SiOC 매트(Mat)를 이용한 열전지용 전해질 격리판 제조 및 특성

임경훈,조광연,류도형,신동근,진은주,김현이,정해원,이홍림,Lim, Kyoung-Hoon,Cho, Kwang-Youn,Riu, Doh-Hyung,Shin, Dong-Geun,Jin, Eun-Ju,Kim, Hyoun-Ee,Cheong, Hae-Won,Lee, Hong-Lim 한국세라믹학회 2009 한국세라믹학회지 Vol.46 No.6

Ceramic fiber separator is the promising material for thermal battery system because it reduces the production cost and offers the potential to a new application compared to a pellet type electrolyte. The electrolyte separator for thermal battery should be easily handled and loaded a large amount of the molten lithium salt. Ceramic fibers were used as an electrolyte separator and the lithium based molten salts were infiltrated into the ceramic filters. Leakage of molten salt (several lithium salts) leads to short-circuit during the thermal battery operation. In this study, a uniform and fine SiOC mat with fibers ranging from 1 to 3 ${\mu}m$ was obtained by electrospinning of polycarbosilane and pyrolysis. The optimum spinning conditions for obtaining fine diameters of SiOC fiber were controlled by the solution composition and concentration, applied voltage and spinning rate, release rate by porosity. The pore structures of the ceramic filter and the melting properties of the lithium salts affected to the electrolyte loading and leakage. The importance of the fiber size and porosity and their control was discussed and the mechanical properties were also discussed.

외상성 출혈성 쇼크 환자에서 발생한 비 폐쇄성 장간막 허혈

임경훈 ( Kyoung Hoon Lim ),정희경 ( Hee Kyung Jung ),조자윤 ( Ja Yun Cho ),이상철 ( Sang Cjeol Lee ),박진영 ( Jin Young Park ) 대한외상학회 2014 大韓外傷學會誌 Vol.27 No.4

Non-occlusive mesenteric ischemia (NOMI) encompasses all forms of mesenteric ischemia with patent mesenteric arteries. NOMI is commonly caused by decreased cardiac output resulting in hypoperfusion of peripheral mesenteric arteries. We report a case of NOMI secondary to hemorrhagic shock and rhabdomyolysis due to trauma. A 42-year-old man presented to our trauma center following a pedestrian trauma. On arrival, he was drowsy and in a state of hemorrhagic shock. He was found to have multiple fractures, both lung contusion and urethral rupture. An initial physical examination and abdominal computed tomography (CT) scan revealed no evidence of intra-abdominal injury. High doses of catecholamine were administered for initial 3 days due to unstable vital sign. On day 25 of hospitalization, follow- up abdominal CT scan demonstrated that short segment of small bowel loop was dilated and bowel wall was not enhanced. During exploratory laparotomy, necrosis of the terminal ileum with intact mesentery was detected and ileocecectomy was performed. His postoperative course was uneventful and is under rehabilitation. [ J Trauma Inj 2014; 27: 204-7 ]

림프절 전이에 따른 조기위암의 예후

임경훈(Kyoung Hoon Lim),정호영(Ho Young Chung),유완식(Wansik Yu) 대한외과학회 2003 Annals of Surgical Treatment and Research(ASRT) Vol.65 No.1

전해질 분리판용 세라믹 부직포와 리튬염간의 반응성

조광연,류도형,신동근,임경훈,진은주,김현이,하상현,최종화,Cho, Kwang-Youn,Riu, Doh-Hyung,Shin, Dong-Geun,Lim, Kyoung-Hoon,Jin, Eun-Ju,Kim, Hyoun-Ee,Ha, Sang-Hyeon,Choi, Jong-Hwa 한국세라믹학회 2009 한국세라믹학회지 Vol.46 No.6

Lithium salt have been used mainly as electrolyte of thermal battery for electricity storage. Recently, The 3phase lithium salt(LiCl-LiF-LiBr) is tried to use as electrolyte of thermal battery for high electric power. It is reported that LiCl-LiF-LiBr salt have high ion mobility due to its high lithium ion concentration. Solid lithium salt is melt to liquid state at above $500{^{\circ}C}$. The lithium ion is easily reacted with support materials. Because the melted lithium ion has small ion size and high ion mobility. For the increasing mechanical strength of electrolyte pellet, the research was started to apply ceramic filter to support of electrolyte. In this study, authors used SiOC web and glass fiber filter as ceramic mat for support of electrolyte and impregnated LiCl-LiF-LiBr salt into ceramic mat at above $500{^{\circ}C}$. The fabricated electrolyte using ceramic mat was washed with distilled water for removing lithium salt on ceramic mat. The washed ceramic mat was observed for lithium ion reaction behavior with XRD, SEM-EDS and so on.

