Lung Volume Recruitment Slows Pulmonary Functional Decline and Prolongs Survival in ALS

Area of Science:

• Neurology
• Pulmonology
• Respiratory Medicine

Background:

• Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease impacting respiratory function.
• Long-term effects of lung volume recruitment (LVR) in ALS patients remain under-examined.
• Understanding interventions that may impact ALS progression is crucial.

Purpose of the Study:

• To evaluate the long-term impact of LVR on respiratory function in ALS patients.
• To determine if LVR influences survival rates in individuals with ALS.

Main Methods:

• Retrospective cohort study of hospitalized ALS patients undergoing LVR between 2015-2020.
• Longitudinal assessment of forced vital capacity (%FVC) changes at 3-month intervals pre- and post-LVR.
• Survival analysis incorporating patient data including LVR duration.

Main Results:

• Forced vital capacity (%FVC) decline slowed from ~2% per month to <1% per month after LVR initiation.
• No significant %FVC decrease was observed at 3, 6, 9, or 12 months post-LVR.
• Patients using LVR for ≥6 months demonstrated longer survival, with LVR duration identified as a prognostic factor (HR=0.42).

Conclusions:

• Continued LVR use is associated with a slower rate of respiratory decline in ALS.
• Prolonged LVR (≥6 months) may be linked to improved survival outcomes in ALS patients.
• Further prospective research is recommended to validate these findings.