• Title/Summary/Keyword: 풍선차단

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Endovascular Aortic Balloon Clamping for Various Heart Disease (대동맥 내 풍선 차단법을 이용한 여러 가지 심장수술)

  • Choi, Jin-Ho;Park, Pyo-Won
    • Journal of Chest Surgery
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    • v.41 no.1
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    • pp.61-67
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    • 2008
  • Background: Conventional ascending aortic cross clamping is often limited. This study was carried out to evaluate the safety and efficacy of an endovascular aortic clamping technique with an intraaortic balloon catheter. Material and Method: From April 2004 to January 2007, surgery with endoaortic clamping was performed in seven patients. A retrograde access perfusion (RAP) catheter was used in six patients and a Pruitt's balloon catheter in two patients. The indication for the operation was a retrosternal pseudoaneurysm of the aortic root in six patients, diffuse calcification of the ascending aorta with aortic regurgitation in 2 patients and an atrial septal defect in one patient. Five patients had at least two prior cardiac surgeries. Result: Successful insertion of the catheter and endoaortic clamping was achieved in all patients. Conclusion: The endovascular aortic clamping technique with a balloon catheter was a useful alternative method for patients in whom conventional cardiac surgery was limited.

A Study on Real-time Bloking System for the Voice Marketing Call (음성스팸 실시간 차단시스템에 관한 연구)

  • Park, Haeryong;Park, Yunsik;Seo, Hyejung;Bong, Kihwan
    • Proceedings of the Korea Information Processing Society Conference
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    • 2017.04a
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    • pp.203-206
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    • 2017
  • 최근 휴대전화 문자스팸 차단 강화로 인한 풍선효과로 휴대전화 음성스팸이 지속적으로 증가하고 있고, 2015년 3월부터는 음성스팸 건수가 문자스팸 건수를 역전해서 급속도로 증가하고 있어 효율적으로 음성스팸을 차단할 수 있는 시스템 구축의 필요성이 대두되고 있다. 이에, 음성스팸 신고번호와 음성스팸 가상 트랩(실제 존재하지 않는 가상의 휴대전화번호를 적용)을 통해 탐지된 내용을 기반으로 음성스팸 전화번호 차단리스트를 생성하고 이를 이통사에게 제공하여 일정기간 동안 음성호를 차단하는 음성스팸 실시간 차단시스템을 설계하고자 한다.

Comparison of Growth Characteristics of Tricholoma matsutake Mycelium Among the Types of Air Bubble Bioreactor (공기부양식 생물반응기의 형태별 송이균사의 생장특성 비교)

  • Lee, Wi-Young;Ahn, Jin-Kwon;Ka, Kang-Hyeon;Kwon, Young-Jin
    • The Korean Journal of Mycology
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    • v.31 no.2
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    • pp.89-93
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    • 2003
  • In order to select suitable bioreactor type inhibiting cell stress during submerged culture of Tricholoma matsutake mycelium, the growth characteristics and ergosterol contents were investigated using the external-loop type of air-lift bioreactor (ETAB), balloon type of air bubble bioreactor (BTBB) and column type of air bubble bioreactor (CTBB). Dry weights of the T. matsutake in the BTBB, ETAB and CTBB were 12 g, 11.4 g, and 9.5 g per 1 litter, respectively. BTBB, ETAB and CTBB reached stagnant phases 16, 20, and 24 days after cultivation, respectively, The BTBB was more suitable for liquid culture of T. matsutake mycelium compared to other bioreactors owing to much mycelia product and short culture period. The ergosterol contents produced by the mycelium in the bioreactors were in sequence of BTBB, CTBB, and ETAB at every growth phase. BTBB might affect the mycelium on producing the smallest size of pellets. BTBB and CTBB got the mycelium precipitated and coagulated under operation of bioreactor sparser, whereas ETAB shown no effect of above phenomenon. A renovated bioreactor combined between a balloon shape of BTBB and an external-loop of ETAB was developed to enhance the efficiency of culture technique.

