Respiratory dysfunction in multiple sclerosis: a prospective analysis of 60 patients

Area of Science:

• Neurology
• Pulmonology
• Rehabilitation Medicine

Background:

• Multiple sclerosis (MS) is a chronic neurological disease affecting the central nervous system.
• Respiratory complications can significantly impact the quality of life and prognosis of MS patients.

Purpose of the Study:

• To investigate the relationship between pulmonary function, respiratory muscle strength, and neurological impairment in individuals with MS.
• To identify correlations between disease severity and respiratory dysfunction.

Main Methods:

• Prospective study of 60 MS patients (mean age 48 years) with varying disability levels (EDSS 6.5 +/- 1.5).
• Assessed pulmonary function (vital capacity, transfer factor), respiratory muscle strength (MEP, MIP), and neurological status (EDSS, FSS).
• Monitored nocturnal transcutaneous oxygen saturation (Stc, O2).

Main Results:

• Patients exhibited marked respiratory muscle dysfunction (MEP 30%, MIP 47% predicted) and minor restrictive lung defects.
• Significant correlations were found between Expanded Disability Status Scale (EDSS) scores and lung volumes (VC).
• Functional Systems Scores (FSS) correlated with VC, MEP, and MIP, indicating a link between specific neurological deficits and respiratory function.
• Nocturnal hypoxemia (Stc, O2 <92%) was observed in 70% of patients.

Conclusions:

• Multiple sclerosis commonly causes lung function abnormalities primarily due to respiratory pump dysfunction.
• Pulmonary and respiratory muscle deficits are associated with the degree of neurological disability in MS.
• These findings highlight the importance of assessing respiratory health in MS management.