TY - JOUR
T1 - Whistle mouth pressure as test of expiratory muscle strength
AU - Chetta, A
AU - Harris, M L
AU - Lyall, R A
AU - Rafferty, G F
AU - Polkey, M I
AU - Olivieri, D
AU - Moxham, J
PY - 2001
Y1 - 2001
N2 - Expiratory muscle strength is a determinant of cough function. Mouth pressures during a maximal static expiratory effort (PE,max) are dependent on patient motivation and technique and low values are therefore difficult to interpret. This study hypothesized that a short, sharp and maximal expiration through a narrow aperture, a "whistle", might provide a complementary test of expiratory muscle strength. To obtain a maximal whistle, subjects (27 healthy volunteers and 10 patients with amyotrophic lateral sclerosis) were asked to perform a short, sharp blow as hard as possible, from total lung capacity, through a reversed paediatric inhaler whistle, connected to a flange-type mouthpiece. In both healthy subjects and patients, whistle mouth pressure (Pmo,W) was closely related to the pressure measured in the oesophagus and stomach during the same manoeuvre. In healthy subjects, Pmo,W and PE,max correlated with wide limits of agreement, although Pmo,W values were significantly higher than PE,max (131+/-31 cmH(2)O versus 101+/-27 cmH(2)O, p
AB - Expiratory muscle strength is a determinant of cough function. Mouth pressures during a maximal static expiratory effort (PE,max) are dependent on patient motivation and technique and low values are therefore difficult to interpret. This study hypothesized that a short, sharp and maximal expiration through a narrow aperture, a "whistle", might provide a complementary test of expiratory muscle strength. To obtain a maximal whistle, subjects (27 healthy volunteers and 10 patients with amyotrophic lateral sclerosis) were asked to perform a short, sharp blow as hard as possible, from total lung capacity, through a reversed paediatric inhaler whistle, connected to a flange-type mouthpiece. In both healthy subjects and patients, whistle mouth pressure (Pmo,W) was closely related to the pressure measured in the oesophagus and stomach during the same manoeuvre. In healthy subjects, Pmo,W and PE,max correlated with wide limits of agreement, although Pmo,W values were significantly higher than PE,max (131+/-31 cmH(2)O versus 101+/-27 cmH(2)O, p
UR - http://www.scopus.com/inward/record.url?scp=0035001783&partnerID=8YFLogxK
U2 - 10.1183/09031936.01.17406880
DO - 10.1183/09031936.01.17406880
M3 - Article
SN - 1399-3003
VL - 17
SP - 688
EP - 695
JO - European Respiratory Journal
JF - European Respiratory Journal
IS - 4
ER -