primary studies published RCT Self-administered positive end expiratory pressure (PEEP) using a face mask as an alternative to conventional lung physiotherapy. Year: 1982 Date: 1982 Author: Tonnesen P Source Ugeskr Laeger. 1982 May 24;144(21):1532-6. Study design (if review, criteria of inclusion for studies) Randomised, cross-over trial Participants 14 participants with CF, age range 12 - 29 years, mean age 15.9 years, chronic infection with Pseudomonas aeruginosa. Interventions PEP compared to conventional physiotherapy, 4 days Outcome measures FVC, FEV1, RV, FRC, TLC, PF, bacteriology (Pseudomonas aeruginosa, Staphylococcal aureus, E. coli) Related topics Active cycle of breathing technique in cystic fibrosis Oscillating devices in cystic fibrosis Positive expiratory pressure in cystic fibrosis