Korean Journal of Aerospace and Environmental Medicine.2000;10(3):293-294.
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Korean Journal of Aerospace and Environmental Medicine
2002 (v1, n1) to Present ISSN: 1671-8925
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Conceptual Model of Human Factors in Aviation.
Korean Journal of Aerospace and Environmental Medicine.2000;10(3):267-273.
Psychological Stress Status and it's related Factor in Pilots.
Korean Journal of Aerospace and Environmental Medicine.2000;10(3):255-265.
BACKGROUND: Pilots should maintain optimal state of physical and psychological well-being for preventing aircraft accidents. Major cause of aircraft accidents was human factors, and physical well-being are closely related to psychological health. Thus, we evaluate psychological stress status of pilots to manage and promote psychological well-being of pilots in Republic of Korea Air Forces. METHODS: A self-administered questionnaire was designed. It dealt with demographic, medical utilization and health habit variables. The section of psychological stress was the 60-item version of Goldberg's general health questionnaire(GHQ-60). From September 1996 to October 1996, 896 questionnaires were distributed to the pilots. RESULTS: The degree of stress were statistically significant in the age, marital status, educational attainment, annual income, hospital admission, hours of sleep, having breakfast, regular exercise, smoking and alcohol drinking variables; (a) pilots in younger, unmarried, and low-income group had more stress; (b) pilots have hospital admission in a recent month including his family member had more stress; (c) pilots in sleeping 9 and over hours, having breakfast sometimes, no regular exercise, smoking and frequent alcohol drinking group had the highest level of stress. In potential distress group, hospital admission including his family member( adjusted OR = 2.15, 95% CI : 1.15-4.02), lack of sleeping( adjusted OR = 2.78, 95% CI : 1.57-4.94), irregular exercise(adjusted OR=2.42, 95% CI: 1.40-4.18) and frequent alcohol drinking(adjusted OR=2.79, 95% CI: 1.05-7.41) were estimated as risk factors. CONCLUSIONS: This study suggested that we should give a special attention to manage the stress of pilots in younger age and, in potential distress group, pilot had hospital admission including his family member, lack of sleeping, irregular exercise and frequent alcohol drinking in relation to maintain and promote psychological health of pilots in air forces.
Aircraft ; Alcohol Drinking ; Breakfast ; Humans ; Marital Status ; Republic of Korea ; Risk Factors ; Single Person ; Smoke ; Smoking ; Stress, Psychological* ; Surveys and Questionnaires
Aircraft ; Alcohol Drinking ; Breakfast ; Humans ; Marital Status ; Republic of Korea ; Risk Factors ; Single Person ; Smoke ; Smoking ; Stress, Psychological* ; Surveys and Questionnaires
Evaluation method for vinyl chloride exposed workers.
Korean Journal of Aerospace and Environmental Medicine.2000;10(3):247-254.
BACKGROUND: This study was conducted to evaluate vinly chloride exposure in vinyl chloride and poly vinyl chloride manufacturing factories. The object of this study was compare two different type of air sampling method that of, NIOSH and OSHA recommended and Investigate quantitative correlation between level of vinyl chloride exposure and urinary thiodiglycolic acid excretion. METHODS: Air sampling was conducted by two method and sampling mediums were located at workers breathing zone in the same location. Sampling mediums were changed in 60 minute interval and sampling pumps were recalibrated at the same time. Urine was collected before and end of shift were stored frozen and determined by GC/FID analysis. RESULTS: In NIOSH method, time weighted average was 3.562 +/- 2.898 ppm and OSHA method time weighted average was 4.051 +/- 3.700 ppm. Concentration of urinary TdGA in before shift was 0.527 +/- 0.828 g/g creatinine and end of shift was 4.190 +/- 7.665 mg/g creatinine. Difference of urinary TdGA between end of shift to before shift was 3.662 +/- 7.865 mg/g creatinine. In NIOSH method, correlation coefficient between 8hour-time weighted average (8hrs-TWA) and urinary concentration of TdGA was r=0.666. and last period vinyl chloride level (6th-TWA) and urinary TdGA concentration was r=0.972. In OSHA method, correlation coefficient between last period vinyl chloride level (6th-TWA) and urinary concentration of TdGA was r=0.976 and this was highest value. CONCLUSION: There was no statistically significant difference in NIOSH method and. OSHA method. A correlation were found between level of vinyl chloride exposure and urinary thiodiglycolic acid excretion. Also, vinyl chloride exposure had significantly effected on the urinary thiodiglycolic acid excretion.