Balloon Angioplasty in a Pediatric Renal Artery Occlusion (소아 신장 동맥 폐색에서의 풍선 혈관성형술)

  • Song, Hwayoung;Jung, Hye Doo;Kim, Jeong-Eun;Lee, Sang Min;Hong, Wonju;Lee, Kwanseop
    • Journal of the Korean Society of Radiology
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    • v.79 no.6
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    • pp.332-336
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    • 2018
  • Renal artery injury is a rare complication in blunt trauma, but can cause devascularization of the kidney, leading to renal failure. It requires early diagnosis and management. The treatment of renal artery injury still remains controversial, but recent studies have reported the successful treatment outcome with endovascular stent placement. Nevertheless, there is no standard treatment strategy in cases of pediatric patients. We report a case of a 16-year-old girl with right renal artery occlusion associated with a grade IV liver laceration. She was treated with only balloon angioplasty, and the kidney showed marked improvement of parenchymal perfusion with normalized renal function. Treatment with only balloon angioplasty can be a treatment option in pediatric patients with renal artery injury.

Study on Preventing Copyrights Infringement through Blocking Advertisements of Illegal Copyrighted Websites (불법 저작물 사이트의 광고 차단을 통한 저작권 침해 방지 연구 - 자금 추적 기반 방식을 중심으로)

  • Shin, Myeong-Seob;Yong, Mi-Ran;Lee, Yeong-Ju
    • The Journal of the Korea Contents Association
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    • v.20 no.7
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    • pp.331-341
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    • 2020
  • Recently the government has succeeded in shutting down the Illegal Copyrighted Websites by cracking down on the operators of the websites. But this only caused 'the Balloon Effect', similar websites were created and users shifted to the new websites. 'Follow the money' is drawing attention as a way to complement the effect of policies. It tracks the commercialization scheme and fund flows of the Illegal Copyrighted Websites and blocks the supply and publication of advertisements, which are the main source of revenue. This approach aims at self-closure of Illegal websites by blocking the revenue source. In this study, we have selected and analyzed overseas cases that adopted these measures. Many countries had different policies and campaigns, but three things are common: non-punishment measures, partnership based on voluntary participation, pursuing a variety of purposes other than protecting the copyright industry. In Korea, the reason public-private Partnerships was not properly established had been caused by the difference of views between them. Advertisers and agencies need to expand their awareness that illegal advertisements can have adverse effects such as brand image damage and enormous economic losses. Also campaigns and conferences related with the policy should be held to prevent copyright infringement through mutual understanding and cooperation.

Mechanical Behavior of Porcine Abdominal Organ Tissue with Resuscitative Endovascular Balloon Occlusion of the Aorta (혈관내 풍선 확장에 의한 대동맥 차단소생술이 적용된 돼지 복부 장기 조직의 기계적 거동 평가)

  • Wang, Il Jae;You, Ji-Hun;Huh, Up;Song, Seunghwan;Ahn, Hyo Young;Song, Chan-Hee;Lee, Chi-Seung;Ryu, Dong-Man
    • Korean Journal of Materials Research
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    • v.30 no.4
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    • pp.197-203
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    • 2020
  • Abdominal organs are the most vulnerable body parts under vehicle trauma, and there is high mortality from acute injuries in accidents. There are various ways to reduce this high mortality; one method is Resuscitative Endovascular Balloon Occlusion of the Aorta, which has recently become very popular as a minimally invasive alternative in the emergent management of patients with non-compressible hemorrhages below the diaphragm. However, high safety factor for patients is applied in actual clinical practice because there is no exact standard for the operating time. Therefore, in this study, the effects of the mechanical behavior of organ tissues for the duodenum, kidney, and liver on the operating time of Resuscitative Endovascular Balloon Occlusion of the Aorta is investigated in order to obtain data needed to establish standards of operating time. In characteristic analysis of organ tissues, uniaxial tensile test and compression test are conducted according to the operating time.

One Stage Repair of Berry Syndrome in a Neonate Using an Autologous Arterial Flap (신생아에서 Berry 증후군의 자가동맥 피판을 이용한 일차 완전교정술)

  • Park, Chin-Su;Sung, Si-Chan;Chang, Yoon-Hee;Lee, Hyoung-Doo;Son, Song-Su;Kim, Young-Kyu
    • Journal of Chest Surgery
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    • v.41 no.4
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    • pp.499-503
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    • 2008
  • Berry syndrome (a distal aortopulmonary window and a right pulmonary artery originating from the ascending aorta, an intact ventricular septum, a patent ductus arteriosus and an interrupted aortic arch) is a rare complex congenital cardiac malformation. We describe a case of one stage repair with using an autologous arterial flap in a 19-day-old neonate who was suffering with this malformation, and we report on the development of postoperative right pulmonary artery stenosis and its successful management with performing multiple balloon angioplasties.

