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De waarde van de "forced expiration technique" (FET) [Dutch]
Verboon JML, Bakker W, Sterk PJ
Nederlands Tijdschrift voor Fysiotherapie [Dutch Journal of Physical Therapy] 1987 Jun;97(3):62-64
clinical trial
2/10 [Eligibility criteria: Yes; 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: No; Point estimates and variability: No. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

The effects of forced expiration technique (FET) with or without postural drainage (PD) was examined in eight adults cystic fibrosis. On four mornings the patients followed a 30-minute physiotherapy session consisting (in a randomised order) of either FET in a sitting position following sleep including postural drainage (FET/PD). The lung function parameters studied did not change during either of the two treatments. Sputum yield measured 22.5 hours before the physiotherapy sessions and over the full 24 hours increased in those patients with more than 30g of sputum per 24 h (p < 0.05) who had PD during their sleep. PD during the treatment sessions did not further increase sputum production. This study indicates that sleeping head-down improves expectoration in patients with copious sputum. PD during FET is not necessary after sleeping in the head-down position.

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