A lateral internal sphincterotomy is a simple surgery during which the sphincter is cut or stretched. The sphincter is the circular group of muscles surrounding the anus that are responsible for controlling bowel movements. This type of sphincterotomy is a treatment for people who suffer from anal fissures. Anal fissures are breaks or tears in the skin of the anal canal.
NCBI Bookshelf. Surgery may be appropriate for some patients who have had an unsatisfactory response to conservative management. However it is essential that patients receive specialist assessment to check their suitability for surgery. It is vital that those undergoing surgery have realistic expectations and are aware of potential complications. Sphincter Repair - the external anal sphincter can be repaired or simply tightened to try and improve control. The former applies to direct injuries such as those sustained obstetrically or following surgery. An anterior sphincter defect may be repaired some time after the injury.
Rectal prolapse occurs when the rectum the last section of the large intestine falls from its normal position within the pelvic area and sticks out through the anus. The word "prolapse" means a falling down or slipping of a body part from its usual position. Rectal prolapse is common in older adults who have a long-term history of constipation or a weakness in the pelvic floor muscles.