• Korean Journal of Computational Design and Engineering
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• v.17 no.6
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• pp.436-442
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• 2012

Traumatic loading during car accidents or sports activities can lead to cervical spinal cord injury. Experiments in spinal cord injury research are mainly carried out on rabbit or rat. Finite element models that include the rat cervical spinal cord and adjacent soft tissues should be developed for efficient studies of mechanisms of spinal cord injury. Images of a rat were obtained from high resolution MRI scanner. Polygonal surfaces were extracted structure by structure from the MRI data using the ITK-SNAP volume segmentation software. These surfaces were converted to Non-uniform Rational B-spline surfaces by the INUS Rapidform rapid prototyping software. Rapidform was also used to generate a thin shell surface model for the dura mater which sheathes the spinal cord. Altair's Hypermesh pre-processor was used to generate finite element meshes for each structure. These processes in this study can be utilized in modeling of other biomedical tissues and can be one of examples for reverse engineering on biomechanics.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.2 s.173
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• pp.403-410
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• 2000

The effects of various factors were studied on the process of a steel cord by twisting wires. To remove residual twisting moment after the steel cord process, the twisting angles of residual elasti c twisting and overtwisting were measured and compared with finite element results. The agreement between experimental data and finite element calculations was good for the angles of residual elastic twisting and over-twisting. The stress distributions in a steel cord under complex loading conditions were also obtained by using the finite element analysis.

• Journal of Korean Neurosurgical Society
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• v.58 no.3
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• pp.294-297
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• 2015

Spinal cord herniation is a rare condition that has become increasingly recognised in the last few years. The authors report a case of idiopathic spinal cord herniation in a 33 year old woman performed with progressive Brown-Sequard syndrome. The diagnosis was made on MR imaging. After repairing the herniation, the patient made a gradual improvement. Potential causes are discussed, including a possible role of dural defect. In conclusion, idiopathic spinal cord herniation is a potentially treatable condition that should be more readily diagnosed that increasing awareness and improved imaging techniques.

• Journal of Korean Neurosurgical Society
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• v.63 no.3
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• pp.314-320
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• 2020

Retained medullary cord (RMC) is a relatively recent term. Pang et al. newly defined the RMC as a late arrest of secondary neurulation leaving a non-functional vestigial portion at the tip of the conus medullaris. RMC, which belongs to the category of closed spinal dysraphism, is a cord-like structure that is elongated from the conus toward the cul-de-sac. Because intraoperative electrophysiological confirmation of a non-functional conus is essential for the diagnosis of RMC, only a tentative or an assumptive diagnosis is possible before surgery or in cases of limited surgical exposure. We suggest the term 'possible RMC' for these cases. An RMC may cause tethered cord syndrome and thus requires surgery. This article reviews the literature to elucidate the pathoembryogenesis, clinical significance and treatment of RMCs.

• The Korean Journal of Pain
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• v.19 no.1
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• pp.123-126
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• 2006

Spinal cord stimulation (SCS) has been used since 1967 for refractory chronic pain. SCS has recently undergone a variety of technical modifications and advances, and it has been applied in a variety of pain conditions. SCS has been most commonly applied for those patients with chronic back and leg pain and failed back surgery syndrome (FBSS). The clinical hallmark of FBSS is chronic postoperative pain. The pain pattern varies and the pain may show an axial or radicular distribution. Chronic intractable pain after FBSS is difficult to treat. This report describes our experience with treating chronic pain in two patients who suffered from FBSS with a spinal cord stimulator. A permanent spinal cord stimulator was implanted after a successful trial of stimulation with temporarily implanted electrodes. After 5 months of follow-up, the two patients had satisfactory improvement of their pain.

• Journal of Korean Neurosurgical Society
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• v.41 no.1
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• pp.57-60
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• 2007

The incidence of diastematomyelia associated with teratoma is extremely rare. We present a case of sacrococcygeal teratoma in a neonate with split spinal cord malformation[SSCM]. Magnetic resonance imaging[MRI] showed a heterogenous mass lesion with cyst in the sacrococcygeal region and multiple spinal anormalies [diastematomyelia, tethered cord, hydromyelia, and hemivertebrae]. The mature teratoma was confirmed on histopathological examination. In SSCMs, the potential for coexisting congenital anomalies at separate levels of the spinal cord must be considered in radiological investigations.

• Journal of Korean Neurosurgical Society
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• v.39 no.5
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• pp.385-388
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• 2006

An Intramedullary subependymoma of the spinal cord is a rare tumor with only 43 reported cases in the literature. Most of them are reported to be localized within the cervical spinal cord. We report a rare case of a thoracic spine intramedullary subependymoma in a 37-year-old female who presented with back pain and radiating leg pain. Subtotal resection and post-operative radiotherapy were performed. Subependymomas developing in the spinal cord are benign with a low proliferative potential. Complete resection of the tumor appears to be the optimal method for a complete cure. However aggressive surgery may cause severe neurological deficit. Therefore, if severe neurological deficits are expected after complete removal, a partial removal and postoperative radiation therapy is an alternative method for treatment in selected cases. A large-scale randomized study is mandatory to clarify the effectiveness of radiotherapy and to establish the recurrence rate and prognosis with respect to the surgical removal of these tumors.

• Korean Journal of Bronchoesophagology
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• v.9 no.1
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• pp.83-86
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• 2003

Background and Objectives : Paradoxical vocal cord movement is a series of paroxysmal adduction of the anterior two-thirds of the vocal cords during respiration or during phonation. The choking, stridor, and wheezing in this condition occur primarily on inhalation, rather than on exhalation. The two pathognomonic diagnostic criterias that need to be assessed during an acute presentation are laryngoscopy with direct visualization of paradoxical adduction of the vocal cords and pulmonary function testing. Materials and Methods : A retrospective review of 3 patients who were referred to otolaryngologist from pulmonology department, and were confirmed by typical laryngoscopic findings with paradoxical adduction of the vocal cords was conducted. Results The patients were misdiagnosed as exercised-induced asthma, and unresponsive to corticosteroid and bronchodilators. Improvement was achieved only by diagnosis with paradoxial vocal cord movement. Biofeed back therapy, voice therapy, treatment for reflux laryngitis improved symptoms. Conclusion The etiology of paradoxical vocal cord movement is unknown. It may be functional or emotional. The functional factors that were proposed are neurologic deficit and gastroesophageal reflux. Management methods of this condition consist of psychological counselling, voice therapy, and antireflux medication.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.19 no.2
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• pp.281-287
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• 2006

Objective : This study was designed to evaluate the effects of oriental medicine therapy on Vocal cord paralysis with Ramsay Hunt syn. Methods & Result : The clinical data was analyzed on a patient with Vocal cord paralysis with Ramsay Hunt syn. whose main symptoms were right facial palsy, auricle pain, dysphagia and hoarseness. The patient was treated by the acupucture and Herb-medicine.. As the result, symptoms are improved. Conclusion : This result suggest that the acupucture and Herb-medicine. was effective treatment of Vocal cord paralysis. So futher research is needed continuously.

• Journal of Acupuncture Research
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• v.19 no.5
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• pp.247-257
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• 2002

By process of treatment for a case which diagnosed as spinal cord injury due to spinal arterio-venous malformation and admitted from the 19th, April, 2001 to the 15th, October, 2001, the results are as follows. Methods : The treatment of patient who is diagnosed as spinal cord injury due to spinal arterio-venous malformation by walking abreast of several kinds of oriental medical treatment with rehabilitative therapy. Results : The treatment was taken to the patient upgraded Frankel scale B to D and Cord motor index 61point to 88point.