Caspar Cervical Vertebral Body Distractor Caspar Cervical Vertebral Body Distractor is a specialized instrument crafted for use in neurosurgical procedures, specifically those of the spine. A distractor aids in creating separation of joint surfaces without causing rupture of binding ligaments without causing any displacement. This can be used in herniated disc procedures to repair pinched nerves or other procedures of the spine. This instrument is available in either a left or right design.