급성요관산통을 주소로 응급실로 내원한 환자에서 hydromorphone과 pethidine 의 치료효과 비교를 위한 무작위배당 연구

최욱진,김원영,손창환,유정민,서동우,이재호,이윤선,오범진,김원,임경수 대한응급의학회 2011 대한응급의학회지 Vol.22 No.2

Purpose: To compare the efficacies and side effects of intravenous hydromorphone and pethidine in the emergency department (ED) treatment of ureteral colic. Methods: A prospective, controlled, randomized clinical trial was conducted in a university-affiliated tertiary referral center. All adult patients who presented to the ED with severe ureteral colic were included. The patients received either 1 mg of hydromorphone (n=26) or 50 mg of pethidine (n=26) intravenously. Pain intensity was determined using a 10 cm visual analogue scale 0, 15, 30, and 120 minutes after injection. Results: Dermographic characteristics and baseline pain scores of both groups were comparable (p>0.05). The pain intensity level for the hydromorphone group was lower than for the pethidine group at 15, 30, and 120 minutes. Pain relief was better with hydromorphone at 15 minutes (p<0.05). Side effects of the two groups were not statistically significant. Conclusion: The ureteral colic patients receiving hydromorphone achieved more pain relief. The side effects were similar for either treatment. Hydromorphone should be the preferred agent in suspected ureteral colic, when an opioid analgesic is to be used.

다발성 장기 기능이상과 전격성 폐렴을 동반한 운동유발성 열사병 증례 1례

최욱진,이재욱,이세원 대한응급의학회 2009 대한응급의학회지 Vol.20 No.4

Heat stroke is defined as a core body temperature that rises above 40C accompanied by central nervous system abnormalities such delirium, convulsions or coma. Despite treatment with optimal cooling, heat stroke causes deaths by complications including rhabdomyolysis, renal failure, hepatic dysfunction, disseminated intravascular coagulation syndrome, acute respiratory distress syndrome, bowel ischemia, myocardial injury, and multiple organ failure. In some cases of survival, heat stroke it can cause irreversible CNS damage. Therefore, if exertional heat stroke is properly diagnosed in the emergency room, we must initiate early and aggressive treatment in order to prevent the multiorgan failure and high mortality associated with this condition. To our knowledge, case reports in the literature are rare describing that patients with multiple organ dysfunction and fulminant pneumonia following exertional heat stroke. This study reports on a relevant case, as well as findings from the literature. The case history is presented of a 20- year-old man who presented with exertional heat stroke with sustained hyperpyrexia ongoing after the first day of admission despite optimal treatment including intensive fluid resuscitation. On the 3rd day of admission, chest infiltrated lesions were discovered. From the high-resolution computed tomography results, multifocal consolidations were discovered in both lungs. Blood cultures revealed Staphylococcus hominis. Treatment with proper antibiotics was begun after identifying the blood culture. The patient fully recovered and was discharged on the 10th day after admission.

보건교사의 응급의료체계 인식과 활용 실태

최욱진,Choi, Uk-Jin 사단법인 한국응급구조학회 2008 한국응급구조학회지 Vol.12 No.2

Purpose : This study aims to provide basic data to establish an effective emergency medical service system by analyzing health educator' understanding and use of emergency medical service system at schools. Method : 93 questionnaires from 200 elementary, middle and high school nurses in the city D were collected from May 26 to July 7, 2008 and ${\chi}^2$ analysis and frequency analysis were carried out with SPSS win PC 14.0. Results : 1. As for emergency contact points, 3(3.30%) answers 'they do not have any knowledge', 40(43.96%) said 'they have some idea' and 48(52.75%) said 'they do know about it'. Among 24 respondents who have less than five years of working experience, 2(8.33%), 16(66.67%) and 6(25.00%) answered 'have no knowledge', 'a little knowledge' and 'clear knowledge on it' respectively. As for 9 who have 6-10 years of career, 1(12.50%), 4(50.00%) and 3(37.50%) answered 'have no knowledge', 'a little knowledge' and 'clear knowledge on it' respectively. Among 32 respondents who have 11~20 years, there were no respondents with no knowledge on the given question, and 9(29.03%) said they have some understanding and 22(70.97%) answered they have clear understanding on the topic. From this result, it can be said that there is statistically meaningful differences among different working year groups with ${\chi}^2=16.583$ and p= .010. 2. As for 119 emergency contact in the given district, 24(29.63%), 30(37.04%) and 27 (33.33%) answered 'do not know', 'know' and 'know very well' respectively. As for the question to ask whether they know Emergency Medical Information Center 1339, 66(70.97%) answered 'Yes' and 27(29.03%) answered 'No'. When it comes to emergency contact numbers and list of hospitals, 59(63.44%) said 'they have some list', 20(21.51%) answered 'they have well established contact network' and 14(15.05%) said 'they have none'. 3. As for the use of 119 service at the time of emergency at schools, 59(63.44%), said 'Yes' and 12(12.90%) answered 'No'. Among those who said 'yes', 29(31.18%), 24(25.81%) and 5(5.38%) answered they have used the service 1-2, 3-5 and 6-10 times respectively. Conclusion : In order to ensure health educator to effectively deal with emergency situations at schools, there should be special activities to enhance health educator' understanding on 119 and Emergency Medical Information Center 1339 and at the same time, a system should be established to connect schools, 119 in a given district, hospitals and Emergency Medical Information Center 1339.

