# US 11,992,247 B2 · Adapter device and system including an adapter device and a bone anchor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,992,247 B2 - Document ID: US11992247B2 - Status: Granted - Kind: B2 - Application number: 17/553,532 - Filed: 2021-12-16 - Published: 2022-06-23 - Granted: 2024-05-28 - Earliest claimed: 2020-12-17 - Assignees: Biedermann Technologies GmbH & Co. KG - Applicants: Biedermann Technologies GmbH & Co. KG - Inventors: Timo Biedermann; Dimosthenis Dandanopoulos - Web page: https://patentgrep.com/patent/US11992247B2 ## CPC - A61B 17/708: {with tubular extensions coaxially mounted on the bone anchors} - A61B 17/8816: {characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections} - A61B 17/7098: {wherein the implant is permeable or has openings, e.g. fenestrated screw (hollow surgical screws A61B17/864)} - A61B 17/864: {hollow, e.g. with socket or cannulated} - A61B 17/7035: {Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other} - A61B 17/7082: {for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws} - A61B 2017/00486: {Adaptors for coupling parts with incompatible geometries} - A61B 2017/564: {Methods for bone or joint treatment} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An adapter device for connecting an instrument to a bone anchor includes an elongate main portion having a longitudinal axis, a first end with a surface that is directly engageable with a head of the bone anchor, an opposite second end, and a channel that extends longitudinally through the main portion, and a holding member having an inner surface forming a seat for the head. The holding member is movable over a majority of the main portion, and is configured to be held at a position where a first portion of the seat is directed towards the second end of the main portion to hold the head in the seat against the first end of the main portion, while the holding member engages another part of the adapter device to keep the first portion of the seat spaced apart axially from the first end of the main portion. ## Claims ### Claim 1 An adapter device for connecting an instrument to a bone anchor that comprises a shank and a head and that defines a channel that extends through the head and at least a portion of the shank, the adapter device comprising: an elongate main portion having a longitudinal axis, a first end with a surface that is directly engageable with the head, an opposite second end, and a channel that extends longitudinally through the main portion; a holding member comprising an inner surface forming a seat for the head; and a supply cannula configured to extend entirely through the channel of the main portion, wherein the supply cannula is movable axially and configured to be held at a plurality of axial positions relative to the main portion; wherein the holding member is movable over a majority of the main portion, and is configured to be held at a position where a first portion of the seat is directed towards the second end of the main portion to hold the head in the seat against the first end of the main portion, while the holding member engages another part of the adapter device to keep the first portion of the seat spaced apart axially from the first end of the main portion. ### Claim 2 (depends on 1) The adapter device of claim 1, wherein the supply cannula comprises a first portion with a first outer diameter and a second portion with a second outer diameter that is smaller than the first outer diameter, such that a step is formed at a transition between the first and second portions. ### Claim 3 (depends on 1) The adapter device of claim 1, wherein the supply cannula comprises a connection portion for connecting a syringe or other supply device to the adapter device. ### Claim 4 (depends on 3) The adapter device of claim 3, wherein the connection portion is directly connectable to the main portion. ### Claim 5 (depends on 1) The adapter device of claim 1, wherein the holding member comprises a sleeve through which the main portion extends, the sleeve having a first end with at least one slot that forms two resilient arms. ### Claim 6 (depends on 1) The adapter device of claim 1, wherein the seat is at a first end of the holding member, and wherein an opposite second end of the holding member is configured to engage the main portion to keep the first portion of the seat spaced apart axially from the first end of the main portion. ### Claim 7 (depends on 1) The adapter device of claim 1, further comprising a locking member configured to act on the holding member to adjust the holding member from a first configuration where the seat is expandable for inserting the head to a second configuration where expansion of the seat is restricted to hold the head in the seat. ### Claim 8 (depends on 7) The adapter device of claim 7, wherein the locking member comprises a sleeve that is movable axially over the holding member. ### Claim 9 (depends on 7) The adapter device of claim 7, further comprising an actuating member connected directly to the main portion that is configured to move the locking member for adjusting the holding member from the first configuration to the second configuration. ### Claim 10 (depends on 1) A system comprising the adapter device of claim 1 and the bone anchor that comprises the shank, the head, and the channel that extends through the head and at least a portion of the shank. ### Claim 11 (depends on 10) The system of claim 10, wherein when the