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Dasom Yoon,Hyesun Choi,Jong-Ho Park 대한신경초음파학회 2024 대한신경초음파학회지 (JNN) Vol.16 No.1
Acute basilar artery (BA) occlusion is a key etiology of devastating posterior circulation stroke, unless recanalization is performed early. Recanalization therapy is determined synthetically based on symptom onset time, stroke severity, and brain imaging. Herein, we report the case of a 72-year-old male patient presenting with minor neurological symptoms, but with thrombotic occlusion at the BA tip. Transcranial Doppler (TCD) showed systolic flow reversal along the vertebrobasilar arteries, and the patient benefited from endovascular thrombectomy. This case highlights the critical role of TCD in identifying hemodynamic insufficiency and determining the implementation of endovascular interventions to mitigate stroke progression.
Updating Korean Disability Weights for Causes of Disease: Adopting an Add-on Study Method
Dasom Im,Noor Afif Mahmudah,Seok-Jun Yoon,Young-Eun Kim,Don-Hyung Lee,Yeon-hee Kim,Yoon-Sun Jung,Minsu Ock The Korean Society for Preventive Medicine 2023 예방의학회지 Vol.56 No.4
Objectives: Disability weights require regular updates, as they are influenced by both diseases and societal perceptions. Consequently, it is necessary to develop an up-to-date list of the causes of diseases and establish a survey panel for estimating disability weights. Accordingly, this study was conducted to calculate, assess, modify, and validate disability weights suitable for Korea, accounting for its cultural and social characteristics. Methods: The 380 causes of disease used in the survey were derived from the 2019 Global Burden of Disease Collaborative Network and from 2019 and 2020 Korean studies on disability weights for causes of disease. Disability weights were reanalyzed by integrating the findings of an earlier survey on disability weights in Korea with those of the additional survey conducted in this study. The responses were transformed into paired comparisons and analyzed using probit regression analysis. Coefficients for the causes of disease were converted into predicted probabilities, and disability weights in 2 models (model 1 and 2) were rescaled using a normal distribution and the natural logarithm, respectively. Results: The mean values for the 380 causes of disease in models 1 and 2 were 0.488 and 0.369, respectively. Both models exhibited the same order of disability weights. The disability weights for the 300 causes of disease present in both the current and 2019 studies demonstrated a Pearson correlation coefficient of 0.994 (p=0.001 for both models). This study presents a detailed add-on approach for calculating disability weights. Conclusions: This method can be employed in other countries to obtain timely disability weight estimations.
전문가 설문조사 및 현장조사를 통한 국내 비디오투시연하검사 실시 현황
Dasom Yoon,Hyoung Su Park,Jaewon Beom,Si Hyun Kang,서경묵,김돈규 대한연하장애학회 2020 대한연하장애학회지 Vol.10 No.1
Objective: This study has been conducted to identify the current status of videofluoroscopic swallowing study (VFSS)in Korean general hospitals. Methods: We developed a questionnaire related to VFSS protocols and test diet. It was sent to the expert physicians whodirectly implementing VFSS in 35 training hospitals, which were sent out and collected by e-mail from December 7, 2017to February 19, 2018. Among them, 12 out of 28 hospitals selected randomly and we conducted field survey including observingthe process of the VFSS. Results: The most common protocol was to provide a test sample with 7 stages (28.1%). In the order of provided testsamples, ‘the small amount of liquid’ was the most provided in the 1st stage (53.1%). Among the used samples of thin liquidlevel, the mixing ratio of the liquid samples and barium was not uniform among each institution. ‘Yogurt (semi-solidtype)’ was the most commonly used sample for ‘nectar thick’ and ‘honey thick’ diet. Various samples were used on‘pudding thick’ diet. Conclusion: These results indicate that, in the 32 Korean general hospitals, each hospital uses samples depending on experienceor according to its own standards rather than unified standard among the institutions. Thus, the protocols foreach hospital are not standardized, which make them difficult to the accurate sharing of information about the testresults. Therefore, it will be necessary to make a consensus for the protocol and establish nationwide standard of VFSSthrough future research.
