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Yongjun Luo - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of the Visual Analog Score (VAS) to Assess Acute Mountain Sickness (AMS) in a Hypobaric Chamber
2016Co-Authors: Yu Chen, Yongjun LuoAbstract:Objective: The visual analog score (VAS) is widely used in clinical medicine to evaluate the severity of subjective symptoms. There is substantial literature on the application of the VAS in medicine, especially in measuring pain, nausea, fatigue, and sleep quality. Hypobaric Chambers are utilized to test and exercise the anaerobic endurance of athletes. To this end, we evaluated the degree of AMS using the visual analog scale (VAS) in a Hypobaric Chamber in which the equivalent altitude was increased from 300 to 3500 m. Methods: We observed 32 healthy young men in the Hypobaric Chamber (Guizhou, China) and increased the altitude from 300 to 3500 m. During the five hours of testing, we measured the resting blood oxygen saturation (SaO2) and heart rate (HR). Using the VAS, we recorded the subjects ’ ratings of their AMS symptom intensity that occurred throughout the phas
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Evaluation of the Visual Analog Score (VAS) to Assess Acute Mountain Sickness (AMS) in a Hypobaric Chamber
PloS one, 2014Co-Authors: Yu Chen, Yongjun LuoAbstract:Objective The visual analog score (VAS) is widely used in clinical medicine to evaluate the severity of subjective symptoms. There is substantial literature on the application of the VAS in medicine, especially in measuring pain, nausea, fatigue, and sleep quality. Hypobaric Chambers are utilized to test and exercise the anaerobic endurance of athletes. To this end, we evaluated the degree of AMS using the visual analog scale (VAS) in a Hypobaric Chamber in which the equivalent altitude was increased from 300 to 3500 m. Methods We observed 32 healthy young men in the Hypobaric Chamber (Guizhou, China) and increased the altitude from 300 to 3500 m. During the five hours of testing, we measured the resting blood oxygen saturation (SaO2) and heart rate (HR). Using the VAS, we recorded the subjects' ratings of their AMS symptom intensity that occurred throughout the phase of increasing altitude at 300 m, 1500 m, 2000 m, 2500 m, 3000 m, and 3500 m. Results During the phase of increasing altitude in the Hypobaric Chamber, the patients' SaO2 was 96.8±0.8% at 300 m and 87.5±4.1% at 3500 m (P
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evaluation of the visual analog score vas to assess acute mountain sickness ams in a Hypobaric Chamber
PLOS ONE, 2014Co-Authors: Yu Chen, Yongjun LuoAbstract:Objective The visual analog score (VAS) is widely used in clinical medicine to evaluate the severity of subjective symptoms. There is substantial literature on the application of the VAS in medicine, especially in measuring pain, nausea, fatigue, and sleep quality. Hypobaric Chambers are utilized to test and exercise the anaerobic endurance of athletes. To this end, we evaluated the degree of AMS using the visual analog scale (VAS) in a Hypobaric Chamber in which the equivalent altitude was increased from 300 to 3500 m. Methods We observed 32 healthy young men in the Hypobaric Chamber (Guizhou, China) and increased the altitude from 300 to 3500 m. During the five hours of testing, we measured the resting blood oxygen saturation (SaO2) and heart rate (HR). Using the VAS, we recorded the subjects' ratings of their AMS symptom intensity that occurred throughout the phase of increasing altitude at 300 m, 1500 m, 2000 m, 2500 m, 3000 m, and 3500 m. Results During the phase of increasing altitude in the Hypobaric Chamber, the patients' SaO2 was 96.8±0.8% at 300 m and 87.5±4.1% at 3500 m (P<0.05) and their HR was 79.0±8.0 beats/minute at 300 m and 79.3±11.3 beats/minute at 3500 m. The incidence of symptoms significantly increased from 21.9% at an altitude of 1000 m to 65.6% at an altitude of 3500 m (P<0.05). The composite VAS score, which rated the occurrence of four symptoms (headache, dizziness, fatigue, and gastrointestinal discomfort), was significantly correlated with elevation (P<0.01). Conclusion Based on the experimental data, the VAS can be used as an auxiliary diagnostic method of Lake Louise score to evaluate AMS and can show the changing severity of symptoms during the process of increased elevation in a Hypobaric Chamber; it also reflects a significant correlation with altitude.
