1.Internal Carotid Artery Aneurysms Arising from the Medial Wall of the Communicating Segment of the Internal Carotid Artery: Case Report.
Jong Won LEE ; Jong Sik SUK ; Jung Taek KWON ; Byung Kook MIN
Journal of Korean Neurosurgical Society 2000;29(10):1352-1356
No abstract available.
Aneurysm*
;
Carotid Artery, Internal*
2.Study of Bilirubin Concentration on The Neonatal Jaundice.
Seung Kwon KIM ; Woo Sik CHUNG ; Byung Do NAM ; Kew Taek KIM
Journal of the Korean Pediatric Society 1982;25(11):1089-1096
No abstract available.
Bilirubin*
;
Infant, Newborn
;
Jaundice, Neonatal*
3.Effects of the Sanjoin on the Rat Brain: Focused on Serotonin, Sleeping Time, Sleep EEG and Autonomic Activity.
Hee Yeon JEONG ; Young Joon KWON ; In Joon PARK ; Joon Taek KWON ; Byung Hoon HAN ; Sung Pil LEE
Journal of the Korean Society of Biological Psychiatry 1997;4(1):54-59
OBJECTS: Sanjoin, the seeds of Zizyphus vulgaris var. spinosus has been used as the most important hypnotic agent in chinese medicine to treat insomnia. This research was performed in order to examine the effect of betulinic acid and sanjoinine-A which are components of Sanjoin. METHOD: Sleeping time, sleep recordings of EEG, serum serotonin level, and locomotor activity were measured in rats which received betulinic acid and sanjoinine-A as sleep induction material extracted from Sanjoin. RESULTS: 1) Groups received betulinic acid, sanjoinine-A, and lorazepam showed increased sleep time than control group with saline. 2) Groups with betulinic acid, sanjoinine-A, lorazepam and saline recorded beta-wave in sleep recording of EEG. In there was no significant difference among all groups. 3) No significant difference in serum serotonin level among all groups was found. 4) In autonomic activity testing, groups of betulinic acid, sanjoinine-A, and lorazepam showed significantly more decreased in activity than saline group. In comparison of groups of betulinic acid and sanjoinine-A with a group of lorazepam, there was no significant difference. CONCLUSION: These results suggests that betulinic acid and sanjoinine-A have the sedative effect like lorazepam rather than sleep effect.
Animals
;
Asian Continental Ancestry Group
;
Brain*
;
Electroencephalography*
;
Humans
;
Hypnotics and Sedatives
;
Lorazepam
;
Motor Activity
;
Rats*
;
Serotonin*
;
Sleep Initiation and Maintenance Disorders
;
Ziziphus
4.Prediction of Type of Proximal Femur Fracture by Analysis of Serum Makers
Byung Taek KWON ; Seok Hyun KWON
Journal of Korean Society of Osteoporosis 2015;13(1):31-35
PURPOSE: To analyze serum markers in proximal femur fracture patients, which are known to be accompanied with osteophorosis or metabolic diseases, and consider it as predictive factor and to study how it affects on the fracture form. MATERIALS AND METHODS: Vit. D3 known as serum marker of Vit. D, 25(OH)D, and 1,25(OH)2D of 152 patients from April, 2013 to March, 2014 who visited our hospital and diagnosed as proximal femur fracture(Femur neck fracture 73, Intertrochanteric fracture 79) were analyzed. Also, serum calcium level corrected by serum protein, phosphate, creatinine, alkaline phosphatase, estradiol, IGF-1, and PTH were compared and analyzed. RESULTS: Femur neck fracture group showed significantly low value of D3, 25(OH)D, and 1,25(OH)2D (P-value<0.05) as the values were 37.72+/-7.21 pg/mL, 27.05+/-8.43 ng/mL, 25.05+/-6.78 pg/mL in femur neck fracture group, and 40.36+/-6.97 pg/mL, 29.54+/-9.12 ng/mL, 28.87+/-7.43 pg/mL in intertrochanteric fracture group respectively. The number of patients who were diagnosed as hypovitaminosis D. due to serum 25(OH)D value lower than 30ng/ml were significantly high in femur neck fracture group as the numbers were 56 in femur neck fracture, and 44 in intertrochanteric fracture. Serum calcium level corrected by serum protein, phosphate, creatinine, alkaline phosphatase, estradiol, IGF-1 and PTH level showed no significant difference between two groups. CONCLUSION: Serum 25(OH)D level was decreased in proximal femur fracture patiens, and was lower as the patient was older and BMD was lower. Therefore it is thought that proximal femur fracture is affected by vitamin D metabolism.
