The lateral internal sphincterectomy (L.I.S) is the procedure of choice for chronic
anal fissure heals and relives symptoms that are because the internal anal sphincter is
always under tension in the chronic anal fissure.
More recent studies show that patients with hemorrhoids in the acute phase tend
to have a higher resting anal canal tone, that is the smooth muscle of the anal canal,
tends to be tighter than average.
Constipation and other reasons add to these troubles. Because straining during a
bowel movement increases pressure in the anal canal and pushes hemorrhoids again
the sphincter muscle, which add to increase the tone in the internal sphincter.
Usually, the most of the patients have the internal sphincter always under tension
(96% of the patients).
In our clinic, the lateral internal sphincterectomy (L.I.S.) is the procedure of choice
for the treatment of the hemorrhoids in the acute phase in all the patients.
In the past 25 years we have treated more than 1000 patients with lateral internal
sphincterectomy in acute phase of hemorrhoids, and they never had any incontinence-
infection or recurrence of the hemorrhoids, or any other symptoms.
All the patients were happy and satisfied with the outcome of this method.
The operation time is 3 minutes under general anesthesia, the patient stay only 24
hours in the hospital.
Nimer G. Shaheen
Director of surgical clinic
Athens Medical Center