US-20260124042-A1 - DRIVE INSTRUMENTS WITH RETENTION MECHANISMS, MEDICAL IMPLANTS, AND RELATED TECHNOLOGIES

US20260124042A1US 20260124042 A1US20260124042 A1US 20260124042A1US-20260124042-A1

Abstract

A system for treating a subject’s spine can include an intervertebral spacer. The intervertebral spacer can be movable between unexpanded and expanded configurations. A locking member can have a threaded distal region configured to threadably engage the intervertebral spacer, and a proximal drive. A drive instrument assembly can include a retention mechanism detachably couplable to the locking member. The retention mechanism can include a socket configured to receive the drive head to rotationally fix the drive instrument to the locking member, and a spring element biased outwardly to releasably hold the drive head in the socket when the spring element extends into the drive head. The drive instrument assembly can be configured to rotate the locking member to move the intervertebral spacer from the unexpanded configuration to the expanded configuration.

Inventors

Clark Hutton
Pako Barba

Assignees

AMPLIFY SURGICAL, INC.

Dates

Publication Date: 20260507
Application Date: 20251230

Claims (18)

1 . An instrument assembly operable to move an implantable spacer between a collapsed configuration and an expanded configuration, the instrument assembly comprising: a drive instrument including a socket having a threaded portion; a connecting member having an elongate body positionable within the socket, wherein the connecting member includes–– a proximal region threadably coupled to the threaded portion of the drive instrument, and a distal region having a multi-pronged cantilever spring; and a locking member including–– a proximal drive head configured to be positioned at least partially within the socket, wherein the proximal drive head includes an end pocket configured to releasably receive at least a portion of the multi-pronged cantilever spring of the connecting member, and a distal threaded portion insertable into the implantable spacer; wherein the locking member is configured to keep the implantable spacer in the expanded configuration.
2 . The instrument assembly of claim 1 , wherein the proximal drive head includes a pocket having an undercut opening, and wherein the pocket and the undercut opening are configured to releasably receive at least part of the multi-pronged cantilever spring of the connecting member.
3 . The instrument assembly of claim 1 , wherein the multi-pronged cantilever spring includes one or more arms that are biased outwardly to releasably couple the locking member to the proximal drive head.
4 . The instrument assembly of claim 1 , wherein the proximal drive head is configured to inwardly deflect the multi-pronged cantilever spring when the multi-pronged cantilever spring is pulled away from the proximal drive head to decouple the locking member from the connecting member.
5 . The instrument assembly of claim 1 , wherein the proximal drive head is configured to inwardly deflect the multi-pronged cantilever spring when the multi-pronged cantilever spring is moved into contact with the end pocket of the proximal drive head to releasably couple the multi-pronged cantilever spring to the proximal drive head.
6 . The instrument assembly of claim 1 , wherein the socket is configured to rotationally fix the locking member relative to the drive instrument such that rotation of the drive instrument produces corresponding rotation of the locking member.
7 . The instrument assembly of claim 1 , wherein the locking member includes an outer flange configured to abut the implantable spacer when the distal threaded portion is threadably received by the implantable spacer, and wherein rotation of the locking member drives the outer flange against the implantable spacer to transition the implantable spacer from the collapsed configuration to the expanded configuration.
8 . The instrument assembly of claim 1 , wherein the multi-pronged cantilever spring is biased to releasably hold the proximal drive head in the socket when the multi-pronged cantilever spring extends into the proximal drive head.
9 . The instrument assembly of claim 1 , wherein the drive instrument includes an outer shaft defining a lumen therethrough, wherein the outer shaft further including the socket configured to releasably receive the proximal drive head; and an inner shaft slidably disposed within the lumen of the outer shaft, wherein the inner shaft includes the multi-pronged cantilever spring.
10 . The instrument assembly of claim 9 , wherein the drive instrument is transitionable between (i) a first configuration, in which the drive instrument is coupled to the locking member, and (i) a second configuration, in which the locking member is released from the drive instrument in response to movement of the inner shaft relative to the outer shaft.
11 . An instrument assembly operable to move an implantable spacer between a first configuration and a second configuration, the instrument assembly comprising: a drive instrument including a socket; a connecting member having an elongate body positionable within the socket, wherein the connecting member includes–– a proximal region configured to be releasably coupled to the socket of the drive instrument, and a distal region having at least one biasing member; and a locking member configured to keep the implantable spacer in second configuration after the implantable spacer is implanted in a subject, the locking member including–– a proximal drive head that includes an end pocket configured to releasably receive at least a portion of the at least one biasing member of the connecting member, and a distal threaded portion insertable into the implantable spacer to couple the locking member to the implantable spacer.
12 . The instrument assembly of claim 11 , wherein the proximal drive head includes a pocket having an undercut opening, and wherein the pocket and the undercut opening are configured to releasably receive at least part of the at least one biasing member.
13 . The instrument assembly of claim 11 , wherein the at least one biasing member includes one or more arms that are biased outwardly to releasably couple the locking member to the proximal drive head.