Alkaline Phosphatase
;
Biomarkers
;
Calcium
;
Creatinine
;
Estradiol
;
Femoral Neck Fractures
;
Femur
;
Humans
;
Insulin-Like Growth Factor I
;
Metabolic Diseases
;
Metabolism
;
Neck
;
Vitamin D
5.Minimally Invasive Spine Surgery: Techniques, Technologies, and Indications
Jiwon PARK ; Dae-Woong HAM ; Byung-Taek KWON ; Sang-Min PARK ; Ho-Joong KIM ; Jin S. YEOM
Asian Spine Journal 2020;14(5):694-701
Over the past few decades, interest in minimally invasive spine surgery (MISS) has increased tremendously due to its core principle of minimizing approach-related injury while providing outcomes similar to traditional open spine procedures. With technical and technological advancements, MISS has expanded its utility not only to simple spinal stenosis, but also to complex spinal pathologies such as metastasis, trauma, or adult spinal deformity. In this article, we review the techniques and technology in MISS and discuss the indications, benefits, and limitations of MISS.
6.Analysis of Platforms and Functions of Mobile-Based Personal Health Record Systems
Byung Kwan CHOI ; Young-Taek PARK ; Lee-Seung KWON ; Yeon Sook KIM
Healthcare Informatics Research 2020;26(4):311-320
Objectives:
Little is known about the platforms and functionalities of mobile-based personal health record (PHR) applications. The objective of this study was to investigate these two features of PHR systems.
Methods:
The unit of analysis was general hospitals with more than 100 beds. This study was based on a PHR survey conducted from May 1 to June 30, 2020 and the National Health Insurance administrative data as of March 31, 2020. The study considered the platform, Android and iPhone operation system (iOS), and types of functionalities of PHR systems. Among the 316 target hospitals, 103 hospitals had adopted PHR systems. A logistic regression analysis was used.
Results:
This study found that 103 hospitals had adopted mobile-based PHR systems for their patients. Sixty-four hospitals (62.1%) were adopting both Android and iOS, but 36 (35.0%) and 3 (2.9%) hospitals were adopting Android only or iOS only, respectively. The PHR systems of hospitals adopting both platforms were more likely to have functions for viewing prescriptions, clinical diagnostic test results, and upcoming appointment status compared to those adopting a single platform (p < 0.001). The number of beds (odds ratio [OR] = 1.004; confidence interval [CI], 1.001–1.007; p = 0.0029) and the number of computed tomography systems (CTs) per 100 beds (OR = 6.350; CI, 1.006–40.084; p = 0.0493) were significantly associated with the adoption of both platforms.
Conclusions
More than 60% of hospitals had adopted both Android and iOS platforms for their patients in Korea. Hospitals adopting both platforms had additional functionalities and significant association with the number of beds and CTs.
7.The Risk Factors of Pancreatic Fistula after Pancratoduodenectomy.
Ho Young KO ; Dong Eun PARK ; Jung Taek O ; Jung Nam KWON ; Byung Jun SO ; Kwon Mook CHAE
Journal of the Korean Surgical Society 2005;69(2):146-151
PURPOSE: Pancretojejunostomy leakage is the most dreaded complication after a pancratoduodenectomy. However, little is known about what causes the leakage and how to prevent it. The aim of this study was to dentify the risk factors for pancreatic leakage. This paper describes our experience of its management. METHODS: Between Aug. 1996 and Aug. 2003, 75 consecutive patients with periampullary cancer or benign disease received a pancreatoduodenectomy. The patients' clinical characterisitcs, pathological features and surgical findings were retrospectively evaluated. The patients were classified into those with major complication and rhose with no complications and the risk factors were analyzed. Pancreatic leakage, intraabdomnial fluid collection and abscess, intraabdomnial bleeding were categorized as major complications related to a pancreatic fistula. RESULTS: The postoperative mortality and morbidity rate was 2.6% and 36%, respectively. Univariate analysis showed that the pancreatic texture, pathologic diagnoses and comorbidity were significant risk factors for major complications (P= 0.003, 0.045, 0.02). Multivariate analyses revealed that the, pancreatic texture was the only significant risk factor (P=0.003). The preoperative serum albumin level and pancreatic texture were significant risk factors for pancreatic leakage (p=0.03, 0.025) and multivariate analysis showed that the pancreatic texture was also the most significant risk factor. CONCLUSION: Considering that the pancreatic texture is the most significant risk factor for a pancreatic fistula, the technical skill and experience of the surgeon appears to be important for its prevention.
