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本文对10例正常人(Ⅰ组),13例 COPD 患者(Ⅱ组)和17例呼衰气管插管患者(Ⅲ组)进行了最大口腔吸气压(PImax)和最大经膈压(Pdimax)的测定,三组 Pdimax 依次为11.29±3.02kPa、8.11±2.d6kPa 和6.22±2.35kPa、PImax 依次为8.63±2.80kPa、6.62±2.11kPa 和5.76±2.32kPa。各组 Pdimax 均大于该组的 PImax、Pdimax 测定值以第Ⅲ组最低,Ⅱ组次之,Ⅰ组最高,三组PImax 除Ⅰ组与Ⅱ组有明显差别外,Ⅲ组与Ⅱ组间及Ⅱ组与Ⅰ组间 PImax 的差异尚未达到统计学意义,提示 Pdimax 较 PImax 更早地反应呼吸肌(尤其是膈肌)功能损害,尽管如此,三组 PImax 与Pdimax 均呈直线相关,其相关系数分别为0.78、0.86和0.94,证明 PImax 作为无创伤性呼吸肌力量评价指标,仍有一定实用价值。
In this paper, the maximal oral inspiratory pressure (PImax) and maximal diastolic pressure (Pdimax) were measured in 10 normal subjects (group Ⅰ), 13 patients with COPD (group Ⅱ) and 17 patients with endotracheal intubation (group Ⅲ) The three groups of Pdimax followed by 11.29 ± 3.02kPa, 8.11 ± 2.d6kPa and 6.22 ± 2.35kPa, PImax followed by 8.63 ± 2.80kPa, 6.62 ± 2.11kPa and 5.76 ± 2.32kPa. Pdimax of each group was higher than that of the group, Pdimax was the lowest in group Ⅲ, group Ⅱ was the second, group Ⅰ was the highest, group Ⅲ was significantly different from group Ⅱ except group Ⅰ and group Ⅱ The difference of PImax between group and groupⅠwas not yet reached statistical significance, suggesting that Pdimax responded to functional impairment of respiratory muscle (especially diaphragmatic muscle) earlier than PImax. However, there was a linear correlation between PImax and Pdimax in three groups, and the correlation coefficients were 0.78, 0.86 and 0.94, demonstrating that PImax as a noninvasive respiratory muscle strength evaluation index, there is still some practical value.