Which voluvulus type typically occurs in elderly patients?

Sigmoid volvulus is a condition where the sigmoid colon twists upon itself, leading to obstruction. It is particularly common in elderly patients due to factors such as age-related changes in the gastrointestinal tract, decreased colonic motility, and often an increase in the amount of redundant colon.

In elderly individuals, the risk of sigmoid volvulus is heightened due to prolonged constipation and a sedentary lifestyle, both of which contribute to the conditions that favor volvulus formation. Additionally, the anatomical changes in older adults can make them more susceptible to this type of obstruction.

While cecal volvulus can occur, it is less common in the elderly compared to sigmoid volvulus. Ogilvie syndrome, on the other hand, refers to colonic pseudo-obstruction rather than a torsion of the bowel, and intestinal ischemia does not specifically refer to a twisted segment of bowel but rather to blood supply issues that can affect various parts of the intestine. Thus, the nature and the demographic most affected by sigmoid volvulus clearly point to it being the correct choice for this question.