• Journal of the Korean Society for Heat Treatment
• /
• v.18 no.1
• /
• pp.41-45
• /
• 2005

• Journal of Trauma and Injury
• /
• v.22 no.2
• /
• pp.254-259
• /
• 2009

Purpose: Pelvic trauma is a serious skeletal injury with high mortality. Especially in cases of severe injury trauma, treatment outcomes depend on early diagnosis and intervention. We expect trauma surgeon to play an important role in the management of severe multiple trauma patients. Methods: A retrospective study was performed on pelvic trauma patients with hemodynamic instability between March 2005 and September 2009. We divided the time period into period I (March 2005~Feburary 2009) and period II (March 2009~September 2009). The trauma surgeon and team started to work from period II. Data were collected regarding demographic characteristics, mechanism of injury, type of pelvic fracture, ISS(injury severity score), treatment modality, transfusion requirement, time to definitive treatment, and mortality. Results: During period I, among 7 hemodynamically unstable patients, 4(57.1%) patients died. However during Period II, only one of 6(16.6%) patients died. The demographic data and injury scores showed no differences between the two time periods, but the time to definitive treatment was very short with trauma team intervention(14.4 hrs vs. 3.9 hrs). Also, the amount of transfusion was less(41.1 U vs. 13.9 U). With arterial embolization, early pelvic external fixation led to less transfusion and made patients more stable. Conclusion: This study demonstrated the importance of the trauma surgeon and the trauma team in cases of hemodynamically unstable pelvic trauma. Even with the same facility and resources, an active trauma team approach can increase the survival of severely injured multiple trauma patients.

• Journal of the Korean Ceramic Society
• /
• v.50 no.6
• /
• pp.470-475
• /
• 2013

In this study, we report that effects of a filler with a high coefficient of thermal expansion on a sealant for high-temperature ($750{\sim}850^{\circ}C$) SOFC. We designed a $SiO_2-BaO-ZnO-B_2O_3-Al_2O_3$ glass system with a softening temperature higher than $750^{\circ}C$. The properties of the glass system show not only low volumetric shrinking but also low swelling. The glass system did not create a crystal phase during along-term heat treatment. We fabricated a seal gasket with 0, 10, 15, and 20 wt% cristobalite added as filler materials with glass powder. The coefficient of thermal expansion of the seal gasket increased according to cristobalite content. During along-term heat treatment, the leak rate decreased by about 5% after a heat treatment in an oxidizing atmosphere at $750^{\circ}C$ for 2000 h, also decreasing by about 6% after a heat treatment in a reducing atmosphere at $750^{\circ}C$ for 1000 h.

• Journal of Trauma and Injury
• /
• v.34 no.3
• /
• pp.212-217
• /
• 2021

Various medical scenarios have arisen with the prolonged coronavirus disease 2019 (COVID-19) pandemic. In particular, the increasing number of asymptomatic COVID-19 patients has prompted reports of emergency surgical experiences with these patients at regional trauma centers. In this report, we describe an example. A 25-year-old male was admitted to the emergency room after a traffic accident. The patient presented with stuporous mentality, and his vital signs were in the normal range. Lacerations were observed in the left eyebrow area and preauricular area, with hemotympanum in the right ear. Brain computed tomography showed a contusional hemorrhage in the right frontal area and an epidural hematoma in the right temporal area with a compound, comminuted fracture and depressed skull bone. Surgical treatment was planned, and the patient was intubated to prepare for surgery. A blood transfusion was prepared, and a central venous catheter was secured. The initial COVID-19 test administered upon presentation to the emergency room had a positive result, and a confirmatory polymerase chain reaction (PCR) test was administered. The PCR test confirmed a positive result. Emergency surgical treatment was performed because the patient's consciousness gradually deteriorated. The risk of infection was high due to the open and unclean wounds in the skull and brain. We prepared and divided the COVID-19 surgical team, including the patient's transportation team, anesthesia team, and surgical preparation team, for successful surgery without any transmission or morbidity. The patient recovered consciousness after the operation, received close monitoring, and did not show any deterioration due to COVID-19.

