Dae-Cheol Rim - Academia.edu (original) (raw)

Papers by Dae-Cheol Rim

Research paper thumbnail of Ruptured Intracranial Aneurysm in a 45-day-old Infant

Research paper thumbnail of Clinical and Radiological Comparison of Semirigid (WavefleX) and Rigid System for the Lumbar Spine

Korean Journal of Spine, 2016

Spinal fusion operation is an effective treatment in the spinal pathology, but it could change th... more Spinal fusion operation is an effective treatment in the spinal pathology, but it could change the physiological distribution of load at the instrumented and adjacent segments. This retrospective study compared the radiological and clinical outcomes of patients undergoing lumbar fusion with semirigid rods versus rigid rods system. Using transpedicular fixation and posterior lumbar interbody fusion at the level of L4/L5, 20 patients were treated with semirigid rods (WavefleX, SR group), and 20 patients with rigid rods (titanium, RR group). Clinical and radiological outcomes were evaluated, including visual analog score for lower back pain and leg pain, Prolo functional and economic scores, statues of implanted instruments, fusion rate, and complications during 24-month follow-up. Clinical scores were significantly improved until postoperative 24-month follow-up as compared with preoperative scores in both groups (p<0.05), with similar levels of improvement observed at the same tim...

Research paper thumbnail of Concurrence of Traumatic Spinal Epidural and Subdural Hematoma without Spine Injury at Occipitocervical Junction: A Cases Report

Journal of Korean Neurosurgical Society, Nov 1, 1998

Exit gevangenis? De werking van de strafuitvoeringsrechtbanken en de wet op de externe rechtsposi... more Exit gevangenis? De werking van de strafuitvoeringsrechtbanken en de wet op de externe rechtspositie van veroordeelden tot een vrijheidsstraf Sinds de zaak 'Dutroux' in 1996 is het vrij komen van gedetineerden regelmatig voorwerp van emotionele discussies in de media. De belangen van slachtoffers en gedetineerden worden vaak tegenover elkaar uitgespeeld. Punten Orde van Vlaamse Balies: 4 punten in aanvraag. IGO: goedkeuring aangevraagd

Research paper thumbnail of Usefulness of Simple Rod Rotation to Correct Curve of Adolescent Idiopathic Scoliosis

Journal of Korean Neurosurgical Society, 2015

To correct apical vertebral rotation for adolescent idiopathic scoliosis (AIS), direct vertebral ... more To correct apical vertebral rotation for adolescent idiopathic scoliosis (AIS), direct vertebral derotation (DVD) or simple rod rotation (SRR) might be considered. The aim of the present study is to introduce the surgical experiences of AIS by a Korean neurosurgeon and to evaluate the effectiveness of SRR for apical vertebral rotation. A total of 9 patients (1 male and 8 females) underwent scoliosis surgery by a neurosurgeon of our hospital. The Lenke classifications of the patients were 1 of 1B, 2 of 1C, 1 of 2A, 1 of 2C, 3 of 5C and 1 of 6C. Surgery was done by manner of simple rod rotation on the concave side and in situ coronal bending. Coronal Cobb's angles, vertebral rotation angles and SRS-22 were measured on a plain standing X-ray and CT before and after surgery. The mean follow up period was 25.7 months (range : 5-52). The mean number of screw positioning level was nine (6-12). The mean age was 16.4 years (range : 13-25) at surgery. The mean Risser grade was 3.7±0.9. Th...

Research paper thumbnail of Surgical Treatment of the Atlantoaxial Osteoarthritis

Journal of Korean Neurosurgical Society, 2007

Atlantoaxial facet joint osteoarthritis is rare, often undiagnosed because it may be misdiagnosed... more Atlantoaxial facet joint osteoarthritis is rare, often undiagnosed because it may be misdiagnosed as occipital neuralgia, or degenerative cervical spondylosis. Unilateral occipitocervical pain aggravated by head rotation is a specific symptom. Conservative treatment is usually effective. But when the patient complains of intractable neck pain localized to occipitocervical junction and unresponsive to medical therapy, surgical treatment should be considered. Though a few reports of surgically treated atlantoaxial osteoarthritis has been published, surgical outcome is favorable. A case of a surgically treated atlantoaxial osteoarthritis is presented with a review of the literatures.

