Assessment of Gastrointestinal Autonomic Dysfunction: Present and Future Perspectives

Area of Science:

• Gastroenterology
• Neurology
• Autonomic Medicine

Background:

• The autonomic nervous system (ANS) regulates gastrointestinal (GI) function.
• Autonomic dysfunction (AD) can arise from conditions like diabetes and Parkinson's disease, leading to GI dysmotility.
• Currently, no standard commercial method directly verifies enteric dysfunction.

Purpose of the Study:

• To review established and emerging methods for assessing GI physiological function in AD.
• To evaluate methods for assessing autonomic neuropathy outside the GI tract.
• To compare the clinical performance, strengths, and limitations of these assessment techniques.

Main Methods:

• Review of existing literature on diagnostic methods for GI autonomic dysfunction.
• Analysis of established techniques (e.g., manometry, imaging) and emerging approaches (e.g., high-resolution manometry, 3D-transit, biopsy analysis, microbiota analysis).
• Evaluation of methods for assessing autonomic neuropathy beyond the gut.

Main Results:

• Established methods for assessing GI function in AD have limitations including lack of standardization, radiation exposure, complex data interpretation, and high costs.
• Emerging techniques like high-resolution colonic manometry, 3D-transit, advanced imaging, gut biopsy analysis, and microbiota analysis show promise for evaluating gastroenteropathy in AD.
• Assessment of autonomic neuropathy outside the gut is also crucial for comprehensive diagnosis.

Conclusions:

• Accurate assessment of segmental enteric physiological function is vital for diagnosing and managing AD-related gastroenteropathy.
• A combination of established and novel methods is needed to overcome current diagnostic limitations.
• Further research and standardization of emerging techniques are required to improve clinical utility.