Bone marrow puncture site selection

① Anterior superior iliac spine: 1 ~ 2cm above the posterior anterior superior iliac spine is often taken as the puncture point, where the bone surface is relatively flat, easy to fix, convenient and safe operation; (2) Posterior superior iliac spine: located on both sides of the sacral vertebra and the bony protrusion above the buttocks; (3) Manubrium sternum: there is abundant bone marrow here. When the above part of the puncture fails, manubrium sternum puncture can be used, but the bone here is thin, followed by atrium and great vessels, so it is seldom used to prevent the risk of penetration; ④ Lumbar spinous process: located in the source of lumbar spinous process, rarely selected. The anterior lower tibial tuberosity was selected for infants under 5.2 years of age.

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