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8名不吸烟的老年人,5男3女,65～83岁。肺量测量均在正常限度之内。6名对照者30岁以下。用最大口腔吸气压力(MIP)表示呼吸肌收缩力,用刚刚可以维持原来呼吸气流的口腔吸气压力临界值(常记作MIP的百分比)作为呼吸肌耐力的指标。实验中连续测量MP(口腔压力)与P_(ETCO~2)(呼气末co_2分压)。作者发现,老年人能耐受的MIP是84.9±8.6cmH_2O,青年人是57～140cm
8 non-smoking seniors, 5 males and 3 females, 65 to 83 years old. Spirometry measurements are within normal limits. Six control subjects under the age of 30. Respiratory muscle contractility is expressed in MIP and is used as an indicator of respiratory muscle endurance with the threshold of the oral inspiratory pressure (often referred to as MIP) that maintains the original respiratory flow. In the experiment, MP (oral pressure) and P_ (ETCO ~ 2) were continuously measured (end-expiratory co_2 partial pressure). The authors found that older people tolerated MIP was 84.9 ± 8.6cmH_2O, young people were 57 ~ 140cm