Is it painful to draw blood? And bone marrow extraction?

There are two methods for extracting bone marrow hematopoietic stem cells: First, the doctor punctures the donor's iliac bone to collect hematopoietic stem cells in the bone marrow. There is some pain within a day or two after the operation, but it can be completely recovered within a week. The second is to use scientific methods to effectively mobilize hematopoietic stem cells from bone marrow and other parts to release a large amount into the peripheral blood, collect them from the arm vein of the donor, and separate the hematopoietic stem cells by machine, and return the remaining blood to the donor. in vivo.

It doesn't hurt to draw blood, it's similar to what you feel when you have an injection and infusion

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