Creatinine ; National Institute for Occupational Safety and Health (U.S.) ; Respiration ; United States Occupational Safety and Health Administration ; Vinyl Chloride*
Creatinine ; National Institute for Occupational Safety and Health (U.S.) ; Respiration ; United States Occupational Safety and Health Administration ; Vinyl Chloride*
Electro-Acupuncture Treatment of Aerotitis Media for Chinese Aviators.
Korean Journal of Aerospace and Environmental Medicine.1999;9(3):326-331.
Aerotitis media occurs frequently among flyers. 40 cases have been treated with electro- acupuncture in our hospital with satisfactory results. Xiaguan was selected as local point and Hegu as distal point. The patients were needled once a day or every other day. The total rate of effectiveness was 90.0%. According to Western medicine, this disease is due to poor pressure-equilibrating function of the Eustachian tube. The mechanism of treating this disease was explained by traditional Chinese medicine and western medicine theory.
Acupuncture ; Asian Continental Ancestry Group* ; Eustachian Tube ; Humans ; Medicine, Chinese Traditional
Acupuncture ; Asian Continental Ancestry Group* ; Eustachian Tube ; Humans ; Medicine, Chinese Traditional
Korean Journal of Aerospace and Environmental Medicine.1999;9(3):313-325.
Simple reaction time, digit span, digit symbol, Santa Ana dexterity test, Benton visual retention test, and pursuit aiming of the WHO NCTB (neurobehavioral core test battery) were administered to the 96 males occupationally non-exposed to neurotoxic chemicals. All subjects do not have any disease and head trauma and do not take medicine recently. Multiple regression analysis was done for establishing predict equation to estimate normal ranges of tests for males. Age was main independent variable affected all tests except for simple reaction time. Digit symbol was affected by educational level. Santa Ana dexterity, non-preferred hand was affected by alcohol drinking. Santa Ana dexterity, preferred hand and wrong dot of pursuit aiming were affected by smoking.
Alcohol Drinking ; Craniocerebral Trauma ; Hand ; Humans ; Male* ; Occupations* ; Reaction Time ; Reference Values ; Smoke ; Smoking
Alcohol Drinking ; Craniocerebral Trauma ; Hand ; Humans ; Male* ; Occupations* ; Reaction Time ; Reference Values ; Smoke ; Smoking
Effect of GABA on Synaptic Currents in Cultured Hippocampal Neurons in Rats.
Korean Journal of Aerospace and Environmental Medicine.1999;9(3):302-312.
GABA (-aminobutyric acid) is one of the important neurotransmitters in the central nervous system of mammals and its action is variable according to the maturation phases of neurons. The neurons of early cultural days (less than 7 days) have been used for a developing neuronal model, while the neurons of later days (over 3 weeks) used for a mature model. This study was performed to investigate the electrophysiological property of GABAergic synapses in the hippocampal neurons cultured for 10 to 14 days which are considered to be transitional period between the developing and the mature phases. Membrane potential was depolarized and a inward transmembrane current was induced by 20 M GABA infusion. Frequency and amplitude of spontaneous postsynaptic currents (PSCs) were inhibited during the GABA infusion, but decay time constant was not affected significantly. In most hippocampal neurons, no GABAergic PSCs were observed during the administration of 0.5 M TTX, 50 M APV and 10 M CNQX. In the neurons counting 25% approximately, however, small persisted PSCs showed the existence of GABAergic synapses which were blocked by 10 M bicuculine. As the functional property of isolated GABAergic synapses, amplitude of GABAergic PSCs were diminished, and decay time constants and rising times were prolonged during the 20 M GABA infusion in all recorded neurons. In conclusion, approximately 25% of the hippocmpal neurons cultured 10 to 14 days used GABA as well as glutamate as a neurotransmitter. It seems that the GABAergic synapses composed of functionally homogenous GABAA receptors act as inhibitory modulator of the excitatory signal transmission.
