secondary adductor, it is expected to commonly observe esotropia in thyroid-associated Inferior Rectus myopathy, but this can be improved after the IRM recession. However, variable outcomes regarding the changes in horizontal strabismus after IRM recession ± IRM nasal transposition have been encountered in patients with thyroid eye disease (TED). We, therefore, examined the changes in 62 patients with TED in this retrospective, observational, comparative study. The patients were classified into 3 groups based on the results of postoperative changes in horizontal strabismus: Groups A (reduced esotropia), B (unchanged esotropia), and C (increased esotropia). Consequently, Groups A, B, and C included 23 (38.7%), 11 (17.7%), and 27 (43.5%) patients, respectively. In the multivariate linear regression analysis, the angle of preoperative esotropia (P < 0.001) and the amount of IRM nasal transposition (P = 0.049) were significant predictors of postoperative changes in horizontal strabismus. The results of our study will be helpful to ophthalmologists for formulating an effective preoperative surgical plan.
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correction of excyclotropia by surgery on the Inferior Rectus Muscle in patients with thyroid eye disease a retrospective observational study
PLOS ONE, 2016Co-Authors: Yasuhiro Takahashi, Yoshiyuki Kitaguchi, Shunsuke Nakakura, Hidenori Mito, Akiko Kimura, Hirohiko KakizakiAbstract:Purpose To examine the characteristics of excyclotropia correction through surgery on the Inferior Rectus Muscle in patients with thyroid eye disease. Methods This was a retrospective, observational study at a single institution. We reviewed 36 patients who had undergone unilateral Inferior Rectus Muscle recession, with or without nasal Inferior Rectus Muscle transposition. The following factors were investigated as possibly influencing excyclotropia correction: Inferior Rectus Muscle thickness, degree of adipose change in the Inferior Rectus Muscle, smoking status, history of orbital radiotherapy, and the amount of Inferior Rectus Muscle recession. Using T1-weighted coronal magnetic resonance imaging, we measured the cross-sectional area of the Inferior Rectus Muscle at its largest point, as well as the bright-signal area of the Inferior Rectus Muscle, which reflects intermuscular adipose change. We then calculated the percentage internal bright-signal area at the point of the largest Inferior Rectus Muscle cross-sectional area. The history of orbital radiotherapy was graded using a binary system. We evaluated correlations among excyclotropia correction, the amount of nasal Inferior Rectus Muscle transposition, and the possible influencing factors listed, using stepwise multiple regression analyses. Results The multiple regression model demonstrated a significant relationship among excyclotropia correction, amount of nasal Inferior Rectus Muscle transposition, and the amount of Inferior Rectus Muscle recession (YCORRECTION = 8.546XTENDON WIDTH + 0.405XRECESSION− 0.908; r = 0.844; adjusted r2 = 0.695; P < 0.001). Conclusions Excyclotropia correction was correlated with the amount of nasal Inferior Rectus Muscle transposition and the amount of Inferior Rectus Muscle recession, but not with the other factors. The regression model presented in this study will enable us to determine more precisely the amount of nasal Inferior Rectus Muscle transposition in patients with excyclotropia of various angles.
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predictors of the dose effect relationship regarding unilateral Inferior Rectus Muscle recession in patients with thyroid eye disease
International Journal of Endocrinology, 2015Co-Authors: Yasuhiro Takahashi, Hirohiko KakizakiAbstract:Purpose. To evaluate whether Inferior Rectus Muscle (IRM) thickness, the degree of adipose change in the IRM, smoking status, and the previous history of orbital radiotherapy can predict the dose-effect relationship regarding unilateral IRM recession in thyroid eye disease (TED). Methods. Twenty-five patients were retrospectively reviewed. We calculated the largest IRM cross-sectional area and evaluated the degree of adipose change in the IRM using magnetic resonance imaging. The degree of adipose change and smoking status were classified using grading scales (0–3); previous orbital radiotherapy was graded as 0 when a history was not available and 1 when it was available. The correlation between the dose-effect relationship and the hypothesized predictive factors was evaluated using stepwise multiple regression analysis. Results. The multiple regression model, with the exception of the history of the previous orbital radiotherapy, estimated a significant dose-effect relationship for the parameters evaluated ( = 0.013XIRM AREA − 0.222XADIPOSE − 0.102XSMOKING
Mary Kansora - One of the best experts on this subject based on the ideXlab platform.
