# US 2014/0155898 A1 · Puncture instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155898 A1 - Document ID: US20140155898A1 - Status: Published application - Kind: A1 - Application number: 14/174,337 - Filed: 2014-02-06 - Published: 2014-06-05 - Earliest claimed: 2011-08-10 - Assignees: Kota Suda - Inventors: Kota SUDA - Web page: https://patentgrep.com/patent/US20140155898A1 ## CPC - A61B 17/1604: {Chisels; Rongeurs; Punches; Stamps} - A61B 17/1671: {for the spine} - A61B 17/32053: {Punch like cutting instruments, e.g. using a cylindrical or oval knife (A61B17/326 takes precedence; trepans A61B17/1695)} - A61B 2017/320056: {Tunnelers} - A61B 2090/036: {abutting on tissue or skin} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract The present invention is to provide a puncture instrument which has a simple configuration and which, when a pilot hole is formed in a vertebral pedicle, can accurately control the insertion position and direction of the puncture instrument into the vertebral pedicle. The puncture instrument is configured by including a puncture needle 2 for forming the pilot hole, and a reference bar 3 that is provided at the puncture needle to have a predetermined angle with respect to the puncture needle 2 and serves as a reference for guiding the puncture needle 2 to a desired position at a desired angle. With the present invention, the puncture needle 2 is guided by the reference bar 3 to a desired position at a desired angle, and hence the puncture needle can be controlled by a simple configuration as compared with the case where a guiding device is separately provided. ## Claims ### Claim at position 1 1-7. (canceled) ### Claim 8 A puncture instrument for forming, in a vertebral pedicle, a pilot hole for embedding a pedicle screw, the puncture instrument comprising: a puncture needle for forming the pilot hole; and a reference bar that is provided at the puncture needle to have a predetermined angle with respect to the puncture needle and serves as a reference for guiding the puncture needle to a desired position at a desired angle. ### Claim 9 (depends on 8) The puncture instrument according to claim 8, wherein the length from a proximal end to a distal end of the reference bar is set to allow the tip of the puncture needle to be located on a straight line intersecting perpendicularly with the longitudinal axis of the reference bar at the distal end of the reference bar. ### Claim 10 (depends on 8) The puncture instrument according to claim 8, wherein the proximal end section of the reference bar is fixed to the side surface of the puncture needle at a predetermined angle with respect to the puncture needle. ### Claim 11 (depends on 9) The puncture instrument according to claim 9, wherein the proximal end section of the reference bar is fixed to the side surface of the puncture needle at a predetermined angle with respect to the puncture needle. ### Claim 12 (depends on 8) The puncture instrument according to claim 8, further comprising auxiliary means for making the reference bar coincide with a predetermined reference, wherein the auxiliary means includes, at the distal end section and the proximal end section of the reference bar, a first auxiliary bar and a second auxiliary bar respectively that are projected in the direction perpendicular to the reference bar. ### Claim 13 (depends on 9) The puncture instrument according to claim 9, further comprising auxiliary means for making the reference bar coincide with a predetermined reference, wherein the auxiliary means includes, at the distal end section and the proximal end section of the reference bar, a first auxiliary bar and a second auxiliary bar respectively that are projected in the direction perpendicular to the reference bar. ### Claim 14 (depends on 10) The puncture instrument according to claim 10, further comprising auxiliary means for making the reference bar coincide with a predetermined reference, wherein the auxiliary means includes, at the distal end section and the proximal end section of the reference bar, a first auxiliary bar and a second auxiliary bar respectively that are projected in the direction perpendicular to the reference bar. ### Claim 15 (depends on 12) The puncture instrument according to claim 12, wherein the predetermined reference is a line in parallel with the tangent on a posterior surface of a vertebral body. ### Claim 16 (depends on 13) The puncture instrument according to claim 13, wherein the predetermined reference is a line in parallel with the tangent on a posterior surface of a vertebral body. ### Claim 17 (depends on 14) The puncture instrument according to claim 14, wherein the predetermined reference is a line in parallel with the tangent on a posterior surface of a vertebral body. ### Claim 18 (depends on 12) The puncture instrument according to claim 12, wherein the first auxiliary bar and the second auxiliary bar are formed to respectively project from the reference bar in the directions that are perpendicular to the reference bar and opposite to each other. ### Claim 19 (depends on 13) The puncture instrument according to claim 13, wherein the first auxiliary bar and the second auxiliary bar are formed to respectively project from the reference bar in the directions that are perpendicular to the reference bar and opposite to each other. ### Claim 20 (depends on 14) The puncture instrument according to claim 14, wherein the first auxiliary bar and the second auxiliary bar are formed to respectively project from the reference bar in the directions that are perpendicular to the reference bar and opposite to each other. ### Claim 21 (depends on 8) The puncture instrument according to claim 8 used to form a pilot hole in cervical vertebrae from a third cervical vertebra to a seventh cervical vertebra. ### Claim 22 (depends on 9) The puncture instrument according to claim 9 used to form a pilot hole in cervical vertebrae from a third cervical vertebra to a seventh cervical vertebra. ### Claim 23 (depends on 10) The puncture instrument according to claim 10 used to form a pilot hole in cervical vertebrae from a third cervical vertebra to a seventh cervical vertebra.