# US 2014/0194884 A1 · Instruments for total knee arthroplasty > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194884 A1 - Document ID: US20140194884A1 - Status: Published application - Kind: A1 - Application number: 14/206,751 - Filed: 2014-03-12 - Published: 2014-07-10 - Earliest claimed: 2007-03-09 - Assignees: MicroPort Orthopedics Holdings Inc. - Applicants: Microport Orthopedics Holdings Inc. - Inventors: Jeffrey W. Martin; Kevin Wong; Brian R. Harris - Web page: https://patentgrep.com/patent/US20140194884A1 ## CPC - A61B 17/1764: {for the knee} - A61B 17/155: {Cutting femur} - A61B 17/72: Intramedullary devices, e.g. pins or nails - A61B 17/7283: {with special cross-section of the nail} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An instrument assembly for resecting a distal femur for receipt of a knee implant, comprising an intramedullary rod and resection instruments. A valgus portion of the intramedullary rod has series of engagement members positioned to provide a plurality of engagement positions for use in fixing the resection instruments on the valgus portion. The resection instruments are configured to selectively engage and selectively lock on the valgus rod at the engagement positions via the engagement members. The engagement members preferably comprise pairs of substantially vertical indents arranged in parallel along opposing sides of said valgus portions. The resection instruments preferably engages and locks to said engagement members via a sliding rod engagement member. The resection instruments preferably include a distal cut guide having a distal resection slot and a femoral resection block. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 A kit, comprising: a rod having a first portion and a second portion, said first portion including opposed first and second surfaces each having a respective series of engagement members disposed thereon, the engagement members configured to provide a plurality of engagement positions; and a first cutting guide including a body having a first side and a second side that is positioned at an angle with respect to the first side, the first side defining an aperture sized and configured to receive the second portion of the rod therein, the second side defining an engagement track; and a rod engagement member including a pair of spaced apart rail members that are sized and configured to be received within the engagement track defined by the first cutting guide, at least one of the rail members including a rod detent that is configured to be received between a pair of adjacent engagement members of the second portion of the rod when the second portion of the rod is received within the aperture defined by the first cutting guide and when the rod engagement member is disposed within the engagement track defined by the first cutting guide. ### Claim 22 (depends on 21) The kit of claim 21, wherein the rod engagement member defines a slot between the pair of spaced apart rail members. ### Claim 23 (depends on 22) The kit of claim 22,, wherein the pair of spaced apart rail members are coupled together by a cross bar. ### Claim 24 (depends on 21) The kit of claim 21, wherein both spaced apart rail members include a respective rod detent. ### Claim 25 (depends on 21) The kit of claim 21, wherein the first side of the first cutting guide defines a pair of spaced apart pin holes. ### Claim 26 (depends on 25) The kit of claim 25, wherein the first side of the first cutting guide defines a pair of spaced apart resection slots. ### Claim 27 (depends on 21) The kit of claim 21, wherein the first cutting guide includes at least one peg extending from a third side that is disposed opposite the first side such that the second side extends between the first and third sides. ### Claim 28 A method, comprising: inserting a first portion of a rod into a canal formed in a bone; positioning a first cutting guide over a second end of the rod such that the second portion of the rod is received within a slot defined by the first cutting guide, the slot extending from a first side to a second side; and inserting a pair of spaced apart rail members of a rod engagement member into an engagement track defined by a third side of the first cutting guide that extends between the first and second sides, wherein at least one of the rail members includes a rod detent that is received between a pair of adjacent engagement members of the second portion of the rod to secure the first cutting guide to the rod. ### Claim 29 (depends on 28) The surgical method of claim 28, wherein the rod engagement member defines a slot between the pair of spaced apart rail members in which the second portion of the rod is received. ### Claim 30 (depends on 28) The surgical method of claim 28, wherein the pair of spaced apart rail members are inserted into the engagement track until a cross bar that couples together the pair of spaced apart rail members contacts the first cutting guide. ### Claim 31 (depends on 28) The surgical method of claim 28, wherein both spaced apart rail members include a respective rod detent. ### Claim 32 (depends on 28) The surgical method of claim 28, further comprising inserting a first pin into a first hole defined by the first side of the first cutting guide; and inserting a second pin into a second hole defined by the first side of the first cutting guide. ### Claim 33 (depends on 28) The surgical method of claim 28, further comprising inserting a resection tool through a slot defined by the first side of the first cutting guide.