Research paper thumbnail of Analysis of Causes of Deaths of the Patients Who Had a Head Injury with Multiple Traumas in Emergency Department

Journal of Korean Neurotraumatology Society, 2008

Objective: The mortality rate of patients with isolated head injuries is about 20-30%, whereas in... more Objective: The mortality rate of patients with isolated head injuries is about 20-30%, whereas in multiple traumas with head injuries mortality rates can reach over 40%. The authors reviewed the multiple trauma patients with traumatic brain injury who died in emergency department and wanted to describe causes of deaths and to reconsider the role of neurosurgeons in association with trauma team. Methods: Between July 1999 and May 2007, 48 patients who had multiple traumas were dead in the emergency department of our hospital before admission. Of them, 42 patients were selected in this study. Twenty eight were male and 14 were female. The medical and radiological records were reviewed retrospectively. Results: The mode of accidents consisted of 18 pedestrian traffic accidents (TAs), 10 falls, 5 in car TAs, 4 motorcycle accidents, and 5 others. Initial mentality showed that alert or drowsy were 20 (47.6%), stupor 6 (14.3%), and semicoma or coma 16 (38.1%). Most frequent cause of deaths was hypovolemic shock and followed by hypoxia, severe brain swelling, and tension pneumothorax. The major causes of hypovolemia were pelvic bone fracture and abdominal bleeding. Among them, brain computed tomography (CT) and abdomen CT could be checked in 43% of patients and peripheral angiography in only 5 patients (12%). Conclusion: The major cause of deaths of patients who had traumatic brain injury with multiple traumas in emergency department was not brain injury but hypovolemic shock. Early detection and adequate management of bleeding causes might decrease the mortality.

Research paper thumbnail of Biomechanical comparisons of pull-out strengths after pedicle screw augmentation with hydroxyapatite, calcium phosphate or polymethylmethacrylate in the cadaveric spine

World neurosurgery, Jan 10, 2015

In vertebrae with low bone mineral densities pull-out strength is often poor, thus various substa... more In vertebrae with low bone mineral densities pull-out strength is often poor, thus various substances have been used to fill screw holes prior to screw placement for corrective spine surgery. We performed biomechanical cadaveric studies to compare non-augmented pedicle screws versus hydroxyapatite-, calcium phosphate- or polymethylmethacrylate-augmented pedicle screws for screw-tightening torques and pull-out strengths in spine procedures requiring bone screw insertion. Seven human cadaveric T10-L1 spines with 28 vertebral bodies were examined by x-ray to exclude bony abnormalities. Dual-energy x-ray absorptiometry scans evaluated bone mineral densities. Twenty of 28 vertebrae underwent ipsilateral fluoroscopic placement of 6-mm holes augmented with hydroxyapatite, calcium phosphate or polymethylmethacrylate, followed by transpedicular screw placements. Controls were pedicle screw placements in the contralateral hemivertebrae without augmentation. All groups were evaluated for axial...

Research paper thumbnail of Biomechanical Comparison of Cervical Fixation via Transarticular Facet Screws without Rods versus Lateral Mass Screws with Rods

Research paper thumbnail of Radiological Considerations of Posterior Cervical Lateral Mass Fixation Using Plate and Screw

Yonsei Medical Journal, 2004

Research paper thumbnail of A Multi-center Clinical Study of Posterior Lumbar Interbody Fusion with the Expandable Stand-alone Cage (Tyche(R) Cage) for Degenerative Lumbar Spinal Disorders

Journal of Korean Neurosurgical Society, 2007

This multi-center clinical study was designed to determine the long-term results of patients who ... more This multi-center clinical study was designed to determine the long-term results of patients who received a one-level posterior lumbar interbody fusion with expandable cage (Tyche(R) cage) for degenerative spinal diseases during the same period in each hospital. Fifty-seven patients with low back pain who had a one-level posterior lumbar interbody fusion using a newly designed expandable cage were enrolled in this study at five centers from June 2003 to December 2004 and followed up for 24 months. Pain improvement was checked with a Visual Analogue Scale (VAS) and their disability was evaluated with the Oswestry Disability Index. Radiographs were obtained before and after surgery. At the final follow-up, dynamic stability, quality of bone fusion, interveretebral disc height, and lumbar lordosis were assessed. In some cases, a lumbar computed tomography scan was also obtained. The mean VAS score of back pain was improved from 6.44 points preoperatively to 0.44 at the final visit and ...

