• Tuberculosis and Respiratory Diseases
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• 제45권5호
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• pp.992-999
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• 1998

연구배경: CT상 폐기종의 정량적 분석을 위해서 "Density mask"를 이용하거나 육안적으로 관찰하여 폐기종 지수를 구하고, 폐기종 지수와 폐기능 검사 지표 사이에 상관관계가 있는 지를 알아보았으며, 폐기종 지수를 구하는 여러 방법을 비교하여 보다 간단하고 객관적인 방법을 구하고자 하였다. 방 법: 17명의 폐기종 환자를 대상으로 고해상 전산화 단층 촬영을 시행하였고(모두 남자 환자임, 평균연령 62세), 모든 환자에서 폐확산능과 폐기능 검사를 시행하였다. 환자마다 전체 폐를 포함하는 모든 스캔에서 "Density mask"를 이용하여 -400HU를 기준으로 한 전체 폐용적에 대한 -880, -900, -920HU를 기준으로 한 폐기종 영역의 비를 각각 구하여 폐기종 지수(ESW)를 얻었다. 또 대동맥궁 첨부에서 4cm 간격으로 5-단면을 선택하여 "Density mask"를 이용한 폐기종 지수(ESR)를 구하고, 육안적으로 관찰하여 폐기종 지수(ESV)를 구하였다. 각각의 폐기종 지수를 폐기능 검사지표와 비교하여 통계학적으로 유의한 상관관계가 있는지 알아 보았으며, 폐기종 지수를(ESW, ESR, ESV) 사이에 유의한 차이가 있는지 알아보았다. 곁 과: 폐기종 환자에서 "Density mask"로 전체 폐를 이용하여 얻은 폐기종 지수(ESW)는 폐확산능 (r=0.61)과 $FEV_1/FVC$(r=0.51) 등의 안정시 폐기능 검사지표와 상관관계가 있었다. -880, -900, -920HU로 기준치를 달리 하여 얻은 각각의 ESW 사이에는 유의한 차이가 없었다. 5-단면을 이용하여 얻은 ESR는 ESW와 밀접한 상관관계가 있었고, 상기한 폐기능 검사지표와도 좋은 상관관계를 보였다. 육안적 폐기종 지수는 DLCO(r=0.71)와 physiologic dead space ratio(r=0.58)를 제외한 모든 폐기능 검사와 유의한 상관관계가 없었다(p<0.05). 결 론: CT상 "Density mask"를 이용해 폐기종을 정량분석한 폐기종 지수 (ESW, ESR)와 폐기능 검사지표와 유의한 상관관계가 있었고 폐기종의 중증도의 평가에 유용한 방법으로 생각되며, 또한 폐기능 검사 지표에 대해 ESW가 육안적으로 구한 폐기종 지수(ESV)보다 높은 상관관계를 보였다. 대표적인 5-단면에서 얻은 폐기종 지수(ESR)는 간단하고 정확하여 실제 임상에 권장된다.

• Journal of Yeungnam Medical Science
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• 제33권2호
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• pp.85-89
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• 2016

Background: Formaldehyde is used to preserve cadaver in medical schools, and students are exposed to formaldehyde during cadaver dissection classes. When humans are exposed to formaldehyde, it induces mucosal inflammation, skin inflammation, and declining of neurobehavioral function including attention and memory executive functions. The purpose of this study is to identify the effects of formaldehyde exposure on student's neurobehavioral performance during cadaver dissection classes. Methods: The level of formaldehyde was measured in a cadaver dissection class. A total of 16 students were randomly divided into two groups. One group wore respiratory protection masks, while the other group did not. Among many subtests in Korean Computerized Neurobehavioral test, backward digit span was tested on all subjects before and after the class. Results: The length of memorized digit span between the two groups was not significant; however there was a greater decrease in neurobehavioral function after formaldehyde exposure in the non-mask group than the mask group. Conclusion: Formaldehyde exposure during cadaver dissection may likely decrease neurobehavioral performance of students. Therefore, proper ventilation system and respiratory protective equipment are necessary to protect medical school students from adverse effects of formaldehyde exposure.

