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COPD and thyroid dysfunctions.

Claudio Terzano1, S Romani, G Paone

  • 1Respiratory Diseases Unit, School of Specialization in Respiratory Diseases, University of Rome "La Sapienza", Policlinico Umberto I, Viale del Policlinico no 155, 00161, Rome, Italy, cterzano@tin.it.

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Thyroid dysfunction in chronic obstructive pulmonary disease (COPD) patients is linked to poorer lung function. Overt hypothyroidism significantly reduces oxygen levels and respiratory muscle strength in COPD patients.

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Area of Science:

  • Pulmonary Medicine
  • Endocrinology

Background:

  • Chronic obstructive pulmonary disease (COPD) involves chronic inflammation affecting both lungs and systemic circulation.
  • Thyroid dysfunctions are frequently observed in chronic diseases like COPD, potentially impacting patient health.
  • COPD patients may have an increased risk for developing hypothyroidism or hyperthyroidism.

Purpose of the Study:

  • To investigate the impact of thyroid dysfunction on the health of patients diagnosed with COPD.
  • To analyze pulmonary function, respiratory pressures, and thyroid status in COPD patients.

Main Methods:

  • Pulmonary function tests, arterial blood gases, maximal inspiratory pressure (MIP), and maximal expiratory pressure (MEP) were assessed.
  • Thyroid function tests were conducted on COPD patients, categorizing them into subclinical hypothyroidism (ScH), overt hypothyroidism, hyperthyroidism, and a control group.
  • Data was collected from patients admitted to the Respiratory Diseases Unit in Rome, Italy, between June 2012 and May 2013.

Main Results:

  • Patients with overt hypothyroidism exhibited significantly lower pO2, MIP, and MEP compared to those with ScH, hyperthyroidism, and controls.
  • A trend towards increased pCO2 levels was observed in hypothyroid COPD patients (p=0.06).

Conclusions:

  • Thyroid dysfunction in COPD patients correlates with impaired respiratory muscle strength (MIP and MEP).
  • A negative correlation was found between hypoxemia and thyroid-stimulating hormone (TSH) levels.
  • Further research is warranted to determine if treating thyroid dysfunction can improve lung function and prognosis in COPD patients.