관통성 손상에 의한 심장내 이물 - 수술 치험 1례 -

정진용 대한흉부심장혈관외과학회 1990 Journal of Chest Surgery (J Chest Surg) Vol.23 No.5

Violence in our society, combined with improving transport system, resulted in increased numbers of patients with cardiac wounds reaching the hospital alive. Most patients with penetrating cardiac injury, rather than blunt injury, present with a syndrome of either hemorrhagic shock or cardiac tamponade. And they should be operated upon as soon as possible. Often the atrioventricular valves and other important cardiac structures are also damaged by the penetrating instruments or missile. Both intracardiac communications and atrioventricular fistulas may result in significant left-to-right shunts accompanied by congestive heart failure, necessitating surgical correction. Usually, retained cardiac foreign bodies, which are almost always bullets or fragments of missiles, may lie within a cardiac chamber or in the myocardium. Emboli of bullets or other missiles from distant sites to the right side of the heart are numerous enough to require attention. Recently we experienced a case with intracardiac foreign body due to penetrating cardiac injury. A 19 year-old man was admitted to our hospital due to penetrating anterior chest wound by iron segment. The roentgenogram of the chest revealed a radio-opaque metallic shadow in left lower chest around the cardiac apex, mild blunting of left costophrenic space, but no cardiomegaly. During operation the foreign body was noted to be present in the cardiac chamber by the portable C-arm fluoroscopy. But during the manipulation it moved into left inferior pulmonary vein from left ventricle by way of left atrium. So we could manage to remove it from left inferior pulmonary vein by direct approach to the vein. It was iron segment, sized 0.lcm x0.6cmx0.5cm, with sharp margins. The patient had an uneventful postoperative recovery except for chylopericardium and was discharged.

아트리움에서 화재 발생시 복사가 고려된 연기거동에 대한 수치해석 연구

정진용,유홍선,홍기배 한국화재소방학회 2001 한국화재소방학회논문지 Vol.15 No.1

본 연구는 3차원 아트리움 공간(일본의 SIVANS 아트리움) 내에서 화재 발생시 복사가 고려된 연기의 거동을 알아보기 위해 자체개발한 SMEP(Smile Movement Estimating Program) field 모델을 사용하여 수치해석하였다. PISO 알고리즘과 부력항을 포함한 수정 k-ε 난류모델을 사용한 SMEP은 연속, 운동, 에너지, 농도 그리고 복사 열 전달 방정식을 풀었으며, 복사 열 전달 방정식의 해석을 위하여 S-N 구분종좌표법을 채택하여 사용하였다. 수치해석 결과 연기의 온도분포는 복사와 대류를 함께 고려했을 경우가 대류만을 고려했을 경우 보다 실험결과와 근사한 경향을 나타내었다. 이것은 연기속에 포함되어 있는 연소 생성물 중 H₂O와 CO₂가스의 복사 영향 때문이며, 따라서 좀더 실제적인 화재해석에 있어서 연기의 복사 영향을 고려하는 것이 필요하다. 또한 연층의 하강 속도는 약 0.1m/s이였으며 피난수준인 바탁 1.5m까지 연층이 도달하는데에는 560kW의 Ultra Fast Fire의 경우 약 450초의 시간이 걸렸다. This paper describes the smoke filling process of a fire field model based on a self-developed SMEP (Smoke Movement Estimating Program) code to the simulation of fire induced flows in the atrium solves (SIVANS atrium at Japan) containing smike radiation effect. The SMEP using PISO algorithm solves conservation equations for mass, momentum, energy and species, together with those for the modified k-ε turbulence model with buoyancy term. Also it solves the radiation equation using the discrete ordinates method. The result of the calculated smoke temperature containing radiation effect has shown a better prediction than the result calculated by only convection effect in comparison with the experimental data. This seems to come from the radiation erect of H₂O and CO₂gas under smoke productions. Thus, the consideration of the radiation effect under smoke in fire should be necessary in order to get more realistic result. Also the numerical resuls indicated that the the smoke layer is developing at a tare of about 0.1 m/s. It would take about 450 seconds after starting the ultra fast of 560kW that the smoke layer move down to 1.5m above the escape level.

Rhabdomyolysis Following Colonoscopy: A Case Repor

정진용,김갑태,김미진,김예정 대한대장항문학회 2018 Annals of Coloproctolgy Vol.34 No.1

We experienced a case of 1 patient who died from rhabdomyolysis-related complications after colonoscopy. A 60-year-old man had undergone an ‘uncomplicated’ colonoscopic polypectomy. Approximately 10 hours following this procedure, the patient complained of increasing left abdominal pain. His computed tomography image showed free gas, but his operative findings revealed no macroscopic perforation or abscess formation. Eight hours after the operation, the patient presented with myoglobulinuria, and we diagnosed the condition to be rhabdomyolysis. Based on this case, we recommend that rhabdomyolysis be added to the list of complications following a colonoscopic procedure. Moreover, for prevention and early treatment, endoscopists should be attentive to the risk factors and signs/symptoms of rhabdomyolysis.