• Tuberculosis and Respiratory Diseases
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• 제51권6호
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• pp.585-589
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• 2001

저자들은 심한 천식발작으로 내원한 43세 여자환자에서 응급 기관내 삽관 및 AMBU 양압환기에 종격동기흉, 복강기종, 후복강기종 및 피하기종이 합병되었으나 내과적 치료로 회복된 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

• 대한예방한의학회지
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• 제20권2호
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• pp.69-75
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• 2016

Objectives : The aim of this study is to introduce the Korean medicine respiratory management program in public health center and to analyze the effects of that program. Methods : The respiratory management program was targeted on 22 soldiers during March 2016. The interventions of this program were herbal medicines (Gilgyung-tang and so on), aromatherapy, peppermint tea, fine dust mask, and health education. Data were collected by retrospective reviewing medical chart and analyzed using SPSS 18.0. Results : Total symptoms scores were measured by 4-point likert scale. Total score was $5.50{\pm}4.848$ at 1st week and $3.27{\pm}3.058$ at 4th week (p=0.008). The severity of respiratory discomfort reduced by $-1.14{\pm}2.46$ compared with last year. The satisfaction score was $7.82{\pm}4.16$. The most hoping program was muscular skeletal disease management program. Conclusions : This study suggests that Korean medical world should prepare countermeasures to cope with diseases caused by air pollution.

• Tuberculosis and Respiratory Diseases
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• 제82권3호
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• pp.242-250
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• 2019

Background: Data on noninvasive ventilation (NIV) use in intensive care units (ICUs) are very limited in South Korea. Methods: A prospective observational study was performed in 20 ICUs of university-affiliated hospitals from June 2017 to February 2018. Adult patients (age>18 years) who were admitted to the ICU and received NIV treatment for acute respiratory failure were included. Results: A total of 156 patients treated with NIV were enrolled (mean age, $71.9{\pm}11.6years$). The most common indications for NIV were acute hypercapnic respiratory failure (AHRF, n=89) and post-extubation respiratory failure (n=44). The main device for NIV was an invasive mechanical ventilator with an NIV module (61.5%), and the majority of patients (87.2%) used an oronasal mask. After the exclusion of 32 do-not-resuscitate patients, NIV success rate was 68.5% (85/124); ICU and hospital mortality rates were 8.9% and 15.3%, respectively. However, the success rate was lower in patients with de novo respiratory failure (27.3%) compared to that of patients with AHRF (72.8%) or post-extubation respiratory failure (75.0%). In multivariate analysis, immunocompromised state, de novo respiratory failure, post-NIV (2 hours) respiratory rate, NIV mode (i.e., non-pressure support ventilation mode), and the change of NIV device were significantly associated with a lower success rate of NIV. Conclusion: AHRF and post-extubation respiratory failure were the most common indications for NIV in Korean ICUs. Overall NIV success was achieved in 68.5% of patients, with the lowest rate in patients with de novo respiratory failure.

• 대한공간정보학회지
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• 제24권2호
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• pp.55-62
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• 2016

Economic and social damages are expected due to yellow dust, occurring every year in Korea and risk of citizens is getting higher accordingly. This study acquired tweet data for yellow dust, which had been the greatest since 2009 for 11 days before and after February 23, 2015. After that, it conducted an analysis on the issue words and association rule. Regarding acquired tweet data, the results of analyzing issue words by using open source R, statistics language shows that 'Mask' was ranked to be the highest, followed by health-related issue words. This indicates that people put the priority in the use of mask for keeping their health, as a result of the occurrence of yellow dust, and subsequently, they showed an interest in diseases, caused by yellow dust. In addition, yellow dust-related diseases, 'cold', 'rhinitis', 'flu', 'asthma', 'bronchitis' were found as issue words, revealing that people had a high concern on the disease occurrence of the respiratory system. The analytical results are judged to reflect the citizen's thought effectively in the process of establishing measures for the prevention of yellow dust.

