MEDICAL DOUBLE NEEDLE, BONE PUNCTURING NEEDLE AND BONE MARROW COLLECTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a double needle which can be easily punctured in the bone cortex etc., can set an inner needle and an outer needle aligned easily and can have torque transmission when the inner needle and the outer needle are turned simultaneously.

SOLUTION: The medical double needle 10 comprises a cylindrical outer needle 11 which has a blade edge section 26 at the end and an inner needle 12 which are detachably housed in the outer needle, the rotation diameter of the blade edge section 26 is bigger than that of the main unit when an outer needle 11 is rotated around the long axis, and co-rotation mechanism 20 of the outer needle 11 and the inner needle 12 is provided.

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