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Surgical Resection and Polypropylene Mesh Reconstruction for Canine Chest Wall Soft Tissue Sarcoma
정종태 한국임상수의학회 2024 한국임상수의학회지 Vol.41 No.1
A 6-year-old spayed female French Bulldog presented with a left-sided chest wall tumor. Physical examination revealed that the tumor was firmly adhered to the chest wall. A preoperative punch biopsy of the tumor revealed a grade 2 soft tissue sarcoma (STS). On computed tomography, the tumor’s dimensions were assessed as 6.5 × 5.7 × 3.5 cm, and it exhibited invasiveness near the tissue surrounding the ninth rib. The tumor size was large in comparison to the dog’s chest wall area. Hence, if the traditional wide-margin resection surgery were to be performed, primary wound closure seemed impractical and could potentially result in respiratory function complications. Therefore, considering the extent of tumor invasion and grade, deep margins were established to include the removal of the eighth to tenth ribs, and a 1-cm lateral margin was designated to enable primary wound closure. To reconstruct the chest wall, polypropylene mesh was attached to the adjacent ribs and the remaining muscles were sutured and covered over the mesh. The dog exhibited a rapid recovery beginning the day after the operation. Postoperative biopsy confirmed that the tumor was a grade 2 STS, and the surgical margins were evaluated as incomplete. The owner chose to pursue follow-up observation instead of chemotherapy. In this study, the surgical approach was chosen based on the importance of functional recovery after surgery. Recent research indicates that the tumor grade is more critical for postoperative prognosis than the extent of surgical margins when removing an STS.
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정종태,백민훈,강문자,안홍주,황두성,홍대석,정용환,김경수 한국원자력학회 2016 Nuclear Engineering and Technology Vol.48 No.6
A radiological safety assessment study was performed for the transportation of low levelradioactive wastes which are temporarily stored in Korea Atomic Energy Research Institute(KAERI), Daejeon, Korea. We considered two kinds of wastes: (1) operation wastes generatedfrom the routine operation of facilities; and (2) decommissioning wastes generatedfrom the decommissioning of a research reactor in KAERI. The important part of theradiological safety assessment is related to the exposure dose assessment for the incidentfree(normal) transportation of wastes, i.e., the radiation exposure of transport personnel,radiation workers for loading and unloading of radioactive waste drums, and the generalpublic. The effective doses were estimated based on the detailed information on thetransportation plan and on the radiological characteristics of waste packages. We alsoestimated radiological risks and the effective doses for the general public resulting fromaccidents such as an impact and a fire caused by the impact during the transportation. According to the results, the effective doses for transport personnel, radiation workers, andthe general public are far below the regulatory limits. Therefore, we can secure safety fromthe viewpoint of radiological safety for all situations during the transportation of radioactivewastes which have been stored temporarily in KAERI.
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정종태,윤수영,이란,현재호,정귀영,Jeong, Jong Tae,Yun, Su Young,Lee, Ran,Hyun, Jae Ho,Jung, Gyu Young 대한소아청소년과학회 2002 Clinical and Experimental Pediatrics (CEP) Vol.45 No.4
목 적 : 동맥혈 가스 분석은 신생아 집중 치료실에서 환아의 상태를 평가하기 위해 자주 시행하는 검사이나 제대 동맥 카테테르를 이용할 수 없는 경우에는 동맥 천자를 반복해야 되는데 기술적인 어려움과 위험성이 따르게 된다. 이에 저자들은 간편히 시행할 수 있는 모세혈 가스 분석 검사로 동맥혈 가스치를 추정하는 것이 타당성을 가지는지 조사하기 위해 이 연구를 시행하였다. 방 법: 2001년 4월부터 8월까지 방지거병원 신생아 집중 치료실에 입원하여 치료받은 환아 중 2주 이상된 신생아로서 동맥내 카테테르를 삽입하지 않은 상태에서 환기와 대사 상태 평가를 위해 혈액 가스 검사를 시행한 환아를 대상으로 하였다. 대상아들은 발뒤꿈치를 가온한 뒤 모세혈을 채혈하였고 곧 이어 동맥 천자를 시행하여 얻은 동맥혈과 함께 바로 검사실로 보내어 가스 분석하여 각 수치를 비교하였다. 결 과 : 1) 조사된 24명의 신생아의 재태 연령은 32-41주로 채혈은 모두 생후 2주일 이후에 시행되었다. 2) 모세혈과 동맥혈의 $pCO_2$, pH 사이에는 높은 상관 관계가 있었다(P<0.05). 3) 모세혈과 동맥혈의 $pO_2$ 사이에도 유의한 상관관계를 보였으나(P<0.05), 절대값의 차이는 92%에서 10 mmHg 이상이었다. 4) 모세혈과 동맥혈 가스의 상관 관계는 pH, $pCO_2$, $pO_2$의 순으로 유의하였다. 