Effects of Rehabilitative Intervention for Augmenting Cough Function in Patients with Multiple System Atrophy

Area of Science:

• Neurology
• Pulmonology
• Rehabilitation Medicine

Background:

• Aspiration pneumonia, a leading cause of death in multiple system atrophy (MSA), stems from impaired cough function.
• Effective cough augmentation strategies are crucial for managing MSA patients and preventing fatal respiratory complications.

Purpose of the Study:

• To identify an effective method for improving cough in MSA patients.
• To establish criteria for gastrostomy use based on cough and respiratory dysfunction severity.

Main Methods:

• Eighteen probable MSA patients were divided into air stacking and non-air stacking groups.
• Peak cough flow (PCF) was measured under spontaneous coughing (SpC), SpC with maximum insufflation capacity (MIC), SpC with manually assisted cough (MAC), and SpC with both MIC and MAC.
• Receiver operating characteristic analysis was used to determine %FVC thresholds for identifying high-risk individuals (PCF < 160 L/min).

Main Results:

• Inspiration volume significantly increased with MIC in both groups.
• PCF significantly increased with MIC, particularly in the air stacking group.
• A %FVC below 59% was associated with PCF below 160 L/min, even with MIC application.

Conclusions:

• Maximum insufflation capacity (MIC) effectively enhances peak cough flow (PCF) in MSA patients.
• Gastrostomy timing should be considered based on the severity of cough and respiratory dysfunction, particularly when %FVC falls below 59%.