1.Relationship between magnesium and calcium to glucose stimulated insulin secretion in the perfused rat pancreas
Kun Ho YOON ; Soon Jip YOO ; Hyun Sik SON ; Moo Il KANG ; Kwan Soo HONG ; Bong Youn CHA ; Kwang Woo LEE ; Ho Young SON ; Sung Ku KANG
Journal of the Korean Diabetes Association 1991;15(1):63-71
2.Application of Support Vector Machine for Prediction of Medication Adherence in Heart Failure Patients.
Youn Jung SON ; Hong Gee KIM ; Eung Hee KIM ; Sangsup CHOI ; Soo Kyoung LEE
Healthcare Informatics Research 2010;16(4):253-259
OBJECTIVES: Heart failure (HF) is a progressive syndrome that marks the end-stage of heart diseases, and it has a high mortality rate and significant cost burden. In particular, non-adherence of medication in HF patients may result in serious consequences such as hospital readmission and death. This study aims to identify predictors of medication adherence in HF patients. In this work, we applied a Support Vector Machine (SVM), a machine-learning method useful for data classification. METHODS: Data about medication adherence were collected from patients at a university hospital through self-reported questionnaire. The data included 11 variables of 76 patients with HF. Mathematical simulations were conducted in order to develop a SVM model for the identification of variables that would best predict medication adherence. To evaluate the robustness of the estimates made with the SVM models, leave-one-out cross-validation (LOOCV) was conducted on the data set. RESULTS: The two models that best classified medication adherence in the HF patients were: one with five predictors (gender, daily frequency of medication, medication knowledge, New York Heart Association [NYHA] functional class, spouse) and the other with seven predictors (age, education, monthly income, ejection fraction, Mini-Mental Status Examination-Korean [MMSE-K], medication knowledge, NYHA functional class). The highest detection accuracy was 77.63%. CONCLUSIONS: SVM modeling is a promising classification approach for predicting medication adherence in HF patients. This predictive model helps stratify the patients so that evidence-based decisions can be made and patients managed appropriately. Further, this approach should be further explored in other complex diseases using other common variables.
Heart
;
Heart Diseases
;
Heart Failure
;
Humans
;
Medication Adherence
;
New York
;
Patient Compliance
;
Patient Readmission
;
Support Vector Machine
;
Surveys and Questionnaires
3.Comparison of landmark positions between Cone-Beam Computed Tomogram (CBCT) and Adjusted 2D lateral cephalogram.
Soo Jung SON ; Youn Sic CHUN ; Minji KIM
The Journal of Korean Academy of Prosthodontics 2014;52(3):222-232
PURPOSE: This study aims to investigate if 2D analysis method is applicable to analysis of CBCT by comparing measuring points of CBCT with those of Adjusted 2D Lateral Cephalogram (Adj-Ceph) with magnification adjusted to 100% and finding out at which landmarks the difference in position appear. MATERIALS AND METHODS: CBCT data and Adj-Ceph (100% magnification) data from 50 adult patients have been extracted as research objects, and the horizontal (Y axis) and vertical (Z axis) coordinates of landmarks were compared. Landmarks have been categorized into 4 groups by the position and whether they are bilaterally overlapped. Paired t-test was used to compare differences between Adj-Ceph and CBCT. RESULTS: Significant difference was found at 11 landmarks including Group B (S, Ar, Ba, PNS), Group C (Po, Or, Hinge axis, Go) and Group D (U1RP, U6CP, L6CP) in the horizontal (Y) axis while all the landmarks in vertical (Z) axis showed significant difference (P<.05). As a result of landmark difference analysis, a meaningful difference with more than 1 mm at 13 landmarks were indentifed in the horizontal axis. In the vertical axis, significant difference over 1 mm was detected from every landmark except Sella. CONCLUSION: Using the conventional lateral cephalometric measurements on CBCT is insufficient. A new 3D analysis or a modified 2D analysis adjusted on 19 landmarks of the vertical axis and 13 of the horizontal axis are needed when implementing CBCT diagnosis.
