# US 12,108,963 B2 · Surgical cutting tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,108,963 B2 - Document ID: US12108963B2 - Status: Granted - Kind: B2 - Application number: 17/186,460 - Filed: 2021-02-26 - Published: 2021-06-17 - Granted: 2024-10-08 - Earliest claimed: 2018-08-31 - Assignees: St. Olavs Hospital, Trondheim University Hospital - Applicants: Norwegian University of Science and Technology - Inventors: Per Magnus Haram - Web page: https://patentgrep.com/patent/US12108963B2 ## CPC - A61B 17/142: {with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades} - A61B 17/32002: {with continuously rotating, oscillating or reciprocating cutting instruments} - A61B 17/147: {with circularly moving saw blades, i.e. non-reciprocating saw blades} - A61B 17/149: {Chain, wire or band saws} - A61B 17/320068: {using mechanical vibrations, e.g. ultrasonic (A61B17/22012 takes precedence; dental tooth drilling devices operated by vibration A61C3/03; removing intra-ocular material using mechanical vibrations A61F9/00745)} - A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)} - A61B 2017/2927: {the angular position of the head being adjustable with respect to the shaft} - A61B 2017/320028: {with reciprocating movements} - A61B 2017/320032: {Details of the rotating or oscillating shaft, e.g. using a flexible shaft} - A61B 2017/32006: {with a cutting strip, band or chain, e.g. like a chainsaw} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A surgical cutting tool for keyhole surgery comprises: a handle 2 at a proximal end of the tool; an elongate member 4 extending from the handle to a distal end of the tool; and a saw 6 at the distal end of the tool, the saw being supported by the elongate member 4. The elongate member 4 has a length allowing for insertion of the saw 6 into the body by a distance of at least 150 mm. The tool is arranged for insertion of the saw 6 into the body during keyhole surgery; and the saw 6 is able to cut bone when pressed against the bone. ## Claims ### Claim 1 A surgical cutting tool for keyhole surgery, the tool comprising: a handle at a proximal end of the tool; an elongate member extending from the handle to a distal end of the tool; and a saw at the distal end of the tool, the saw being supported by the elongate member, wherein the saw includes an oscillating saw blade that is oscillated by energy transferred along the elongate member via a rotating shaft, with oscillating movement of the saw blade being generated via an offset pin protruding from an end of the shaft at a distal end of the elongate member, wherein the offset pin is coupled to the saw blade via a connector with a slot extending perpendicular to the shaft, such that rotation of the shaft rotates the pin to move the pin up and down the slot while the slot oscillates side-to-side, resulting in an oscillating movement of the connector, wherein the tool is arranged for insertion of the saw into the body during keyhole surgery, and wherein the saw is able to cut bone when pressed against the bone. ### Claim 2 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein the elongate member has a length allowing for insertion of a cutter into the body by a distance of at least 250 mm. ### Claim 3 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein a total length of the tool is at least 400 mm. ### Claim 4 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein the elongate member has a rounded shape in cross-section. ### Claim 5 (depends on 4) The surgical cutting tool as claimed in claim 4, wherein the elongate member is an elongate tube or rod. ### Claim 6 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein a largest width of the saw and/or the elongate member is less than 4 cm. ### Claim 7 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein the tool includes a collar located on the elongate member configured for other tools to grip the elongate member. ### Claim 8 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein the tool is adapted for use with a keyhole surgery port. ### Claim 9 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein the saw comprises a cutting mechanism extending across a width of the distal end of the tool. ### Claim 10 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein the saw is mounted to the elongate member with a pivoting joint in order to allow an angle of a cutting mechanism of the saw to vary relative to a longitudinal axis of the elongate member. ### Claim 11 (depends on 10) The surgical cutting tool as claimed in claim 10, wherein the saw includes a blade section joined to the elongate member via the pivoting joint, with the cutting mechanism at a distal end of the blade section, such that movement of the saw via the pivoting joint will result in angulation of the blade section relative to the longitudinal axis of the elongate member with the angulated blade section extending in a direction outward from that axis. ### Claim 12 (depends on 10) The surgical cutting tool as claimed in claim 10, wherein the pivoting joint allows for rotation of 45 degrees or more. ### Claim 13 (depends on 1) The surgical cutting tool as claimed in claim 1, further comprising a twisting mechanism allowing for the saw to be rotated in a twisting motion relative to the handle, with rotation of the saw around a longitudinal axis of the handle. ### Claim 14 (depends on 1) The surgical cutting tool as claimed in claim 1, wherein the saw is driven by a motor in the handle, and wherein kinetic energy is transferred to the saw via the shaft, wherein the shaft is within the elongate member. ### Claim 15 (depends on 1) A robotic surgery device including a cutting tool as claimed claim 1. ### Claim 16 (depends on 1) A method comprising use of the surgical cutting tool of claim 1. ### Claim 17 (depends on 16) The method as claimed in claim 16, further comprising use of the tool for cutting ribs during thoracoscopic surgery.