Research paper thumbnail of Quantitative Pfirrmann Disc Degeneration Grading System to Overcome the Limitation of Pfirrmann Disc Degeneration Grade

Korean Journal of Spine, 2016

Objective: Pfirrmann disc degeneration grade is one of morphologic disc degeneration grading syst... more Objective: Pfirrmann disc degeneration grade is one of morphologic disc degeneration grading system and it was reliable on routine T2-weighted magnetic resonance (MR) images. The purpose of this study was to evaluate the agreement of Pfirrmann disc degeneration grade, and check the alternative technique of disc degeneration grading system. Methods: Fifteen volunteers (4 medical doctors related to spinal disease, 2 medical doctors not related to spinal disease, 6 nurses in spinal hospital, and 3 para-medicines) were included in this study. Three different digitalized MR images were provided all volunteers, and they checked Pfirrmann disc degeneration grade of each disc levels after careful listening to explanation. Indeed, all volunteers checked the signal intensity of disc degeneration at the points of nucleus pulposus (NP), disc membrane, ligaments, fat, and air to modify the quantitative Pfirrmann disc degeneration grade. Results: Total 225 grade results of Pfirrmann disc degeneration grade and 405 signal intensity results of quantitative Pfirrmann disc degeneration grade were analyzed. Average interobserver agreement was "moderate (mean±standard deviation, 0.575±0.251)" from poor to excellent. Completely agreed levels of Pfirrmann disc degeneration grade were only 4 levels (26.67%), and the disagreement levels were observed in 11 levels; two different grades in 8 levels (53.33%) and three different grades in 3 levels (20%). Quantitative Pfirrmann disc degeneration showed relatively cluster distribution with the interobserver deviations of 0.41-1.56 at the ratio of NP and disc membrane, and it showed relatively good cluster and distribution indicating that the proposed grading system has good discrimination ability. Conclusion: Pfirrmann disc degeneration grade showed the limitation of different interobserver results, but this limitation could be overcome by using quantitative techniques of MR signal intensity. Further evaluation is needed to access its advantage and reliabilities.

Research paper thumbnail of Ruptured Intracranial Aneurysm in a 45-day-old Infant

Research paper thumbnail of Clinical and Radiological Comparison of Semirigid (WavefleX) and Rigid System for the Lumbar Spine

Korean Journal of Spine, 2016

Spinal fusion operation is an effective treatment in the spinal pathology, but it could change th... more Spinal fusion operation is an effective treatment in the spinal pathology, but it could change the physiological distribution of load at the instrumented and adjacent segments. This retrospective study compared the radiological and clinical outcomes of patients undergoing lumbar fusion with semirigid rods versus rigid rods system. Using transpedicular fixation and posterior lumbar interbody fusion at the level of L4/L5, 20 patients were treated with semirigid rods (WavefleX, SR group), and 20 patients with rigid rods (titanium, RR group). Clinical and radiological outcomes were evaluated, including visual analog score for lower back pain and leg pain, Prolo functional and economic scores, statues of implanted instruments, fusion rate, and complications during 24-month follow-up. Clinical scores were significantly improved until postoperative 24-month follow-up as compared with preoperative scores in both groups (p<0.05), with similar levels of improvement observed at the same tim...

Research paper thumbnail of Concurrence of Traumatic Spinal Epidural and Subdural Hematoma without Spine Injury at Occipitocervical Junction: A Cases Report

Journal of Korean Neurosurgical Society, Nov 1, 1998

Exit gevangenis? De werking van de strafuitvoeringsrechtbanken en de wet op de externe rechtsposi... more Exit gevangenis? De werking van de strafuitvoeringsrechtbanken en de wet op de externe rechtspositie van veroordeelden tot een vrijheidsstraf Sinds de zaak 'Dutroux' in 1996 is het vrij komen van gedetineerden regelmatig voorwerp van emotionele discussies in de media. De belangen van slachtoffers en gedetineerden worden vaak tegenover elkaar uitgespeeld. Punten Orde van Vlaamse Balies: 4 punten in aanvraag. IGO: goedkeuring aangevraagd

