Another quick question

Are you having, or have you had a Lateral Internal Sphincterotomy (LIS)? Please share your experiences here, or ask any questions.

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Another quick question

Postby scaredy_butt » 13 Jan 2011, 18:44

What is the difference between open and closed LIS? What did you all have? What are supposed to be the benefits of each?
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Re: Another quick question

Postby StevePain » 14 Jan 2011, 03:42

I don't think there's much difference between the two, maybe it's just the surgeons preference, either of the procedures carry the same risk, I.E. continence issues.
the 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.
the closed technique or subcutaneous 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.
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 sphincter,the closed technique results in a smaller wound, but both techniques appear to be similarly effective.
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