KR60 레일의 미세조직과 기계적 물성 평가

최욱진,조희재,윤경민,민경환,임남형,이수열,Choi, Wookjin,Cho, Hui Jae,Yun, Kyung-Min,Min, Kyung-Hwan,Lim, Nam-Hyoung,Lee, Soo Yeol 한국재료학회 2017 한국재료학회지 Vol.27 No.12

The use of continuous welded rail is increasing because of its many advantages, including vibration reduction, enhanced driving stability, and maintenance cost savings. In this work, two different types of continuous welded rails were examined to determine the influence of repeated wheel-rail contact on the crystal structure, microstructure and mechanical properties of the rails. The crystal structure was determined by x-ray diffraction, and the microstructure was examined using optical microscopy and scanning electron microscopy. Tensile and microhardness tests were conducted to examine the mechanical behaviors of prepared specimens taken from different positions in the cross section of both newly manufactured rail and worn rail. Analysis revealed that both the new and worn rail had a mixed microstructure consisting of ferrite and pearlite. The specimens from the top position of each rail exhibited decreased lamella spacing of the pearlite and increased yield strength, ultimate tensile strength and hardness, as compared with those from other positions of the rail. It is thought that the enhanced mechanical property on the top position of the worn rail might be explained by a mixed effect resulting from a directional microstructure, the decreased lamella spacing of pearlite, and work hardening by the repeated wheel-rail contact stress.

하수 2차처리 방류수의 총인 고효율 처리를 위한 응집·막분리 혼성처리

최욱진,이병하,박준홍,차호영,이병찬,송경근 대한상하수도학회 2018 상하수도학회지 Vol.32 No.1

This study investigated phosphorus removal from secondary treated effluent using coagulation-membrane separation hybrid treatment to satisfy strict regulation in wastewater treatment. The membrane separation process was used to remove suspended phosphorus particles after coagulation/settlement. Membrane separation with 0.2 μm pore size of micro filtration membrane could reduce phosphorus concentration to 0.02 mg P/L after coagulation with 1 mg Al/L dose of polyaluminum chloride (PACl). Regardless of coagulant, the residual concentration of phosphorus decreased as the dose increased from 1.5 to 3.5 mg Al/L, while the target concentration of 0.05 mg P/L or less was achieved at 2.5 mg Al/L for the aluminum sulfate (Alum) and 3.5 mg Al/L for PACl. Moreover, alum showed better membrane flux as make bigger particles than PACl. Alum showed a 40% of flux decrease at 2.5 mg Al/L dose, while PACl indicated a 50% decrease of membrane flux even with a higher dose of 3.5 mg Al/L. Thus, alum was more effective coagulant than PACl considering phosphorus removal and membrane flux as well as its dose. Consequently, the coagulation-membrane separation hybrid treatment could be mitigate regulation on phosphorus removal as unsettleable phosphorus particles were effectively removed by membrane after coagulation.

Clinical guidance for point-of-care ultrasound in the emergency and critical care areas

최욱진 대한응급의학회 2022 대한응급의학회 학술대회초록집 Vol.2022 No.1

두부규격방사선사진에서 정상 sella turcica의 형태 및 크기에 관한 연구

최욱진,황의환,이상래 대한구강악안면방사선학회 2001 Imaging Science in Dentistry Vol.31 No.1

Purpose : To investigate the shape and size of normal sella turcica on cephalometric radiograms. Materials and Methods : Cephalometric radiograms of 200 orthodontic patients of age ranging 6-42 years were examined. All subjects were divided into 5 groups by age, the dimensional change of sella turcica was examined according to age, and the configurations of sella turcica floor, tuberculum sella, and anterior and posterior clinoid process were also observed. Results : The contours of sella turcica floor were flat type in 54% and concave type in 46%. The contours of tuberculum sella were right angle type in 55% and obtuse angle type in 44%; Acute angle type and plane type were very rare comprising 0.5%, 0.5% each. The configurations of anterior clinoid process were point type in 80% and round type In 20% of cases, and those of posterior clinoid processes were point type in 60% and round type in 40% of cases. The dimensional change of sella turcica according to age range had significantly positive linear trend to sella turcica length, height, and width until 25 years. After 26 years, no significant increase was found in sella turcica dimension. Especially, the sella turcica length had more proportional increase than that of sella turcica height and width. Conclusion : The results of this study revealed that the configuration of normal sella turcica was variable and the dimensional change of normal sella turcica had a linear tendency with age until 26 years.(Korean J Oral Maxillofac Radiol 2001;31:43-9)

