15. Lateral internal sphincterotomy.
Open technique : Involves making an incision across the
intersphincteric groove, separating the internal sphincter
from the anal mucosa by blunt dissection,
and dividing the internal sphincter using scissors.
Closed technique :Involves making a small incision at the
intersphincteric groove, inserting a scalpel with the blade
parallel to the internal sphincter and advancing it along the
intersphincteric groove, and then rotating the scalpel
towards the internal sphincter and dividing it.
16. In both techniques the lower one third to one half of the
internal sphincter is divided, to lower the resting
pressure without destroying the effect of the sphincte
Lateral internal sphincterotomy.
17. Reference
1. Bailey & Love's Short Practice of Surgery 27th E
2. Clinical Surgery 3rd E by Michael M Henry & JEREMY N.THOMPSON
3. https://en.wikipedia.org/wiki/Haemorrhoids
4. https://en.wikipedia.org/wiki/analfissure
