Diabetic diarrhoea: A study on gastrointestinal motility, pH levels and autonomic function

Area of Science:

• Gastroenterology
• Diabetology
• Clinical Physiology

Background:

• Chronic diarrhoea is a frequent diabetes complication, often attributed to autonomic neuropathy based on limited evidence.
• Previous research on gastrointestinal motility and pH in diabetic diarrhoea is scarce.

Purpose of the Study:

• To investigate associations between diabetic diarrhoea and alterations in gastrointestinal motility, pH, and autonomic function using novel diagnostic methods.
• To clarify the pathophysiology of diabetic diarrhoea.

Main Methods:

• Fifty-seven patients with diabetes (46 type 1) were assessed using the gastrointestinal symptom rating scale.
• Wireless motility capsule measured gastrointestinal transit, pH, and contractility.
• Autonomic function tests included heart rate variability, baroreflex sensitivity, and orthostatic hypotension.

Main Results:

• Diabetic diarrhoea cases showed slower gastric emptying and faster colonic transit compared to controls.
• Elevated intraluminal pH in the antrum, caecum, and colon was observed in patients with diarrhoea.
• No significant differences in autonomic function were found between groups, though blood pressure changes correlated with colonic transit.

Conclusions:

• Diabetic diarrhoea is characterized by altered gastrointestinal transit and pH levels, with minimal autonomic dysfunction.
• Gastrointestinal function testing is clinically relevant for managing diabetic diarrhoea.