Toluene diisocyanate 폭로 근로자에서의 직업성 천식에 관한 연구

정익수,최재욱,차철환 고려대학교 의과대학 1993 고려대 의대 잡지 Vol.30 No.1

In order to measure toluene diisocyanate (TDI) concentration in air, a total of 41 air samples of spray painting workshop in 11 companies were analysed using a High Performance Liquid Chromatography (HPLC). And performed questionnaire survey about respiratory symptoms, physical examinations, TDI-specific Ig E antibody (Phadebas, RAST) test, pulmonary funtion test including forced vital capacity (FVC), forced expiratory volume in one second (FEV_(10)), vital capacity (VC) and peak expiratory flow rate (PEFR) on 32 spray painters (Group 1), 38 spray assistants (Group 2) and 22 nonexposed workers (Group 3) for comparison. The results were as follows ; 1. The average concentration of TDI in air of water-wash spray booth site was 0.0042±0.023 ppm, closed type spray booth site was 0.0019±0.0013 ppm, drying room site was 0.0044±0.0022 ppm, spray assisstant work site was 0.0013±0.0003 ppm by each. 2. Among the respiratory symptoms, frequency rate of 'dyspnea' and 'dyspnea on working' were significantly higher in group 2 and group 1, and FVC, PEFR decreased significantly in subjects having the symptom of 'dyspnea on working.' 3. The FEV_(10) and FVC decreased significantly in exposed group (group 1 and group 2), while group 1, 3 pair showed significant change in FEV_(10) and group 2, 3 pair showed significant change in FVC. 4. In the TDI-specific Ig E antibody (Phadebas, RAST) test, numbers of workers with positive reaction were 4 (15.0%) in group 1, 4 (11.8%) in group 2 and 0 (0.0%) in group 3. And among the subjects with positive reaction to TDI-specific Ig E antibody, 2 cases had 'dyspnea' and 'dyspnea on working' symptoms, I case showed pulmonary function abnormality and 2 cases showed positive response with PEFR test. 5. PEFR tests on 15 subjects who had remarkable symptoms or TDI-specific Ig E antibody at least for 2 weeks were performed. The number of cases of positive response compatible with occupational asthma was 6 (40%), and amomg these cases, 2 workers (33%) showed positive reaction of TDI-specific Ig E antibody.

기관튜브닝내 압력에 관한 임상적 연구

정익수,고홍,염광원 대한마취과학회 1985 Korean Journal of Anesthesiology Vol.18 No.4

After the patients were intubated with a low-or high-pressure cuff, the cuffs were inflated with air enough to seal the trachea. Intracuff volume and pressure were measured and the pressure exerted on the trachea were calculated. After administration of 0%, 50%, or 67% nitrous oxide the measurements were eompared with the initial values. 1) At the start the high-pressure cuff exerted a higher pressure on the trachea than the low-pressure cuff. 2) The volumes of the high-pressure cuffs were not increased after 2 hours by the increasing the coneentration of nitrous oxide, but the pressures in the cuffs were increased significantly. Volumes and pressures of low-pressure cuffs increased after 2 hours when increasing the concentration of nitrous oxide. 3) The pressure exerted on the traches by the high-pressure cuff decreased without a relationship to the concentration of the nitrous oxide, but the pressure exerted on the trachea by the low-pressure cuff increased with increased concentration of nitrous oxide.

Characterization of Polymerization of 2-Ethylhexyl Acrylate by Using Thermal Analysis

정익수 牧園大學校 2000 論文集 - 牧園大學校 Vol.38 No.-

In this paper, the value of the activation energy of overall rate of polymerization by using DSC thermogram is studied by using free radical polymerization of 2-ethylhexyl acrylate. Activation energy is determined at a heating rate of 1 ℃/min, 5 ℃/min, and 1 0℃/min by applying the multiple scanning-rate methods of Kissinger, Osawa as well as the single rate method of Barret.

2011 대구세계육상선수권대회 남자 포환던지기 결선경기의 glide와 rotational 스타일 비교 분석

정익수 한국스포츠학회 2012 한국스포츠학회지 Vol.10 No.1

개심술환자의 호흡관리 실태보고

정익수,김용락 대한마취과학회 1990 Korean Journal of Anesthesiology Vol.23 No.3

An analysis was performed on 270 open heart patients having post-operative respiratory care in the respiratory intensive care unit of Seoul National University Hospital during 1987. The analysis was done according to disease prevalence, sex, age, pump time, duration of mechanical ventilation and mortality rate. 1) The number of cases of acquired heart disease was more than that of congenital heart disease. 2) The most prevalent disease was ventricular septal defect combined with other diseases. 3) The mean age of the total patients was 36.5. The oldest age group was patients who received CABG and the youngest had a ventricular septal defect combined with other diseases. 4) The mean pump time was 93,4 minutes and it was longer in the patients with acquired heart disease than the patients with congenital heart disease. 5) The mean duration of mechanical ventilation was 68.5 hours and it was longer in the patients with acquired heart disease than those with congenital heart disease by about two times. 6) The overall mortality rate was 3.0% which was higher rate than that of the 3rd and 4th reports, and it was a higher in the patients with acquired heart disease than with congenital heart disease. The most prevalent cause of death was low cardiac output syndrome. 7) The length of mechanical ventilation time and death rate were closely related with pump time.