Adult
;
Axis, Cervical Vertebra
;
Diagnosis
;
Humans
4.The Effect of Voice Therapy Applying Self-Regulation Concepts on Dysphonia Patients
Chang Yoon LEE ; Soo Youn AN ; Hee Young SON
Journal of the Korean Society of Laryngology Phoniatrics and Logopedics 2019;30(1):15-20
BACKGROUND AND OBJECTIVES: The goal of this study is to present a strategy for improving the self-regulation (SR) ability and facilitating the change of vocal behavior by applying voice therapy using the SR concept to the patients with vocal cord nodule and muscle tension dysphonia. MATERIALS AND METHOD: The subjects were 80 patients and 80 patients who were diagnosed with muscle tension dysphonia and vocal nodules. As a control group, the results were compared among patients with the same dysphonia without using SR strategies. The concept of SR before voice therapy was explained to the patients, and the treatment was divided into three stages according to the goal of voice therapy. The treatment stages consist of 1) skill acquisition, 2) habit formation, and 3) habit changes. voice therapy was performed by applying SR strategies such as goal implementation intentions and a less routine behavior. Patient's dropout rates were measured to compare the adherence of voice therapy. RESULTS: Significant improvement was seen in all groups receiving voice therapy. However, in the group using the SR strategy, the voice analysis results showed a relatively low dropout rate of voice therapy. In the generalization confirmation stage, patients who applied SR concept showed better results. SR strategy did no longer be necessary to maintain newly adopted vocal behavior. CONCLUSION: The results of this study show that SR is one of the cognitive factors that can have a significant impact on the outcome of voice therapy, and also has a positive impact on the acquisition and generalization of new skills. A better understanding of SR and the development of therapeutic strategies using it will play an important role in solving voice problems in clinical settings.
Dysphonia
;
Generalization (Psychology)
;
Humans
;
Intention
;
Methods
;
Muscle Tonus
;
Self-Control
;
Vocal Cords
;
Voice
5.A Case of Colon Cancer Associated with Streptococcus gallolyticus Subspecies pasteurianus Bacteremia.
Yu Ho LEE ; Soo Youn MOON ; Mi Suk LEE ; Jun Seong SON
Korean Journal of Medicine 2013;85(6):644-647
Streptococcus Gallolyticus subspecies pasteurianus is a biotype II/2 of Streptococcus bovis. Although there is a clear correlation between Streptococcus bovis bacteremia and the risk of developing colon cancer, the relationship between Streptococcus gallolyticus subspecies pasteurianus bacteremia and colon cancer is not clear. We report a 53-year-old female who initially presented with fever and low back pain. Streptococcus gallolyticus subspecies pasteurianus was isolated in blood cultures, so we performed a colonoscopy and discovered colon cancer.
Bacteremia*
;
Colon*
;
Colonic Neoplasms*
;
Colonoscopy
;
Female
;
Fever
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Humans
;
Low Back Pain
;
Middle Aged
;
Streptococcus bovis
;
Streptococcus*
6.Two Cases of Neuropathy by Methyl Bromide Intoxication during Fumigation.
Tae Hyuk PARK ; Jung Il KIM ; Ji Eun SON ; Jong Kuk KIM ; Hyung Soo KIM ; Kap Yeol JUNG ; Joon Youn KIM
Korean Journal of Occupational and Environmental Medicine 2000;12(4):547-553
OBJECTIVES: To report two cases of neuropathy due to methyl bromide intoxication. METHODS: Workers, engaged in the fumigating process, complained fatigue, general weakness, ataxia, and hypersomnia. We evaluated them with blood tests, neurophysiologic studies and MRI and investigated their occupational history. RESULTS: Increased signal intensities were found in the medulla oblongata and paraver mian of cerebellum in MRI and after 11 days, high signal intensities were reduced in the following MRI. In the other case, polyneuropathy and rlght lower brainstem lesion were observed In the NCV and BAEP studies. CONCLUSIONS: We confirmed that worker's symptoms were related to methyl bromide exposure in the fumigation. It is necessary that we should evaluate present condition of fumigating process and prepare appropriate methods to protect workers engaged in the fumigation.
