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作者采用残气位（ＲＶ ）和功能残气位（ＦＲＣ）两个肺容积位的最大吸气口腔压（ＭＩＰ）之差，等于ＲＶ位的呼吸系统弹性回位压（Ｐｒｓ ）的原理，测定出ＲＶ 位的Ｐｒｓ。并用此法对２０ 例正常人、９０ 例慢性阻塞性肺疾病（ＣＯＰＤ）及１５例肺间质纤维化（Ｉｎｔｅｒｓｔｉｔｉａｌｌｕｎｇ ｆｉｂｒｏｓｉｓ， ＩＬＦ） 患者进行了ＲＶ 位Ｐｒｓ的测定，同时对ＲＶ 位Ｐｒｓ和残气容积／肺总量（ＲＶ／ＴＬＣ％ ）进行了相关分析。结果：正常人ＲＶ 位的Ｐｒｓ 值为－ ２．８±０．５ ｋＰａ ；肺气肿患者Ｐｒｓ明显降低，且Ｐｒｓ与ＲＶ／ＴＬＣ％ 呈高度负相关（ｒ＝ － ０．８７２）；ＩＬＦ患者Ｐｒｓ则明显增高。结果提示：此方法操作简便、测定结果可靠，适于临床应用。
The authors used the difference between the maximum inspiratory air pressure (MIP) at the two lung volume locations of the residual (RV) and functional residual sites (FRC) to the respiratory elastic pressure (Prs) Prs out of the RV. The Prs of RV in 20 normal subjects, 90 patients with chronic obstructive pulmonary disease (COPD) and 15 patients with interstitial lung fibrosis (ILF) were determined by this method. Volume / total lung volume (RV / TLC%) were analyzed. Results: The Prs value of RV in normal subjects was-2.8 ± 0.5 kPa. Prs in patients with emphysema was significantly decreased, and Prs was highly negatively correlated with RV / TLC% (r = - 0.872). ILF patients Prs was significantly higher. The results suggest that: This method is simple, reliable results, suitable for clinical applications.