Exercise capacity, lung and respiratory muscle function in substance use disorders.

Area of Science:

• Pulmonology
• Addiction Medicine
• Respiratory Health

Background:

• Substance use disorder (SUD) is linked to cognitive, behavioral, and mental health issues, alongside acute airway inflammation.
• SUD impacts airway bronchial dynamics, necessitating investigation into its pulmonary consequences.

Purpose of the Study:

• To investigate lung function, respiratory muscle strength, and exercise capacity in patients with SUD.
• To compare pulmonary parameters between SUD patients and healthy controls, including smokers and non-smokers.

Main Methods:

• 183 patients with SUD and 119 healthy controls (54 smokers, 65 non-smokers) were enrolled.
• Spirometry, maximal inspiratory/expiratory pressure (MIP/MEP), and the 6-Minute Walk Test (6-MWT) were performed.
• Respiratory symptoms were evaluated using the III National Health and Nutrition Examination Survey.

Main Results:

• Heroin (86.3%), cannabis (9.2%), and spice (5.5%) were the primary substances used by SUD patients.
• Shortness of breath, wheezing, and sputum production were prevalent symptoms in both SUD patients and smokers.
• SUD patients exhibited significantly lower forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1), peak expiratory flow (PEF), and maximal respiratory pressures (MIP/MEP) compared to non-smokers.

Conclusions:

• Substance use demonstrably affects lung function, with shortness of breath, wheezing, and sputum being common symptoms.
• SUD patients experience diminished respiratory muscle strength and reduced exercise capacity compared to non-smokers.