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Yoon, Hyun,Na, Seung Heon,Choi, Jae Young,Kim, Min Woo,Kim, Hayong,An, Hee Sang,Min, Byoung Koun,Ahn, SeJin,Yun, Jae Ho,Gwak, Jihye,Yoon, KyungHoon,Kolekar, Sanjay S.,van Hest, Maikel F. A. M.,Al-Deya American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.11
<P>We have demonstrated the first example of carbon- and oxygen-free Cu(In,Ga)(SSe)<SUB>2</SUB> (CIGSSe) absorber layers prepared by electrospraying a CuInGa (CIG) precursor followed by annealing, sulfurization, and selenization at elevated temperature. X-ray diffraction and scanning electron microscopy showed that the amorphous as-deposited (CIG) precursor film was converted into polycrystalline CIGSSe with a flat-grained morphology after post-treatment. The optimal post-treatment temperature was 300 °C for annealing and 500 °C for both sulfurization and selenization, with a ramp rate of 5 °C/min. The carbon impurities in the precursor film were removed by air annealing, and oxide that was formed during annealing was removed by sulfurization. The fabricated CIGSSe solar cell showed a conversion efficiency of 4.63% for a 0.44 cm<SUP>2</SUP> area, with <I>V</I><SUB>oc</SUB> = 0.4 V, <I>J</I><SUB>sc</SUB> = 21 mA/cm<SUP>2</SUP>, and FF = 0.53.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-11/am501286d/production/images/medium/am-2014-01286d_0016.gif'></P>
Sedation and general anesthesia outside of the operating room
Yoon Ji Choi,Mi Hyeon Kim,Chang Sook Song,Sung-Hoon Kim,Jeong-Yeon Hong,Eun-Ha Suk,So-hyun Kil,Heon-yong Bae,Dong Hun Kim,Pyung Hwan Park 대한마취통증의학회 2012 Anesthesia and pain medicine Vol.7 No.3
Background: The aim of this study is to evaluate the status and adverse events of anesthesiologist-administered sedation and general anesthesia, outside of the operating room. Methods: Patients undergoing sedation and general anesthesia,outside of the operating room, were retrospectively reviewed, during the study period from March to October of 2011. The patient’s characteristics, primary diagnosis for the procedure, procedures performed outside of the operating room, adverse events associated with sedation and anesthesia, sedatives/anesthetic agents, and anesthetic time, were all assessed. Results: A total of 429 patient’s submitted data on 44 sedation/401general anesthesia were encountered, during the study period. The range of age varied from 2 months to 83 yrs. Most common primary diagnosis for the procedure, during sedation or general anesthesia,was vascular or neurologic problem, respectively. The most frequently used sedatives or analgesics were propofol alone, during sedation (45%) and propofol with remifentanil, during general anesthesia (60%), respectively. Adverse events occurred in 32%, during sedation and 29%, during general anesthesia. Bradycardia occurred in 16%of sedation and hypotension occurred in 15% of general anesthesia. Conclusions: Our data suggest that the sedation/general anesthesia for procedures, outside of the operating room, have been performed in a complex situation, various location, and wide age groups. Adequate monitoring, sufficient anesthesia support, including skilled staff and emergency equipments, and appropriate drug for each procedure are needed for the patient’s safety.
Yoon, Ji-Yong,Woo, Sung-Il,Kim, Heon,Sun, Yong-Han,Hahn, Youn-Soo The Korean Pediatric Society 2012 Clinical and Experimental Pediatrics (CEP) Vol.55 No.9
Purpose: Fractional exhaled nitric oxide (FeNO) and forced expiratory flow between 25% and 75% of vital capacity ($FEF_{25-75}$) are not included in routine monitoring of asthma control. We observed changes in FeNO level and $FEF_{25-75}$ after FeNO-based treatment with inhaled corticosteroid (ICS) in children with controlled asthma (CA). Methods: We recruited 148 children with asthma (age, 8 to 16 years) who had maintained asthma control and normal forced expiratory volume in the first second ($FEV_1$) without control medication for ${\geq}3$ months. Patients with FeNO levels >25 ppb were allocated to the ICS-treated (FeNO-based management) or untreated group (guideline-based management). Changes in spirometric values and FeNO levels from baseline were evaluated after 6 weeks. Results: Ninety-three patients had FeNO levels >25 ppb. These patients had lower $FEF_{25-75}$ % predicted values than those with FeNO levels ${\leq}25$ ppb (P<0.01). After 6 weeks, the geometric mean (GM) FeNO level in the ICS-treated group was 45% lower than the baseline value, and the mean percent increase in $FEF_{25-75}$ was 18.7% which was greater than that in other spirometric values. There was a negative correlation between percent changes in $FEF_{25-75}$ and FeNO (r=-0.368, P=0.001). In contrast, the GM FeNO and spirometric values were not significantly different from the baseline values in the untreated group. Conclusion: The anti-inflammatory treatment simultaneously improved the FeNO levels and $FEF_{25-75}$ in CA patients when their FeNO levels were >25 ppb.