Ataxia
;
Brain Stem
;
Cerebellum
;
Disorders of Excessive Somnolence
;
Fatigue
;
Fumigation*
;
Hematologic Tests
;
Magnetic Resonance Imaging
;
Medulla Oblongata
;
Polyneuropathies
7.Comparison of the Efficacy of Antibiotic Monotherapy and Antibiotic Plus Alpha-blocker Combination Therapy for Patients with Inflammatory Chronic Prostatitis/Chronic Pelvic Pain Syndrome.
Chul Woong YOUN ; Kyung Chul SON ; Hyang Sik CHOI ; Dong Deuk KWON ; Kwangsung PARK ; Soo Bang RYU
Korean Journal of Urology 2008;49(1):72-76
PURPOSE: The objectives of this study was to compare the efficacy of antibiotic monotherapy with antibiotic plus alpha-blocker combination therapy for the treatment of inflammatory chronic pelvic pain syndrome (CPPS) patients. MATERIALS AND METHODS: Between October 2005 and May 2006, 69 patients who were diagnosed as CPPS(National Institutes of Health; NIH-catagory IIIa), were included in this study. The patients were randomly placed into two groups: group I was treated with gatifloxacin alone(35 patients), and group II was treated with gatifloxacin and doxazosin(34 patients) for 6 weeks. For all the patients, the urinalysis, expressed prostatic massage, the National Institute of Health-Chronic Prostatitis Symptom Index(NIH-CPSI) and a distal rectal examination(DRE) were performed at the initial visit. The NIH-CPSI was compared both before and after the treatment. RESULTS: On the initial diagnosis, the mean CPSI of the group I patients was 24.0+/-6.3, and that for the group II patients was 24.7+/-6.9. After the treatment, that of the group I was 16.6+/-5.4, and that of group II was 13.4+/-5.3. After 6 weeks of treatment, the changes in the total CPSI scores had significantly improved in group II compared with group I(p<0.05). A statistically significant improvement occurred in the pain score, the voiding symptom score and the quality of life in the group II compared with group I(p<0.05) CONCLUSIONS: This study suggests that combination therapy of antibiotic plus alpha-blocker would be more effective than antibiotic monotheraphy for treating patients with inflammatory chronic prostatitis/chronic pelvic pain syndrome.
Academies and Institutes
;
Adrenergic alpha-Antagonists
;
Anti-Bacterial Agents
;
Fluoroquinolones
;
Humans
;
Massage
;
Pelvic Pain
;
Prostatitis
;
Quality of Life
;
Urinalysis
8.The Effect of Voice Therapy in Unilateral Vocal Fold Paralysis.
Chang Yoon LEE ; Soo Youn AN ; Hyun CHANG ; Hee Young SON
Journal of the Korean Society of Laryngology Phoniatrics and Logopedics 2016;27(1):45-50
BACKGROUND AND OBJECTIVES: This study aims to conduct post-voice therapy to patients with unilateral vocal fold paralysis for vocal improvement, motility recovery and analyze the results. MATERIALS AND METHODS: Voice therapy was conducted to 13 patients who had shown response to voice therapy amongst 98 patients diagnosed with unilateral vocal fold paralysis. In order to be able compare before and after perceptual, acoustic and aerodynamic evaluations were conducted after voice therapy. Also, by using dysphagia checklist, we have verified whether if the patient had dysphagia prior to voice therapy. The therapy was conducted by improving the larynx movement and glottal contact, whilst removing hypertension of the supraglottic. RESULTS: All 13 patients who underwent voice therapy had shown improvements that are statistically significant from 4 scales excluding the S scale from auditory perception evaluation (p<0.05), with enhanced glottal contact. In acoustic evaluation, Jitter, Shimmer and NHR had shown significant improvement after voice therapy. MPT was also notably improved among aerodynamical evaluation (p<0.001). All 11 patients had with dysphagia prior to voice therapy reported to have improved swallowing functions. CONCLUSION: Application of adequate voice therapy to patients with unilateral vocal fold paralysis, is an effective method that might be employed in the initial phase. Especially, the voice therapy proposed in this study is expected to be useful for patients in hypertension status due to secondary compensation after initial paralysis, since it focuses on improving vocal symptoms in a calm state with the supraglottis sufficiently relaxed. Also, the therapy is expected to be effective for improving swallowing functions.