6-Cyano-7-nitroquinoxaline-2,3-dione ; Animals ; Central Nervous System ; gamma-Aminobutyric Acid* ; Glutamic Acid ; Mammals ; Membrane Potentials ; Neurons* ; Neurotransmitter Agents ; Rats* ; Synapses ; Synaptic Potentials
6-Cyano-7-nitroquinoxaline-2,3-dione ; Animals ; Central Nervous System ; gamma-Aminobutyric Acid* ; Glutamic Acid ; Mammals ; Membrane Potentials ; Neurons* ; Neurotransmitter Agents ; Rats* ; Synapses ; Synaptic Potentials
Diagnostic value of serologric test for detection of Helicobacter pylori infection.
Korean Journal of Aerospace and Environmental Medicine.1999;9(3):291-301.
BACKGROUND: Ever since Helicobacter pylori was discovered in 1983 by Warren and Marshall, many studies were conducted resulting in drastic change of the previous concept of gastrointestinal disorders and its treatment. Most people in developing countries are considered to be exposed to the organism at a very early age, being more susceptible to infection. This study was done to find out the diagnostic value of serology antibody test for Helicobacter pylori infection by comparing differences in those checked positive for H. pylori relative to their symptoms and findings on endoscopy, biopsy, and barium swallow. METHODS: Subjects totaling 1240 who visited the Health Promotion Center of a university hospital were surveyed with questionnaire and were performed serology antibody test for H. pylori. 532 subjects underwent endoscopy and biopsy and in 708 subjects barium swallow was performed. All subjects were compared with respect to gastrointestinal symptoms, findings of pathology from the endoscopic and radiologic procedures with their antibody test results and titration. RESULTS: Among 1240 patients, 804 (64.8%) were positive for Helicobacter pylori antibody. There were 449 males (68%), and 355 females (61%), which was statistically significant (p< 0.05).There was no difference in the positive rates of H. pylori according to smoking, drinking, and exercise. Higher prevalence of family history for gastric cancer was shown among those positive for H. pylori (p< 0.01). There was no difference noted in relation to gastric symptoms or past history of gastrointestinal disorders in the two groups. Relative to the gastric symptoms complained by the patients, the findings on endoscopy, biopsy and radiologic study, most of those checked positive for H. pylori were shown to have antibody titers in the range of 20 to 40 units/mL with 83.1% for symptoms, 83.6% for endoscopy, 84.8% for biopsy, 81.7% for barium swallow. CONCLUSION: There was no significant difference among those positive and negative for serology antibody test with respect to gastrointestinal symptoms, findings on endoscopy, biopsy, and barium swallow in this study. But because H. pylori is associated with most of the gastrointestinal pathology, testing H. pylori with serology antibody method can be beneficial and useful for its accuracy in primary care setting where further investigation is not possible.
Barium ; Biopsy ; Developing Countries ; Drinking ; Endoscopy ; Female ; Health Promotion ; Helicobacter pylori* ; Helicobacter* ; Humans ; Male ; Pathology ; Prevalence ; Primary Health Care ; Smoke ; Smoking ; Stomach Neoplasms ; Surveys and Questionnaires
Barium ; Biopsy ; Developing Countries ; Drinking ; Endoscopy ; Female ; Health Promotion ; Helicobacter pylori* ; Helicobacter* ; Humans ; Male ; Pathology ; Prevalence ; Primary Health Care ; Smoke ; Smoking ; Stomach Neoplasms ; Surveys and Questionnaires
A Report of the 47th International Congress of Aviation and Space Medicine in Budapest, Hungary.
Korean Journal of Aerospace and Environmental Medicine.1999;9(3):288-290.
Human Factors in Aviation Industry.
Korean Journal of Aerospace and Environmental Medicine.1999;9(3):285-287.
Country
Republic of Korea
Publisher
ElectronicLinks
Editor-in-chief
Abbreviation
Korean J Aerosp Environ Med
Vernacular Journal Title
ISSN
1226-4504
EISSN
Year Approved
2007
Current Indexing Status
Currently Indexed
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