Dasom Kim,Joon Shik Yoon,Seok Kang,Byungheon Kang,Beom Suk Kim,Jae Young Kim,Im Joo Rhyu 대한체질인류학회 2021 대한체질인류학회 학술대회 연제 초록 Vol.64 No.-
Ultrasound guidance may improve the accuracy of botulinum toxin injection, but studies of its potential for cervical dystonia treatment are lacking. So, to determine the accuracy of ultrasound-guided injection in the sternocleidomastoid muscle (SCM). In total, 36 SCMs from 18 embalmed cadavers were examined. One physician performed scans to divide each SCM into quarters and evaluated its cross-sectional area (CSA) and thickness at each of three meeting points between adjacent quarters. Under ultrasound guidance, another experienced physician injected methylene blue solution at one of the three points, using the in-plane technique (12 specimen per point; right SCM 3 mL, left SCM 5 mL). One anatomist dissected all cadavers and measured the distance of dye dispersion along the longitudinal axis of each muscle. Dispersion ratio was calculated as longitudinal dye dispersion divided by SCM length. As a result, SCM thickness and CSA were greatest at the middle injection point (mean ± SD of 6.6 ± 2.0 mm and 1.4 ± 0.6 cm<sup>2</sup> respectively). All injections were successful, except in one case where the SCM was thin and the dye reached the omohyoid muscle. Mean longitudinal dye dispersion and dispersion ratio were significantly greater when the volume was 5 mL. There were no statistically significant differences in dispersion patterns among the three injection points. Ultrasound-guided intramuscular injection can be performed with good accuracy in the SCM, as ultrasound can be used to evaluate SCM thickness and CSA. Higher volumes of injection solution appear to diffuse better, but further clinical studies are required to determine optimal injection volume.
Three-Dimensional Rapid Prototyping of Multidirectional Polymer Nanoprobes for Single Cell Insertion
Yang, Dasom,Hong, Hyeonaug,Seo, Yoon Ho,Kim, Lo Hyun,Ryu, WonHyoung American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.30
<P>Three-dimensional (3D) thermal drawing at nanoscale as a novel rapid prototyping method was demonstrated to create multidirectional polymer nanoprobes for single cell analysis. This 3D drawing enables simple and rapid fabrication of polymeric nanostructures with high aspect ratio. The effect of thermal drawing parameters, such as drawing speeds, dipping depths, and contact duration on the final geometry of polymer nanostructures was investigated. Vertically aligned and L-shaped nanoprobes were fabricated and their insertion into living single cells such as algal cells and human neural stem cells was demonstrated. This technique can be extended to create more complex 3D structures by controlling drawing steps and directions on any surface.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2015/aamick.2015.7.issue-30/acsami.5b05254/production/images/medium/am-2015-05254k_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am5b05254'>ACS Electronic Supporting Info</A></P>
김다솜(Dasom Kim),William Xiu Shun Wong,임명수(Myungsu Lim),류신(Chen Liu),김남규(Namgyu Kim),박준형․(Junhyung Park),길우영(Wooyeong Kil),윤한술(Hansool Yoon) 한국IT서비스학회 2015 한국IT서비스학회지 Vol.14 No.3
Recently, many users frequently share their opinions on diverse issues using various social media. Therefore, many governments have attempted to establish or improve national policies according to the public opinions captured from the various social media. In this paper, we indicate several limitations of traditional approaches for analyzing public opinions about science and technology and provide an alternative methodology to overcome the limitations. First of all, we distinguish science and technology analysis phase and social issue analysis phase to reflect the fact that public opinion can be formed only when a certain science and technology is applied to a specific social issue. Next, we apply a start list and a stop list successively to acquire clarified and interesting results. Finally, to identify most appropriate documents fitting to a given subject, we develop a new concept of logical filter that consists of not only mere keywords but also a logical relationship among keywords. This study then analyzes the possibilities for the practical use of the proposed methodology thorough its application to discovering core issues and public opinions from 1,700,886 documents comprising SNS, blog, news, and discussion.