Research paper thumbnail of Usefulness of Simple Rod Rotation to Correct Curve of Adolescent Idiopathic Scoliosis

Journal of Korean Neurosurgical Society, 2015

To correct apical vertebral rotation for adolescent idiopathic scoliosis (AIS), direct vertebral ... more To correct apical vertebral rotation for adolescent idiopathic scoliosis (AIS), direct vertebral derotation (DVD) or simple rod rotation (SRR) might be considered. The aim of the present study is to introduce the surgical experiences of AIS by a Korean neurosurgeon and to evaluate the effectiveness of SRR for apical vertebral rotation. A total of 9 patients (1 male and 8 females) underwent scoliosis surgery by a neurosurgeon of our hospital. The Lenke classifications of the patients were 1 of 1B, 2 of 1C, 1 of 2A, 1 of 2C, 3 of 5C and 1 of 6C. Surgery was done by manner of simple rod rotation on the concave side and in situ coronal bending. Coronal Cobb's angles, vertebral rotation angles and SRS-22 were measured on a plain standing X-ray and CT before and after surgery. The mean follow up period was 25.7 months (range : 5-52). The mean number of screw positioning level was nine (6-12). The mean age was 16.4 years (range : 13-25) at surgery. The mean Risser grade was 3.7±0.9. Th...

Research paper thumbnail of Surgical Treatment of the Atlantoaxial Osteoarthritis

Journal of Korean Neurosurgical Society, 2007

Atlantoaxial facet joint osteoarthritis is rare, often undiagnosed because it may be misdiagnosed... more Atlantoaxial facet joint osteoarthritis is rare, often undiagnosed because it may be misdiagnosed as occipital neuralgia, or degenerative cervical spondylosis. Unilateral occipitocervical pain aggravated by head rotation is a specific symptom. Conservative treatment is usually effective. But when the patient complains of intractable neck pain localized to occipitocervical junction and unresponsive to medical therapy, surgical treatment should be considered. Though a few reports of surgically treated atlantoaxial osteoarthritis has been published, surgical outcome is favorable. A case of a surgically treated atlantoaxial osteoarthritis is presented with a review of the literatures.

Research paper thumbnail of Analysis of Causes of Deaths of the Patients Who Had a Head Injury with Multiple Traumas in Emergency Department

Journal of Korean Neurotraumatology Society, 2008

Objective: The mortality rate of patients with isolated head injuries is about 20-30%, whereas in... more Objective: The mortality rate of patients with isolated head injuries is about 20-30%, whereas in multiple traumas with head injuries mortality rates can reach over 40%. The authors reviewed the multiple trauma patients with traumatic brain injury who died in emergency department and wanted to describe causes of deaths and to reconsider the role of neurosurgeons in association with trauma team. Methods: Between July 1999 and May 2007, 48 patients who had multiple traumas were dead in the emergency department of our hospital before admission. Of them, 42 patients were selected in this study. Twenty eight were male and 14 were female. The medical and radiological records were reviewed retrospectively. Results: The mode of accidents consisted of 18 pedestrian traffic accidents (TAs), 10 falls, 5 in car TAs, 4 motorcycle accidents, and 5 others. Initial mentality showed that alert or drowsy were 20 (47.6%), stupor 6 (14.3%), and semicoma or coma 16 (38.1%). Most frequent cause of deaths was hypovolemic shock and followed by hypoxia, severe brain swelling, and tension pneumothorax. The major causes of hypovolemia were pelvic bone fracture and abdominal bleeding. Among them, brain computed tomography (CT) and abdomen CT could be checked in 43% of patients and peripheral angiography in only 5 patients (12%). Conclusion: The major cause of deaths of patients who had traumatic brain injury with multiple traumas in emergency department was not brain injury but hypovolemic shock. Early detection and adequate management of bleeding causes might decrease the mortality.

