The American Society of Colon and Rectal Surgeons ...

Anorectal physiology and colon transit investigations may help identify the underlying etiology and are useful in patients with refractory constipation. Grade of Recom-mendation: Strong recommendation based on low-qual-ity evidence, 1C in those patients who do not respond to basic treatments involving fiber supplementation and osmotic laxatives

  Physiology, Anorectal, Anorectal physiology