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Pulmonary function in infectious mononucleosis

E J Morgan, R Altmeyer, R Khakoo

    Chest
    |June 1, 1982
    PubMed
    Summary
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    Infectious mononucleosis (IM) can cause temporary respiratory muscle weakness, impacting breathing. Studies show IM patients experience reduced respiratory pressures that improve over time.

    Area of Science:

    • Pulmonology
    • Infectious Diseases
    • Respiratory Medicine

    Background:

    • Infectious mononucleosis (IM) is a common illness, particularly in student populations.
    • Patients with IM frequently report symptoms such as fatigue and dyspnea (shortness of breath).
    • The impact of IM on respiratory function requires further investigation.

    Purpose of the Study:

    • To investigate the effects of infectious mononucleosis on respiratory function.
    • To assess changes in pulmonary function and respiratory muscle strength during and after IM.
    • To determine if IM is associated with respiratory muscle weakness.

    Main Methods:

    • Seven patients with symptomatic IM underwent spirometry, single-breath diffusing capacity tests, and maximal static respiratory pressure measurements.

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  • Initial tests were conducted during the symptomatic phase of IM.
  • Follow-up tests were performed two weeks later, with respiratory pressure re-evaluation at five months, with each patient serving as their own control.

    • Main Results:

    • Overall pulmonary function, including spirometry and diffusing capacity, was found to be normal in IM patients.
    • Maximal static respiratory pressures were initially low in patients with IM.
    • These reduced respiratory pressures persisted at two weeks but showed significant improvement after five months.

    Conclusions:

    • Infectious mononucleosis is associated with transient respiratory muscle weakness.
    • The observed weakness in respiratory muscles is temporary and resolves over several months.
    • IM should be considered in cases of unexplained respiratory muscle weakness, especially in young adults.