1.Comparison of Oxygenation and Lung Damage of High Frequency Flow Interruption to Conventional Ventilation in Surfactant Deficient Rabbits.
Chang Keun KIM ; Churl Young CHUNG ; Hye Jae CHO
Journal of the Korean Pediatric Society 1995;38(5):591-601
No abstract available.
Lung*
;
Oxygen*
;
Rabbits*
;
Ventilation*
2.Ruptured Disc Fragment as a Cause of Reduction Failure in the Dislocation of the Cervical Spine.
Jae Yoon CHUNG ; Keun Bae LEE ; Yu Bok PARK
Journal of Korean Society of Spine Surgery 1998;5(2):255-262
STUDY DESIGN: Thirteen patients with cervical interlocked facets dislocation in whom closed reduction by skull traction was failed were evaluated about the patterns of ruptured disc fragment. Objects : To evaluate the causes of failure at closed reduction, and the relation between ruptured discs and interlocked facets, and the treatment results through an anterior approach. SUMMARY OF LITERATURE REVIEW: In traumatic dislocation of the cervical facet joints, spinal cord or nerve roots injury associated with the ruptured disc fragment has been reported. However, there is few report evaluating the patterns of ruptured disc fragment as a cause of reduction failure. MATERIALS AND METHODS: Between 1988 and 1997, thirteen patients were treated by anterior fusion with plate after complete removal of the intervertebral disc through anterior approach and reduction of interlocked facets by O1iveira method. They have been followed for an average of 36 months(range : 12-96 months). The interlocking was bilateral in seven cases and unilateral in six cases. We assessed the types of ruptured disc fragment by preoperative MRI and CT and the clinical and radiological results. RESULTS: Ruptured disc fragment was found in all thirteen patients with interlocked facets dislocation. The patterns of ruptured discs were within the uncovertebral joints in 5 cases, posterioly under the posterior longitudinal ligament in 3 cases, anteriorly under intact anterior longitudinal ligament in 3 cases and combined under the anterior and posterior longitudinal ligament in 2 cases. The displacement of ruptured disc fragment were seemed to be the cause of failure in closed reduction. CONCLUSIONS: Intervertebral disc injury should be evaluated carefully with MRI and CT in the lower cervical interlocked facet dislocations before trial of reduction or decision makings of treatment.
Dislocations*
;
Humans
;
Intervertebral Disc
;
Joints
;
Longitudinal Ligaments
;
Magnetic Resonance Imaging
;
Skull
;
Spinal Cord
;
Spine*
;
Traction
;
Zygapophyseal Joint
3.Comparison between time-domain and spectral-domain OCT in the detection of retinal nerve fiber layer defects in glaucoma patients
Chung Keun JAE ; Yoo Cheol YOUNG
International Eye Science 2018;18(5):775-780
AIM: To compare the use of the instruments' built-in normative databases, the sensitivities of time-domain optical coherence tomography (Stratus OCT) and spectral-domain OCT(Spectralis OCT) in the detection of retinal nerve fiber layer (RNFL) defects in patients with glaucoma. METHODS: Fifty-two eyes of 35 patients with open angle glaucoma were included. A total of 69 hemiretinas with photographically identified RFNL defects were analyzed using the fast RNFL scan of Stratus OCT and the circle scan in Spectralis OCT. The OCT parameters were evaluated at 5% and 1% abnormality levels using the instruments' built-in normative databases. The diagnostic sensitivity of each parameter was compared between the two devices. RESULTS: The Spectralis OCT detected RNFL defects within each quadrant more frequently than the Stratus OCT at both the 5% (79 7% vs 63 8%,P=0 01) and 1% (56 5% vs 40 6%, P = 0 01) abnormality levels. At the 1% abnormality level,the sensitivity was significantly higher in the standard sector of Spectralis OCT than in the clock-hour sector of the Stratus OCT(68 1% vs 39 1%,P<0 01). CONCLUSIONS: Using the instruments' built - in normative databases, the diagnostic sensitivity of the Spectralis OCT parameters was higher than that of the Stratus OCT parameters for detecting glaucomatous RNFL defects.
4.Anterior Discectomy and Fusion with Plate Fixation for Cervical Disc Herniation.
Jae Yoon CHUNG ; Keun Bae LEE ; Ki Tae YI
The Journal of the Korean Orthopaedic Association 1998;33(3):769-776
The anterior discectomy is widely accepted method for removal of the herniated disc material of cervical spine due to direct visualization of the lesion site. In addition, it is believed to prevent recurrence of herniation, progression of degenerative change, and to preserve normal cervical lordosis after the fusion. For more effective anterior fusion and early postoperative ambulation without prolonged external support, internal fixation technique was introducsuspected to influence the result of operation, the type of bone graft and age of the patient may be the effective factors to the late result. ed. Authors reviewed 36 patients with cervical disc herniation and evaluated the result of anteior discectomy and fusion with plate fixation. With a mean follow up of 34 months, there were remarkable symptomatic improvement at most instances and bony union in situ within 3 months in all cases after the operation. Disclosed complications were 2 cases of hoarseness which was improved spontaneously, and 1 case of dysphagia. At the comparison of the effect of the factors which were suspected to influence the result of operation , the type of bone graft and age of the patient may be the effective factors to the late result.