무통 분만시 제왕 절개술과 흡입 분만의 빈도

정익수,최덕환,김지애,김승오,함태수 대한마취과학회 1999 Korean Journal of Anesthesiology Vol.37 No.1

Background: This study was done to compare vacuum delivery and cesarean section rates in a large population before and after on-demand labor epidural analgesia became available. Methods: We retrospectively investigated the overall sets of delivery modes in patients who gave birth during a 12-month period before the introduction of on-demand labor epidural analgesia, and those giving birth after labor epidural analgesia became available. Additionally, we compared the rates of cesarean section or vacuum delivery in patients delivering before and after the availability of on-demand labor epidural. Results: Included were 3905 patients who delivered before, and 4318 patients who delivered after epidural analgesia became available. Labor epidural rates were 0.3% vs 14.7% for the before and after groups. The rates of cesarean delivery for dystocia in primary cesarean operation did not change (10% vs 10.5%), and vacuum delivery rates in the total vaginal delivery patients were not changed (15.1% vs 14.7%) for the before and after group. Conclusions: Increased epidural analgesia did not change the overall cesarean delivery rates for dystocia and vacuum - assisted delivery rates. (Korean J Anesthesiol 1999; 37: 52∼56)

Effect of 2-Chloro-2-phenylpropane in the Free Radical Polymerization of Methyl methacrylate

정익수 牧園大學校 1995 論文集 - 牧園大學校 Vol.28 No.-

The polymerization behavior in the free radical polymerization of methyl methacrylate as a monomer in the presence of 2-chloro-2-phenylpropane (cumyl chloride) is investigated. The experimental data indicated 2-chloro-2-phenylpropane act as a strong chain transfer agent which chain transfer constant is 390 X 10-⁴. From the structural point of view, the high activity of the 2-chloro-2-phenylpropane as a chain transfer is probably due to the weak benzylic C-Cl bond and resonance stabilization of benzylic radical produced in the transfer process.

코칭머신기를 활용한 공기소총 선수의 경기력 향상 방안

정익수,이진 한국코칭능력개발원 2019 코칭능력개발지 Vol.21 No.4

본 연구의 목적은 공기소총 선수의 경기력을 향상시키는 방안으로 전자 분석장비인 코칭머신기에서 분석할 수 있는 정량적인 데이터를 분석해봄으로써 일선지도자들이 코칭머신을 통해 나온 결과를 훈련도중 선수에게 실시간으로 제공해주고, 선수경력이 많지 않은선수들에게 정확한 자세와 격발을 위한 유의미한 데이터를 제공해 주는데 있다. 연구대상은 대한사격연맹에 등록된 중학교 공기소총선수 6명을 대상으로 공기소총에서 고득점으로 생각되는 10.3점 이상인 변인만 분석하였다. 코칭머신기를 통해 분석할 수 있는 변인은 첫째, 격발 직전 일정한 패턴이 그려지기 시작하는 시점의 시간, 둘째, 조준점이 10.0점 이내에서 움직이고 분석되는 (표준)시간의비율(%), 셋째, 조준점이 10.5점 이내에서 움직이고 분석되는 (표준)시간의 비율(%), 마지막으로 격발 2초전의 총구 괘도의 평균 이동괘적을 알 수 있다. 본 연구를 포함하여 공기소총 선수가 고득점에 미치는 변인을 운동학적 변인과 코칭머신을 이용한 과학적인 분석방법과 더불어 격발 시 뇌파분석 및 심리학적 분석과 같은 후속연구가 이루어진다면 선수와 지도자가 경기력 향상을 위한 유의미한훈련방법을 찾는데 기초자료로 활용될 것으로 사료된다.

제왕절개술을 위한 척추마취-Fentanyl과 혼합한 고비중 Bupivacaine의 세가지 용량의 비교-

정익수,최덕환,강윤정 대한마취과학회 1998 Korean Journal of Anesthesiology Vol.35 No.1

Background : Spinal anesthesia for cesarean section is regaining popularity because it offers better intraoperative analgesia and relaxation than epidural anesthesia. Hyperbaric bupivacaine has been known to ameliorate visceral pain more than tetracaine and fentanyl seems to potentiate analgesic effect of bupivacaine. We evaluated if adding fentanyl reduce the dose of spinal hyperbaric bupivacaine. Methods : Sixty healthy term parturients scheduled for elective cesarean section randomly received 8, 10 or 12 mg of 0.5% hyperbaric bupivacaine intrathecally, which was mixed with fentanyl 10ug. Intraoperative analgesia was checked with visual analog scale. Sensory blockade variables such as time to T4 block, maximal block height, time to maximal block height, time to and degree of motor block and muscle relaxation were assessed. We also checked side effects and times of regression to T10, complete motor recovery and start of postoperative pain. Results : All patients had no intraoperative pain. The time to sensory block T4 and the level of maximum sensory block were not significantly different between three groups. Though only 70% of 8 mg group showed complete motor block, which is significantly less than 100% of 10 or 12 mg group (p=0.01), muscle relaxation was equally excellent in three groups. They showed no significant difference in side effects, but sensory and motor recovery and start of postoperative pain were faster in 8 mg group (p<0.05). Conclusion : After mixing with fentanyl 10 g, 10 mg or more of 0.5% hyperbaric bupivacaine was not necessary and 8 mg was enough in spinal anesthesia for cesarean section. (Korean J Anesthesiol 1998; 35: 88∼93)

토론문

정익수 한국여성정책연구원(구 한국여성개발원) 2014 한국여성정책연구원 세미나자료 Vol.2014 No.12