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Massive Hemorrhage Facial Fracture Patient Treated by Embolization
김무현,유재홍,김승수,양완석 대한두개안면성형외과학회 2016 Archives of Craniofacial Surgery Vol.17 No.1
Major maxillofacial bone injury itself can be life threatening from both cardiovascular point of view, as well as airway obstruction. Significant hemorrhage from facial fracture is an uncommon occurrence, and there is little in the literature to guide the management of these patients. We report a 73-year-old male driver who was transported to our hospital after a motor vehicle collision. The patient was hypotensive and tachycardic at presentation and required active fluid resuscitation and transfusion. The patient was intubated to protect the airway. All external attempts to control the bleeding, from packing to fracture reduction, were unsuccessful. Emergency angiogram revealed the bleeding to originate from terminal branches of the sphenopalatine artery, which were embolized. This was associated with cessation of bleeding and stabilization of vital signs. Despite the age and severity of injury, the patient recovered well and was discharged home at 3 months with full employment. In facial trauma patients with intractable bleeding, transcatheter arterial embolization should be considered early in the course of management to decrease mortality rate.
석탄의 연소과정에서 포집된 입자상 물질의 광학 특성에 관한 연구
김무현,강별,박설현 한국동력기계공학회 2022 동력시스템공학회지 Vol.26 No.6
In order to improve the reliability of optical-based PM concentration measurements, the optical properties of PM such as the dimensionless light extinction coefficient must be well defined. However, the optical properties of PM produced from burning coal are lacking. Therefore, in this study, the dimensionless light extinction coefficient measurements and optical characterization analysis of PM generated from burning bituminous coal at elevated reaction temperatures were performed. Bituminous coal in the form of powder was burned in a muffle furnace and PM released from flame was then collected on a quartz filter. Morphological investigations through the TEM images and elemental and organic carbon ratio analysis were performed to quantitatively investigate the optical properties of PM. Experimental results clearly indicate that increases in the reaction temperature can increase graphitic nature and morphological dimension (represented by an optical diameter) of PM, eventually enhancing the effects of absorption and scattering of the light and the measured dimensionless light extinction coefficient of PM.