• The Journal of Korean Obstetrics and Gynecology
• /
• v.32 no.3
• /
• pp.227-244
• /
• 2019

Objectives: To evaluate the effectiveness and safety of application of Traditional East Asian Herbal Medicine (TEAM) in the treatment of Atrophic Vaginitis (AV). Methods: Randomized Controlled Trials (RCTs) were obtained from PubMed, Cochrane Library, Embase, CNKI, RISS, NDSL, and KISS. The risk of bias was assessed by using Cochrane's risk of bias tool, and RevMan 5.3 software was used. Results: 26 RCTs with 3,162 patients were identified and reviewed. Among them, 21 RCTs observe the effect of integrated traditional Chinese and Western medicine. 23 RCTs reported treatment groups was statistically effective than control groups in the study. Also, the recurrence rate was estimated in 10 RCTs and was lower than control groups. 12 studies observed adverse events (AEs) and severe AEs were not reported. Conclusions: This review suggested that TEAM was safe and effective in the treatment of AV. TEAM may also decrease the recurrence rate. However, this could not be proven conclusively. To ensure evidence-based clinical practice, well-designed trials with larger sample sizes are needed.

• Journal of Korean Society of Environmental Engineers
• /
• v.29 no.8
• /
• pp.876-883
• /
• 2007

• Proceedings of the Korea Society of Environmental Biology Conference
• /
• 2005.12a
• /
• pp.89-89
• /
• 2005

• Korean Journal of Materials Research
• /
• v.24 no.12
• /
• pp.689-693
• /
• 2014

Anti-reflection coating films have used to increase the transmittance of displays and enhance the efficiency of solar cells. Hydrophobic anti-reflection coating films were fabricated on a glass substrate by sol-gel method. To fabricate an anti-reflection film with a high transmittance, poly ethylene glycol (PEG) was added to tetraethyl orthosilicate (TEOS) solution. The content of PEG was changed from 1 to 4 wt% in order to control the morphology, thickness, and refractive index of the $SiO_2$ thin films. The reflectance and transmittance of both sides of the coated thin film fabricated with PEG 4 wt% solution were 0.3% and 99.4% at 500 nm wavelength. The refractive index and thickness of the thin film were n = 1.29 and d = 105 nm. Fluoro alkyl silane (FAS) was used for hydrophobic treatment on the surface of the anti-reflection thin film. The contact angle was increased from $13.2^{\circ}$ to $113.7^{\circ}$ after hydrophobic treatment.

• Journal of Pharmaceutical Investigation
• /
• v.38 no.6
• /
• pp.357-363
• /
• 2008

Penetration rate of large molecule through skin is very low due to the barrier effect of stratum corneum. Novel microneedle treatment device with roll was designed for transdermal delivery of large molecular drugs such as vaccine and protein drugs. The permeation rates of FITC labelled bovine serum albumin (FITC-BSA) as a model protein were determined using modified Franz diffusion cell and hairless mouse skin which were treated by hydrogel or solution containing FITC-BSA. Fluorescent spectrophotometer was used to analyze the concentration of FITC-BSA. Microscope using fluorescent filter was used to capture the image and location of FITC-BSA in the skin. We confirmed that permeation rate of BSA was increased with the treatment by microneedle and was increased by the increasing frequency of treatment. Furthermore, the permeation rate observed from hydrogel treated skin was significantly higher than that from solution treated skin.

• Journal of Trauma and Injury
• /
• v.34 no.2
• /
• pp.105-111
• /
• 2021

Purpose: Open extremity fractures require prompt antibiotic medication and initial debridement surgery to reduce the infection rate and restore functional stabilization. We aimed to report the effects and positive outcomes of a trauma team approach on the management of open extremity fractures in polytrauma patients. Methods: This retrospective review included all polytrauma patients with open extremity fractures admitted between March 2009 and December 2019. Patients were divided into two groups according to whether they were treated before or after the implementation of the trauma team approach (March 2014). We analyzed the outcomes in each group with respect to the time interval until the doctor's arrival, total length of stay in the emergency department, the time interval until initial antibiotic treatment and operation, whether the initial operation was performed within 24 hours, and the rate of deep infections. Results: A total of 123 patients met the inclusion criteria. There were no statistically significant differences in demographic characteristics. The time interval until the doctor's arrival (64.12±49.2 minutes vs. 19.82±15.23 minutes; p=0.035) and initial antibiotic treatment (115.47±72.12 minutes vs. 48.78±30.12 minutes; p=0.023) significantly improved after implementing the trauma team approach. The union rate was not significantly different. However, the time interval until initial debridement, opportunity for initial debridement within 24 hours, and the rate of deep infections demonstrated better results. Conclusions: The reduced time interval until initial antibiotic treatment and debridement could be attributed to the positive effect of the trauma team approach on the management of open extremity fractures in polytrauma patients.