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primary infratarsal lower eyelid retractor lysis to prevent eyelid retraction after Inferior Rectus Muscle recession
American Journal of Ophthalmology, 1996Co-Authors: Dale R Meyer, John W Simon, Mary KansoraAbstract:Purpose To evaluate a procedure to prevent lower eyelid retraction, which may occur after Inferior Rectus Muscle recession surgery as a direct consequence of the intimate anatomic connections between the Inferior Rectus Muscle and lower eyelid retractors. Methods We evaluated the technique of primary infratarsal lower eyelid retractor lysis on 12 eyelids of ten patients undergoing Inferior Rectus Muscle recession of 3 mm or more. Indications for surgery included restrictive strabismus related to Graves' ophthalmopathy, orbital blowout fracture, and orbital fibrosis syndrome. Results For the 12 eyes, Inferior Rectus Muscle recession ranged from 3 to 10 mm (mean, 5.3 mm). Postoperatively there was no significant change in mean lower eyelid position (P > .82), and no patient developed Inferior scierai show. Conclusion Primary infratarsal eyelid retractor lysis is an effective technique for preventing lower eyelid retraction after Inferior Rectus Muscle recession strabismus surgery.
K D Godeiro - One of the best experts on this subject based on the ideXlab platform.
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traumatic tear of the Inferior Rectus Muscle treated with Inferior oblique anterior transposition
International Ophthalmology, 2007Co-Authors: K D Godeiro, Anderson Gustavo Teixeira Pinto, Joao Pessoa Souza Filho, Ana Maria Noriega Petrilli, Celia Regina NakanamiAbstract:Purpose To report a case of traumatic tear of the Inferior Rectus Muscle treated with Inferior oblique anterior transposition (IOAT).
Noritaka Isogai - One of the best experts on this subject based on the ideXlab platform.
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image analysis of the Inferior Rectus Muscle in orbital floor fracture using cine mode magnetic resonance imaging
Journal of Cranio-maxillofacial Surgery, 2015Co-Authors: Tadaaki Morotomi, Tomomi Iuchi, Takahiro Hashimoto, Yu Sueyoshi, Tomohisa Nagasao, Noritaka IsogaiAbstract:Abstract Purpose The main cause of diplopia induced by orbital floor fracture is strangulation or damage of the extraocular Muscles, and the outcome varies depending on the severity of trauma. In this study, we evaluated the dynamics of the eyeball and Inferior Rectus Muscle based on cine magnetic resonance (MR) images acquired before surgery. The preoperative images and outcomes were retrospectively investigated. Material and methods The subjects were 20 patients with orbital floor fracture. The patients repeated upgaze and downgaze, and images of these were acquired using cine mode magnetic resonance imaging (MRI). Image series were obtained in the sagittal direction including the eyeball and long axis of the optic nerve. The eyeball rotation angle, strangulation, and morphology of the Inferior Rectus Muscle were evaluated in each phase. Results On cine mode MRI, the outcome was poor in cases with a maximal Inferior Rectus Muscle thickness of 5 mm or greater on extension (two or more times thicker than on the healthy side). Conclusions Our results suggest that the development of sequelae can be predicted by preoperative image analysis using cine MRI, which may be beneficial to help surgeons understand the mechanism of contracture.
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association between preoperative Inferior Rectus Muscle swelling and outcomes in orbital blowout fracture
Journal of Cranio-maxillofacial Surgery, 2011Co-Authors: Kazuhide Matsunaga, Shinichi Asamura, Tadaaki Morotomi, Mitsuhiro Wada, Yoshitaka Wada, Norifumi Nakamura, Noritaka IsogaiAbstract:Abstract Purpose In 18 patients with orbital blowout fracture who underwent reconstruction using a bone autograft, the association between preoperative Inferior Rectus Muscle swelling and the outcome 1 year after the operation was evaluated. Material and methods The patients were classified according to outcomes into four groups: Group A without double vision showing normal ocular movements, Group B with double vision showing normal ocular movements, Group C with double vision showing improvement in ocular movements, and Group D with double vision showing no improvement in ocular movements. Inferior Rectus Muscle swelling was evaluated by calculating its swelling rate on the injured compared with the non-injured side on preoperative coronal CT images. Results Concerning outcomes, 12, 2, and 4 patients were classified as Groups A, B, and C, respectively, and no patient was classified as Group D. The Inferior Rectus Muscle swelling rate was ≤1.2 in Group A, and 1.6–2.4 in Groups B and C. Conclusion In patients in whom Inferior Rectus Muscle swelling on the injured is ≥1.6 times that on the non-injured side on preoperative coronal CT images, double vision and slight impairment of eye movements may remain after surgery.