# US 12,758,233 B2 · Surgical instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,758,233 B2 - Document ID: US12758233B2 - Status: Granted - Kind: B2 - Application number: 18/348,015 - Filed: 2023-07-06 - Published: 2024-01-25 - Granted: 2026-10-13 - Earliest claimed: 2022-07-25 - Assignees: Aesculap AG - Applicants: Aesculap AG - Inventors: Franz-Peter Firmbach; Lilli Stoffels - Web page: https://patentgrep.com/patent/US12758233B2 ## CPC - A61B 17/157: {Cutting tibia} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A surgical instrument for use in a total knee arthroplasty includes a first fastening device and a guide device releasably coupled to the first fastening device and configured for releasable coupling to a second fastening device. The guide device has a sliding guide with at least one guide slot extending longitudinally along a guide track and at least one sliding member which is received in the at least one guide slot so as to be slidingly movable along the guide track. The first fastening device has at least one push-fit receiver, by which the at least one sliding member is introduced into the at least one guide slot forming a releasable push-fit connection with the first fastening device. ## Claims ### Claim 1 A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising: a first fastening device having at least one receiver opening; a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device; and at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device; wherein one of the first fastening device and the guide device is configured for releasable fastening to a femoral reference component, and the other of the first fastening device and the guide device is configured for releasable fastening to a tibial component. ### Claim 2 (depends on 1) The surgical instrument according to claim 1, wherein the at least one sliding member has a sliding portion and a push-fit portion, wherein, when the first fastening device is connected with the guide device, the sliding portion is located in the at least one guide slot and the push-fit portion is releasably received in the at least one receiver opening. ### Claim 3 (depends on 1) The surgical instrument according to claim 1, wherein the at least one sliding member comprises two sliding members that are spaced apart from one another, and the at least one receiver opening comprises two receiver openings, wherein each of the two sliding members is configured to be inserted along the orthogonal direction through a respective one of the two receiver openings and into the at least one guide slot. ### Claim 4 (depends on 1) The surgical instrument according to claim 1, further comprising a carrier element on which the at least one sliding member is fastened. ### Claim 5 (depends on 4) The surgical instrument according to claim 4, wherein the carrier element has a base body and a handle portion protruding from the base body. ### Claim 6 (depends on 5) The surgical instrument according to claim 5, wherein, when the first fastening device is connected with the guide device, the handle portion protrudes from the base body along the orthogonal direction. ### Claim 7 (depends on 1) The surgical instrument according to claim 1, further comprising a fixing device that is switchable between a fixing state for fixing relative movability between the first fastening device and the guide device, and a release state in which relative movability between the first fastening device and the guide device is not fixed. ### Claim 8 (depends on 1) The surgical instrument according to claim 1, wherein the at least one sliding member comprises a pin. ### Claim 9 (depends on 8) The surgical instrument according to claim 8, wherein the pin is cylindrical. ### Claim 10 A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising: a first fastening device having at least one receiver opening; a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device; and at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device, wherein the at least one guide slot comprises a hole row defined by holes extending through the guide device in the orthogonal direction for latching of the at least one sliding member, wherein the holes are spaced apart from one another along the longitudinal direction and establish several latching positions for the at least one sliding member. ### Claim 11 A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising: a first fastening device having at least one receiver opening; a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device; and at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device, wherein a portion of the guide device adjacent to the at least one guide slot and/or the at least one sliding member is spring-elastically deformable against a return force, wherein the at least one sliding member is held with the guide device by means of the return force. ### Claim 12 A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising: a first fastening device having at least one receiver opening; a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device; at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device; and a fixing device that is switchable between a fixing state for fixing relative movability between the first fastening device and the guide device, and a release state in which relative movability between the first fastening device and the guide device is not, wherein the fixing device comprises a tooth row extending parallel to the at least one guide slot, and an engagement device which, in the release state, is adjustably movable relative to the tooth row parallel to the at least one guide slot, wherein the tooth row is fastened to the guide device and the engagement device is mounted on the first fastening device. ### Claim 13 (depends on 12) The surgical instrument according to claim 12, wherein the engagement device is mounted on the first fastening device immovably in at least one direction transversely to longitudinal direction. ### Claim 14 (depends on 12) The surgical instrument according to claim 12, wherein the engagement device comprises a form-fit element which is adjustably movable transversely to the at least one guide slot between an engagement position and a release position for switching between the fixing state and the release state, wherein the form-fit element engages in the tooth row in the engagement position, and the form-fit element disengages the tooth row in the release position. ### Claim 15 (depends on 14) The surgical instrument according to claim 14, wherein the engagement device comprises a biasing member which biases the form-fit element into the engagement position. ### Claim 16 (depends on 12) The surgical instrument according to claim 12, wherein the engagement device comprises a gearwheel which is mounted so as to be blockable and rotationally movable, and which meshes in the tooth row and blocks in the fixing state and is rotationally movable in the release state. ### Claim 17 (depends on 12) The surgical instrument according to claim 12, wherein the engagement device comprises an actuating element by which the engagement device is actuatable for switching between the release state and the fixing state. ### Claim 18 (depends on 17) The surgical instrument according to claim 17, wherein the engagement device is manually actuatable by the actuating element for switching between the release state and the fixing state. ### Claim 19 A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising: a first fastening device having at least one receiver opening; a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device; and at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device, wherein the at least one guide slot extends in arcuate form within the sagittal guide plane. ### Claim 20 (depends on 19) The surgical instrument according to claim 19, wherein one of the first fastening device and the guide device is configured for releasable fastening to a femoral reference component, and the other of the first fastening device and the guide device is configured for releasable fastening to a tibial component.