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Hemorrhoids: an experimental model in monkeys
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PURPOSE: Hemorrhoids are a matter of concern due to a painful outcome. We describe a simple, easy and reliable experimental model to produce hemorrhoids in monkeys. METHODS: 14 monkeys (Cebus apella) were used. After general anesthesia, hemorrhoids were induced by ligation of the inferior hemorrhoidal vein, which is very alike to humans. The vein was located through a perianal incision, dissected and ligated with a 3-0 vicryl. The skin was sutured with a 4-0 catgut thread. Animals were kept in appropriate cages and evaluated daily. RESULTS: Nine days later there were hemorrhoidal piles in the anus in fifty percent (50%) of the animals. Outcome was unremarkable. There was no bleeding and all animals showed no signs of pain or suffering. CONCLUSION: This is an affordable and reliable experimental model to induce hemorrhoids for experimental studies.
Title: Hemorrhoids: an experimental model in monkeys
Description:
PURPOSE: Hemorrhoids are a matter of concern due to a painful outcome.
We describe a simple, easy and reliable experimental model to produce hemorrhoids in monkeys.
METHODS: 14 monkeys (Cebus apella) were used.
After general anesthesia, hemorrhoids were induced by ligation of the inferior hemorrhoidal vein, which is very alike to humans.
The vein was located through a perianal incision, dissected and ligated with a 3-0 vicryl.
The skin was sutured with a 4-0 catgut thread.
Animals were kept in appropriate cages and evaluated daily.
RESULTS: Nine days later there were hemorrhoidal piles in the anus in fifty percent (50%) of the animals.
Outcome was unremarkable.
There was no bleeding and all animals showed no signs of pain or suffering.
CONCLUSION: This is an affordable and reliable experimental model to induce hemorrhoids for experimental studies.
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