No abstract available.
Gonadal Dysgenesis, 46,XY*

OBJECTIVES: The purpose of this study was to determine whether pH and time has any influence on the degradation behavior of composite restoration by analyzing the leached monomers of dental composites qualitatively and quantitatively after storage in acetate buffer solution as a function of time using high performance liquid chromatography (HPLC) / mass spectrometer. MATERIALS AND METHODS: Three commercial composite restorative resin materials (Z-250, Heliomolar and Aeliteflo) with different matrix structure and filler composition were studied. Thirty specimens (7mm diameterx2mm thick) of each material were prepared. The cured materials were stored in acetate buffer solution at different pH (4, 7) for 1, 7 and 45days. As a reference, samples of unpolymerized composite materials of each product were treated with methanol (10 mg/ml). Identification of the various compounds was achieved by comparison of their mass spectra with those of reference compound, with literature data, and by their fragmentation patterns. Data were analysed statistically using ANOVA and Duncan's test. RESULTS: 1. Amounts of leached TEGDMA in Aeliteflo were significantly larger than those of UDMA in Z-250 and Heliomolar at experimental conditions of different storage time and pH variation (p < 0.001). 2. As to comparison of the amounts of leached monomers per sorage time, amounts of leached TEGDMA in Aeliteflo and UDMA in Z-250 and Heliomolar were increased in the pH 4 solution more significantly than in the pH 7 solution after 1day, 7days and 45days, respectively (p < 0.001). 3. In total amounts of all the leached monomers with storage times, the overall amounts of pH 4 extracts were larger than those of pH 7 extracts for all resin groups, but there was no significant difference (p > 0.05).
Chromatography, Liquid ; Composite Resins* ; Hydrogen-Ion Concentration* ; Methanol ; Polymers*

In May-Thurner syndrome (MTS), the left iliac vein is compressed by the right iliac artery, leading to restricted blood flow from the leg to the heart. MTS commonly manifests in young females; however, its occurrence in older adults necessitates verifying the possibility of malignancy. A 77-year-old female experienced leg swelling and discomfort for 1 week. Computed tomography angiography suggested extensive thrombosis in the left iliac vein. Despite heparin treatment, the thrombus persisted and required mechanical thrombectomy, balloon venoplasty, and stent placement for tight iliac vein stenosis. The procedure was successful;however a biopsy of thrombus revealed malignant cells. An underlying malignancy and a hypercoagulable state were identified as the contributing factors after further evaluations. This case underscores the importance for vigilant diagnosis of hypercoagulable conditions and malignancies in MTS, emphasizing the role of malignancy in the development of DVT and MTS.

In May-Thurner syndrome (MTS), the left iliac vein is compressed by the right iliac artery, leading to restricted blood flow from the leg to the heart. MTS commonly manifests in young females; however, its occurrence in older adults necessitates verifying the possibility of malignancy. A 77-year-old female experienced leg swelling and discomfort for 1 week. Computed tomography angiography suggested extensive thrombosis in the left iliac vein. Despite heparin treatment, the thrombus persisted and required mechanical thrombectomy, balloon venoplasty, and stent placement for tight iliac vein stenosis. The procedure was successful;however a biopsy of thrombus revealed malignant cells. An underlying malignancy and a hypercoagulable state were identified as the contributing factors after further evaluations. This case underscores the importance for vigilant diagnosis of hypercoagulable conditions and malignancies in MTS, emphasizing the role of malignancy in the development of DVT and MTS.

In May-Thurner syndrome (MTS), the left iliac vein is compressed by the right iliac artery, leading to restricted blood flow from the leg to the heart. MTS commonly manifests in young females; however, its occurrence in older adults necessitates verifying the possibility of malignancy. A 77-year-old female experienced leg swelling and discomfort for 1 week. Computed tomography angiography suggested extensive thrombosis in the left iliac vein. Despite heparin treatment, the thrombus persisted and required mechanical thrombectomy, balloon venoplasty, and stent placement for tight iliac vein stenosis. The procedure was successful;however a biopsy of thrombus revealed malignant cells. An underlying malignancy and a hypercoagulable state were identified as the contributing factors after further evaluations. This case underscores the importance for vigilant diagnosis of hypercoagulable conditions and malignancies in MTS, emphasizing the role of malignancy in the development of DVT and MTS.

In May-Thurner syndrome (MTS), the left iliac vein is compressed by the right iliac artery, leading to restricted blood flow from the leg to the heart. MTS commonly manifests in young females; however, its occurrence in older adults necessitates verifying the possibility of malignancy. A 77-year-old female experienced leg swelling and discomfort for 1 week. Computed tomography angiography suggested extensive thrombosis in the left iliac vein. Despite heparin treatment, the thrombus persisted and required mechanical thrombectomy, balloon venoplasty, and stent placement for tight iliac vein stenosis. The procedure was successful;however a biopsy of thrombus revealed malignant cells. An underlying malignancy and a hypercoagulable state were identified as the contributing factors after further evaluations. This case underscores the importance for vigilant diagnosis of hypercoagulable conditions and malignancies in MTS, emphasizing the role of malignancy in the development of DVT and MTS.

