Search

Your search keyword '"Ninomiya, Koshi"' showing total 35 results
Start Over Author "Ninomiya, Koshi"
35 results on '"Ninomiya, Koshi"'

14. Isthmus‐guided Cortical Bone Trajectory Reduces Postoperative Increases in Serum Creatinine Phosphokinase Concentrations

Author

Ohkawa, Toshika, Iwatsuki, Koichi, Ohnishi, Yu‐ichiro, Ninomiya, Koshi, and Yoshimine, Toshiki

Subjects
musculoskeletal diseases, Adult, Aged, 80 and over, Male, Lumbar Vertebrae, Bone Screws, Middle Aged, Postoperative Hemorrhage, Spinal Fusion, Treatment Outcome, Clinical Articles, Humans, Equipment Failure, Female, Spondylolisthesis, Tomography, X-Ray Computed, Creatine Kinase, Biomarkers, Aged, Retrospective Studies
Abstract

OBJECTIVE: This study aimed to determine whether an isthmus‐guided cortical bone trajectory (CBT) technique provides better clinical outcomes than the original cortical bone trajectory CBT technique for screw fixation. METHODS: A consecutive series of 21 patients with lumbar spondylolisthesis who had undergone CBT screw fixation using the original technique from June 2012 to February 2013 and 33 who had undergone the isthmus‐guided technique from March 2013 to August 2014 was retrospectively reviewed. The number of screws inserted, interbody fusion and screw misplacements, amount of blood loss, and creatinine phosphokinase (CPK) ratios (postoperative day 1 CPK/preoperative CPK) were reviewed to evaluate clinical outcomes and compared between the original and isthmus‐guided CBT techniques. RESULTS: Postoperative serum CPK concentrations were significantly lower with the isthmus‐guided than the original CBT technique (P < 0.05). There were no significant differences in age, blood loss, or number of screws, vertebral interbody fusions and patients with history of previous decompression surgery at the same level. There was a trend to higher incidence of screw misplacement with the original than the isthmus‐guided CBT technique; this difference was not significant (P = 0.53). There were no major intraoperative complications. In all the CBT procedures performed in our institution, almost half (47%) the screw misplacements have occurred at the level of L (5), and most on the right side. CONCLUSIONS: Right‐handed operators should take care inserting screws on the right side. From the viewpoint of screw misplacement, isthmus‐guided CBT provides superior or equivalent safety to the original CBT technique.

Published
2015

15. Adjacent Lumbar Disc Herniation after Lumbar Short Spinal Fusion

Author

Ninomiya, Koshi, Iwatsuki, Koichi, Ohnishi, Yu-ichiro, Ohkawa, Toshika, and Yoshimine, Toshiki

Subjects
Article Subject
Abstract

A 70-year-old outpatient presented with a chief complaint of sudden left leg motor weakness and sensory disturbance. He had undergone L4/5 posterior interbody fusion with L3–5 posterior fusions for spondylolisthesis 3 years prior, and the screws were removed 1 year later. He has been followed up for 3 years, and there had been no adjacent segment problems before this presentation. Lumbar magnetic resonance imaging (MRI) showed a large L2/3 disc hernia descending to the L3/4 level. Compared to the initial MRI, this hernia occurred in an “intact” disc among multilevel severely degenerated discs. Right leg paresis and bladder dysfunction appeared a few days after admission. Microscopic lumbar disc herniotomy was performed. The right leg motor weakness improved just after the operation, but the moderate left leg motor weakness and difficulty in urination persisted.

Published
2014
Full Text
View/download PDF

16. Motor evoked potential and voluntary EMG activity after olfactory mucosal autograft transplantation in a case of chronic, complete spinal cord injury: case report

Author

Iwatsuki, Koichi, primary, Tajima, Fumihiro, additional, Sankai, Yoshiyuki, additional, Ohnishi, Yu-ichiro, additional, Nakamura, Takeshi, additional, Ishihara, Masahiro, additional, Hosomi, Koichi, additional, Ninomiya, Koshi, additional, Moriwaki, Takashi, additional, and Yoshimine, Toshiki, additional

Published
2016
Full Text
View/download PDF

34. Communicating hydrocephalus after resection of a meningioma ventral to the foramen magnum.

Author

Taki K, Ninomiya K, Yamamoto A, Suematsu T, Sasaki M, and Kishima H

Abstract

Background: Tumors in or near the foramen magnum may cause communicating or non-communicating hydrocephalus (HC), depending on their size and location. Here, an 81-year-old female developed communicating HC following the resection of a meningioma ventral to the foramen magnum., Case Description: An 81-year-old female presented with numbness in the left neck and left hemiparesis. The magnetic resonance revealed an 18-mm tumor ventral to the foramen magnum that significantly enlarged over the past 6 months. She underwent total tumor resection but then presented with progressive HC both clinically (i.e., instability of gait with confusion) and radiographically (computed tomography). Following placement of a lumboperitoneal (LP) shunt, symptoms markedly improved. Further, the cerebrospinal fluid (CSF) analysis showed elevated cell counts and protein concentrations, indicating likely "leakage" of intratumoral contents postoperatively contributing to the progressive HC., Conclusion: Patients presenting with acute meningiomas ventral to the foramen magnum may develop postoperative communicating HC attributed to tumor-related CSF leakage of necrotic intratumoral components that can be successfully treated with a LP shunt., Competing Interests: There are no conflicts of interest., (Copyright: © 2024 Surgical Neurology International.)

Published
2024
Full Text
View/download PDF

35. Significance of the Pars Interarticularis in the Cortical Bone Trajectory Screw Technique: An In Vivo Insertional Torque Study.

Author

Ninomiya K, Iwatsuki K, Ohnishi YI, Ohkawa T, and Yoshimine T

Abstract

Study Design: Retrospective study., Purpose: Cortical bone trajectory (CBT), a more medial-to-lateral and shorter path than the traditional one for spinal fusion, is thought to be effective for severely degenerated vertebrae because screws are primarily stabilized at the posterior elements. We evaluated the efficacy of this approach through in vivo insertional torque measurement., Overview of Literature: There has been only one prior in vivo study on CBT insertional torque., Methods: Between January 2013 and April 2014, a total of 22 patients underwent posterior lumbar fusion using the CBT technique. The maximum insertional torque, which covers the radial strength needed for insertion, was measured for 113 screws, 8 of which were inserted for L5 spondylolysis. The insertional torque for cases with (n=8) and without (n=31) spondylolysis of L5 were compared using one-way analysis of variance (ANOVA). To evaluate vertebral degeneration, we classified 53 vertebrae without spondylolysis by lumbar radiography using semiquantitative methods; the insertional torque for the 105 screws used was compared on the basis of this classification. Additionally, differences in insertional torque among cases grouped by age, sex, and lumbar level were evaluated for these 105 screws using ANOVA and the Tukey test., Results: The mean insertional torque was significantly lower for patients with spondylolysis than for those without spondylolysis (4.25 vs. 8.24 in-lb). There were no statistical differences in insertional torque according to vertebral grading or level. The only significant difference in insertional torque between age and sex groups was in men <75 years and women ≥75 years (10 vs. 5.5 in-lb)., Conclusions: Although CBT should be used with great caution in patient with lysis who are ≥75 years, it is well suited for dealing with severely degenerated vertebrae because the pars interarticularis plays a very important role in the implementation of this technique., Competing Interests: No potential conflict of interest relevant to this article was reported.

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results