A study on 214 stone-miners that have been working in the stone-mine in the dry season during 1998-1999 in B×nh §Þnh has shown that 50 persons experienced respiratory functional disorder; 164 persons had a normal respiratory function. Most of respiratory functional disorders were limited respiratory functional disorder. There was difference of respiratory functional disorder between groups of working ages.
Respiratory Function Tests

The principle of human respiratory function test is decleared. The innovative testing parameters is proposed to optimize traditional calculation parameters based on a respiratory function test of one-time max respiratory flow and pressure. The parameters of respiratory function evaluation was preliminarily verified, and we have already got the expected experimental result. The research can be a valuable reference for the following respiratory function test in future.
Algorithms ; Humans ; Respiratory Function Tests

No abstract available.
Humans ; Pneumonectomy* ; Respiratory Function Tests*

Studying 56 asthma patients, results showed that prevalence of asthma in stage 1 in 3-to-7-years old children was 42%. 12,5% of asthma children experienced chronic cough. 80.5% asthma children had medical history of allergy. House dust mite is a leading cause of asthma (51% patients had positive Prick test). In group 3-7 years old, 37.73% patients experienced obstructive syndrome, among them bronchial obstruction 3.5%, peripheral obstruction 28.79%, total obstruction 5.36%. 57.1% asthma children had improvement of pulmonary ventilation after using bronchodilators. 12.5% patients had increased resistance of airway that was found by breathing interruption method without cooperation of patients
Asthama ; child ; Respiratory Function Tests

On 200 Vietnamese subjects, IVC was measured. Obtained results could be used to complete the Vietnam National standards of lung function
Respiratory Function Tests ; Inspiratory Capacity

PURPOSE: To determine the correlation between areas of decreased parenchymal attenuation seen in cases of bronchiectasis, and the severity and extent of the condition, as revealed by HRCT and the plmonary function test (PFT). MATERIALS AND METHODS: The findings of forty-five patients with bronchiectasis who had undergone PFT and HRCT were retrospectively analysed. CT scores were calculated according to the severity and extent of the condition, and areas of low attenuation, and the correlation coefficients between these were determined. Bronchiectasis was classified as either cylindrical or cystic, and using Student's t test, the statistical significance of the results of the PFT were determined. RESULT: The severity and extent of bronchiectasis correlated with the extent of areas of low attenuation (r > .45, p < .05), with especially significant correlation between the extent of these areas and the extent of the condition (r =.84, p=.0001). Correlation was greater in cases involving the cylinlrical variety than the cystic. The extent of low attenuation areas correlated with FEV1, FVC, MMEF, and DLCO (r > .44, p < .01). The functional parameters of the PFT which help differentiate between cylindrical and cystic bronchiectasis are FEV1, FVC, MMEF, DLCO (p < .01), RV, and TLC (p < .05). CONCLUSION: In patients with bronchiectasis, the extent of the condition correlated closely with the extent of low attenuation, and the latter, especially in cases of cylindrical bronchiectasis, showed significant correlation with the extent of abnormalities revealed by the pulmonary function test.
Bronchiectasis* ; Humans ; Respiratory Function Tests* ; Retrospective Studies

No abstract available.
Lung* ; Needles* ; Pneumothorax* ; Respiratory Function Tests*

No abstract available.
Asthma* ; Dyspnea* ; Humans ; Respiratory Function Tests*

Cardio-pulmonary responses to a given step-up exercise test were studied in 43 patients who previously received various thoracic operations such as pleural decortication, one or two segmental resections, right or left upper lobectomy, plombage or pneumonectomy. Fourteen control subjects were also studied for comparison. Following a 30 minute rest, the step-up exercise was performed to heights of 20, 30 and 40cm, in that order, for 8 to 10 min. at each height. During the rest and the steady-state exercise period, the expired gas was collected for a period of 5 minutes for the determinations of the minute volume, the O2 consumption and the CO2 Output. Alveolar gas samples were a1so taken following the expired gas collection. The heart rate and blood pressure were also checked during the rest and immediately after each exercise. Various cardio-pulmonary functions of the patient at rest were little different from those of the control, except the heart rate which tended to be higher in the patient than in the control. Although the work capacity of the patient was lower than in the control, most patients were able to complete the required exercise test. However, in carrying out a given exercise load, the patient groups had a greater minute volume, the respiratory rate, the O2 consumption and the CO2 output as compared to the control, indicating that the mechanical efficiency is considerably lowered in the patient. Of various patient groups, the work performance was most limited in the pneumonectomy group while the group with one or two segmental resections was little affected. It is suggested that the patient with one or two segmental resections may be allowed to engage in physical activity up to 700 kg-m/min or more while those with pneumonectomy should not exert themselves above 500 k-gm/min.
Adult ; *Exercise Test ; *Heart Function Tests ; Human ; Male ; Pleura/*surgery ; *Pneumonectomy ; *Respiratory Function Tests

OBJECTIVES: To investigate the pulmonary function changes of ozone exposure in Corona and Slitter workers exposed to an ozone level ranging from 0.022~0.061 ppm. METHODS: Forty-two subjects were exposed for 8hrs to ozone every day. We perfomed pulmonary function testing immediately before and after work and self-administered, portable peak flow meter measurements were self-conducted by the workers over a 5-day (Monday to Friday) period. RESULTS: Ozone concentrations in the workplace ranging from 0.050~0.061 ppm at Corona and 0.022~0.023 ppm at Slitter in 2006. A small decrement in forced-vital capacity were observed among Corona workers from 93.9% to 91.3% (p=0.012) and also in employment duration below ten years. We found no significant differences in before and after FVC and FEV1 among Slitter workers. All daily (Monday to Friday) peak expiratory flow rates declined in magnitude after two days of ozone exposure, compared with first day exposure. CONCLUSION: We concluded that daily ozone exposure in the workplace slightly decreased pulmonary function and that PEFR variability is greatest on the 2nd day of ozone exposure.
Employment ; Ozone* ; Peak Expiratory Flow Rate ; Respiratory Function Tests