Leeches Are Back in Modern Surgery
A leech is a blood-sucking worm. Medieval medicine used them wrongly, but modern reconstructive surgery uses them for a real reason.
A leech is a blood-sucking worm, and by extension a person who lives off others. Medicinal leeches never left medicine entirely and are now approved for a specific job: after a finger or ear is reattached, veins often fail before arteries do, and blood pools in the tissue. A leech drains it and its saliva keeps the wound bleeding, buying time for veins to regrow. In Old English *læce* also meant a physician, which is why doctors were once called leeches.
- A blood-sucking worm. *A medicinal leech.*
- A person who exploits others. *A social leech.*
- A physician (archaic). *The king's leech.*
- Hirudin — its anticoagulant. *Hirudin in the saliva.*
- Leechcraft — old English medicine. *Anglo-Saxon leechcraft.*
Word forms
| Form | Word | Example |
|---|---|---|
| Noun | leech | One leech. |
| Plural | leeches | Two leeches. |
| Verb | leech | Leech off someone. |
| Archaic | leech | A physician. |
| Old English | læce | Doctor; leech. |
- Leeches are used after reattachment surgery.Medicine.
- He leeches off his family.Figurative.
- Læce once meant physician.Etymology.
Why leeches work in surgery
- Reattached tissue regrows arteries faster than veins
- Blood arrives but cannot leave, so the tissue congests and dies
- A leech drains the pooled blood
- Hirudin in its saliva keeps the wound bleeding after it detaches
- Approved as a medical device by regulators including the FDA in 2004
Old English *læce*, a physician, and *lyce*, the worm. The two words merged, which is why one form covers both.
Are leeches still used in medicine?
Yes, in reconstructive surgery, to drain congested blood from reattached tissue while veins regrow.
Why were doctors called leeches?
Old English læce meant physician, a separate word that merged with the name of the worm.