main portion engages the head, the channel of the main portion and the channel of the bone anchor are configured to be in fluid communication with one another. ### Claim 12 (depends on 11) The system of claim 11, wherein the head comprises a free end surface with a recess formed therein for receiving the first end of the main portion in a substantially fluid-tight manner. ### Claim 13 (depends on 11) The system of claim 11, further comprising a supply cannula configured to extend through the channel of the main portion into the channel of the bone anchor. ### Claim 14 (depends on 13) The system of claim 13, wherein the head comprises an abutment for a portion of the supply cannula. ### Claim 15 (depends on 14) The system of claim 14, wherein the supply cannula comprises a first portion with a first outer diameter and a second portion with a second outer diameter that is smaller than the first outer diameter, such that a step is formed at a transition between the first and second portions to abut against the abutment. ### Claim 16 (depends on 10) The system of claim 10, wherein the head comprises an abutment for the first end of the main portion. ### Claim 17 (depends on 10) The system of claim 10, wherein the head comprises a spherical outer surface portion and the seat comprises a spherical inner surface portion. ### Claim 18 An adapter device for connecting an instrument to a bone anchor that comprises a shank and a head and that defines a channel that extends through the head and at least a portion of the shank, the adapter device comprising: an elongate main portion having a longitudinal axis, a first end with a surface that is directly engageable with the head, an opposite second end, and a channel that extends longitudinally through the main portion; a holding member comprising an inner surface forming a seat for the head; and a supply cannula configured to extend entirely through the channel of the main portion, the supply cannula comprising a first portion with a first outer diameter and a second portion with a second outer diameter that is smaller than the first outer diameter, such that a step is formed at a transition between the first and second portions, wherein the step is alignable axially with a free end face of the first end of the main portion; wherein the holding member is configured to be held at a position where a first portion of the seat is directed towards the second end of the main portion to hold the head in the seat against the first end of the main portion, while the holding member engages another part of the adapter device to keep the first portion of the seat spaced apart axially from the first end of the main portion; and wherein the adapter device is adjustable from a first configuration where the seat of the holding member is expandable for inserting the head to a second configuration where expansion of the seat is restricted to hold the head in the seat, while an axial position of the holding member relative to the main portion remains constant. ### Claim 19 (depends on 18) The adapter device of claim 18, further comprising a locking member configured to act on the holding member to adjust the holding member from the first configuration to the second configuration. ### Claim 20 (depends on 19) The adapter device of claim 19, wherein the locking member comprises a sleeve that is movable axially over the holding member. ### Claim 21 (depends on 19) The adapter device of claim 19, wherein the locking member comprises a sleeve that is movable axially relative to the main portion. ### Claim 22 A method of connecting an adapter device to a bone anchor to facilitate connection of an instrument to the bone anchor, the bone anchor comprising a shank and a head and that defines a channel that extends through the head and at least a portion of the shank, the adapter device comprising an elongate main portion having a longitudinal axis, a first end with a surface that is directly engageable with the head, an opposite second end, and a channel that extends longitudinally through the main portion, a holding member comprising an inner surface forming a seat for the head, and a supply cannula insertable into the channel of the main portion, wherein the holding member is configured to be held at a position where a first portion of the seat is directed towards the second end of the main portion to hold the head in the seat against the first end of the main portion, while the holding member engages another part of the adapter device to keep the first portion of the seat spaced apart axially from the first end of the main portion, the method comprising: inserting the head of the bone anchor into the seat of the holding member while the adapter device is at a first configuration where the seat is expandable; adjusting the adapter device to a second configuration where expansion of the seat is restricted to hold the head in the seat, while an axial position of the holding member relative to the main portion remains constants, wherein when at least in the second configuration, the channel of the main portion of the adapter device and the channel of the bone anchor are in fluid communication with one another; and inserting the supply cannula entirely through the channel of the main portion to the bone anchor, wherein the head of the bone anchor comprises an abutment configured to directly engage a portion of the supply cannula to limit axial movement of the supply cannula relative to the bone anchor.