Yu Chen - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of the Visual Analog Score (VAS) to Assess Acute Mountain Sickness (AMS) in a Hypobaric Chamber
2016Co-Authors: Yu Chen, Yongjun LuoAbstract:Objective: The visual analog score (VAS) is widely used in clinical medicine to evaluate the severity of subjective symptoms. There is substantial literature on the application of the VAS in medicine, especially in measuring pain, nausea, fatigue, and sleep quality. Hypobaric Chambers are utilized to test and exercise the anaerobic endurance of athletes. To this end, we evaluated the degree of AMS using the visual analog scale (VAS) in a Hypobaric Chamber in which the equivalent altitude was increased from 300 to 3500 m. Methods: We observed 32 healthy young men in the Hypobaric Chamber (Guizhou, China) and increased the altitude from 300 to 3500 m. During the five hours of testing, we measured the resting blood oxygen saturation (SaO2) and heart rate (HR). Using the VAS, we recorded the subjects ’ ratings of their AMS symptom intensity that occurred throughout the phas
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Evaluation of the Visual Analog Score (VAS) to Assess Acute Mountain Sickness (AMS) in a Hypobaric Chamber
PloS one, 2014Co-Authors: Yu Chen, Yongjun LuoAbstract:Objective The visual analog score (VAS) is widely used in clinical medicine to evaluate the severity of subjective symptoms. There is substantial literature on the application of the VAS in medicine, especially in measuring pain, nausea, fatigue, and sleep quality. Hypobaric Chambers are utilized to test and exercise the anaerobic endurance of athletes. To this end, we evaluated the degree of AMS using the visual analog scale (VAS) in a Hypobaric Chamber in which the equivalent altitude was increased from 300 to 3500 m. Methods We observed 32 healthy young men in the Hypobaric Chamber (Guizhou, China) and increased the altitude from 300 to 3500 m. During the five hours of testing, we measured the resting blood oxygen saturation (SaO2) and heart rate (HR). Using the VAS, we recorded the subjects' ratings of their AMS symptom intensity that occurred throughout the phase of increasing altitude at 300 m, 1500 m, 2000 m, 2500 m, 3000 m, and 3500 m. Results During the phase of increasing altitude in the Hypobaric Chamber, the patients' SaO2 was 96.8±0.8% at 300 m and 87.5±4.1% at 3500 m (P
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evaluation of the visual analog score vas to assess acute mountain sickness ams in a Hypobaric Chamber
PLOS ONE, 2014Co-Authors: Yu Chen, Yongjun LuoAbstract:Objective The visual analog score (VAS) is widely used in clinical medicine to evaluate the severity of subjective symptoms. There is substantial literature on the application of the VAS in medicine, especially in measuring pain, nausea, fatigue, and sleep quality. Hypobaric Chambers are utilized to test and exercise the anaerobic endurance of athletes. To this end, we evaluated the degree of AMS using the visual analog scale (VAS) in a Hypobaric Chamber in which the equivalent altitude was increased from 300 to 3500 m. Methods We observed 32 healthy young men in the Hypobaric Chamber (Guizhou, China) and increased the altitude from 300 to 3500 m. During the five hours of testing, we measured the resting blood oxygen saturation (SaO2) and heart rate (HR). Using the VAS, we recorded the subjects' ratings of their AMS symptom intensity that occurred throughout the phase of increasing altitude at 300 m, 1500 m, 2000 m, 2500 m, 3000 m, and 3500 m. Results During the phase of increasing altitude in the Hypobaric Chamber, the patients' SaO2 was 96.8±0.8% at 300 m and 87.5±4.1% at 3500 m (P<0.05) and their HR was 79.0±8.0 beats/minute at 300 m and 79.3±11.3 beats/minute at 3500 m. The incidence of symptoms significantly increased from 21.9% at an altitude of 1000 m to 65.6% at an altitude of 3500 m (P<0.05). The composite VAS score, which rated the occurrence of four symptoms (headache, dizziness, fatigue, and gastrointestinal discomfort), was significantly correlated with elevation (P<0.01). Conclusion Based on the experimental data, the VAS can be used as an auxiliary diagnostic method of Lake Louise score to evaluate AMS and can show the changing severity of symptoms during the process of increased elevation in a Hypobaric Chamber; it also reflects a significant correlation with altitude.
Jacques H. Abraini - One of the best experts on this subject based on the ideXlab platform.
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Relationships between mood states and performances in reaction time, psychomotor ability, and mental efficiency during a 31-day gradual decompression in a Hypobaric Chamber from sea level to 8848 m equivalent altitude.
