Postural Balance Evaluation in Patients with Chronic Obstructive Pulmonary Disease

Area of Science:

• Biomechanics
• Pulmonary Medicine
• Neurology

Background:

• Chronic obstructive pulmonary disease (COPD) patients face a higher risk of falls compared to healthy individuals.
• Falls in COPD patients incur substantial financial burdens related to clinical care.
• Static balance assessment is vital for understanding fall risk in COPD.

Purpose of the Study:

• To compare static balance between COPD patients and healthy controls.
• To investigate the influence of cognitive tasks and vision on balance.
• To utilize linear and non-linear analyses for detailed balance evaluation.

Main Methods:

• Recruited 15 COPD patients and 14 healthy controls.
• Recorded center of pressure (CoP) variations using a force plate under visual feedback and cognitive tasks.
• Analyzed CoP data using linear (e.g., standard deviation, velocity) and non-linear (Lyapunov exponents) methods in anterior-posterior (AP) and medial-lateral (ML) directions.

Main Results:

• Cognitive tasks enhanced CoP variables in both groups.
• Vision impairment significantly affected COPD patients' balance.
• Linear analysis revealed significantly higher ML direction CoP measures in COPD patients versus controls.
• Non-linear analysis demonstrated significant group differences in balance control.

Conclusions:

• Both linear and non-linear analyses are essential for evaluating balance in individuals with breathing impairments.
• COPD-related balance disorders are predominantly observed in the ML direction.
• Postural deformities may contribute to anterior-posterior balance issues in COPD patients.