| 正常青少年628例用力呼气MTT和MTT_P的分析 |
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| 引用本文： | 黄桂芳,杜金凤,罗炎杰. 正常青少年628例用力呼气MTT和MTT_P的分析[J]. 四川大学学报(医学版), 1990, 0(2) |
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| 作者姓名： | 黄桂芳 杜金凤 罗炎杰 |
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| 作者单位： | 华西医大生理学教研室(黄桂芳),张家口市卫生学校生理学教研室(杜金凤),华西医大内科学教研室(罗炎杰) |
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| 摘 要： | 作者用“直接法”对成都市正常男女青少年628例作了肺量图平均通过时间(MTT)和部分平均通过时间(MTTp)测定与分析。结果表明:MTT和MTTp均随其年龄增长而加大,并随肺内容积衰减而延长;用力肺活量-时间曲线并非单指数函数;比平均通过时间与年龄呈高度负相关,能反映肺弹性回缩压和气道传导率在青少年期间的增长情况。
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| 关 键 词： | 用力呼气肺量图平均通过时间 部分平均通过时间 比平均通过时间 肺弹性回缩压 气道传导率 肺通气功能测定 |
Mean Transit Time and Partial Mean Transit Time of Spirogram in 628 Normal Adolescents |
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| Huang Guifang,Du Jinfeng,Luo Yanjie. Mean Transit Time and Partial Mean Transit Time of Spirogram in 628 Normal Adolescents[J]. Journal of Sichuan University. Medical science edition, 1990, 0(2) |
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| Authors: | Huang Guifang Du Jinfeng Luo Yanjie |
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| Affiliation: | Huang Guifang;Du Jinfeng;Luo Yanjie Department of Physiology Department of Internal Medicine |
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| Abstract: | The mean transit time(MTT) and par-tial mean transit time(MTT_p)were measu-red and analysed by "direct method" in628 cases of normal adolescents in Cheng-du. Tbe results showed that both MTTand MTT_p were increased with age andprolonged with the decay of lung volume.Besides, the FVC-t curve was not singleexponential in nature. The specific meantransit time (SMTT) was introduced bycorrecting MTT with 0.5 FVC and repre-sented tbe MTT when unit volume of gaspassed througy just at tha lung volume.SMTT was highly negatively correlatedwith age.This reflected tbo developmentand growth of the lung recoil and airwayconductance in adolescents. |
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| Keywords: | Mean transit time Partial mean transit time Specific mean transit time Lung recoil pressure Airway conductance |
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