So how does a bone marrow needle work?

Firstly, the patient should be well explained and cooperate with the patient. Then, a puncture site should be selected, usually the iliac crest, the anterior superior iliac spine or the posterior superior iliac spine. If the bone marrow fluid in these two sites is poor and dry extraction occurs, the sternum can be selected. Then, the puncture site was locally disinfected, covered with towel, and put under local anesthesia with lidocaine. After the end of anesthesia, the bone marrow puncture needle was held vertically to the bone surface, and the needle was rotated into the needle. When the feeling of frustration was felt, the needle core was pulled out, the required bone marrow fluid was extracted with a dry syringe, and the assistant was sent for smear and examination.