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Assessment of the forced expiration technique, postural drainage and directed coughing in chest physiotherapy
Sutton PP, Parker RA, Webber BA, Newman SP, Garland N, Lopez-Vidriero MT, Pavia D, Clarke SW
European Journal of Respiratory Diseases 1983 Jan;64(1):62-68
clinical trial
4/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: No; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

The Forced Expiration Technique (FET), postural drainage (PD) and directed coughing have been evaluated in 10 patients with copious sputum (mean value 63.3 ml/24 h) with an inhaled radioaerosol method over a 30-min treatment period. FET alone and FET+PD (but not directed coughing) cleared more radioaerosol than during the control period (p < 0.01). The wet weight of sputum obtained following FET, FET+PD and directed coughing were all significantly greater than control (p < 0.01). However, sputum obtained by FET+PD was significantly greater than FET alone (p < 0.05). Both FET and particularly FET+PD have been shown to be more effective than directed coughing alone and it is suggested that these manoeuvres should be incorporated into standard chest physiotherapy.
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