• Journal of Korean Neurosurgical Society
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• 제39권6호
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• pp.438-442
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• 2006

The sylvian aqueduct syndrome is a global rostral midbrain dysfunction induced by a transtentorial pressure gradient through the aquaeductus. Several months after ventriculoperitoneal shunt, a patient with hydrocephalus began experiencing a constellation of midbrain dysfunction symptoms, including bradykinesia, medial longitudinal fasciculus syndrome, third nerve palsy, and mutism. These were indicative of cerebral aqueduct syndrome. In addition, the patient showed posture-dependent underdrainage or overdrainage. All symptoms were resolved after distal catheter elongation and floating cranioplasty. We present a case of reversible parkinsonism, which developed in a patient with shunted hydrocephalus and aqueductal stenosis, and discuss the diagnosis and treatment of the sylvian aqueduct syndrome. We also review the literature to address problems of drainage and potential treatment modalities.

• Journal of Korean Neurosurgical Society
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• 제30권7호
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• pp.939-942
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• 2001

Thirty nine-year-old man who required urgent shunt operation due to rapidly deteriorating visual acuity suffered from ventriculitis after aneurysmal operation. Daily dose of 20mg of vancomycin and amikyn were given intraventricularly via external ventricular catheter after failure of various kinds of systemic antibiotics. The exit of the catheter was made on the upper chest wall to prevent superinfection. External ventricular drainage could finally be switched to ventriculo-peritoneal shunt and he was discharged with clinical improvement.

• 대한정형도수물리치료학회지
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• 제22권2호
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• pp.35-39
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• 2016

Background: The superficial lymphatic system is divided into areas called lymphatic territories which are separated by watersheds. When the lymphatic system fails to remove its load either due to surgery, radiotherapy or some congenital malformation of it then the fluid and the proteins and wastes contained within it accumulates in that territory. Anastomotic connections exist across the watersheds and while they can work unaided manual lymph drainage (MLD) can significantly help drainage across them into unaffected lymphatic territories. The purpose of the study is to examine the effectiveness of a manual technique in moving fluids and softening hardened tissues using a tape measure and Patient-Specific Functional Scale. Methods: We examined the movement of fluids from the affected limbs of lymphedema patients who underwent a standardized 30-min treatment using the Dr. Vodder method of MLD. We chose a typical cross section of patients with secondary leg or secondary arm lymphedema. The lymphedema patient was also measured after the conclusion of treatment and underwent a follow-up control measurement, within 8 weeks. Both evaluation tools indicated a movement of fluid to different and unblocked lymphatic territories as well as a softening of tissues in some of the affected limbs. Results: MLD is an effective means of fluid clearance when it accumulates as a consequence of a failure of the lymphatic system. It seems likely that MLD has a systemic effect on the lymphatic system and that it can improve flow from otherwise normal tissues. Conclusions: It is hypothesized that a series of treatments would result in even more significant improvements.

• Journal of Korean Neurosurgical Society
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• 제56권3호
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• pp.243-247
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• 2014

Objective : To analyze the clinical data and surgical results from symptomatic chronic subdural hematoma (CSDH) patients who underwent burr-hole drainage (BHD) at the maximal thickness area and twist-drill craniostomy (TDC) at the precoronal point. Methods : We analyzed data from 65 symptomatic CSDH patients who underwent TDC at the pre-coronal point or BHD at the maximal thickness area. For TDC, we defined the pre-coronal point to be 1 cm anterior to the coronal suture at the level of the superior temporal line. TDC was performed in patients with CSDH that extended beyond the coronal suture, as confirmed by preoperative CT scans. Medical records, radiological findings, and clinical performance were reviewed and analyzed. Results : Of the 65 CSDH patients, 13/17 (76.4%) with BHD and 42/48 (87.5%) with TDC showed improved clinical performance and radiological findings after surgery. Catheter failure was seen in 1/48 (2.4%) cases of TDC. Five patients (29.4%) in the BHD group and four patients (8.33%) in the TDC group underwent reoperations due to remaining hematomas, and they improved with a second operation, BHD or TDC. Conclusion : Both BHD at the maximal thickness area and TDC at the pre-coronal point are safe and effective drainage methods for symptomatic CSDHs with reasonable indications.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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• pp.224-225
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• 2005

