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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제47권 제2호
발행연도
2006.1
수록면
184 - 190 (7page)

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The function of inspiratory muscles is crucial for effective cough as well as expiratory muscles in patients with Duchenne muscular dystrophy (DMD). However, there is no report on the correlation between cough and inspiratory muscle strength. To investigate the relationships of voluntary cough capacity, assisted cough techniques, and inspiratory muscle strength as well as expiratory muscle strength in patients with DMD (n= 32). The vital capacity (VC), maximum insufflation capacity (MIC), maximal inspiratory pressure (MIP), and maximal expiratory pressure (MEP) were measured. Unassisted peak cough flow (UPCF) and three different techniques of assisted PCF were evaluated. The mean value of MICs (1918±586 mL) was higher than that of VCs (1474±632mL) (p< 0.001). All three assisted cough methods showed significantly higher value than unassisted method (212±52L/min) (F= 66.13, p<0.001). Combined assisted cough technique (both manual and volume assisted PCF; 286±41L/min) significantly exceeded manual assisted PCF (MPCF; 246±49L/ min) and volume assisted PCF (VPCF; 252±45L/min) (F= 66.13, p<0.001). MIP (34±13cmH2O) correlated significantly with both UPCF and all three assisted PCFs as well as MEP (27±10cmH2O) (p<0.001). Both MEP and MIP, which are the markers of respiratory muscle weakness, should be taken into account in the study of cough effectiveness.

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