Research paper thumbnail of Biomechanical comparisons of pull-out strengths after pedicle screw augmentation with hydroxyapatite, calcium phosphate or polymethylmethacrylate in the cadaveric spine

World neurosurgery, Jan 10, 2015

In vertebrae with low bone mineral densities pull-out strength is often poor, thus various substa... more In vertebrae with low bone mineral densities pull-out strength is often poor, thus various substances have been used to fill screw holes prior to screw placement for corrective spine surgery. We performed biomechanical cadaveric studies to compare non-augmented pedicle screws versus hydroxyapatite-, calcium phosphate- or polymethylmethacrylate-augmented pedicle screws for screw-tightening torques and pull-out strengths in spine procedures requiring bone screw insertion. Seven human cadaveric T10-L1 spines with 28 vertebral bodies were examined by x-ray to exclude bony abnormalities. Dual-energy x-ray absorptiometry scans evaluated bone mineral densities. Twenty of 28 vertebrae underwent ipsilateral fluoroscopic placement of 6-mm holes augmented with hydroxyapatite, calcium phosphate or polymethylmethacrylate, followed by transpedicular screw placements. Controls were pedicle screw placements in the contralateral hemivertebrae without augmentation. All groups were evaluated for axial...

Research paper thumbnail of Biomechanical Comparison of Cervical Fixation via Transarticular Facet Screws without Rods versus Lateral Mass Screws with Rods

Research paper thumbnail of Radiological Considerations of Posterior Cervical Lateral Mass Fixation Using Plate and Screw

Yonsei Medical Journal, 2004

Research paper thumbnail of A Multi-center Clinical Study of Posterior Lumbar Interbody Fusion with the Expandable Stand-alone Cage (Tyche(R) Cage) for Degenerative Lumbar Spinal Disorders

Journal of Korean Neurosurgical Society, 2007

This multi-center clinical study was designed to determine the long-term results of patients who ... more This multi-center clinical study was designed to determine the long-term results of patients who received a one-level posterior lumbar interbody fusion with expandable cage (Tyche(R) cage) for degenerative spinal diseases during the same period in each hospital. Fifty-seven patients with low back pain who had a one-level posterior lumbar interbody fusion using a newly designed expandable cage were enrolled in this study at five centers from June 2003 to December 2004 and followed up for 24 months. Pain improvement was checked with a Visual Analogue Scale (VAS) and their disability was evaluated with the Oswestry Disability Index. Radiographs were obtained before and after surgery. At the final follow-up, dynamic stability, quality of bone fusion, interveretebral disc height, and lumbar lordosis were assessed. In some cases, a lumbar computed tomography scan was also obtained. The mean VAS score of back pain was improved from 6.44 points preoperatively to 0.44 at the final visit and ...

Research paper thumbnail of Quantitative Pfirrmann Disc Degeneration Grading System to Overcome the Limitation of Pfirrmann Disc Degeneration Grade

Korean Journal of Spine, 2016

Objective: Pfirrmann disc degeneration grade is one of morphologic disc degeneration grading syst... more Objective: Pfirrmann disc degeneration grade is one of morphologic disc degeneration grading system and it was reliable on routine T2-weighted magnetic resonance (MR) images. The purpose of this study was to evaluate the agreement of Pfirrmann disc degeneration grade, and check the alternative technique of disc degeneration grading system. Methods: Fifteen volunteers (4 medical doctors related to spinal disease, 2 medical doctors not related to spinal disease, 6 nurses in spinal hospital, and 3 para-medicines) were included in this study. Three different digitalized MR images were provided all volunteers, and they checked Pfirrmann disc degeneration grade of each disc levels after careful listening to explanation. Indeed, all volunteers checked the signal intensity of disc degeneration at the points of nucleus pulposus (NP), disc membrane, ligaments, fat, and air to modify the quantitative Pfirrmann disc degeneration grade. Results: Total 225 grade results of Pfirrmann disc degeneration grade and 405 signal intensity results of quantitative Pfirrmann disc degeneration grade were analyzed. Average interobserver agreement was "moderate (mean±standard deviation, 0.575±0.251)" from poor to excellent. Completely agreed levels of Pfirrmann disc degeneration grade were only 4 levels (26.67%), and the disagreement levels were observed in 11 levels; two different grades in 8 levels (53.33%) and three different grades in 3 levels (20%). Quantitative Pfirrmann disc degeneration showed relatively cluster distribution with the interobserver deviations of 0.41-1.56 at the ratio of NP and disc membrane, and it showed relatively good cluster and distribution indicating that the proposed grading system has good discrimination ability. Conclusion: Pfirrmann disc degeneration grade showed the limitation of different interobserver results, but this limitation could be overcome by using quantitative techniques of MR signal intensity. Further evaluation is needed to access its advantage and reliabilities.