Bone Biopsy Needle Method:

1. Circumcision needle biopsy

There is a gap at the top of the needle cutting trocar, which is the spiral side knife of the needle, which is installed on the needle core. After penetrating the bone, pull out the needle core, then install the extender, insert the needle core, and rotate downward clockwise. , after turning in 1 to 1.5 cm, then turn it up in a clockwise direction to pull out the puncture needle. Pull out the needle core, the peripheral probe enters from the end of the trocar, carefully push the specimen onto a clean glass slide, and fix it with 10% formalin for inspection. Bone marrow fluid on glass slides for smear examination.

2, trephine needle biopsy method

After the bone marrow biopsy needle penetrates the bone, the needle core is pulled out, and the trephine trocar is rotated downward in a clockwise direction, that is, the bone marrow tissue is screwed into the trocar. Generally, the trephine needle can be slowly pulled out when it penetrates 1 to 1.5 cm. The bone marrow tissue was removed and fixed with a probe.

Bone marrow biopsy, like bone marrow aspirate, is also a method to understand bone marrow status, but biopsy provides a more detailed and comprehensive understanding of bone marrow status than aspirate. For some diseases, such as myelofibrosis, bone marrow aspiration often fails due to "dry aspiration", whereas bone marrow biopsy is often successful.

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