Physiology & behavior, 2000Co-Authors: Benoît Bolmont, Francine Thullier, Jacques H. AbrainiAbstract:Abstract High altitude is characterized by hypoxic environmental conditions that may induce a set of pathological disorders, known as acute mountain sickness. In addition to the physiological symptoms, exposure to high altitude may also produce adverse changes in motor skills, mental efficiency, and mood states, including anxiety. In the present study, we investigated the relationships between mood states, including anxiety, and performance changes in reaction time, psychomotor ability and mental efficiency in eight climbers participating in the ‘Everest-Comex 97’, a 31-day gradual decompression in a Hypobaric Chamber from sea level to 8848 m equivalent altitude. Tests of visual reaction time, manual dexterity, and number ordination were used; anxiety responses and mood states were assessed using the Spielberger State–Trait Anxiety Inventory (STAI) and the ‘Profile of Mood States’ (POMS), respectively. A significant positive correlation was found between the climbers' performance in reaction time and changes in state-type anxiety levels, suggesting that anxiety could lead to an improved reaction time. In addition, significant negative correlations were also found between the climbers' performance in psychomotor ability, mental efficiency, and reaction time, and several POMS factors, including Tension, Hostility, Confusion, and Fatigue. Overall, these data indicate, in agreement with previous studies, that anxiety may favour, or at least not alter, the processes of information of relatively simple tasks, such as reaction time, and further suggest that adverse changes in moods could modulate performance negatively.
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A Study of Mood Changes and Personality during a 31-Day Period of Chronic Hypoxia in a Hypobaric Chamber (Everest-Comex 97)
Psychological reports, 2000Co-Authors: M. Nicolas, F. Thullier-lestienne, Cédric A. Bouquet, Bernard Gardette, Claude Gortan, Jean-paul Richalet, Jacques H. AbrainiAbstract:Su~nmary.-FI~~Ii altitudes of more than 3,000 meters produce physiological disorders and adversc changes in mood states. In the present study, we report analyses of mood states and personahty traits in eight experienced dimbers participating in a 31-day period of confinement in Hypobaric Chamber and gradual decompression from sea level to 8,848 m (Experiment 'Everest-Comex 97'). The subjects were tested at 5,500 rn and 6,500 m on Day 13, 5,000 m and 6,500 m on Day 24, and 8,000 m and 8,848 m altitude on Days 27 and 31. Adverse changes in mood stares, such as Vigor and Fatigue, occurred at 8,000 rn and 8,848 m, which were significantly correlated with cerebral alritude symptomatology. In addition, a significant negative correlation was found between Fatigue and Factor C, which is a personality measure of emotional stability. We suggest that individuals with low emotional stability could be more sensitive to environmental stressors than more emotionally srable subjects who face reality.
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AN ANXIETY, PERSONALITY AND ALTITUDE SYMPTOMATOLOGY STUDY DURING A 31-DAY PERIOD OF HYPOXIA IN A Hypobaric Chamber (EXPERIMENT ‘EVEREST-COMEX 1997’)
Journal of environmental psychology, 1999Co-Authors: M. Nicolas, F. Thullier-lestienne, Cédric A. Bouquet, Bernard Gardette, Claude Gortan, F. Joulia, M. Bonnon, Jean-paul Richalet, P. Therme, Jacques H. AbrainiAbstract:Extreme environmental situations are useful tools for the investigation of the general processes of adaptation. Among such situations, high altitude of more than 3000 m produces a set of pathological disorders that includes both cerebral (cAS) and respiratory (RAS) altitude symptoms. High altitude exposure further induces anxiety responses and behavioural disturbances. The authors report an investigation on anxiety responses, personality traits, and altitude symptoms (AS) in climbers participating in a 31-day period of confinement and gradual decompression in a Hypobaric Chamber equivalent to a climb from sea-level to Mount Everest (8848 m altitude). Personality traits, state-trait anxiety, and AS were assessed, using the Cattell 16 Personality Factor questionnaire (16PF), the Spielberger's State-Trait Anxiety Inventory (STAI), and the Lake Louise concensus questionnaire. Results show significant group effect for state-anxiety and AS; state-anxiety and AS increased as altitude increased. They also show that state-type anxiety shows a similar time-course to cAS, but not RAS. Alternatively, our results demonstrate a significant negative correlation between Factor M of the 16PF questionnaire, which is a personality trait that ranges from praxernia to autia. In contrast, no significant correlation was found between personality traits and AS. This suggests that AS could not be predicted using personality traits and further support that personality traits, such as praxernia (happening sensitivity), could play a major role in the occurrence of state-type anxiety responses in extreme environments. In addition, the general processes of coping and adaptation in individuals participating in extreme environmental experiments are discussed.
