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The evidence for secretion clearance techniques.

D R Hess1

  • 1Department of Respiratory Care, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114-2696, USA. dhess@partners.org

Respiratory Care
|October 27, 2001
PubMed
Summary
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Evidence supporting airway secretion clearance techniques for respiratory diseases remains limited. This review found a lack of high-level studies demonstrating the effectiveness of methods like chest physiotherapy and airway clearance devices.

Area of Science:

  • Respiratory Medicine
  • Pulmonary Physiology

Background:

  • Increased respiratory secretions are common in acute and chronic respiratory diseases.
  • Existing reviews highlight concerns about the limited evidence supporting secretion clearance techniques.
  • Retained secretions negatively impact respiratory function.

Purpose of the Study:

  • To comprehensively review the evidence supporting various secretion clearance techniques.
  • To identify methodological limitations in existing research on airway clearance.

Main Methods:

  • Conducted a comprehensive MEDLINE search using keywords related to secretion clearance techniques.
  • Included searches for chest physical therapy, airway clearance devices, and related terms.
  • Performed a cross-reference search to identify additional relevant studies.

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Main Results:

  • Identified significant methodological limitations in the literature.
  • Most studies were small, utilized crossover designs, and lacked sham therapy controls.
  • Many studies focused on short-term outcomes like sputum clearance after a single session.

Conclusions:

  • Despite clinical observations, there is a notable lack of high-level evidence to support the efficacy of any specific secretion clearance technique.
  • Further rigorous research is needed to validate these interventions for respiratory conditions.