Takuji Matsumoto

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A retrospective study of the surgical results of 98 patients with syringomyelia was carried out. As primary surgical management, 38 cases were treated by craniovertebral decompression, 28 cases by craniovertebral decompression with syringotomy, and 22 cases in which Gardner's operation was performed. Primary syringoperitoneal shunt was done on six patients(More)
Experimental animal models of disc degeneration have been used to assess the biomechanical behavior, biochemical composition, and biological changes in the intervertebral discs. The objective of our study was to evaluate the anabolic and anti-catabolic effects of intradiscal injection of Osteogenic Protein-1 (OP-1) by histology and immunohistochemistry in(More)
We studied whether applying nucleus pulposus tissue, obtained from tail intervertebral discs that had been subjected to chronic mechanical compression, to the lumbar nerve roots produces hyperalgesia, which is thought to be a pain-related behavior in the rat. An Ilizarov-type apparatus was used for immobilization and chronically applied compression of the(More)
Surgical site infection (SSI) after spinal surgery is a devastating complication. Various methods of skin closure are used in spinal surgery, but the optimal skin-closure method remains unclear. A recent report recommended against the use of metal staples for skin closure in orthopedic surgery. 2-Octyl-cyanoacrylate (Dermabond; Ethicon, NJ, USA) has been(More)
Sixty-seven patients with cervical spondylotic myelopathy treated with expansive laminoplasty were retrospectively reviewed at a minimum 2-year follow-up. This study was designed to evaluate whether preoperative instability influences the clinical outcome in patients with cervical spondylotic myelopathy treated with laminoplasty without spinal fusion.(More)
Japan has a long history of Public-Private Partnerships (PPPs); however, it has experienced many failures but learned various lessons from them. The representative example is a management failure of the third sector, which is a joint corporation capitalized by both the public and private sectors. In fact, many of the third sectors were successively(More)
Severe cerebral ischaemia has been repeatedly shown to provoke a massive increase in striatal extracellular dopamine (DA). These experiments were undertaken to determine the duration of the DA increase produced by transient ischaemia, and the fate of the released DA during recirculation. Experiments were performed in anaesthetised rats subjected to 20 min(More)
STUDY DESIGN To study the therapeutic efficacy of intradiscal injection of osteogenic protein-1 (OP-1) to reduce degeneration and associated discogenic pain. OBJECTIVE To evaluate if intradiscal injection of OP-1 can reverse disc degeneration and reduce hyperalgesia, a pain-related behavior. SUMMARY OF BACKGROUND DATA We showed that induction of(More)
1. The aim of this study was to examine the rapid changes in extracellular hydrogen ion activity [( H+]o or pHo) which are associated with depolarization and repolarization subsequent to cerebral ischemia reperfusion. Two parallel studies were performed with different rat models of ischemia: repetitive severe ischemia produced in anesthetized animals by(More)
The effects of 20-min transient, global, forebrain ischaemia and cardiac arrest on extracellular concentrations of dopamine (DA), serotonin (5-HT), and their respective metabolites, homovanillic acid (HVA) and 5-hydroxyindoleacetic acid (5-HIAA), were measured in vivo by dialysis of rat striatum and hippocampus. During the ischaemic period, striatal DA(More)