PURPOSE: The purpose of this study was to evaluate the plain chest radiological findings of silicosis based on ILO 1980 Classification. METHODS AND MATERIALS: Author studied the plain chest films of 200 patients with silicosis in Taebaek district and silicotic lesions were classified bascd on ILO 1980 Classification. There were 196 males and 4 females among them(mean age;56.2 years). The mean duration of dust cxposurc was 18.8 years. Small and large opacities were classified according to their profusion, size and shape, and size category, respectively. Other associated findings were also analyzed. RESULTS: Amont 200 patients there were 153 cases of small opacities and 47 cases of large opacities. Category 2/2(21.6%) and q/q type(22.9%) were most common for small opacities, according to their profusion, size and shape. Category B is most common for large opacities, according to their size. Incidence and size of large opacities increased with duration of dust exposure. Associated findings of hilar eggshell calcifications(5.5%), calcified silicotic nodules(3.5%), active pulmonary tuberculosis(10.5%) and pleural abnormality(9.0%) were domonstrated, too. CONCLUSION: Plain chest radiological findings of silicosis were fine irrcgular and/or round small opacities in Ifie early phasc, but if advanced, large opacities of progressive massive fibrosis and focal cmphysematous appcared in the upper lung fields. Hilar lymphadenopathy and eggshell calcifications, active pulmonary tuberculosis, pleural thickening and calcifications could be associated.
Classification* ; Dust ; Female ; Fibrosis ; Humans ; Incidence ; Lung ; Lymphatic Diseases ; Male ; Silicosis* ; Thorax* ; Tuberculosis, Pulmonary

No abstract available.
Humans ; Lymphocyte Subsets* ; Lymphocytes*

This paper describes to design and to examine the mechanical characteristics of high frequency jet ventilator. The device consists of Phase lock loop (PLL) system, solenoid valve driving control part and Air regulating system. This study is carried out by changing several factors such as endotracheal tube (E.T. tube) diameter, injector cannula diameter, 1%, and frequency (breaths/min.) having direct effects on the gas exchange as well as parameters of the entrained gas by venturi effect, so as to measure the tidal volume and minute volume. This system characteristics were as follows: 1) Frequency: 6-594 bpm 2) Inspiration time: 1-99% 3) Variance of input air pressure: 1-30 PSI
Air Pressure ; Catheters ; Tidal Volume ; Ventilators, Mechanical*

The chronic active or aggressive hepatitis B, in which periportal inflammation(piecemeal necrosis) is conventionally accepted as the pattern of progression to cirrhosis', implies little concern with intralobular necroinflammation as a process responsible for aggravation and progression. Some published observations, however, refer to episodes of acute necrotizing bouts(subacute hepatic necrosis) have been reported". For technical reasons, relatively few sequential biopsy studies of chronic hepatitis B are available and particularly, initial acute hepatitis B is barely documented since biopsies are now rarely perfomed in acute stages of hepatitis4. Moreover, most published sequential studies are complicated by therapeutic intervention. The availability of Korean sequential biopsy specimens and the increasing interest in parenchymal changes in the evolution of hepatitis B encouraged the description of the progression of acute and chronic hepatitis B to cirrhosis. During the long-term follow-up study, acute bouts of intralobular parenchymal necroinflammation are observed whenever the stage of aggravation is caught and the biopsy is possible. Whatever the result of these studies, the observation presented suggests a major role of parenchymal changes in the evolution of chronic hepatitis B and this experience focuses on the important lesions of the lobular parenchyma in classification and evaluation of chronic hepatitis'. Seven patients are selected on the basis of elevated S-ALT level, and submit to repated needle biopsies during a 6-month period". Of these, 2 cases show chronic active hepatitis with early cirhosis constantly, and in 5 cases CAH appear 1 or 2 times in each case during the follow-up period. In clinical follow-up after the sequential biopsies, these 7 patients were all healthy at least for an average of 18.6 years ranging from 14 to 27 years, except for one who developed into HCC without complication of cirrhosis. Thus, while the sample size of this study is small, continuous piecemeal necrosis seems not to be a pattern of progression to cirrhosis. In conclusion, acute and chronic hepatitis B experienced in Korea appear to progress to cirrhosis by means of repeated acute episodic bouts of intralobular necroinflammation, and the conventional concept that continuous progress by piecemeal necrosis seems not to hold true.
Biopsy ; Biopsy, Needle ; Classification ; Fibrosis* ; Follow-Up Studies ; Hepatitis B ; Hepatitis B, Chronic* ; Hepatitis, Chronic* ; Humans ; Korea ; Necrosis ; Sample Size

