Editing Intestinal Segments and Urinary Diversion (section)

=== Small bowel ===

* ≈22 feet in length; however, may vary from 15-30 feet in length
* '''Differences between ileum and jejunum (5):'''
** '''Ileum'''
**# '''More distal'''
**# '''Small diameter'''
**# '''Multiple arterial arcades'''
**# '''Smaller arcade vessels'''
**# '''Thicker mesentery'''
** '''Jejunum'''
**# '''More proximal'''
**# '''Larger diameter'''
**# '''Single arterial arcades'''
**# '''Larger arcade vessels'''
**# '''Thinner mesentery'''
* '''The arcades receive their blood from the superior mesenteric artery'''
* '''Experimentally, up to 15 cm of small bowel can survive laterally to a straight vessel. In general, however, it should be assumed > 8 cm of small bowel will not survive away from a straight vessel'''
* '''In a post pelvic radiation patient, avoid use of 2 segments of the small bowel that may have been exposed to irradiation'''
*# '''Last 2 inches of the terminal ileum'''
*# '''5 feet of small bowel beginning ≈6 feet from the ligament of Treitz''' (also known as the suspensory ligament of the duodenum), a thin muscle connecting the junction between the duodenum, jejunum, and duodenojejunal flexure to connective tissue surrounding the superior mesenteric artery and celiac artery
[[File:Gray 1913 1285.png|alt=Ligament of Treitz|none|thumb|600x600px|Ligament of Treitz. Source: [[commons:File:Gray_1913_1285.png|Wikipedia]]]]