세탁기의 진동소음 저감을 지원하는 자동 수평 평판 기구설계

박동연 ( Dong-yeun Park ),정재현 ( Jae-hyun Jung ),고국원 ( Kuk-won Ko ),김성기 ( Sung-ki Kim ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.2

세탁기에서 둥속 원운동(uniform circular motion)시 발생하는 힘으로 인해 생기는 소음 및 진 동을 트라이포드 수평계 (tripod water level)의 자동 수평맞춤 센서 장치, 방진고무(vibration proof rubber)를 장착한 최적의 진동흡수 평판 기구를 설계 하고자 한다. 본 연구의 결과는 세탁기 소음으로 인한 층간소음 문제 해결에 기여 할 것이다.

조혈모세포 이식 후 Tacrolimus와 연관된 이식관련 혈전미세혈관병증 망막병증 2예

이성택(Seong Taik Lee),김수연(Su Yeun Kim),강용구(Yong Koo Kang),박한상(Han Sang Park),박동호(Dong Ho Park),신재필(Jae Pil Shin) 대한안과학회 2021 대한안과학회지 Vol.62 No.10

목적: 백혈병에서 동종 말초혈액 조혈모세포 이식 후 Tacrolimus와 연관된 이식관련 혈전미세혈관병증에 동반된 망막병증 2예를 보고하고자 한다. 증례요약: 급성골수세포백혈병으로 동종 말초혈액 조혈모세포 이식 후 Tacrolimus를 복용하던 58세 여자가 양안의 시력저하로 내원했다. 우안 시력은 0.5, 좌안은 0.4였고, 안저검사에서 다수의 면화반과 망막출혈을 보였으며 형광안저혈관조영에서 모세혈관 비관류를 보였다. 이식관련 혈전미세혈관병증에 동반된 망막병증이 의심되어 Tacrolimus를 중단하고 혈장분리교환을 시행하였으나 3개월 후 양안에 신생혈관녹내장이 발생하였다. 앞 증례와 유사한 20세 남자가 양안 시력저하로 방문하였다. 우안시력은 0.05, 좌안시력은 0.025였다. 앞의 환자와 유사한 소견을 보여 Tacrolimus를 중단하고 혈장분리교환을 시행하였고 1개월 후 우안 시력은 0.2, 좌안은 0.4로 회복되었다. 결론: 동종 말초혈액 조혈모세포 이식 후 Tacrolimus와 같은 calcineurin 억제제를 복용하는 환자가 시력장애를 호소할 경우 이식관련 혈전미세혈관병증에 동반된 망막병증을 의심해야 하며 조기 진단과 치료가 필요하다. Purpose: We report two cases of tacrolimus-related transplant-associated thrombotic microangiopathy (TA-TMA) retinopathy in leukemia patients who had undergone allogenic peripheral blood stem cell transplantation (PBSCT). Case summary: (Case 1) A 58-year-old woman with a history of PBSCT due to acute myelocytic leukemia and taking tacrolimus was referred to the ophthalmology clinic with visual disturbance. Her visual acuity (VA) was 0.4 in the right eye and 0.5 in the left eye. Multiple cotton wool spots and retinal hemorrhages were found in both eyes on fundus examination. Multiple capillary non-perfusions were seen on fluorescein angiography (FA). Tacrolimus-related TA-TMA retinopathy was suspected. Tacrolimus was discontinued and plasmapheresis was performed. After 3 months, neovascular glaucoma developed and her VA became “counting fingers” at 20 cm in both eyes. (Case 2) A 20-year-old man with a history of PBSCT due to acute lymphocytic leukemia and taking tacrolimus was referred to our clinic because of decreased VA in both eyes. His VA was 0.05 in the right eye and 0.025 in the left eye. Fundus and FA findings were the same as in Case 1, and the patient was suspected to have tacrolimus-related TA-TMA retinopathy. Tacrolimus was discontinued and plasmapheresis was performed. His VA was 0.2 in the right eye and 0.4 in the left eye at 1 month after treatment. Conclusions: It is necessary to consider TA-TMA retinopathy in leukemia patients taking calcineurin inhibitors, such as tacrolimus, who have decreased VA. Early diagnosis and treatment are important. J Korean Ophthalmol Soc 2021;62(10):1428-1434

성인간 생체 부분 간이식수술에서의 간공여자의 안전성

조성호(Sung Ho Jo),황신(Shin Hwang),이승규(Sung Gyu Lee),박광민(Kwang Min Park),이영주(Young Joo Lee),안철수(Chul Soo Ahn),최동락(Dong Lak Choi),주선형(Sun Hyung Joo),전장용(Jang Yong Jun),박동은(Dong Yeun Park),민병철(Pyung Chul Mi 대한외과학회 2001 Annals of Surgical Treatment and Research Vol.60 No.3

