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Respiratory function in chronic primary fibromyalgia.

M Lurie1, K Caidahl, G Johansson

  • 1Department of Rehabilitation Medicine, Sahlgren's University Hospital, Gothenburg, Sweden.

Scandinavian Journal of Rehabilitation Medicine
|January 1, 1990
PubMed
Summary
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Patients with chronic primary fibromyalgia (CPF) experience reduced respiratory muscle strength. This study found significantly lower maximum inspiratory and expiratory pressures in CPF patients, suggesting potential respiratory muscle dysfunction.

Area of Science:

  • Pulmonary Medicine
  • Rheumatology
  • Physiology

Background:

  • Patients with severe chronic primary fibromyalgia (CPF) often report exertional dyspnea.
  • Understanding the underlying mechanisms of dyspnea in CPF is crucial for patient management.

Purpose of the Study:

  • To investigate respiratory muscle function in women with CPF.
  • To compare respiratory muscle strength between CPF patients and healthy controls.

Main Methods:

  • Respiratory function was assessed in 87 women with CPF and 61 healthy controls.
  • Measurements included Bernstein spirometry, maximum inspiratory pressure (MIP), and maximum expiratory pressure (MEP).
  • Patients also underwent bicycle exercise testing to assess dyspnea.

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Main Results:

  • CPF patients exhibited significantly lower MIP (3.6 +/- 2.0 kPa) and MEP (3.1 +/- 2.1 kPa) compared to controls (MIP: 8.0 +/- 2.2 kPa, MEP: 8.3 +/- 2.2 kPa).
  • Patients reporting dyspnea during exercise had lower respiratory pressures than those without dyspnea.
  • Spirometric values were normal in both groups, while respiratory pressures were reproducibly low in CPF patients.

Conclusions:

  • Maximum inspiratory and expiratory pressures are significantly reduced in patients with CPF.
  • The findings suggest potential respiratory muscle dysfunction as a contributing factor to exertional dyspnea in CPF.
  • Further research into respiratory muscle function is warranted for CPF patients.