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资料和方法 20名老年人(女14人)和20名青年人(女9人),平均年龄分别为83岁和27岁,均不吸烟,未服镇咳药,没有咳嗽和近期的上呼吸道感染,老年组中大多数人没有服用任何药物。为了排除意外的气道阻塞,所有参加者根据美国胸科学会Vi-talograph标准的肺量计记录1秒钟用力呼气量(FEV_1),用力呼气法是从吸气后最大肺活量开始至呼气后所剩残气量为止,连续3次用力呼气的最高值即为最大用力呼气量。老年组5人对肺量计不适应而排除在随后的统计分析以外。根据Enxight等预测老年组的正常值,老年组(n=15)和青年组(n=20)的平均用力呼气量(预测百分数)分别是98
MATERIALS AND METHODS Twenty elderly women (14 women) and 20 young women (9 women) with mean age of 83 and 27 years, respectively, were non-smokers and were not given antitussives, cough and recent upper respiratory tract Most people in the elderly group did not take any medications. To exclude unwanted airway obstruction, all participants recorded a forced expiratory volume of 1 second (FEV 1) according to the Vi-talograph spirometer of the American Thoracic Society. The forced expiratory volume was measured from the maximum expiratory volume after inspiration Residual amount of gas left after the gas pressure, continuous exhalation for 3 times the maximum value is the maximum forced expiratory volume. In the elderly group, 5 were excluded from the subsequent statistical analysis of spirometry. According to the normal values predicted by Enxight et al., The average forced expiratory volume (predicted percentage) in the elderly group (n = 15) and the young group (n = 20) was 98