외상성 십이지장 손상의 치료 성적

유병혁 ( Byung Hyuk Yu ),조자윤 ( Ja Yun Cho ),임경훈 ( Kyoung Hoon Lim ),박진영 ( Jin Young Park ) 대한외상학회 2015 大韓外傷學會誌 Vol.28 No.3

Purpose: The purpose of this study is to evaluate the surgical outcome of duodenal injuries and to analyze the risk factors related to the leakage after surgical treatment. Methods: A retrospective review of 31 patients with duodenal injuries who managed by surgical treatment was conducted from December 2000 to May 2014. The demographic characteristics, injury mechanism, site of duodenal injury, association of intraabdominal organ injuries, injury severity score (ISS), abdominal abbreviated injury scale (AIS), injury-operation time lag, surgical treatment methods, complications, and mortality were reviewed. Results: Duodenal injury was more common in male. Twenty four (77.4%) patients were injured by blunt trauma. The most common injury site was in the second portion of the duodenum (n=19, 58.6%). Fourteen patients (45.2%) had other associated intraabdominal organ injuries. The mean ISS is 13.6±9.6. The mean AIS is 8.9±6.5. Eighteen patients (58.1%) were treated by primary closure. The remaining 13 patients underwent various operations, including exploratory laparotomy (n=4), pancreaticoduodenectomy (n=3), pyloric exclusion (n=3), Resection with end-to-end anastomosis (n=2), and duodenojejunostomy (n=1). Most common postoperative complications were intraabdominal abscess (n=9) and renal failure (n=9). Mortality rate was 9.7%. Conclusion: ISS, AIS>10, operative time, pancreaticoduodenectomy, sepsis, and renal failure are significant predictors of a postoperative leak after duodenal injury. Careful management is needed to prevent a potential leak in patient with these findings. [ J Trauma Inj 2015; 28: 129-133 ]

다발성 외상환자에서 혈관계 접근을 통해 치료한 쇄골하동맥 손상 2례

조자윤 ( Ja Yun Cho ),정희경 ( Hee Kyung Jung ),김형기 ( Hyung Kee Kim ),임경훈 ( Kyoung Hoon Lim ),박진영 ( Jin Young Park ),허승 ( Seung Huh ) 대한외상학회 2013 大韓外傷學會誌 Vol.26 No.3

Introduction: Surgical treatment of subclavian artery (SA) injury is challenging because approaching the lesion directly and clamping the proximal artery is difficult. This can be overcome by using an endovascular technique. Case 1: A 37-year-old male was drawn into the concrete mixer truck. He had a right SA injury with multiple traumatic injuries: an open fracture of the right leg with posterior tibial artery (PTA) injury, a right hemothorax, and fractures of the clavicle, scapula, ribs, cervical spine and nasal bone. The injury severity score (ISS) was 27. Computed tomography (CT) showed a 30-mm-length thrombotic occlusion in the right SA, which was 15 mm distal to the vertebral artery (VA). A self-expandable stent(8 mm×40 mm in size) was deployed through the right femoral artery while preserving VA flow, and the radial pulse was palpable after deployment. Other operations were performed sequentially. He had a viable right arm during a 13-month follow-up period. Case 2: A 25-year-old male was admitted to our hospital due to a motorcycle accident. The ISS was 34 because of a hemothorax and open fractures of the mandible and the left hand. Intraoperative angiography was done through a right femoral artery puncture. Contrast extravasation of the SA was detected just outside the left rib cage. After balloon catheter had been inflated just proximal to the bleeding site, direct surgical exploration was performed through infraclavicular skin incision. The transected SA was identified, and an interposition graft was performed using a saphenous vein graft. Other operations were performed sequentially. He had a viable left arm during a 15-month follow-up period. Conclusion: The challenge of repairing an SA injury can be overcome by using an endovascular approach.