Acoustics
;
Auditory Perception
;
Checklist
;
Compensation and Redress
;
Deglutition
;
Deglutition Disorders
;
Humans
;
Hypertension
;
Larynx
;
Methods
;
Paralysis*
;
Vocal Cords*
;
Voice*
;
Weights and Measures
9.Atypical pulmonary artery sling with diffuse-type pulmonary arteriovenous fistula.
June HUH ; Jung Yun CHOI ; Youn Woo KIM ; Chung Il NOH ; Yong Soo YUN ; Chang Sung SON ; Young Chang TOCKGO
Journal of Korean Medical Science 1999;14(1):80-84
The case of a cyanotic infant with a rare combination of atypical pulmonary artery sling, imperforate anus, absence of the left kidney, interruption of the inferior vena cava, left side hemihypertrophy and diffuse-type pulmonary arteriovenous fistula is described. The clinical features were confusing, because of compounding abnormalities involving the respiratory tract and pulmonary circulation. The diagnostic approach to the etiology of cyanosis is discussed and the embryonic origin of pulmonary artery sling is reviewed.
Arteriovenous Fistula/ultrasonography
;
Arteriovenous Fistula/pathology*
;
Case Report
;
Human
;
Infant
;
Male
;
Pulmonary Artery/pathology*
10.Correlation between skeletal and dental changes after mandibular setback surgery-first orthodontic treatment: Cone-beam computed tomography-generated half-cephalograms.
Chang Hoon RHEE ; Youn Kyung CHOI ; Yong Il KIM ; Seong Sik KIM ; Soo Byung PARK ; Woo Sung SON
The Korean Journal of Orthodontics 2015;45(2):59-65
OBJECTIVE: To investigate skeletal and dental changes after application of a mandibular setback surgery-first orthodontic treatment approach in cases of skeletal Class III malocclusion. METHODS: A retrospective study of 34 patients (23 men, 11 women; mean age, 26.2 +/- 6.6 years) with skeletal Class III deformities, who underwent surgery-first orthodontic treatment, was conducted. Skeletal landmarks in the maxilla and mandible at three time points, pre-treatment (T0), immediate-postoperative (T1), and post-treatment (T2), were analyzed using cone-beam computed tomography (CBCT)-generated half-cephalograms. RESULTS: The significant T0 to T1 mandibular changes occurred -9.24 +/- 3.97 mm horizontally. From T1 to T2, the mandible tended to move forward 1.22 +/- 2.02 mm, while the condylar position (Cd to Po-perpendicular plane) shifted backward, and the coronoid process (Cp to FH plane) moved vertically. Between T1 and T2, the vertical dimension changed significantly (p < 0.05). Changes in the vertical dimension were significantly correlated to T1 to T2 changes in the Cd to Po-perpendicular plane (r = -0.671, p = 0.034), and in the Cp to FH plane (r = 0.733, p = 0.016), as well as to T0 to T1 changes in the Cp to Po-perpendicular plane (r = 0.758, p = 0.011). CONCLUSIONS: Greater alterations in the vertical dimension caused larger post-treatment (T2) stage skeletal changes. Studying the mandibular position in relation to the post-surgical vertical dimension emphasized the integral importance of vertical dimension control and proximal segment management to the success of surgery-first orthodontic treatment.
Cone-Beam Computed Tomography
;
Congenital Abnormalities
;
Female
;
Humans
;
Male
;
Malocclusion
;
Mandible
;
Maxilla
;
Retrospective Studies
;
Vertical Dimension