Many people who live in the low altitude areas are often suffered from hypoxia when they entered the high plateau. This problem may seriously influence the physical and mental state and work efficacy for the travelers...Many people who live in the low altitude areas are often suffered from hypoxia when they entered the high plateau. This problem may seriously influence the physical and mental state and work efficacy for the travelers and workers. Oxygen enrichment of a small space air at high altitude is considered as a simple way to provide lowlanders enriched oxygen for sleeping and resting, improving work efficiency, so we developed an oxygen concentration machine based on the technology of oxygen enrichment membrane. This paper tested 8 healthy male lowlanders (age 21.63±1.77 yr) who have never exposed to plateau performed an incremental exercise on cycle ergometer at sea-level in order to be used as sea-level controls. Two days later, the same subjects were taken to Lhasa (3700 m) by air and exposed to the plateau, performed the same exercise as they did at sea-level. The next day, all subjects were asked to enter the experimental tent which was enriched with oxygen (higher than 24%) by the oxygen concentration machine and sleep for 10 hours at night, then exposed to plateau and performed the same exercise twice at different time (2 hours and 10 hours after oxygen enrichment). During the tests, subjects must cycled continuously at 60 rpm beginning with a 3 min exercise intensity of 0 W followed by incremental increases of 25 W every 3 min until 150 W, pulse oxygen saturation (SpO2) and heart rate (HR) were recorded. After sleeping in an oxygen enrichment of tent air, 2 hours later, the subjects’ load capacity had no difference compared with control group, but significant difference than before (higher SpO2 and lower HR), which indicated that oxygen concentration machine is effective in increasing the oxygen concentration of the air for the tent and sleeping in the oxygen enrichment tent for l0 h might be effective in improving exercise performance during high-altitude hypoxia. At the same time, 10 hours later, when work-load exceeded 125 W, the same effects were also found. The results indicated the effects of oxygen enrichment of tent air could last a certain period of time.展开更多
Objective： This study investigated and compared the clinical thinking ability of undergraduate nursing students of different grades, and searched for influencing factors of clinical thinking ability of nursing underg...Objective： This study investigated and compared the clinical thinking ability of undergraduate nursing students of different grades, and searched for influencing factors of clinical thinking ability of nursing undergraduate students. Methods： The convenience sampling method was used to select the Subject of the study. In total, 180 third-year, fourth-year, and fifth-year nursing undergraduate students were enrolled in this study. A self-designed scale of clinical thinking ability was used to collect the data. SPSS17.0 was used to analyze the data. Results： The average scores of clinical thinking ability of undergraduate nursing students were 68.14±9.13. In addition, 71.1% of the students have a higher level of clinical thinking ability, and only 7.2% of the students have the best level. The ANOVA test showed that the fourth-year students had the highest scores（72.96±8.64）, and the third-year students had the lowest scores（62.35±8.09）, which indicated a significant difference in the scores of the three groups（ F= 26. 79, P〈0.05）. Multiple linear regression analysis indicated that the frequency of academic activities and the frequency of department rounds were significantly correlated to clinical thinking ability（P〈0.05）. Conclusion： We must pay attention to the changes and influencing factors of clinical thinking ability of nursing undergraduate students. Thus, traditional teaching methods need to evolve and be revised to host the capacity of clinical practice most effectively and, eventually, promote the development of clinical thinking ability of nursing undergraduate students.展开更多
文摘Many people who live in the low altitude areas are often suffered from hypoxia when they entered the high plateau. This problem may seriously influence the physical and mental state and work efficacy for the travelers and workers. Oxygen enrichment of a small space air at high altitude is considered as a simple way to provide lowlanders enriched oxygen for sleeping and resting, improving work efficiency, so we developed an oxygen concentration machine based on the technology of oxygen enrichment membrane. This paper tested 8 healthy male lowlanders (age 21.63±1.77 yr) who have never exposed to plateau performed an incremental exercise on cycle ergometer at sea-level in order to be used as sea-level controls. Two days later, the same subjects were taken to Lhasa (3700 m) by air and exposed to the plateau, performed the same exercise as they did at sea-level. The next day, all subjects were asked to enter the experimental tent which was enriched with oxygen (higher than 24%) by the oxygen concentration machine and sleep for 10 hours at night, then exposed to plateau and performed the same exercise twice at different time (2 hours and 10 hours after oxygen enrichment). During the tests, subjects must cycled continuously at 60 rpm beginning with a 3 min exercise intensity of 0 W followed by incremental increases of 25 W every 3 min until 150 W, pulse oxygen saturation (SpO2) and heart rate (HR) were recorded. After sleeping in an oxygen enrichment of tent air, 2 hours later, the subjects’ load capacity had no difference compared with control group, but significant difference than before (higher SpO2 and lower HR), which indicated that oxygen concentration machine is effective in increasing the oxygen concentration of the air for the tent and sleeping in the oxygen enrichment tent for l0 h might be effective in improving exercise performance during high-altitude hypoxia. At the same time, 10 hours later, when work-load exceeded 125 W, the same effects were also found. The results indicated the effects of oxygen enrichment of tent air could last a certain period of time.
基金supported by the Project of Department of Science & Technology of Shandong province(2012 YD 18033)
文摘Objective： This study investigated and compared the clinical thinking ability of undergraduate nursing students of different grades, and searched for influencing factors of clinical thinking ability of nursing undergraduate students. Methods： The convenience sampling method was used to select the Subject of the study. In total, 180 third-year, fourth-year, and fifth-year nursing undergraduate students were enrolled in this study. A self-designed scale of clinical thinking ability was used to collect the data. SPSS17.0 was used to analyze the data. Results： The average scores of clinical thinking ability of undergraduate nursing students were 68.14±9.13. In addition, 71.1% of the students have a higher level of clinical thinking ability, and only 7.2% of the students have the best level. The ANOVA test showed that the fourth-year students had the highest scores（72.96±8.64）, and the third-year students had the lowest scores（62.35±8.09）, which indicated a significant difference in the scores of the three groups（ F= 26. 79, P〈0.05）. Multiple linear regression analysis indicated that the frequency of academic activities and the frequency of department rounds were significantly correlated to clinical thinking ability（P〈0.05）. Conclusion： We must pay attention to the changes and influencing factors of clinical thinking ability of nursing undergraduate students. Thus, traditional teaching methods need to evolve and be revised to host the capacity of clinical practice most effectively and, eventually, promote the development of clinical thinking ability of nursing undergraduate students.