전신마취후 경미한 합병증에 대한 고찰

김완식,박동호,유희구,정연탁 대한마취과학회 1978 Korean Journal of Anesthesiology Vol.11 No.4

Recently, with the remarkable theoretical progress made in anesthesiology these years, reports are being made on the results of the study on the complications, minor or major, caused by previous general anesthesia. However, .the reports on incidence vary according to the reporters. According to Riding, the recent development of anesthesiology, anesthetic instruments, knowledge of physiology, anesthetics, induction agents and muscle relaxants are said to have reduced the incidence of complications to a great extent. Riding, Gold and Dyrberg report that the factors capable of influencing the incidence of complication, in the post-operative period include age, sex, premedicants for anesthetics, inhalation method of anesthetics, time of anesthesia, muscle relaxant, use of induction agent, acid-base imbalance and developed knowledge of physioloy, operation site, mental state of patients before operation, general condition, anesthetic technique, and. adequate selection of medicine. Working for Department of Anesthesiology, Hanyang University, from October 1976 to August 1977, we selected, out of the patients who received general anesthesia, 523 males and 372 females, totalling 895, who showed no abnormal symptoms in their respiratory systems, circulatory systems and metabolic systems and observed the incidence of complication in the light of sex, age and operation site, the factors supposed to affect the incidence. An hour prior to the general anesthesia, the patients were given intramuscular injection with premedicants atropine 0. 01 mg per kg, Valium 0. 2 mg or Demerol 1 mg per kg of body weight. For induction of anesthesia, Epontol 10 mg per kg and succinylcholine 1 mg per kg of body weight were injected in the veins, then ventilation was made for a minute with mask and then endotracheal tubes were inserted. and then a minimum amount of air was injected. into the cuff of the endotracheal tube, and the ventilation was done in a semi-closed system. During the period of maintenance, anesthesia was administered in a semi-closed system with 0. 5~l. 0% halothane, 3 L/min of nitrous oxide, 2 L/min of oxygen; and if need be, muscle relaxant was injected into the vein. In case a nondenolarizing agent was used in the course of maintenance, atropine 0. 5~1. 0 mg and neost igmine 2. 0~4. 0mg were injected into the vein for reversion at the recovery time. After the patient was completely recovered, the endotracheal tube was cautiously removed, so as not to give trauma to the throat. As for method of observations, 24 hours after the patient had recovered, we visited the patient in the ward, first observing the existence or nonexistence of incidence of minor complications, and then calculating the incidence by the distribution of sex, age and operation site. The outcome of the observation of the above results by statistics and by chi square test is as follows; 1) the incidence of complications after general anesthesia was high in females. 2) Age has not affected the incidence of complications. 3) The incidence of nausea was highest in the patients with abdominal operation. 4) The incidence of sore throat was highest in the head and neck patients. 5) The incidence of fever was highest in the abdomen patients. 6) The incidence of headache was highest in the head and neck patients.

소아 미추마취의 임상적 고찰

김완식,박동호,유희구,김영석,정연탁,김미연 대한마취과학회 1979 Korean Journal of Anesthesiology Vol.12 No.2

Many studies have cited occurrences of severe and long-lasting emotional disturbances of almost every kind after surgical procedures, particularly due to the sedatives or narcotics which were administered to control the post-operative pain. In order to control this post-operative pain, pediatric caudal analgesia was performed in 15 infants and children from the age 2 months to 6 years, who were to undergo lower abdomen, perineum and lower extremity surgery. They were induced with inhalation anesthoeia, using nitrous oxide, oxygen and halothane by mask before and during the block. Following the block, infants and children were turned to supine position and the initial concentration of halothane was reduced. All cases were given 10mg/kg of 1% solution of lidocaine. On examination of the level of the analgesia, 13 out of 15 cases had spread higher level than T₁0, with effective block for surgical procedures. The identification of the sacral cornu is easy and technical failureis lees in comparison than with the umbar epidural block for infants and children. Thus we can perform this block sucessfully for infants and children without any complications or accidents. It is especially helpful in the management of postoperative cases due to the effect in control of the postoperative pain. Thus it gives satistaction to their parents, nurses and doctors. Despite no follow-up study on postoperative emotional reactions, it was considered that there were minimal occurrences of emotional and behavioral sequelae following the hospital and surgical experiences.