결 론 : 이상의 결과로 보아 동맥혈화된 말초혈액을 이용한 모세혈 가스 분석은 동맥혈 채혈이 어려운 경우에 유용한 대체 수단이 될 수 있을 것으로 생각된다. Purpose : Arterial blood gas analysis is frequently performed in neonatal intensive care unit (NICU) to evaluate ventilation and the metabolic state of critically ill infants. In occasions when umbilical arterial catheterization is not available, frequent arterial puncture is mandatory. This requires some technical skill and may occasionally have side effects. So we studied the validity of capillary blood gas analysis which can be performed conveniently compared with arterial blood. Methods : Twenty-four neonates admitted to NICU during April to Aug. 2001 were studied. They were more than two weeks old without indwelling arterial catheters. Thirty-six times, simultaneous arterial, and capillary blood gases were drawn by puncture and the pH, $pCO_2$ and $pO_2$ of each sample was measured. Blood pressure and body temperature was checked before sampling to rule out impaired peripheral circulation. Capillary blood was collected from warmed heels. Results : There was a strong correlation between capillary and arterial pH(r=0.91, P<0.05). The absolute value of the difference between arterial and capillary pH was less than 0.05. Also capillary $pCO_2$ showed correlation with arterial $pCO_2$(r=0.77, P<0.05). Despite a statistically significant correlation between capillary and arterial $pO_2$(r=0.68, P<0.05), the absolute value of the difference was more than 10 mmHg in 92% of cases. Conclusion : Capillary blood gases accurately reflected arterial pH and $pCO_2$ and showed a relative correlation with $pO_2$. Capillary blood gas analysis can be a useful alternative to arterial blood when continuation of the umbilical arterial catheter is no longer available.
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정종태,한상윤,윤성구,최선영 한국수처리학회 2023 한국수처리학회지 Vol.31 No.3
The use of insoluble electrodes in electrolytic oxidation for the removal of non-biodegradable organic matter, color, odor, and ammonia nitrogen from wastewater has recently received significant research attention.ﾠ When employing electrochemical oxidation as a water treatment process, considering the water treatment characteristics of the electrodes and scale formation is important for efficient operation. Therefore, in this paper, the treatment characteristics and scale formation properties of an electrochemical oxidation approach that uses insoluble electrodes for the tertiary treatment of paper mill wastewater were analyzed. In particular, the effects of the operational conditions on the treatment efficiency and the occurrence of scaling were investigated. Electrolytic oxidation experiments using secondary treated pulp and paper wastewater demonstrated that it is possible to achieve a removal efficiency of 43.9% for TOC, 46.4% for TCODMn, and 89.9% for color. During the batch operation period of four weeks, an analysis of the scaling components formed on the electrodes revealed substances that resembled cement and putty in their composition. Furthermore, it was observed that scale removal from the electrodes was insufficient solely using the cross-operation of normal and reverse power supply. .
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정종태,이충섭,고형철,하성용,남상용,조원준,백영순 한국막학회 2012 멤브레인 Vol.22 No.2
DME 제조공정에서 발생하는 혼합가스 중 CO2를 제거하기 위해서 H2 투과도보다 CO2투과도가 우수한 고무상 고분자를 분리소재로 선정하여 복합막을 제조하고 CO2/H2의 분리성능을 검증하여 보았다. 지지체 중공사막 소재로 PEI를 이용하여 지지체 중공사막을 제조하였으며, 제조된 지지체 중공사막의 기체투과도를 각 가스별로 측정하여 PDMS의 경우는 CO2 투과도 300 GPU 이상, CO2/H2의 선택도가 4.3 이상, PEBAX를 사용한 경우 CO2 투과도 120 GPU 이상 CO2/H2의 선택도가 5 이상인 복합 중공사를 제조하였다. In order to remove CO2 from the DME plant process, we investigated the composite membrane with rubbery polymers as the separation layer and its separation performance of CO2 and H2. Hollow fiber membranes for supporting layer were prepared by solution spinning method. In case of using PDMS as a separation layer, the composite membranes showed the permeation rates of CO2 were over 300 GPU and minimum CO2/H2 selectivitties were 4.3 and in case of using PEBAX as a separation layer, the composite membranes showed the permeation rates of CO2 were over 120 GPU and minimum CO2/H2 selectivities were 5.
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