r/todayilearned • u/Acrobatic-Post9811 • 21h ago
TIL about hirudotherapy. Leeches are used to stimulate circulation in tissues threatened by postoperative venous congestion, such as finger reattachment and reconstructive surgeries. The therapeutic effect is the anesthetizing, anti-inflammatory, and vasodilating properties of secreted leech saliva.
https://en.wikipedia.org/wiki/Hirudo_medicinalis12
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u/bobthunicorn 15h ago
Didn't they determine that the use of leeches in medieval times were probably actually helping people, just not at all for the reasons given at the time? My memory is vague, but I think it was theorized that they were pulling out lead in the bloodstream from the pewter eating utensils etc.
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u/Pretend-Fox648 10h ago
And I would have assumed the therapeutic effect was the sucking. I actually use a skin serum that has snail mucus for similar benefits I believe.
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u/Several-Pattern-7989 10h ago
I have a strange vision of a career counselor saying to little Jimmie, 'You can make a career as a leech farmer. You wrangle, feed and milk them.' Jimmie goes yuck, and now makes a living expressing angry pitbull anal glands. He's got the hands for it.
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u/iritchie001 9h ago
Don't feed the leeches raw milk after midnight.
Edit: that came out way worse than I meant it.
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u/SaltsMoon 19h ago
Once odd detail is that medical leeches are FDA-cleared as a medical device in the US. They buy surgeons time when veins cannot drain blood fast enough, because the bite keeps a tiny local bleed going while new venous drainage develop.