The utility model relates to medicine, in particular for medical instruments and can be used to diagnose the state of the channel of the vertebral artery. The apparatus includes a handle and disposed at an acute angle to the longitudinal axis of the handle with a working portion of the cutting edge. The cutting edge is sharpened from the inside of the working part and is provided with lateral projections and the central-limiting guide, beyond the lateral borders. The device eliminates the damage to the vertebral artery, the artery preserves anatomical relationships and spine, reduces runtime manipulation. The device is easy to use.
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