In May-Thurner syndrome (MTS), the left iliac vein is compressed by the right iliac artery, leading to restricted blood flow from the leg to the heart. MTS commonly manifests in young females; however, its occurrence in older adults necessitates verifying the possibility of malignancy. A 77-year-old female experienced leg swelling and discomfort for 1 week. Computed tomography angiography suggested extensive thrombosis in the left iliac vein. Despite heparin treatment, the thrombus persisted and required mechanical thrombectomy, balloon venoplasty, and stent placement for tight iliac vein stenosis. The procedure was successful;however a biopsy of thrombus revealed malignant cells. An underlying malignancy and a hypercoagulable state were identified as the contributing factors after further evaluations. This case underscores the importance for vigilant diagnosis of hypercoagulable conditions and malignancies in MTS, emphasizing the role of malignancy in the development of DVT and MTS.

OBJECTIVES: Power spectrum analysis decomposes the heart rate signal into its frequency components and facilitates separation of sympathetic (low frequency) and parasympathetic (high frequency) activity. In congestive heart failure, augmented sympathetic tone and decreased parasympathetic tone were found. Autonomic nervous system was normalized 6 months after myocardial infarction. So we compared the autonomic nervous system activity by the heart rate variability in congestive heart failure and old myocardial infarction. METHODS: The protocol involved 20 healthy subjects (Group 1), 5 congestive heart failure patients not caused by myocardial infarction (Group 2), 4 congestive heart failure patients due to myocardial infarction and 11 old myocardial infarction patients without heart failure. We took 24 hour Holter monitoring by Del Mar Avionic tape recorder. All Holter tapes were analyzed with use of Model 563 Stratascan Holter Analysis System. We computed power spectra on each 256 sec segment of each hour during 24 hour recording. So, RR interval, SD of RR interval by time domain, and LF, HF, LF/HF ratio, Total PSD by frequency domain were measured. RESULTS: In congestive heart failure, nocturnal HF peak and diurnal variation of LF/HF ratio was decreased relative to healthy subjects. Nocturnal HF peak in old myocardial infarction was not visualized. All of LF, HF and Total PSD in congestive heart failure and old myocardial infarction patients relative to healthy subjects. CONCLUSION: On heart rate variability analysis using by 24 hour Holter monitoring, abnormal autonomic nervous activity was demonstrated in congestive heart failure and old myocardial infarction patients relative to healthy subjects.
Autonomic Nervous System ; Electrocardiography, Ambulatory* ; Estrogens, Conjugated (USP)* ; Heart Failure* ; Heart Rate* ; Heart* ; Humans ; Myocardial Infarction* ; Spectrum Analysis

BACKGROUND: The incidence of Crohn's disease in the upper digestive tract, and especially in the stomach, is recently increasing. Focal inflammatory reaction without Helicobacter pylori (H. pylori) infection is thought to be the characteristic pathologic findings suggesting Crohn's disease in the stomach. Yet gastric involvement of Crohn's disease has not been studied in Korea. We studied the endoscopic and pathologic findings of patients with Crohn's disease in the stomach by taking biopsies. METHODS: Thirty patients with Crohn's disease who underwent gastroduodenoscopy followed by biopsies were included in the study. The pathology of the gastric biopsy specimens and the presence of H. pylori were evaluated. RESULTS: Among 30 cases, 22 cases (73.3%) were H. pylori negative and 8 cases (26.7%) were H. pylori positive. For the H. pylori negative cases, all but one cases showed pit abscess and focal lymphocytic collections in the antrum. Granulomas were found in 6 cases (20%) and they were exclusively located in the antrum. CONCLUSIONS: In the stomach, pit abscess and focal lymphocytic collections that are not associated with H. pylori infection are the characteristic pathologic findings found in Crohn's disease.
Abscess ; Biopsy ; Crohn Disease* ; Gastrointestinal Tract ; Granuloma ; Helicobacter pylori ; Humans ; Incidence ; Korea ; Pathology ; Stomach*

PURPOSE: As the National Health Insurance Service (NHIS) began to cover home oxygen therapy (HOT) services from 2006, it is expected that the new services have contributed to overall positive outcome of patients with chronic obstructive pulmonary disease (COPD). We examined whether the usage of HOT has helped slow down the progression of COPD. METHODS: We examined hospital claim data (N=10,798) of COPD inpatients who were treated in 2007~2012. We performed chi2 tests to analyze the differences in the changes to respiratory impairment grades. Multiple logistic regression analysis was used to identify factors that are associated with the use of HOT. Finally, a generalized linear mixed model was used to examine association between the HOT treatment and changes to respiratory impairment grades. RESULTS: A total of 2,490 patients had grade 1 respiratory impairment, and patients with grades 2 or 3 totaled 8,308. The OR for use of HOT was lower in grade 3 patients than others (OR: 0.33, 95% CI: 0.30~0.37). The maintenance/mitigation in all grades, those who used HOT had a higher OR than non-users (OR: 1.41, 95% CI: 1.23~1.61). CONCLUSION: HOT was effective in maintaining or mitigating the respiratory impairment in COPD patients.
Home Care Services ; Humans ; Inpatients ; Logistic Models ; Lung Diseases, Obstructive* ; National Health Programs ; Oxygen Inhalation Therapy ; Oxygen* ; Pulmonary Disease, Chronic Obstructive ; Respiratory Mechanics