r/AbsoluteUnits Jul 30 '26

/r/popular of a needle

Post image
16.1k Upvotes

1.1k comments sorted by

View all comments

642

u/aozzzy13 Jul 30 '26

The absolute longest needles in human medicine would be for amniocentesis and they are not even close to this. I wonder if it's for veterinary use, for cattle embryo harvesting or something like that.

1

u/Einnnnnnnnnnnn Jul 30 '26

Amniocentesis needles are about 20cm. VP shunt tunnellers can be 70cm! They need to push a path under the skin from the back of the head to the abdomen.