대장암의 근치적 절제술 후 발생한 복막 재발의 위험 인자

강병모(Byung Mo Kang),최규석(Gyu Seog Choi),임경훈(Kyoung Hoon Lim),박인자(In Ja Park),전수한(Soo Han Jun) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.79 No.5

Purpose: Peritoneal recurrence after curative resection of colorectal cancer has been considered to be a lethal condition and to be suitable for palliative chemotherapy. Recently, aggressive approaches such as cytoreductive surgery and perioperative intraperitoneal chemotherapy were introduced for peritoneal malignancies to improve survival. The aim of this study is to identify the risk factors of peritoneal recurrence after curative resection of colorectal cancer and to determine the indication of early postoperative intraperitoneal chemotherapy (EPIC). Methods: From January 1997 to December 2007, a total of 2,320 patients’ records with curative resection for colorectal cancer were collected through the prospective colorectal cancer registry protocol in Kyungpook National University Hospital, Korea. Of those, a total of 1,929 patients were included for analysis of the relationship between perioperative clinicopathologic variables and peritoneal recurrence. Results: The study group was composed of 1,086 men and 843 women with a mean age of 61.1. In multivariate analysis, preoperative level of serum CA19-9>37 U/㎖ (odd ratio [OR] 3.217; 95% confidence interval [95% CI] 1.525∼6.788), right colon cancer (OR 2.524; 95% CI 1.158∼5.502), pT4 tumor (OR 2.131; 95% CI 1.009∼4.502) and positive apical lymph node (OR 3.045; 95% CI 1.023∼9.066) were independent risk factors of peritoneal recurrence after curative resection of colorectal cancer. Conclusion: In colorectal cancer patients with increased preoperative serum levels of CA19-9, right-sided location, serosal exposure or invasion of adjacent organ, and positive apical lymph node, more scrupulous surveillance for peritoneal recurrence was necessary during the postoperative follow-up period. In selective patients with risk factors of peritoneal recurrence, more aggressive strategies for management, such as EPIC, were able to be considered under the acceptable general condition and life-expectancy.

외상 후 지연성으로 발생한 장간막 동정맥루: 증례보고

조자윤 ( Jayun Cho ),정희경 ( Hee Kyung Jung ),김형기 ( Hyung Kee Kim ),임경훈 ( Kyoung Hoon Lim ),천재민 ( Jae Min Chun ),허승 ( Seung Huh ),박진영 ( Jin Young Park ) 대한외상학회 2013 大韓外傷學會誌 Vol.26 No.3

Introduction: A post-traumatic mesenteric arteriovenous fistula (AVF) is extremely rare. Case Report: A previously healthy 26-year-old male was injured with an abdominal stab wound. Computed tomography (CT) showed liver injury, pancreas injury and a retropancreatic hematoma. We performed the hemostasis of the bleeding due to the liver injury, a distal pancreatectomy with splenectomy and evacuation of the retropancreatic hematoma. On the 5th postoperative day, an abdominal bruit and thrill was detected. CT and angiography showed an AVF between the superior mesenteric artery (SMA) and the inferior mesenteric vein with early enhancement of the portal vein (PV). The point of the AVF was about 4 cm from the SMA`s orifice. After an emergent laparotomy and inframesocolic approach, the isolation of the SMA was performed by dissection and ligation of adjacent mesenteric tissues which was about 6 cm length from the nearby SMA orifice, preserving the major side branches of the SMA, because the exact point of the AVF could not be identified despite the shunt flow in the PV being audible during an intraoperative hand-held Doppler-shift measurement. After that, the shunt flow could not be detected by using an intraoperative hand-held Doppler-shift measuring device. CT two and a half months later showed no AVF. There were no major complications during a 19-month followup period. Conclusion: Early management of a post-traumatic mesenteric AVF is essential to avoid complications such as hemorrhage, congestive heart failure and portal hypertension.