The fact that the stricture may be seated in the neck of the sac independent of the internal ring, and also that the Duplicature of the contained bowel may be adherent to the neck or other part of the interior, or that firm bands of false membrane may exist so as to constrict the bowel within the sac, are circumstances which require that this should be opened, and the state of its contained parts examined, prior to the replacement of the bowel in the abdomen.
"Surgical Anatomy"
Joseph Maclise
A Duplicature of the peritoneum covering the small intestine, which occupies the middle or center of the abdominal cavity.
"A Practical Physiology"
Albert F. Blaisdell