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- 저자 : 조병주 ( Byung Joo Jo ) (검색결과 4 건)
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의인성 쇄골하정맥 파열로 인한 응급 혈관내 스텐트 삽입
강병우 ( Byung Woo Kang ),배준호 ( Jun Ho Bae ),정진욱 ( Jin Wook Chung ),조병주 ( Byeong Joo Jo ),박준기 ( Jun Gi Park ),나득영 ( Deuk Young Nah ) 대한외상학회 2015 大韓外傷學會誌 Vol.28 No.2
Central venous cannulation is one of the most commonly performed procedures for critically ill patients in the emergency room. Serious complications like a rupture of subclavian artery may occur during this procedure. We report a case of successful stent graft deployment for iatrogenic ruptured subclavian artery after attempted right subclavian vein catheterization in a 31 year-old female patient with hypovolemic shock due to cervical os laceration during vaginal delivery. [ J Trauma Inj 2015; 28: 83-86 ]
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정상 안압 녹내장 환자에서 24시간활동혈압 측정: 망막혈관너비 및 시야결손 진행과의 연관성
조애린(Aerin Jo),이형우(Hyungwoo Lee),조병주(Byung Joo Cho) 대한안과학회 2017 대한안과학회지 Vol.58 No.11
목적: 정상 안압 녹내장 환자에서 24시간활동혈압을 측정하여 이와 시신경유두 주위 망막혈관너비 및 시야결손 진행과의 연관성을 알아보고자 하였다. 대상과 방법: 24시간활동혈압 검사에서 야간 혈압 저하가 10% 미만인 경우를 야간 혈압 저하가 없는 군(non-dipper), 10% 이상인 경우를 야간 혈압 저하군(dipper)으로 정의하였고, 이를 안저 촬영에서 측정한 망막혈관너비와 시야검사의 mean deviation (MD)값, Glaucoma Progression Analysis (GPA)를 통해 확인한 시야결손의 진행 정도와 비교하였다. 결과: 망막 동맥 너비는 야간 혈압 저하가 없는 군에서 7.99 ± 0.82 μm로 야간 혈압 저하군의 동맥 7.33 ± 0.79 μm와 유의한 차이를 보였으나(p=0.015), 망막 정맥 너비는 야간 혈압 저하가 없는 군에서 9.65 ± 1.35 μm, 야간 혈압 저하군에서 10.27 ± 1.14 μm로두 군 간의 유의한 차이는 보이지 않았다(p=0.131). 시야검사의 MD값은 야간 혈압 저하가 없는 군에서 초기 시야검사 -3.91 ± 2.39 dB, 2년 후 시야검사 -5.05 ± 3.26 dB로 야간 혈압 저하군에서 초기 시야검사 -1.65 ± 1.17 dB, 2년 후 시야검사 -2.53 ± 1.85 dB과 유의한 차이를 보였다(각각 p=0.006, p=0.030). 그러나 2년 후, 4년 후 GPA에서 야간 혈압 저하와 시야결손의 진행이 유의한 상관관계를 보이지 않았다(p=0.658). 결론: 야간 혈압 저하 유무는 망막 동맥 너비, MD값의 변화와 유의한 상관관계를 보여, 안저 사진과 같은 비침습적 검사로 야간 혈압 저하와 같은 혈역학적 요인을 예측할 수 있음을 시사한다. Purpose: To investigate the correlation between 24-hour ambulatory blood pressure (BP) monitoring and peripapillary retinal vessel width and visual field (VF) defect progression in normal tension glaucoma (NTG) patients. Methods: All patients were classified by 24-hour ambulatory BP monitoring as non-dipper (nocturnal dip < 10%) and dipper (nocturnal dip ≥ 10%) group. Vessel diameter, mean deviation (MD) value by VF test and VF progression from Glaucoma Progression Analysis (GPA) were compared among non-dipper and dipper groups. Results: Retinal arterial diameter was wider in the non-dipper group compared to the dipper group (p = 0.015), while retinal venous diameter had no significant relationship between the two groups (p = 0.131). The MD value at baseline and 2 years after was worse in the non-dipper group than the dipper group, respectively (p = 0.006, p = 0.030). But, there was no significant relationship between nocturnal dip and GPA progression (p = 0.658). Conclusions: There was a statistically significant correlation between nocturnal dips and retinal arterial diameter and MD values. These results suggest that non-invasive fundus photography can predict hemodynamic features like nocturnal dip. J Korean Ophthalmol Soc 2017;58(11):1242-1247
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조윤혜(Youn hye Jo),지복준(Bokjun Ji),조병주(Byung Joo Cho) 대한안과학회 2017 대한안과학회지 Vol.58 No.9