The lightness of components required on marine and shipbuilding industry is requiring high strength of components. In particular, fatigue failure phenomena, which happen in metal, bring on danger in human life and property. Therefore, antifatigue failure technology takes an important part of current industries. In this study, it was investigated about endurance and fatigue crack propagation rate of according to stress ratio of SMAW commonly using for welding structures in present. Fatigue crack propagation rate(da/dN) of low load(R=0.1) was lower than of high load(R=0.6) for piping weld. And in stage I, ${\Delta}$Kth, the threshold stress intensity factor of the weld under heavy load is higher than under small load. Fatigue life shows more improvement in the weld of stress ratio R=0.l than in the weld of stress ratio R=0.6.

• 한국지반환경공학회 논문집
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• 제15권2호
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• pp.59-66
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• 2014

본 논문에서는 석션파일의 인발거동을 조사하기 위해 유한차분법 상용 프로그램인 FLAC3D를 이용하여 수치해석을 수행하였다. 석션파일의 인발지지력을 전통적인 지지력 식을 이용하여 구하고, 이 값을 파일의 직경, 길이, 그리고 주변 점토의 비배수 전단강도를 변수로 하는 수치해석을 통한 해석 값과 비교하였다. 총 24개의 수치해석 결과를 바탕으로 석션파일의 인발파괴는 석션파일의 배수조건뿐만 아니라 파일의 제원과 주변 지반의 물성값에 의해 형태가 결정되는 것으로 밝혀졌다. 수치해석 결과로부터 석션파일 내부 주면에 발현되는 전단응력을 구하여 활동파괴와 인장파괴 중 어떤 파괴가 발생할 것인지를 결정하는데 사용하였다. 외부주면의 전단응력과 관계없이 높은 내부 전단응력을 얻은 경우 수치해석 내에서 활동파괴가 발생하는 경우가 많았으며, 이는 전통적인 지지력 공식으로부터 얻은 예측과 잘 맞았다.

• 한국지반공학회논문집
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• 제22권9호
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• pp.61-68
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• 2006

최근 대규모 토목 건설 프로젝트는 용지 매입비용 및 각종 민원으로 인하여, 공유수면을 매립하거나 해안 및 하천지역의 용지를 활용하고 있다. 공유수면을 매립한 지반이나 해안 및 하천 지역의 지반은 충분한 지지력을 발휘하지 못하는 연약지반이 대부분이다. 이러한 연약지반은 주로 점토나 실트와 같은 미세한 입자의 흙이나 간극이 큰 유기질토 또는 이탄, 느슨한 모래 등으로 이루어진 토층으로 구성되어 있으며, 지하수위가 높기 때문에, 제체 및 구조물의 안정과 침하 문제를 발생시킬 수 있다. 본 연구에서는 지오컴포지트의 수리특성을 평가하기 위해 상재하중에 따른 통수성과 전수성 실내시험을 수행하였으며, 지하수위가 높은 지반에 지하구조물을 축조할 경우 발생될 수 있는 지하수 누수 및 양압력을 제거하기 위하여 토목섬유를 적용한 배수시스템을 연구하였다. 지반의 조건상 양압력으로 인한 문제점이 많이 발생되는 매립지의 준설토를 이용하여 실내배수실험을 수행하였다. 실내 배수실험에서는 실험기 하부에 토목섬유 배수층을 설치한 후에 상부에 준설토를 다져 넣고 상부에서 단계별 수압을 가하여 배수량과 간극수압을 측정하여 각각의 수압에 따른 계측값들과 이론적인 값들과 비교하였다. 실내배수실험의 타당성을 분석하기 위하여 흙이나 암석과 같은 다공질 재료의 간극수압 분포나 이동을 해석하기 위한 2차원 유한요소 해석프로그램을 이용하여 수치해석을 수행하여 실내실험의 결과와 비교하였다.

