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A Clinical Study on Dyspneic Patients Admitted through Emergency Room
Won Tae Chung,Gye Ik Sohn,Jang Geun Park,Soon Kew Park,Young Kee Shin Korean Society of Critical Care Medicine 1987 Acute and Critical Care Vol.2 No.1
Authors obtained the following results through the clinical study on 129 cases of dyspneic patients, admitted through the Emergency Room of Pusan National University Hospital from January 1984 to June 1985. 1) The study group was 129 patients with dyspnea, male 81 caaes(62.8%) and female 48 cases(37.2%). Male to female ratio was 1.7:l. 2) Underlying diseases were pulmonary diseases in 61 cases(47,3%), cardiovascular diseases in 56 cases(43.4%). 3) The most frequently associated symptoms with dyspnea were coughing in pulmonary diseases and chest pain in cardiovascular diseases. 4) Respiratory rate was much more markedly increased in cardiovascular diseases than in pulmonary diseases. 5) Abnormal breathing sound was noted in 85 eases(65.9%), and arrythmia and cardiac murmur were noted in 8 cases(6.2%) at auscultation. 6) Mental status was alert in most of the cases(80.6%). 7) Pulmonary function test revealed the more marked impairment in pulmonary diseases, and there were more significant differences in FEV and FEF25 ~75%.
An fMRI Study of Cognitive Function during Hyperoxia
Chung Soon-Cheol,Kim Ik-Hyeon,Tack Gye-Rae,Lee Soo Yeol,Sohn Jin-Hun The Korean Society of Medical and Biological Engin 2005 의공학회지 Vol.26 No.1
This study aimed to investigate the hypothesis that administration of the air with 30% oxygen compared with normal air (21% oxygen) enhances cognitive functioning through increased activation in the brain. Seventeen college students (righthanded, average age of 24.3) were selected as subjects for this study. An oxygen supply equipment that provides 21% and 30% oxygen at a constant rate of 8L/min was developed. In order to measure the performance level of visuospatial and verbal cognition, two psychological tests were developed. The experiment consisted of two runs, one for cognition task with normal air (21% oxygen) and the other for cognition task with hyperoxic air (30% oxygen). Visuospatial and verbal tasks were presented while brain images were scanned by a 3T fMRI system using the single-shot EPI method. The results showed that there was an improvement in performance and also increased activation in several brain areas in the higher oxygen condition. These results suggest that while performing cognitive tasks, high concentrations of oxygen administration make oxygen administration sufficient, thus making neural network activate more, and the ability to perform cognitive tasks increase.