• 산경연구논집
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• 제14권5호
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• pp.31-39
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• 2023

Purpose: As SARS-CoV-2, which was the main cause of the global pandemic, has repeatedly mutated in various forms, the threat of the virus has decreased considerably, and the spread has also subsided. Therefore, the purpose of this study was to explore the change in the role of masks and sustainable mask consumption according to the change in perception of wearing masks during the pandemic. Research design, data and methodology: This study used a descriptive review method as a literature review, and utilized the literature search method in PubMed, Riss, Scopus, and Google Scholar databases. Among them, a total of 46 papers were selected in the final stage. Results: As a result, it can be seen that during the pandemic, masks changed their roles according to social trends as their perceptions changed from general perceptions of protecting from external environments or diseases to fashion items with quarantine functions. Conclusions: Masks will be continuously consumed as one of the fashion items with the function of quarantine that protects the respiratory tract from the external environment that is indispensable in our daily lives. Therefore, measures should be taken on sustainable consumption measures according to consumer demand for disposable masks.

• 한국생활과학회지
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• 제17권6호
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• pp.1215-1224
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• 2008

This research has measured the indoor environment of thirty hair salons, which are located on Gunsan-Si, Jeonlabbuk-Do, from April 1st to April 30th 2005, to examine the related factors on a work environment of hairdressers and a revelation of respiratory symptom, and has polled 260 hairdressers and 350 office workers. After measuring the physical environment of hair salons, the room temperature, the relative humidity and the illumination was in an agreeable range, and 60 percent of hair salons depended on the natural ventilation through the windows. The levels of acetone, toluene and xylene, which were measured at the hair salons, were all under the safety standards (p<0.05), but these are still harmful and volatile matters, so they can be bad for your health by the contact of skin and respiration. The harmful factors that affect a revelation of respiratory symptom were the group who has many exposures of permanent wave or bleaching/dyeing and not many experiences of hairdressing work, the group who smokes every day, and the group who never exercises at all (p<0.05). This result shows that there are possibilities of health problem for hairdressers from the constant and repeating hairdressing works with the exposure of chemicals such as the permanent, bleaching and dyeing. so that hairdressers recognize that they need appropriate ventilation facilities for their agreeable indoor-environments. And also, to prevent the direct exposure of chemicals as much as they can, they need to have an active management of an individual health care by wearing gloves, mask or something like that.

• 복식문화연구
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• 제30권4호
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• pp.495-512
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• 2022

This study aims to design a new sizing system for hygienic masks to protect against COVID-19-related respiratory disorders. The product sizes were collected from 70 commercially available hygienic masks, and 18 head measurements were obtained from the three-dimensional (3D) scan data of 2,048 men and women aged 20 to 69 years from the 6th Size Korea Survey. The statistical analysis was performed using the IBM Statistical Package for the Social Sciences (SPSS) 28.0 program. The "bitragion-subnasale arc" and "menton-sellion length" were chosen as the key body dimensions for the hygienic mask sizing system. The linear regressions with 18 3D head measurements were analyzed, and it was determined that the key body dimensions were useful for statistically predicting other 3D head measurements related to hygienic masks. A new sizing system was proposed for two types of masks, "masks with a tight fit" and "masks with a loose fit," taking into account the existing Korean Industrial Standards (KS) and the shortcomings of the sizes of hygienic masks on the market. The sizing system for tight-fitting masks consisted of the key body dimensions, with their sizes indicated by a pair of numbers. The sizing system for loose-fitting masks consisted solely of the bitragion-subnasale arc, with their sizes denoted by letters such as S, M, and L (denoting small, medium, and large, respectively). Future studies should consider this mask sizing system for different age groups, such as children and adolescents.