• Journal of Chest Surgery
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• 제25권1호
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• pp.96-104
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• 1992

The 242 patients were operated due to chronic empyema in Hanyang University Hospital From Jan, 1983 to Aug, 1991, we operated 17 patients by modified.Schede`s thoracoplasty with myoplasty and we concluded to next scentences. 1. The age of patients were varied from 28 to 65[Average 39.1] and male preponderance was seen[more than 3 times]. 2. The preoperative cause of disease were tuberculosis in 14 patients[3 patients were associated with aspergillosis, and 1 patient was associated vrith actinomycosis], lung abscess in 2 patients, and haemophilia in 1 patient. 3. The Preoperative duration of empyema were varied from 1 month to 30 years[Average 49.8 month], and the duration from pulmonary resection to thoracoplasty were 1 month to 13.5 years[Average 55 month] except 3 patients, who were operated pneunectomy with thoracoplasty at the same time. 4. The total number of thoracoplasty were 19, because in 2 patients, we operated 2 steps, and we failed in 6 cases, so the success rate was 68.5%. 5. In failure analysis of 6 cases, the cause were obliteration failure in 3 cases, inadequete drainage in 1 case, and in the other 1 case was mixed type. 6. From 1990 to 1991, there were no death associated with operation and there were 1 failure, so the success rate was greatly improved. 7. The bronchopleural fistula or spontaneous rupture of trachea were seen in 12 cases, and the success rate was high in absent cases.

• Journal of Chest Surgery
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• 제57권2호
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• pp.225-229
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• 2024

Venovenous (VV) extracorporeal membrane oxygenation (ECMO) is a lifesaving technique for patients experiencing respiratory failure. When VV ECMO fails to provide adequate support despite optimal settings, alternative strategies may be employed. One option is to add another venous cannula to increase venous drainage, while another is to insert an additional arterial return cannula to assist cardiac function. Alternatively, a separate ECMO circuit can be implemented to function in parallel with the existing circuit. We present a case in which the parallel ECMO method was used in a 63-year-old man with respiratory failure due to coronavirus disease 2019, combined with cardiac dysfunction. We installed an additional venoarterial ECMO circuit alongside the existing VV ECMO circuit and successfully weaned the patient from both types of ECMO. In this report, we share our experience and discuss this method.

• 한국간담췌외과학회지
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• 제27권1호
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• pp.56-62
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• 2023

Backgrounds/Aims: Endoscopic retrograde cholangiopancreatography-guided gallbladder drainage (ERGD) is an alternative to percutaneous cholecystostomy (PTC) for hospitalized acute cholecystitis (AC) patients. Methods: We retrospectively analyzed propensity score matched (PSM) AC hospitalizations using the National Inpatient Sample database between 2016 and 2019 to compare the outcomes of ERGD and PTC. Results: After PSM, there were 3,360 AC hospitalizations, with 48.8% undergoing PTC and 51.2% undergoing ERGD. There was no difference in median length of stay between the PTC and ERGD cohorts (p = 0.110). There was a higher median hospitalization cost in the ERGD cohort, $62,562 (interquartile range [IQR] $40,707-97,978) compared to PTC, $40,413 (IQR $25,244-65,608; p < 0.001). The 30-day inpatient mortality was significantly lower in hospitalizations with ERGD compared to PTC (adjusted hazard ratio 0.16, 95% confidence interval [CI]: 0.1-0.41; p < 0.001). There was no difference in association with blood transfusions, acute renal failure, ileus, small bowel obstruction, and open cholecystectomy conversion (p > 0.05) between hospitalizations with ERGD and PTC. There was lower association of acute hypoxic respiratory failure (adjusted ratio [AOR] 0.46, 95% CI: 0.29-0.72; p = 0.001), hypovolemia (AOR 0.66, 95% CI: 0.49-0.82; p = 0.009) and higher association of lower gastrointestinal bleed (AOR 1.94, 95% CI: 1.48-2.54; p < 0.001) with ERGD compared to PTC. Conclusions: ERGD is a safer alternative to PTC in patients with AC. The risk complications are lower in ERGD compared to PTC but no difference exists based on mortality or conversion to open cholecystectomy.