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Mechanical vibration and conventional chest physiotherapy in outpatients with stable chronic obstructive lung disease
Mohsenifar Z, Rosenberg N, Goldberg HS, Koerner SK
Chest 1985 Apr;87(4):483-485
clinical trial
5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; 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*

To assess the effect of conventional chest physiotherapy and mechanical chest vibration on arterial blood gas levels, spirometry, and sputum production, we studied 20 stable outpatients with chronic obstructive lung disease. All patients had severe obstructive ventilatory defects with a mean FEV1/FVC ratio of 30% and all produced moderate amounts of sputum. Patients were randomized and received chest physiotherapy or mechanical vibration for 20 minutes. Arterial blood gas levels and spirometry obtained 20 minutes and 40 minutes after completion of the treatment did not show any significant change compared to the baseline. We conclude that neither chest physiotherapy nor chest mechanical vibration improved gas exchange, flow rates, or clearance of secretions in stable outpatients with severe chronic obstructive lung disease.

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