Bone marrow puncture and marrow extraction

1. Hold the needle with the right hand to Pierce the bone vertically (the needle body and the sternum should be kept at an Angle of 30° ~ 40°). When the needle tip contacts the bone, rotate the needle around the long axis of the needle body until the resistance of the needle disappears and the needle is fixed in the bone, indicating that the puncture is successful.

2. Pull out the needle core and place it in a sterile tray; Connect a dry 10ml or 20ml syringe and extract 0.1-0.2ml bone marrow fluid with appropriate force.)

3. Drop the extracted bone marrow liquid onto the slide, and make 2 bone marrow liquid slides quickly.

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