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KMID : 0191120110260091209
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Journal of Korean Medical Science
2011 Volume.26 No. 9 p.1209 ~ p.1213
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Influence of Diaphragmatic Mobility on Hypercapnia in Patients with Chronic Obstructive Pulmonary Disease
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Kang Hyun-Wook
Kim Tae-Ok
Lee Bo-ram
Yu Jin-Yeong
Chi Su-Young
Ban Hee-Jung
Oh In-Jae
Kim Kyu-Sik
Kwon Yong-Soo
Kim Yu-Il
Kim Young-Chul
Lim Sung-Chul
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Abstract
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A reduction in diaphragm mobility has been identified in patients with chronic obstructive pulmonary disease (COPD) and has been associated with a decline in pulmonary function parameters. However, little information exists regarding the potential role of diaphragm mobility on hypercapnia in COPD. A new method of assessing the mobility of the diaphragm, using ultrasound, has recently been validated. The purpose of the present study was to investigate the relationship between diaphragm mobility and pulmonary function parameters, as well as that between arterial blood gas values and diaphragm mobility, in COPD patients. Thirty seven COPD patients were recruited for pulmonary function test, arterial blood gas analysis and diaphragm mobility using ultrasound to measure the craniocaudal displacement of the left branch of the portal vein. There were significant negative correlations between diaphragmatic mobility and PaCO2 (r = -0.373, P = 0.030). Diaphragmatic mobility correlated with airway obstruction (FEV1,r = 0.415, P = 0.011) and with ventilatory capacity (FVC, r = 0.302, P = 0.029; MVV, r = 0.481, P = 0.003). Diaphragmatic mobility also correlated significantly with pulmonary hyperinflation. No relationship was observed between diaphragm mobility and PaO2 (r = -0.028, P = 0.873). These findings support a possibility that the reduction in diaphragm mobility relates to hypercapnia in COPD patients.
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KEYWORD
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Pulmonary Disease, Chronic Obstructive, Diaphragm mobility, Hypercapnia, Ultrasonography
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