Abscess
;
Comorbidity
;
Diagnosis
;
Hemorrhage
;
Humans
;
Mortality
;
Multivariate Analysis
;
Pancreatic Fistula*
;
Pancreaticoduodenectomy
;
Retrospective Studies
;
Risk Factors*
;
Serum Albumin
8.Effects of Flight Training on Vestibuloocular Reflex in Student-pilots.
Moon Young LEE ; Jung Taek OH ; Keun Sang KWON ; Tae Sung CHOI ; Byung Rim PARK
Korean Journal of Aerospace and Environmental Medicine 2003;13(2):99-103
The aim of this study was to investigate the effect of flight training on vestibuloocular reflex (VOR) induced by rotational chair test in student-pilots. The study group was divided into followings; control, prepilot (student-pilots before flight training), and student-pilot (after training). Gain, phase and symmetry of eye movement induced by sinusoidal harmonic acceleration with frequencies of 0.01, 0.02, 0.04, 0.08, 0.16, 0.32 Hz. Gain and phase did not show any significant differences between control and student-pilots before flight training in all frequencies. But there were significant gain differences between control and student-pilots after flight training in 0.01, 0.04, 0.08 frequencies. And phase showed significant differences between before and after flight training in student-pilots in 0.01, 0.04 Hz. These results suggest that the flight training would be attributable to modulate the vestibular function in the student-pilots.
Acceleration
;
Eye Movements
;
Reflex, Vestibulo-Ocular*
9.Intratumoral Administration of Dendritic Cells Combined with Hyperthermia Induces Both Local and Systemic Antitumor Effect in Murine Tumor Models.
Byung Hyun KWON ; Won Taek KIM ; Young Kan KI ; Dong Won KIM
The Journal of the Korean Society for Therapeutic Radiology and Oncology 2006;24(1):51-57
PURPOSE: We examined whether intratumoral (i.t.) administration of dendritic cells (DCs) into a treated tumor could induce local and systemic antitumor effects in a mouse tumor model. METHODS AND MATERIALS: C57BL/6 mice were inoculated s.c. in the right and left thighs with MCA-102 fibrosarcoma cells on day 0 and on day 7, respectively. On day 7, the tumors (usually 6 mm in diameter) on the right thigh were heated by immersing the tumor-bearing leg in a circulating water bath at 43 degrees C for 30 min; thereafter, the immature DCs were i.t administered to the right thigh tumors. This immunization procedure was repeated on days 7, 14 and 21. The tumors in both the right and left thighs were measured every 7 days and the average sizes were determined by applying the following formula, tumor size=0.5 x (length+width). Cytotoxicity assay was done to determine tumor-specific cytotoxic T-lymphocyte activity. RESULTS: Hyperthermia induced apoptosis and heat shock proteins (HSPs) in tumor occurred maximally after 6 hr. For the local treated tumor, hyperthermia (HT) alone inhibited tumor growth compared with the untreated tumors (p<0.05), and furthermore, the i.t. administered DCs combined with hyperthermia (HT+DCs) additively inhibited tumor growth compared with HT alone (p<0.05). On the distant untreated tumor, HT alone significantly inhibited tumor growth (p<0.05), and also HT+DCs potently inhibited tumor growth (p<0.001); however, compared with HT alone, the difference was not statistically significant. In addition, HT+DCs induced strong cytotoxicity of the splenocytes against tumor cells compared to DCs or HT alone. CONCLUSION: HT+DCs induced apoptosis and increased the expression of HSPs, and so this induced a potent local and systemic antitumor response in tumor-bearing mice. This regimen may be beneficial for the treatment of human cancers.
Animals
;
Apoptosis
;
Baths
;
Dendritic Cells*
;
Fever*
;
Fibrosarcoma
;
Heat-Shock Proteins
;
Hot Temperature
;
Humans
;
Immunization
;
Leg
;
Methods
;
Mice
;
T-Lymphocytes, Cytotoxic
;
Thigh
;
Water
10.Cytokine Induction of Intercellular Adhesion Molecule-1(ICAM-1) Expression on Human Glioblastoma Cell Line, U-251 MG, U-373 MG.
Jong Won LEE ; Jung Taek KWON ; Byung Kook MIN ; Seung Won PARK ; Young Baeg KIM ; Sung Nam HWANG ; Jong Sik SUK ; Duck Young CHOI
Journal of Korean Neurosurgical Society 2000;29(4):477-484
No abstract available.
Cell Line*
;
Glioblastoma*
;
Humans*