Purpose: To investigate the changes in intraocular pressure (IOP) and associated systemic factors over 7 years in a healthy Korean population. Methods: This longitudinal study included healthy subjects with no history of ocular disease and who had been receiving health examinations seven years apart at the Konkuk University Medical Center, Healthcare Center. The participants completed lifestyle questionnaires and underwent general health examinations (blood pressure, height and weight, and blood biochemical tests) and ocular examinations including noncontact tonometry and fundus photography. Subjects with abnormal fundus photography findings and ocular hypertension were excluded. Changes in IOP and systemic factors over 7 years were analyzed. Results: Of 524 possible subjects, 469 were enrolled (55 subjects were excluded: 50 due to abnormal fundus photography and 5 for missing data). The left eye was analyzed in all patients. In all subjects, initial IOP (mean 14.50 ± 3.14 mmHg) was not significantly different from final IOP (14.72 ± 3.38 mmHg) (paired t-test, p = 0.074). In male patients, the final IOP was significantly higher than the initial IOP (paired t-test, p = 0.035). Lifestyle questionnaire variables were associated with a final IOP that was significantly higher than the initial IOP (smokers, alcohol drinkers and less exercisers, paired t-test; p = 0.014, 0.010 and 0.024, respectively). A linear mixed-effects model analysis showed that the change in IOP was negatively associated with age, but this was not statistically significant. Changes in systolic blood pressure (SBP), body mass index (BMI), total cholesterol (T.Chol) and low density lipoprotein (LDL) were positively correlated with change in IOP. Conclusions: A linear mixed-model analysis showed IOP decreased with age but this was not statistically significant. Changes in SBP, BMI, T.Chol and LDL were significantly positively correlated with change in IOP. J Korean Ophthalmol Soc 2017;58(9):1074-1079
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NaBH4 가수분해 반응에 의한 무인항공기용 PEMFC 수소공급
정현승 ( Hyeon Seong Jung ),조병주 ( Byung Joo Jo ),이정훈 ( Jung Hoon Lee ),이한종 ( Han Jong Lee ),나일채 ( Il Chai Na ),추천호 ( Cheun Ho Chu ),박권필 ( Kwon Pil Park ) 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.1
무인항공기가 장시간 비행하기 위해서는 배터리보다 고분자전해질 연료전지(PEMFC)가 적합하다. 본 연구에서는 PEMFC 에 수소를 공급하는 NaBH4가수분해 반응 시스템에 대해 연구하였다. NaBH4가수분해 반응 시스템의 무게를 감소시키기 위해 수소수율 향상, 응축수 회수, 안정적인 수율 유지 등에 대해 실험하였다. 반응기 압력제어를 함으로써 수소 수율을 3.4%향상시켰다. 수소를 공랭하여 PEMFC 스택에 공급하는 과정에서 발생하는 응축수를 NaBH4 저장조에 회수하였다. 이 과정에서 응축수가 NaBH4분말을 용해시켜 보충됨으로써 14%의 무게 감량효과가 있었다. 2.0 L/min의 속도로 수소를 발생시킬때 Co-P-B촉매 2.0 g을 사용해서 10시간동안 96% 수소수율로 NaBH4가수분해 반응 시스템을 안정적으로 구동하였다. Proton Exchange Membrane Fuel Cells (PEMFC) instead of batteries is appropriate for long time flight of unmanned aero vehicles (UAV). In this work, NaBH4 hydrolysis system supplying hydrogen to PEMFC was studied. In order to decrease weight of NaBH4 hydrolysis system, enhancement of hydrogen yield, recovery of condensing water and maintenance of stable hydrogen yield were studied. The hydrogen yield of 3.4% was increased by controlling of hydrogen pressure in hydrolysis reactor. Condensing water formed during air cooling of hydrogen was recovered into storage tank of NaBH4 solution. In this process the condensing water dissolved NaBH4 powder and then addition of NaBH4 solution decreased system weight of 14%. NaBH4 hydrolysis system was stably operated with hydrogen yield of 96% by 2.0g Co-P-B catalyst for 10 hours at 2.0L/min hydrogen evolution rate.
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