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1,218 results on '"Kurosaka M"'

7. Rotatory Knee Laxity Exists on a Continuum in Anterior Cruciate Ligament Injury

Author

Lian, J., Diermeier, T., Meghpara, M., Popchak, A., Smith, C. N., Kuroda, R., Zaffagnini, S., Samuelsson, K., Karlsson, J., Irrgang, J. J., Musahl, V., Sheean, A. J., Burnham, J. M., Jayson, L., Clair, S., Adam, P., Elmar, H., Pfeiffer, T. R., Araujo, P., Oostdyk, A., Guenther, D., Ohashi, B., F. H., Fu, Nagamune, K., Kurosaka, M., Hoshino, Y., Grassi, A., Muccioli, G. M. M., Lopomo, N., Signorelli, C., Raggi, F., Horvath, A., Svantesson, E., Senorski, E. H., Sundemo, D., Bjoernsson, H., Ahlden, M., Desai, N., Lian Jayson , Diermeier Theresa , Meghpara Mitchell , Popchak Adam, Smith Clair N., Kuroda Ryosuke, Zaffagnini Stefano, Samuelsson Kristian, Karlsson Jón, Irrgang James, and Musahl Volker

Subjects
Adult, Joint Instability, Male, medicine.medical_specialty, Adolescent, Knee Joint, Post hoc, Anterior cruciate ligament, Knee Injuries, Young Adult, 03 medical and health sciences, 0302 clinical medicine, Knee compartment, medicine, Humans, Orthopedics and Sports Medicine, In patient, Prospective Studies, Treatment Failure, Range of Motion, Articular, ACL instabilitym rotatory laxity, Analysis of Variance, 030222 orthopedics, Anterior Cruciate Ligament Reconstruction, business.industry, Anterior Cruciate Ligament Injuries, musculoskeletal, neural, and ocular physiology, Significant difference, 030229 sport sciences, General Medicine, Middle Aged, musculoskeletal system, Surgery, surgical procedures, operative, medicine.anatomical_structure, Multicenter study, Knee laxity, Tears, Female, business, human activities
Abstract

Background: The purpose of this investigation was to compare the magnitude of rotatory knee laxity in patients with a partial anterior cruciate ligament (ACL) tear, those with a complete ACL tear, and those who had undergone a failed ACL reconstruction. It was hypothesized that rotatory knee laxity would increase with increasing injury grade, with knees with partial ACL tears demonstrating the lowest rotatory laxity and knees that had undergone failed ACL reconstruction demonstrating the highest rotatory laxity. Methods: A prospective multicenter study cohort of 354 patients who had undergone ACL reconstruction between 2012 and 2018 was examined. All patients had both injured and contralateral healthy knees evaluated using standardized, preoperative quantitative pivot shift testing, determined by a validated, image-based tablet software application and a surface-mounted accelerometer. Quantitative pivot shift was compared with the contralateral healthy knee in 20 patients with partial ACL tears, 257 patients with complete ACL tears, and 27 patients who had undergone a failed ACL reconstruction. Comparisons were made using 1-way analysis of variance (ANOVA) with post hoc 2-sample t tests with Bonferroni correction. Significance was set at p < 0.05. Results: There were stepwise increases in side-to-side differences in quantitative pivot shift in terms of lateral knee compartment translation for patients with partial ACL tears (mean [and standard deviation], 1.4 ± 1.5 mm), those with complete ACL tears (2.5 ± 2.1 mm), and those who had undergone failed ACL reconstruction (3.3 ± 1.9 mm) (p = 0.01) and increases in terms of lateral compartment acceleration for patients with partial ACL tears (0.7 ± 1.4 m/s2), those with complete ACL tears (2.3 ± 3.1 m/s2), and those who had undergone failed ACL reconstruction (2.4 ± 5.5 m/s2) (p = 0.01). A significant difference in lateral knee compartment translation was found when comparing patients with partial ACL tears and those with complete ACL tears (1.2 ± 2.1 mm [95% confidence interval (CI), 0.2 to 2.1 mm]; p = 0.02) and patients with partial ACL tears and those who had undergone failed ACL reconstruction (1.9 ± 1.7 mm [95% CI, 0.8 to 2.9 mm]; p = 0.001), but not when comparing patients with complete ACL tears and those who had undergone failed ACL reconstruction (0.8 ± 2.1 [95% CI, −0.1 to 1.6 mm]; p = 0.09). Increased lateral compartment acceleration was found when comparing patients with partial ACL tears and those with complete ACL tears (1.5 ± 3.0 m/s2 [95% CI, 0.8 to 2.3 m/s2]; p = 0.0002), but not when comparing patients with complete ACL tears and those who had undergone failed ACL reconstruction (0.1 ± 3.4 m/s2 [95% CI, −2.2 to 2.4 m/s2]; p = 0.93) or patients with partial ACL tears and those who had undergone failed ACL reconstruction (1.7 ± 4.2 m/s2 [95% CI, −0.7 to 4.0 m/s2]; p = 0.16). An increasing lateral compartment translation of the contralateral, ACL-healthy knee was found in patients with partial ACL tears (0.8 mm), those with complete ACL tears (1.2 mm), and those who had undergone failed ACL reconstruction (1.7 mm) (p < 0.05). Conclusions: A progressive increase in rotatory knee laxity, defined by side-to-side differences in quantitative pivot shift, was observed in patients with partial ACL tears, those with complete ACL tears, and those who had undergone failed ACL reconstruction. These results may be helpful when assessing outcomes and considering indications for the management of high-grade rotatory knee laxity. Level of Evidence: Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Published
2019

29. Shaping of delta-wing planform to suppress vortex breakdown

Author

Srigrarom, S. and Kurosaka, M.

Subjects
Airplanes -- Wings, Vortex-motion -- Research, Wakes (Aerodynamics) -- Research, Aerospace and defense industries, Business
Abstract

A theory of the cause of vortex breakdown in advanced military aircraft based on a self-induction mechanism is presented. Four steps in the self-inductive scenario are detailed. Design strategies for suppressing breakdown are included.

Published
2000

43. Anchorage on fibronectin via VLA-5 ([alpha]5[beta]1 integrin) protects rheumatoid synovial cells from Fas-induced apoptosis

Author

Kitagawa, A., Miura, Y., Saura, R., Mitani, M., Ishikawa, H., Hashiramoto, A., Yoshiya, S., Shiozawa, S., and Kurosaka, M.

Subjects
Fibronectins -- Analysis, Ganglion -- Analysis, Integrins -- Analysis, Rheumatoid arthritis -- Development and progression, Rheumatoid arthritis -- Research, Apoptosis -- Physiological aspects, Apoptosis -- Research, Health
Published
2006

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