[Variations in rectal capacity and compliance after abdominal rectopexy]

Area of Science:

• Gastroenterology
• Colorectal Surgery
• Physiology

Background:

• Rectal prolapse is a condition affecting the rectum, with varying degrees of severity.
• Understanding the pathophysiologic characteristics of rectal prolapse is crucial for effective treatment.
• Rectal compliance, a measure of the rectum's ability to expand, is a key factor in rectal function.

Purpose of the Study:

• To investigate the pathophysiologic characteristics of rectal prolapse by evaluating rectal compliance.
• To compare rectal compliance in patients with complete or incomplete rectal prolapse before and after rectopexy.
• To assess the impact of rectopexy on rectal capacity and compliance.

Main Methods:

• The study included 21 patients with complete rectal prolapse, 10 with internal procidentia, and 17 healthy controls.
• Rectal compliance was measured using distension methods before and after abdominal rectopexy (Wells or modified Ripstein technique).
• Rectal volume and compliance were assessed at various distending pressures (0-50 cm H2O).

Main Results:

• Rectal compliance in patients with complete and incomplete rectal prolapse was not significantly different from healthy controls.
• Rectopexy in complete prolapse cases showed significant changes in rectal capacity at lower distending pressures (10-30 cm H2O) and compliance at very low pressures (0-10 cm H2O).
• Rectopexy did not significantly alter capacity or compliance in patients with internal rectal procidentia.

Conclusions:

• Rectal compliance in rectal prolapse (complete and incomplete) does not differ from that of healthy individuals.
• Rectopexy has a limited, pressure-dependent effect on rectal capacity and compliance, particularly in complete prolapse.
• The findings suggest that altered rectal compliance may not be a primary pathophysiologic factor in rectal prolapse.