• Zhonghua Jie He He Hu Xi Za Zhi · Apr 1999

    [Effect of pneumothorax on membrane diffusing capacity and pulmonary capillary blood volume].

    • M Zeng, C Xie, and Z Li.
    • Respiratory Department, First Affiliated Hospital, Sun Yat-sen University of Medical Sciences, Guangzhou 510080.
    • Zhonghua Jie He He Hu Xi Za Zhi. 1999 Apr 1;22(4):242-4.

    ObjectiveInvestigating the effect of pulmonary membrane diffusing capacity(Dm) and pulmonary capillary blood volume(Vc) on carbon monoxide diffusing capacity (DLCO) in patients with pneumothorax before and after treatment, and clarifying the mechanism of hypoxemia due to pulmonary reexpansion.MethodsPulmonary function test, DLCO, Dm, Vc and arterial blood gas analysis were determined in 21 cases of pneumothorax before treatment and one week after pulmonary reexpansion.ResultsDLCO, Dm, Vc, partial pressure of arterial oxygen (PaO2), alveolar ventilation volume (VA), percentage of forced expiratory volume in one second to predicted value, and the ratio of dead space ventilation (VD) to tidal volume (VT) [VD/VT] were (64 +/- 4)%, (66 +/- 5)%, (70 +/- 5)%, (83.7 +/- 2.3) mm Hg, (4.4 +/- 0.2) L, (59 +/- 4)%, 0.340 +/- 0.020 respectively before treatment. After pulmonary reexpansion, they respectively were (71 +/- 4)%, (74 +/- 4)%, (80 +/- 6)%, (89.4 +/- 1.5) mm Hg, (5.40 +/- 0.20) L, (79 +/- 4)%, 0.210 +/- 0.010. They were significantly improved after treatment. Except for Dm, they were statistically different. Between Dm, Vc and DLCO, significant positive correlations were found during pneumothorax and one week after pulmonary reexpansion, especially correlation between Dm and DLCO was more apparent. Between Dm and DLCO significant positive correlations (r2 = 0.862, P < 0.0001; r2 = 0.728, P < 0.001) were found in study patients before and after treatment. So were Vc and DLCO (r1 = 0.643, P < 0.01; r2 = 0.52, P < 0.05). The correlation coefficient of Dm was markedly larger than Vc.ConclusionsThe decrease in pulmonary diffusing function is related to Dm and Vc during pneumothorax, while decrease of Dm plays a major role. The hypoxemia is still presented in a period of time after pulmonary reexpansion, which is not related to VA and abnormality of ventilation-perfusion ratio (V/Q). It is chiefly due to unrecovery of Dm.

      Pubmed     Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…

What will the 'Medical Journal of You' look like?

Start your free 21 day trial now.

We guarantee your privacy. Your email address will not be shared.