Benoît Bolmont - One of the best experts on this subject based on the ideXlab platform.
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Relationships of Personality Traits with Performance in Reaction Time, Psychomotor Ability, and Mental Efficiency during a 31-Day Simulated Climb of Mount Everest in a Hypobaric Chamber
Perceptual and Motor Skills, 2001Co-Authors: Benoît Bolmont, Cédric A. Bouquet, Francine ThullierAbstract:Exposure to chronic hypoxia induces behavioral and mood disturbances and alterations in cognitive functions. We examined the relationships of personality traits, including trait-anxiety, with performance in binary visual reaction time, psychomotor ability, and mental efficiency, using the psychological database of the ‘Everest-Comex 97’ experiment, which consisted in a 31-day simulated climb in a Hypobaric Chamber from sea level to 8,848 m altitude. Analysis yielded a significant positive correlation between the climbers' mean reaction time at hypoxic conditions and preclimb scores on trait-anxiety (as assessed by Spielberger's State-Trait Anxiety Inventory) and further significant negative correlations with both Factor A (reserved-outgoing) and Factor G (expedient-conscientious) of the Cattell Sixteen Personality Factor Questionnaire. In contrast, no significant correlation was found between the climbers' mean psychomotor performance and mental efficiency with personality traits, including anxiety. These...
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Relationships of personality traits with performance in reaction time, psychomotor ability, and mental efficiency during a 31-day simulated climb of Mount Everest in a Hypobaric Chamber'.
Perceptual and motor skills, 2001Co-Authors: Benoît Bolmont, C Bouquet, Francine ThullierAbstract:Exposure to chronic hypoxia induces behavioral and mood disturbances and alterations in cognitive functions. We examined the relationships of personality traits, including trait-anxiety, with performance in binary visual reaction time, psychomotor ability, and mental efficiency, using the psychological database of the 'Everest-Comex 97' experiment, which consisted in a 31-day simulated climb in a Hypobaric Chamber from sea level to 8,848 m altitude. Analysis yielded a significant positive correlation between the climbers' mean reaction time at hypoxic conditions and preclimb scores on trait-anxiety (as assessed by Spielberger's State-Trait Anxiety Inventory) and further significant negative correlations with both Factor A (reserved-outgoing) and Factor G (expedient-conscientious) of the Cattell Sixteen Personality Factor Questionnaire. In contrast, no significant correlation was found between the climbers' mean psychomotor performance and mental efficiency with personality traits, including anxiety. These findings agree with those of previous studies: (i) anxiety could mediate stimulus-response tasks but not more complex tasks requiring strategic processes, (ii) individuals with personality traits such as 'reserved' and 'expedient' could have slight advantages in processing information on stimulus-response tasks. Limitations in study design are also discussed.
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Relationships between mood states and performances in reaction time, psychomotor ability, and mental efficiency during a 31-day gradual decompression in a Hypobaric Chamber from sea level to 8848 m equivalent altitude.
Physiology & behavior, 2000Co-Authors: Benoît Bolmont, Francine Thullier, Jacques H. AbrainiAbstract:Abstract High altitude is characterized by hypoxic environmental conditions that may induce a set of pathological disorders, known as acute mountain sickness. In addition to the physiological symptoms, exposure to high altitude may also produce adverse changes in motor skills, mental efficiency, and mood states, including anxiety. In the present study, we investigated the relationships between mood states, including anxiety, and performance changes in reaction time, psychomotor ability and mental efficiency in eight climbers participating in the ‘Everest-Comex 97’, a 31-day gradual decompression in a Hypobaric Chamber from sea level to 8848 m equivalent altitude. Tests of visual reaction time, manual dexterity, and number ordination were used; anxiety responses and mood states were assessed using the Spielberger State–Trait Anxiety Inventory (STAI) and the ‘Profile of Mood States’ (POMS), respectively. A significant positive correlation was found between the climbers' performance in reaction time and changes in state-type anxiety levels, suggesting that anxiety could lead to an improved reaction time. In addition, significant negative correlations were also found between the climbers' performance in psychomotor ability, mental efficiency, and reaction time, and several POMS factors, including Tension, Hostility, Confusion, and Fatigue. Overall, these data indicate, in agreement with previous studies, that anxiety may favour, or at least not alter, the processes of information of relatively simple tasks, such as reaction time, and further suggest that adverse changes in moods could modulate performance negatively.