Effects of Early Operation in Patients Who Diagnosed Complicated Parapneumonic Effusion
( Sung Jun Chung ),( Hyo Jun Jang ),( Jee Yea Choi ),( Joonkyung Kim ),( Jun Ho Lee ),( Hyun Lee ),( Dong Won Park ),( Sang-heon Kim ),( Jang Won Sohn ),( Hyuck Kim ),( Ho Joo Yoon ),( Won Sang Chung 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.-
Purpose Thoracic empyema is defined as active suppuration within the pleural space and its treatment is controversial. Recently treatment of empyema is changing observation of empyema formation to early invasive treatment with the operation. This study compared the outcomes of early surgery and delayed surgery Method We retrospectively reviewed 40 patients who underwent surgery for complicated parapneumonic effusion from January of 2013 to May of 2020. The early group was defined as operation with empyema diagnosed within 1 week. Results Among 40 patients, 22 patients received early surgery, and 18 patients received delayed surgery. Stage III empyema was prevalent in the delayed group (27.3% vs 76.9%, p=0.004). Operative time was longer in the delayed group (87.5 vs 132.5 min, p=0.004). Intraoperative blood loss was more in the delayed group (200ml vs 750ml, p=0.009). The hospital stay was longer in the delayed group (18.5 days vs 30.0 days, p<0.001). The complication rate was not different between groups (31.8% vs 33.3%, p=0.919). The mortality rate was no significance between the two groups (4.5% vs 5.6%, p=0.884). Conclusion Delayed surgical treatment make operation difficult. Although inactive infected phase, early surgical treatment did not increase postoperative morbidity and mortality.
Acute respiratory distress syndrome caused by gadolinium: a case report
( Sung Jun Chung ),( Ho Joo Yoon ),( Yoomi Yeo ),( Hyun Lee ),( Tai Sun Park ),( Dong Won Park ),( Ji-yong Moon ),( Sang-heon Kim ),( Tae-hyung Kim ),( Jang Won Sohn ) 대한결핵 및 호흡기학회 2019 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.127 No.0
Acute respiratory distress syndrome (ARDS) is a serious parenchymal lung disease characterized by acute respiratory failure. While various factors can lead to the development of ARDS, many drugs are also suggested to cause ARDS. Gadolinium is a chemical agent, which is used as contrast agents for magnetic resonance imaging (MRI). Here we report a case of gadolinium induced ARDS in a young male adult. A 25-year-old male patient presented to the emergency department of a tertiary university hospital with acute onset dyspnea. On the day of dyspnea onset, he underwent a brain MRI for evaluation of his headache which lasted for three months. Previously, he was healthy and had not taken any medications. Twenty minutes after administration of gadobutrol, a gadolinium- based contrast agent during MRI, he felt short of breath. As dyspnea aggravated over hours, he visited the emergency department of a tertiary university hospital. On physical examination, the respiratory rate was thirty per minute and the breath sound was decreased over the chest. Chest radiographs and CT scan showed bilateral diffuse infiltration of both lungs without cardiomegaly or pleural effusion. Arterial partial pressure of oxygen (PaO<sub>2</sub>) was decreased below 60/ mmHg and the ratio of PaO<sub>2</sub> over the fraction of inspired oxygen was 220 mmHg. He was admitted to the intensive care unit for the treatment of ARDS. As initial therapy, oxygen was administered with a highflow nasal cannula and systemic corticosteroids were given. Over a week of hospitalization and treatment, chest infiltration was recovered and acute respiratory failure was resolved.