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KMID : 0383819840310040176
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Tuberculosis and Respiratory Diseases
1984 Volume.31 No. 4 p.176 ~ p.182
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Role of Intrapleural Pressure in the Positional Effect on Gas Exchange in Unilateral Pleural Effusion
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한동철/Dong Cheol Han
어수택/안병수/김태준/박춘식/Soo Taek Uh/Byung Soo Ahn/Taek Jun Kim/Choon Sik Park
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Abstract
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The positional effect on gas exchange is diminished in a large unilateral pleural
effusion presumable because of decrease in perfusion and decreased changes in
ventilation-perfusion mismatching.
We measured intrapleural pressure(PIp) and estimated the volume of effusion(PHt) by
measuring height of meniscus on chest P-A in 24 patients with unilateral tuberculous
pleural effusion an4 one patient wits nephrotic syndrome to study the relative role of
PIp and PHt in the positional effect of effusion on gas axchange.
PIp and PHt were Positively correlated(r=0.66, p<0.005). Positional PaO2
differece( PaO2) was inversely correlated to PHt(r=-0.50, p<0.05).
PaO2 was also inversely correlated to PIp but the correlation was not
statistically significant(r=-0.4, p>0.05).
The results of this study suggest that intrapleural pressure may be important but that
other factors may also be responsible for the positional effect on gas exchange in
unilateral effusion.
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