The choice of epidural puncture needle to block the puncture point

Different intervertebral spaces such as cervical spine, thoracic spine, lumbar spine and sacral canal can be selected according to different treatment or anesthesia site requirements of patients. Refer to the following body surface anatomical landmarks: (1) The spinous process with the largest protrusion in the neck is the spinous process of the 7th cervical vertebra. (2) The line connecting the spine of the scapula on both sides is the spinous process of the third thoracic vertebra. (3) The line connecting the scapular angle is the spinous process of the seventh thoracic vertebra. (4) The line connecting the highest points of the iliac crests on both sides is the spinous process of the 4th lumbar vertebra or the space between the 3rd and 4th lumbar spinous processes. The surface landmarks of the sacral canal are the sacral hiatus and the sacral angle

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