With reference to the article on anal cushion measurement in incontinence by Thekkinkattil and colleagues, the argument has previously been made by Gibbons and co-workers that sphincteric closure alone is insufficient to maintain continence at rest, and that additional mechanisms of hermetic anal occlusion are provided by the haemorrhoid-bearing anal mucosa and submucosa. They showed a linear relationship between sphincter tension and anal canal diameter in accordance with Laplace's law.
Relation
British Journal of Surgery Vol. 96, Issue 11, p. 1373-1374