Francine Thullier - One of the best experts on this subject based on the ideXlab platform.
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Relationships of Personality Traits with Performance in Reaction Time, Psychomotor Ability, and Mental Efficiency during a 31-Day Simulated Climb of Mount Everest in a Hypobaric Chamber
Perceptual and Motor Skills, 2001Co-Authors: Benoît Bolmont, Cédric A. Bouquet, Francine ThullierAbstract:Exposure to chronic hypoxia induces behavioral and mood disturbances and alterations in cognitive functions. We examined the relationships of personality traits, including trait-anxiety, with performance in binary visual reaction time, psychomotor ability, and mental efficiency, using the psychological database of the ‘Everest-Comex 97’ experiment, which consisted in a 31-day simulated climb in a Hypobaric Chamber from sea level to 8,848 m altitude. Analysis yielded a significant positive correlation between the climbers' mean reaction time at hypoxic conditions and preclimb scores on trait-anxiety (as assessed by Spielberger's State-Trait Anxiety Inventory) and further significant negative correlations with both Factor A (reserved-outgoing) and Factor G (expedient-conscientious) of the Cattell Sixteen Personality Factor Questionnaire. In contrast, no significant correlation was found between the climbers' mean psychomotor performance and mental efficiency with personality traits, including anxiety. These...
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Relationships of personality traits with performance in reaction time, psychomotor ability, and mental efficiency during a 31-day simulated climb of Mount Everest in a Hypobaric Chamber'.
Perceptual and motor skills, 2001Co-Authors: Benoît Bolmont, C Bouquet, Francine ThullierAbstract:Exposure to chronic hypoxia induces behavioral and mood disturbances and alterations in cognitive functions. We examined the relationships of personality traits, including trait-anxiety, with performance in binary visual reaction time, psychomotor ability, and mental efficiency, using the psychological database of the 'Everest-Comex 97' experiment, which consisted in a 31-day simulated climb in a Hypobaric Chamber from sea level to 8,848 m altitude. Analysis yielded a significant positive correlation between the climbers' mean reaction time at hypoxic conditions and preclimb scores on trait-anxiety (as assessed by Spielberger's State-Trait Anxiety Inventory) and further significant negative correlations with both Factor A (reserved-outgoing) and Factor G (expedient-conscientious) of the Cattell Sixteen Personality Factor Questionnaire. In contrast, no significant correlation was found between the climbers' mean psychomotor performance and mental efficiency with personality traits, including anxiety. These findings agree with those of previous studies: (i) anxiety could mediate stimulus-response tasks but not more complex tasks requiring strategic processes, (ii) individuals with personality traits such as 'reserved' and 'expedient' could have slight advantages in processing information on stimulus-response tasks. Limitations in study design are also discussed.
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Relationships between mood states and performances in reaction time, psychomotor ability, and mental efficiency during a 31-day gradual decompression in a Hypobaric Chamber from sea level to 8848 m equivalent altitude.
Physiology & behavior, 2000Co-Authors: Benoît Bolmont, Francine Thullier, Jacques H. AbrainiAbstract:Abstract High altitude is characterized by hypoxic environmental conditions that may induce a set of pathological disorders, known as acute mountain sickness. In addition to the physiological symptoms, exposure to high altitude may also produce adverse changes in motor skills, mental efficiency, and mood states, including anxiety. In the present study, we investigated the relationships between mood states, including anxiety, and performance changes in reaction time, psychomotor ability and mental efficiency in eight climbers participating in the ‘Everest-Comex 97’, a 31-day gradual decompression in a Hypobaric Chamber from sea level to 8848 m equivalent altitude. Tests of visual reaction time, manual dexterity, and number ordination were used; anxiety responses and mood states were assessed using the Spielberger State–Trait Anxiety Inventory (STAI) and the ‘Profile of Mood States’ (POMS), respectively. A significant positive correlation was found between the climbers' performance in reaction time and changes in state-type anxiety levels, suggesting that anxiety could lead to an improved reaction time. In addition, significant negative correlations were also found between the climbers' performance in psychomotor ability, mental efficiency, and reaction time, and several POMS factors, including Tension, Hostility, Confusion, and Fatigue. Overall, these data indicate, in agreement with previous studies, that anxiety may favour, or at least not alter, the processes of information of relatively simple tasks, such as reaction time, and further suggest that adverse changes in moods could modulate performance negatively.