미세조류를 이용한 가축분뇨 혐기소화액 액비 처리시스템 운전 및 연구

최욱진,채아나,강광남,정헌회,송경근 대한환경공학회 2015 대한환경공학회 학술발표논문집 Vol.2015 No.10

Microstructure and Mechanical Properties of Continuous Welded 50N Rail

최욱진,송민지,임남형,이수열 대한금속·재료학회 2019 대한금속·재료학회지 Vol.57 No.12

Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured headhardened rail, and worn (used) rail) were compared to examine the effects of heat treatment and repeated wheel-rail contact stress on the microstructure and mechanical behavior of continuous welded rail. The crystal structure, constituent phase distribution, tensile property, and hardness were investigated at various locations along a cross section of the rails. All three rails consisted of a mixture of BCC and FCC crystal structures as a majority phase with a very small amount of cementite (Fe3C) as a minor phase. Rietveld analysis revealed that the weighted fractions of the BCC crystal structure were approximately 74%, 64%, and 85% for the new rail, head-hardened rail, and worn rail, respectively. While the web and foot areas of the three rails showed no significant differences in mechanical properties, the railheads of the three rails revealed much higher yield strength, tensile strength, and hardness. The highest tensile strength and hardness were measured at the railhead in the head-hardened rail, and were attributed to the evolution of the bainite phase, generated by additional heat treatment. The higher mechanical strength of the railhead of the worn rail is thought to have resulted from a combination of work hardening and smaller lamellar spacing of the pearlite phase, induced by repeated wear processes during train operation.

아산지역 2~5세기 고대유적의 현황과 의미

최욱진 한국고대학회 2018 先史와 古代 Vol.- No.55

The indigenous forces located in Tangjeong(湯井) area grew from the 2nd century based on the geographical location favorable to the inflow of advanced artifacts. In the third century, it became one of the main forces of Mahan as well as the central forces in Asan through the possession of goods through exchanges and the acceptance of new weapons. This force can be presumed to be Mahan's prime town(國邑) and the country of Mokzi (目支國) The country of Mokzi was transformed into an attack by Baekje(百濟) at the end of the 3rd century, and the indigenous forces located in the Baebang(排芳) area became the central force of Asan through the relationship with Baekje in the 4th century. However, the indigenous forces located in the Baebang area unlike other powers in the surrounding area, there was no mutual relationship based on Baekje's prestige goods(威勢 品). This is because Baekje recognized Asan asan as their province and emphasized the relationship with other forces in the surrounding area. For this reason, Baekje did not establish mutual relations with the indigenous forces located in the Baebang area through Baekje's prestige goods, It is estimated that Baekje's prestige goods were not confirmed in Asan area. 아산지역의 탕정지역에 위치한 토착세력은 새로운 선진문물의 유입에 유리한 지리적 위치를 토대로 2세기부터 성장하였고 3세기에 이르러 교류를 통한 물품의 소유, 새로운 무기의 수용, 다수의 장신구 소유 등을 통해 주변세력에 비해 상대적으로 큰 분묘를 조성하면서 아산지역 내 중심세력이자 마한 주요 세력의 하나로 발전하였다. 이 세력은 관련기록과의 비교 검토를 통해 백제에서 인식한 마한의 국읍으로 『삼국지』 내 마한의 목지국으로 추정할 수 있었다. 목지국은 3세기 말이후 백제에 의한 공격으로 변화하였고 아산지역 내 세력의 중심은 배방을 중심으로 전개되었다. 배방을 중심으로 한 세력은 4세기에 이르러 백제와의 관계 속에 아산지역 내 중심세력으로 부상하게 되었지만, 주변지역의 다른 세력과 달리 백제와 위세품을 매개로 한 상호적 관계가 이루어지지 않았다. 이는 백제의 목지국 병합과 대두성 및 탕정성 축성에서와 같이 아산지역 내 세력들을장악하면서 지방으로 인식하였고 마한의 중심지였던 상징성을 감안하여 아산지역이 아닌 다른 주변지역과의 관계를 중시하면서 위세품의 사여를 통한 상호관계를 맺지 않았던 백제의 의도에따라 나타난 결과였다. 이러한 이유로 백제는 주변의 다른 세력과 달리 배방세력과는 위세품을매개로 한 상호적 관계를 이루지 않았고 아산지역 내에서 백제의 착장용 위세품 등이 확인되지 않았던 것으로 보인다.