Clinical Analysis of the Recent Results of Coronary Artery Bypass Grafting (관상동맥 우회술의 최근성적에 대한 임상적 고찰)

  • Han, Sung-Ho;Kim, Hyuck;Lee, Chul-Bum;Chung, Won-Sang;Jee, Heng-Ok;Kang, Jung-Ho;Kim, Young-Hak
    • Journal of Chest Surgery
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    • v.35 no.7
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    • pp.523-529
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    • 2002
  • Background: Previous reports present that the early results of coronary artery bypass grafting (CABG) has been improving with the accumulation of surgical experience. We conducted a retrospective analysis of the patients who received CABG to evaluate the recent results of CABG. Material and Method: Between January 1996 and August 2001, 154 patients underwent CABG at Hanyang University Hospital. There were 47 patients(group I) who were operated between 1996 and 1998, and 107 patients(group II) who were operated thereafter. The preoperative diagnosis, operative procedure, mortality, and complications were analyzed retrospectively. Result: There were 35 males and 12 females in group I, and 78 males and 29 females in group II, which shows similar ratio of sexes between the two groups. The average age of patients for group I and group II was $55.9{\pm}6.2$ years and $61.0{\pm}8.0$ years, respectively, showing a significant increase in group II(p<0.05). The average left ventricular ejection fraction(LVEF) for group I and group II was $54.6{\pm}11.8$% and $56.9{\pm}13.0$%, respectively. The number of patients who had previous MI in group I and group II were 13 patients(27.7%) and 14 patients(13.1%), respectively, which shows a significant difference (p<0.05). All procedures were performed using the cardiopulmonary bypass(CPB) and moderate systemic hypothermia. Myocardial protection was achieved using intermittent hypothermic ischemia under ventricular fibrillation state or cold crystalloid cardioplegic solution for most of group I patients, whereas cold blood cardioplegic solution was used for group II patients. The mean CPB times for group I and group II were $149.2{\pm}48.7$ minutes and $113.1{\pm}30.6$ minutes, respectively. The mean aortic cross clamp times for group I and group II were $81.3{\pm}26.5$ minutes $72.2{\pm}23.9$ minutes, respectively. These figures show that CPB and aortic cross clamp times were significantly reduced in group II(p<0.05). The use of the left internal thoracic artery(LITA) was increased from 42%(20/47) for group I to 81% (87/107) for group II. The mean number of grafts also significantly increased from $2.5{\pm}0.6$ for group I to $3.0{\pm}1.1$ for group II(p<0.05). Intra-aortic balloon pump(IABP) was applied in 7 cases in group I and 17 cases in group II. Of these, 28.6%(2/7) and 52.9%(9/17) were broadly applied preoperatively in patients with LVEF<40% or congestive heart failure. The operative mortalities for group I and II were 10.6%(5/47) and 0.9%(1/107), respectively, which shows significant decrease for group II(p.0.05). Conclusion: This report suggest that CABG using CPB can recently be performed more safely in virtue of the accumulation of surgical experience with reduction in CPB and aortic cross clamp times and improved surgical techniques and myocardial protection. And we think that the optimal treatment of patients with left ventricular dysfunction associated with congestive heart failure and the extended application of IABP, especially have contributed to the reduction of operative mortality and morbidity.

Inhibition of Neointima Formation and Migration of Vascular Smooth Muscle Cells by Anti-vascular Endothelial Growth Factor Receptor-1 (Flt-4) Peptide in Diabetic Rats (당뇨병 쥐에서 혈관내피 성장인자 수용체-1 차단 펩타이드를 이용한 신내막 형성과 혈관평활근세포 이동의 억제)