14 . The instrument assembly of claim 11 , wherein the proximal drive head is configured to inwardly deflect the at least one biasing member when the at least one biasing member is pulled away from the proximal drive head to decouple the locking member from the connecting member.
15 . The instrument assembly of claim 11 , wherein the proximal drive head is configured to inwardly deflect the at least one biasing member when the at least one biasing member is moved into contact with the end pocket of the proximal drive head to releasably couple the at least one biasing member to the proximal drive head.
16 . The instrument assembly of claim 11 , wherein the socket is configured to rotationally fix the locking member relative to the drive instrument such that rotation of the drive instrument produces corresponding rotation of the locking member.
17 . The instrument assembly of claim 11 , wherein the locking member includes an outer flange configured to abut the implantable spacer when the distal threaded portion is threadably received by the implantable spacer, and wherein rotation of the locking member drives the outer flange against the implantable spacer to expand the implantable spacer from the first configuration to the second configuration.
18 . The instrument assembly of claim 11 , wherein the at least one biasing member is biased to releasably hold the proximal drive head in the socket when the at least one biasing member extends into the proximal drive head.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a division of U.S. Patent Application No. 18/464,949, filed on September 11, 2023, which is a continuation of International Application No. PCT/US2022/019706, filed on March 10, 2022, which claims the benefit of U.S. Provisional Patent Application No. 63/159,327, filed on March 10, 2021. The above-identified applications are all incorporated herein by reference in their entireties TECHNICAL FIELD The present technology relates generally to drive instruments with retention mechanisms and, more particularly, to systems, devices, and methods for implanting medical devices. BACKGROUND Implants are often positioned at implantation sites within patients to treat various medical conditions, such as nerve compression and/or damaged or displaced spinal discs and/or vertebral bodies due to trauma, disease, degenerative defects, or wear over an extended period of time. One result of nerve compression and/or displacement or damage to a spinal disc or vertebral body may be chronic back pain. One procedure for treating the spine may involve partial or complete removal of tissue (e.g., an intervertebral disc, tissue contributing to stenosis, etc.) from a target implantation site, and implanting an implantable device along the spine to, for example, replace biological structures or support organs and tissues, reduce nerve compression, help maintain height of the spine, and/or restore stability to the spine. Such implantable device can include spinal fusion devices (e.g., pedicle screw and rods), which can fuse together one or more segments of the spine; interspinous spacers, which can hold apart adjacent vertebrae to help eliminate or reduce nerve compression; and/or intervertebral spacers, which may provide a lordotic correction to the curvature of the spine. However, it may be difficult to position these and other devices at the target implantation site and/or manipulate these devices while they are positioned at the target implantation site. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a spinal surgical system in accordance with embodiments of the present technology. FIG. 2A is a side view of an intervertebral spacer in an unexpanded configuration and positioned in an intervertebral space, in accordance with embodiments of the present technology. FIG. 2B is a side view of the intervertebral spacer of FIG. 2A in an expanded configuration. FIG. 3A is an isometric view of an intervertebral spacer in an unexpanded configuration in accordance with embodiments of the present technology. FIG. 3B is an isometric view of the intervertebral spacer of FIG. 3A in a horizontally expanded configuration in accordance with embodiments of the present technology. FIGS. 3C and 3D are isometric views of the intervertebral spacer of FIG. 3A in a horizontally and vertically expanded configuration in accordance with embodiments of the present technology. FIGS. 4 and 4A are isometric views of a drive instrument assembly and a locking member in accordance with embodiments of the present technology. FIG. 5 is an exploded isometric view of the drive instrument assembly and the locking member of FIG. 4 in accordance with embodiments of the present technology. FIG. 6 is an exploded isometric view of a retention mechanism of the drive instrument assembly and the locking member of FIG. 5 in accordance with embodiments of the present technology. FIG. 7 is a side view of the drive instrument assembly of FIG. 4 and the locking member of FIG. 4 in accordance with embodiments of the present technology. FIG. 8A is a cross-sectional view of the drive instrument assembly and locking member along line 8A-8A of FIG. 7 in accordance with embodiments of the present technology. FIG. 8B is an exploded cross-sectional side view of the drive instrument assembly and locking member of FIG. 8A in accordance with embodiments of the present technology. FIG. 9 is an isometric view of the locking member of FIG. 4 in accordance with embodiments of the present technology. FIG. 10 is a side view of the locking member of FIG. 9. FIG. 11 is a front view of the locking member of FIG. 9. FIG. 12 is an back view of the locking member of FIG. 9. FIG. 13 is an isometric view of the connecting member of FIG. 5 in accordance with embodiments of the present technology. FIG. 14 is a side view of the connecting member of FIG. 13. FIG. 15 is a front view of the connecting member of FIG. 13. FIG. 16A is an isometric view of the drive instrument assembly of FIG. 4 in accordance with embodiments of the present technology. FIG. 16B is a detailed isometric view of a socket of the drive instrument assembly of FIG. 16A in accordance with embodiments of the present technology. FIG. 16C is a detailed isometric view of a connecting region of the drive instrument assembly of FIG. 16A in accordance with embodiments of the present technology. FIG. 17 is a front view of the drive instrument assembly of FIG. 16A in accordance with