The anxiety disorders make up one of the most common groups of psychiatric disorders. Anxiety is an alerting signal ; it warns of impending danger and enables a person to take measures to deal with a threat. Three major schools of psychological theory-psychoanalytic, behavioral, and existential-have contributed theories about the causes of anxiety. Many drugs are effective in managing distressing signs and symptoms associated with anxiety disorders. As the symptoms are controlled by medication, patients are reassured and develop confidence that they will not be incapacitated by the disorder. Benzodiazepines are useful in panic disorder, phobias, and agitation. In general, benzodiazepines act as hypnotics at high doses and as anxiolytics or sedatives at low doses. The benzodiazepines have become the sedative-hypnotic drugs of first choice because they have a higher therapeutic index and significantly less abuse potential than do many of other sedative-hypnotics. The most common adverse effect of benzodiazepines is drowsiness. Some patients also experience dizziness and ataxia. The most serious adverse effects of benzodiazepines occur when other sedative substances are taken concurrently. When benzodiazepines are used for long periods, they usually cause significant tolerance, dependence, or withdrawal effects. Overdoses with benzodiazepines alone have a predictably favorable outcome. The benzodiazepines should be started at a low dosage, and the patient should be informed about the drug’s sedative properties and abuse potential. Serotonin-specific reuptake inhibitors (SSRIs) have a much more favorable profile of adverse effects and have significantly broadened the horizon for pharmacological treatment of anxiety disorder. Three fourths of patients experience no adverse effects at low starting doses, and doses may be increased relatively rapidly in these patients. In the remaining one fourth of patients, most of the SSRIs’ adverse effects appear within the first 1 to 2 weeks, and they generally subside or resolve spontaneously if the drugs are continued at the same dose.
Anti-Anxiety Agents ; Anxiety ; Anxiety Disorders ; Ataxia ; Benzodiazepines ; Dihydroergotamine ; Dizziness ; Humans ; Hypnotics and Sedatives ; Panic Disorder ; Phobic Disorders ; Sleep Stages

No abstract available.

No abstract available.
Tendon Transfer* ; Tendons*

No abstract available.
Heart Septal Defects, Ventricular*

Congenital Abnormalities ; Dentofacial Deformities ; Epidemiologic Studies ; Female ; Humans ; Hypertrophy ; Male ; Orthognathic Surgery ; Osteotomy, Sagittal Split Ramus ; Prognathism ; Retrospective Studies

Aneurysmal benign fibrous histiocytoma(ABFH) is a relatively rare variant and has a distinctive histopathological features, that is collections of capillaries, foci of hemorrhage, siderophages, and foamy macrophages surrounding cleft-like and cavernous blood filled spaces in the tumor. But, in spite af the distinctive features, it is not infrequently confused with malignant melanoma, angiomatoid malignant fibrous histiocytoma, and vascular tumors such as spindle cell hemangioendothelioma, nodular Kaposi's sarcoma and angiosarcoma. We report a case of ABFH developed on the left upper extremity of a 41-year-old man.
Adult ; Aneurysm* ; Capillaries ; Hemangioendothelioma ; Hemangiosarcoma ; Hemorrhage ; Histiocytoma, Benign Fibrous* ; Histiocytoma, Malignant Fibrous ; Humans ; Macrophages ; Melanoma ; Sarcoma, Kaposi ; Upper Extremity