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本文报告一种简单的测验肺内气体分布均匀的方法。以衡量肺功能丧失的程度。测验方法是利用测功能残气(氦密闭循环法)过程中连续记录每分钟(自1—7分钟)氦浓度的改变,以氦浓度达到平衡时(指肺内与肺量计内)的时间为准。作者即以此平衡时间名为“氦混合曲线低点”。平衡时间在3分钟以内者为正常,意即吸入气体分布均匀;若超过3分钟者即为异常,其吸入气体分布不均。共计测验496例;男性369例,女性127例;年龄自9—76岁。其中477例为有各种心肺疾病患者,19例为健康者。肺功能测验除氦平衡时间外,尚包括肺活量,最大通气量,第一秒时间肺活量,通气储量,气速指数,残气/肺总量百分比。
This article reports a simple way to test the uniformity of gas distribution in the lungs. To measure the extent of loss of lung function. The test method is to continuously record the change of helium concentration per minute (from 1 to 7 minutes) during the measurement of functional residual gas (helium closed loop method). When the concentration of helium reaches equilibrium (referring to the inside of the lung and the spirometer) Prevail. The author uses this balance of time as the “low helium curve.” Balance the time within 3 minutes were normal, which means inhaled gas evenly distributed; if more than 3 minutes were abnormal, the inhalation of gas unevenly distributed. A total of 496 tests; 369 males and 127 females; age from 9-76 years old. Among them, 477 cases had various cardiopulmonary diseases and 19 cases were healthy. In addition to the helium balance test, the lung function tests include vital capacity, maximum ventilation, vital capacity in the first second, ventilation reserve, air velocity index and percentage of total residual / total lung volume.