Originally Posted by suzanne4
Jamshedi needle is the one that is usually used, length is 100 mm for the adult, and 50 mm for a child.
Hope that this helps.

Yes, A bone marrow needle is aprox. that big. I just discovererd that you were asking about a bone marrow spesificly...
I have had that much biopsy myselves, and wanted to tell that it depends where on the body y have to take that biopsy..When I took severeals biopsies in my breast, they used different zises, from a little needle supervised by ultrasound, to the needle zice that was as a bone marrow look a like! The most part of the breast is fat, and they couldnt understand that it was so mutch hurting!!! I also had to take mammographi with that needle in my breast, and fainted severel times, because of hurting, and of course of my tention...Well it wasnt bone marrow, but I will never never tell a patient that biopsy doesnt hurt....