a catheter holder designed to deliver a curable biomaterial to an intervertebral disc space . by securing the catheter to the catheter holder , the depth of insertion of the catheter into the disc space can be accurately controlled . the catheter holder optionally helps with insertion of a optional mold through the annulotomy and into the disc space created by the nuclectomy . the catheter holder helps keep the mold from being drawn too far into the disc space or pushed too far out of the disc space during polymer injection .