절삭력 이동평균을 이용한 선삭가공의 공구마모 진단에 관한 연구

정진용,정석훈 한국기계기술학회 2012 한국기계기술학회 학술대회논문집 Vol.2012 No.1

경피적 농양 배액술에 의한 기종성 신우신염의 치료

정진용 대한영상의학회 1997 대한영상의학회지 Vol.36 No.2

Purpose : To assess the usefulness of percutaneous drainage of abscess in the treatment of emphysematous pyelonephritis. Materials and Methods : Ten cases of nine patients with emphysematous pyelonephritis were percutaneously drained. All were suffering from diabetes mellitus. The procedure was performed under fluoroscopic guidance in nine cases and US guidance in one case in which bilateral multiloculated abscesses were present in the perirenal spaces. The results were classified as cure, partial success, recurrence, or failure. The mean drainage period and complication were analyzed. Results : Eight cases were cured, and there was one case success. In one case, who had diffuse renal parenchymal destruction without perirenal fluid collection, the treatment failed. The longest drainage period was 45 days, in a case of re-insertion due to incidental catheter removal; the mean was 23 days. Bacteremia in one case was cured with antibiotic therapy which lasted two days. Conclusion : In diabetic patients, percutaneous drainage of obscess is throught to be a safe and effective method for the treatment of emphysematous pyelonephritis, and is one that does not involve diffuse destruction of renal parenchyma.

대규모 도시 맵핑을 위한 라이다 데이터 셋

정진용,조영근,신영식,김아영 제어로봇시스템학회 2018 제어로봇시스템학회 국내학술대회 논문집 Vol.2018 No.5

자궁경부암 환자에서 상하복신경총의 고주파 열응고술 치료경험 증례 보고

정진용,조성경,노운석,박찬홍,서귀주,이준석 대한통증학회 2004 The Korean Journal of Pain Vol.17 No.2

Superior hypogastric plexus block (SHGPB) with neurolytics, such as absolute alcohol or phenol, have been known to be highly effective in patients with pelvic cancer affected by somatic and segmental pain or by perineal pain. However, these neurolytics can cause direct tissue damage to occur by spread of the neurolytic solution to the surrounding area. In the case of a 59-year-old female, who has suffered from severe lower abdominal pain (VAS 9-10) due to the metastasis of cervical caner, SHGPB was successfully performed SHGPB using a percutaneous radiofrequency thermocoagulation method (less than VAS 3). It is suggested that SHGPB by radiofrequency thermocoagulation appears to be a safe and effective procedure for the management of lower abdominal pain related to malignancy, without the complication of neurolytics.

The Effect of Traditional Korean Medicine Treatment on CREST Syndrome: A Case Report

정진용,서현식,손창규,이남헌,조정효 대한한방내과학회 2017 大韓韓方內科學會誌 Vol.38 No.2

CREST syndrome is a form of limited cutaneous scleroderma that occurs only in certain parts of the body, such as the skin of the hands and face. CREST refers to the five main features of the syndrome: calcinosis, Raynaud’s phenomenon, esophageal dysmotility, sclerodactyly, and telangiectasia. Currently, there is no standard treatment for CREST syndrome, and there have been no studies of the use of traditional Korean medicine (TKM) for this disease. This study describes the effects of Keumsuyukun-jeon on CREST syndrome. The patient in this case had typical clinical symptoms of CREST syndrome. These symptoms improved within a relatively short period of receiving the TKM treatment. The results of Anti-centromere antibody (AI) and high sensitivity C-reactive protein (mg/L) also improved.

지하계단 화재에서 유동에 대한 실험연구

정진용,홍기배,이재하,유홍선 대한설비공학회 2003 설비공학 논문집 Vol.15 No.10

Reduced-scale experimental study was carried out on the heat flow behavior which flows under the sloped ceiling in underground fire. Temperature and flow velocity were measured to characterize the ceiling jet along the sloped stairway ceiling. The methanol fuel was used as a model fire source giving 2.2 and 3.4 kW, with changing the slope angle of stairway adopting of 15, 25, 35, and 45 deg. Based on the experimental data, excess temperature and velocity along the sloped stairway ceiling were examined which are usefully applicable to estimate the activating conditions of heat detector and sprinkler head mounted on the sloped ceiling. Excess temperature in upper exit of the sloped stairway was also examined to analyze the soffit which delays the smoke diffusion. The result shows that the activating conditions of heat detector and sprinkler in the sloped stairway ceiling have to be considered differently in a point of about 30 deg.

Effects of intraoperative continuous infusion of low dose remifentanil and intravenous bolus dose of fentanyl on postoperative pain

정진용,김종해,손상혁 대한마취통증의학회 2011 Anesthesia and pain medicine Vol.6 No.2

Background: The aim of this study was to evaluate whether continuous infusion of remifentanil during propofol anesthesia could produce opioid-induced hyperalgesia (OIH) and whether an intravenous bolus of fentanyl could control OIH in the management of postoperative pain. Methods: One hundred fifty-nine women undergoing gynecologic surgery were randomly divided into four groups. Group C: nitrous oxide and propofol infusion (3−4 μg/ml, n = 40), Group F: propofol infusion and intravenous bolus administration of fentanyl (1μg/kg)after suturing the peritoneum (n = 40), Group R: propofol and remifentanil infusion (2−4 ng/ml, n = 40) and Group RF: propofol,remifentanil infusion and intravenous bolus administration of fentanyl (n = 39). Patient controlled analgesia was started after the operation. The postoperative visual analog scale (VAS) was measured in the recovery room, then at 2 h, 6 h, 12 h, and 24 h after the operation. Results: The VAS scores for Groups R and F in the recovery room were lower than for group C (P < 0.05), but there were no differences 2 h after the operation. The VAS scores for Group RF 6 h and 12 h after the operation were higher than those for group C (P < 0.05). Conclusions: Our results suggest that low dose (2−4 ng/ml)continuous infusion of remifentanil during propofol anesthesia does not produce marked hyperalgesia. However, an intravenous bolus of fentanyl can aggravate OIH induced by remifentanil. (Anesth Pain Med 2011; 6: 138∼142)