Animals
;
Deglutition Disorders
;
Diskectomy*
;
Follow-Up Studies
;
Hoarseness
;
Humans
;
Intervertebral Disc Displacement
;
Lordosis
;
Recurrence
;
Spine
;
Transplants
;
Walking
5.Percutaneous Transluminal Angioplasty of Subclavian Artery: Case Report.
Heoung Keun KANG ; Jae Kyu KIM ; Hyon De CHUNG ; Yun Hyeon KIM ; Tae Woong CHUNG
Journal of the Korean Radiological Society 1994;30(6):1035-1038
Percutaneous transluminal angioplasty(PTA) were performed in three patients with atherosclerotic stenosis of subclavian arteries. The arteries were successfully dilated without complications during the procedure. All patients were asymptomatic during follow-up periods ranging from eight months to fifteen months after PTA.
Angioplasty*
;
Arteries
;
Constriction, Pathologic
;
Follow-Up Studies
;
Humans
;
Subclavian Artery*
6.Left cervical aortic arch and persistent left superior vena cava in the SAME patient: case report.
Jae Kyu KIM ; Jae Sook MA ; Heoung Keun KANG ; Hyon De CHUNG
Journal of the Korean Radiological Society 1991;27(1):82-86
No abstract available.
Aorta, Thoracic*
;
Humans
;
Vena Cava, Superior*
7.Analysis of malignant ovarian tumors with second look operation.
Keun Jae YOO ; Yeon PARK ; Min Soo KIM ; Jae Hoon CHUNG
Korean Journal of Obstetrics and Gynecology 1993;36(3):377-389
No abstract available.
8.Workers' health status related working environments in small and medium sized industries.
Kyoo Sang KIM ; Jae Hoon ROH ; Kyung Jong LEE ; Ho Keun CHUNG ; Young Hahn MOON
Korean Journal of Occupational and Environmental Medicine 1993;5(1):3-14
No abstract available.
9.A Case of Familial Treacher-Collins Syndrome.
Sang Hee CHO ; Hye Sun CHUNG ; Gwi Jong CHOI ; Heung Jae LEE ; Keun Soo LEE
Journal of the Korean Pediatric Society 1983;26(12):1215-1219
No abstract available.
10.The Result of Minimally Invasive Transforaminal Lumbar Interbody Fusion in Low Grade Spondylolisthesis - Minimum 2 Years Follow Up -.
Hung Tae CHUNG ; Jae Lim CHO ; Moon Chan KIM ; Woo Chul KIM ; Do Keun KIM
Journal of Korean Society of Spine Surgery 2013;20(1):22-27
STUDY DESIGNS: A retrospective study. OBJECTIVES: To analyze the clinical and radiological outcomes of spontaneous reduction via minimally invasive transforaminal lumbar interbody fusion (Mini-TLIF) as the treatment for low-grade symptomatic spondylolisthesis. SUMMARY OF LITERATURE REVIEW: Although minimally invasive transforaminal lumbar interbody fusion is technically demanding, this procedure is an effective method for spontaneous reduction of low grade spondylolisthesis. MATERIALS AND METHODS: We analyzed consecutive series of 41 patients with low grade spondylolisthesis who underwent minimally invasive transforaminal lumbar interbody fusion, between April 2008 and July 2009. The minimum follow-up period was 2 years. Clinical evaluation was performed by an analysis of Visual Analogue Scale and Oswestry Disability Index. For the radiological evaluation, disc space height, slip percentage, and slip angle were analyzed. At the final follow-up, the fusion rate was analyzed according to the Bridwell's anterior fusion grade. RESULTS: For the evaluation of clinical outcomes, the Visual Analogue Scale for back pain decreased from 6.8+/-1.2 to 2.0+/-1.1, and that for radiating pain decreased from 7.9+/-1.3 to 1.7+/-1.1. Oswetry Disability Index decreased from 38.5+/-8.4 to 13.4+/-6.1. For the radiological evaluation, disc space height increased from 8.4+/-2.14mm to 11.8+/-1.54mm(P<0.05), slip percentage was reduced from 18.4+/-5.1% to 13.3+/-3.1%(P<0.05) and slip angle decreased from 10.6+/-4.5degrees to 6.2+/-3.4degrees (P<0.05). At the final follow-up, radiological union was obtained in 38 cases (92.7%). CONCLUSIONS: We conclude that minimally invasive transforaminal lumbar interbody fusion appears to be an effective method for spontaneous reduction of low grade spondylolisthesis if the surgeon becomes familiar with this method.
Back Pain
;
Follow-Up Studies
;
Humans
;
Retrospective Studies
;
Spondylolisthesis