  • Jo, Min-Seop;Yoo, Ki-Dong;Park, Chan-Beom;Cho, Deog-Gon;Cho, Kue-Do;Jin, Ung;Moon, Kun-Woong;Kim, Chul-Min;Wang, Young-Pil;Lee, Sun-Hee
    • Journal of Chest Surgery
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    • v.40 no.4 s.273
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    • pp.264-272
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    • 2007
  • Background: Vascular endothelial growth factor (VEGF) plays an important role in angiogenesis, including stimulating the proliferation and migration of vascular smooth muscle cells (VSMCs). It has been known that diabetes is associated with accelerated cellular proliferation via VEGF, as compared to that under a normal glucose concentration. We investigated the effects of selective blockade of a VEGF receptor by using anti-Flt-1 peptide on the formation and hyperplasia of the neointima in balloon injured-carotid arteries of OLETF rats and also on the in vitro VSMCS' migration under high glucose conditions. Material and Method: The balloon-injury method was employed to induce neointima formation by VEGF. For f4 days beginning 2 days before the ballon injury, placebo or vascular endothelial growth factor receptor-1 (VEGFR-1) specific peptide (anti-Flt-1 peptide), was injected at a dose of 0.5mg/kg daily into the OLETF rats. At 14 days after balloon injury, the neointimal proliferation and vascular luminal stenosis were measured, and cellular proliferation was assessed by counting the proliferative cell nuclear antigen (PCNA) stained cells. To analyze the effect of VEGF and anti-Flt-1 peptide on the migration of VSMCs under a high glucose condition, transwell assay with a matrigel filter was performed. And finally, to determine the underlying mechanism of the effect of anti-Flt-1 peptide on the VEGF-induced VSMC migration in vitro, the expression of matrix metalloproteinase (MMP) was observed by performing reverse transcription-polymerase chain reaction (RT-PCR). Result: Both the neointimal area and luminal stenosis associated with neointimal proliferation were significantly decreased in the anti-Flt-1 peptide injected rats, ($0.15{\pm}0.04 mm^2$ and $ 36.03{\pm}3.78%$ compared to $0.24{\pm}0.03mm^2\;and\;61.85{\pm}5.11%$, respectively, in the placebo-injected rats (p<0.01, respectively). The ratio of PCNA(+) cells to the entire neointimal cells was also significantly decreased from $52.82{\pm}4.20%\;to\;38.11{\pm}6.89%$, by the injected anti-Flt-1 peptide (p<0.05). On the VSMC migration assay, anti-Flt-1 peptide significantly reduced the VEGF-induced VMSC migration by about 40% (p<0.01). Consistent with the effect of anti-Flt-1 peptide on VSMC migration, it also obviously attenuated the induction of the MMP-3 and MMP-9 mRNA expressions via VEGF in the VSMCS. Conclusion: Anti-Flt-1 peptide inhibits the formation and hyperplasia of the neointima in a balloon-injured carotid artery model of OLETF rats. Anti-Flt-1 peptide also inhibits the VSMCs' migration and the expressions of MMP-3 and MMP-9 mRNA induced by VEGF under a high glucose condition. Therefore, these results suggest that specific blockade of VEGFR-1 by anti-Flt-1 peptide may have therapeutic potential against the arterial stenosis of diabetes mellitus patients or that occurring under a high glucose condition.

Analysis of Risk Factors in Coronary Artery Bypass Surgery (관동맥우회술의 위험인자 분석)

  • 정태은;한승세
    • Journal of Chest Surgery
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    • v.31 no.11
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    • pp.1049-1055
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    • 1998
  • Background: Coronary artery bypass surgery is an important treatment for ischemic heart disease. Recently operative mortality and morbidity has decreased, however further improvement is necessary. Materials and methods: This study was designed to evaluate the risk of operative mortality and morbidity by retrospective method. From 1992 to 1997, eighty six patients underwent coronary artery bypass surgery. There were 61 males and 25 females aged 36~74 years(mean, 58.6). Fourteen patients(16%) had previous PTCA or stent insertion, 41 patients(48%) had unstable angina, and 45 patients(52%) had three vessel disease. Patients with low LV ejection fraction(<35%) were 7 cases and urgent or emergent operation were 10 cases. There were 6 cases of combined surgery which were mitral valve replacement(2 cases), aortic valve replacement(2 cases), ASD repair(1 case), and VSD repair(1 case). Average number of distal anastomosis was 3.5 per patient and average aortic cross clamp time was 115±38.3min. Preoperative risk factors were defined as follows: female, old age(>70 years), low body surface area(<1.5M2), PTCA or stent insertion history, hypercholesterolemia, smoking, hypertension, DM, COPD, urgent or emergent operation, left main disease, low LV ejection fraction(<35%), and combined surgery. Results: Operative mortality was 7cases(8%). As a postoperative morbidity, perioperative myocardial infarction was 6 cases, cerebrovascular accident 6 cases, reoperation for bleeding 5 cases, acute renal failure 4 cases, gastrointestinal complication 3 cases, and mediastinitis 3 cases. In the evaluation of operative risk factors, low body surface area, DM and low LV ejection fraction were found to be predictive risk factors of postoperative morbidity(p<0.05), and low ejection fraction was especially a risk factor of hospital mortality(p<0.05). Conclusions: In this study, low body surface area, DM and low LV ejection fraction were risk factors of postoperative morbidity and low ejection fraction was a risk factor of hospital mortality.

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