• Tuberculosis and Respiratory Diseases
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• 제46권3호
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• pp.350-362
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• 1999

연구배경: 침습적 기계 호흡 이탈에 성공하여 기관내 관을 제거하였으나 48시간 이내에 급성 호흡 부전이 경우 또는 환자 스스로 기관내 관을 제거한 후 발생된 급성 호흡 부전은 이탈 실패의 중요한 원인이며, 발생시 기관내 관의 재삽관을 통한 호흡 보조가 표준적 치료이다. 비침습적 양압 환기법(noninvasive positive pressure ventilation이하 NIPPV)은 비 혹은 안면마스크를 통해 양압 환기를 시행하므로 기관내 삽관을 회피할 수 있다. 본 연구는 기계 호흡 이탈 후 기관내 관을 제거한 환자들에게 발생된 급성 호흡 부전 시 NIPPV 적용이 기관내 삽관을 통한 양압 환기 치료를 대체할 수 있는지를 알아보고자 하였다. 방 법: 대상은 아산 재단 서울 중앙병원 내과계 중환자실에 입원하여 기계적 환기 치료를 받고 이탈 과정에서 기관내 관 제거 후 48시간 이내에 급성 호흡 부전이 발생한 환자 21명 및 스스로 기관내 관을 제거한 후 급성 호흡 부전이 발생한 환자 7명과 기관내 관이 기도내 분비물로 막혀 기관내 관을 제거한 환자 2명등 총 31명에게 NIPPV를 적용하였다. NIPPV는 환자 상태에 따라 기계 환기 양식, 압력 보조 수준 및 흡입 산소의 양이 조절 되어졌으며, 압력 보조 8cm $H_2O$미만에서 임상적으로 안정된 상태를 유지하는 경우 완전히 NIPPV에서 이탈하였다. 성공군은 NIPPV 이탈후 48 시간 이상 자발 호흡을 유지한 경우로 정의하였고, 실패군은 NIPPV 시행 후 호흡 부전 소견이나 동맥혈 가스검사의 호전이 없어 다시 기관내 삽관을 시행하여 기계호흡을 시행한 환자로 정의하였다. 각 군에서 NIPPV적용 직전, 적용 후 30분, 6시간, 24시간, NIPPV 이탈 작전 또는 실패하여 기관내 재삽관으로 전환 직전의 심박동수, 분당 호흡수, 동맥혈 가스검사, 압력 보조 수준 및 호기말 양압등을 비교하였다. 결 과: 총 31명에서 NIPPV를 적용하였고, 이 중 성공군은 14명(45%)이었다. 성공군과 실패군을 비교 시 나이, 중환자실 입원 당시의 APACHE III 점수, 기관 내 삽관 기간, 기관내 관 제거 후 NIPPV적용시까지의 시간 및 NIPPV 시행 직전의 분당 호흡수, 심박동수, 동맥혈 가스검사, $PaO_2/FiO_2$ 등은 양군간에 유의한 차이가 없었다. 모든 환자에서 NIPPV적용 30분후부터 분당 호흡수 및 심박동수는 감소하였고 동맥혈 산소 포화도는 증가하였다.(p<0.05) 그러나, 실패군에서는 NIPPV 시행중에 상태가 악화되어 기관내 재삽관을 시행하였고, 재삽관 작전의 분당 호흡수 및 심박동수는 다시 증가하였으며 동맥혈 산소포화도는 감소하였다(p<0.05). 기저 질환이 COPD 이면서 기관내 관 제거 후 급성 호흡부전이 발생한 환자 8명에게 NIPPV 적용 시 COPD가 아닌 다른 환자들에 비해 NIPPV의 성공률이 의미 있게 높았다(62% 대 39%)(p=0.007). NIPPV를 이용한 이탈 시 실패의 원인으로는 기저 질환의 악화 없이 동맥혈 가스 소견이 악화되었던 예가 9예, 그 외 기저 질환 악화 5예, 마스크 부적응이 2예, 기도내 분비물 축적이 1예였다. 결 론: NIPPV는 침습적 기계 호흡이탈과정에서 특히 기저질환이 COPD인 환자들의 경우 기관내 관 제거 후 발생한 급성 호흡 부전 시 기관내 관의 재삽관을 피할 수 있는 유용한 치료적인 방법으로 사료된다.