Instruments and method for ankle replacement surgery
Inventors
Garvey, Brian • Padmanabhan, Deepak
Assignees
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Publication Number
US-11844704-B2
Publication Date
2023-12-19
Expiration Date
Abstract
The present disclosure generally discloses instruments and methods of using those instruments for performing various aspects of ankle replacement surgery. In one embodiment, an alignment assembly for adjusting a position of a guide tool relative to a patient is provided. The alignment assembly includes a proximal housing; a distal housing configured to be connected to the guide tool; and at least one linkage system configured to adjust a relative angle between at least two portions of the alignment assembly. A surgical guide wire is also disclosed. The surgical guide wire includes a distal tip having a tapered or trocar end configured for insertion into a bone; a distal region adjacent to the distal tip; a transition region adjacent to the distal region; and a proximal region adjacent to the transition region.
Core Innovation
The invention relates to ankle replacement surgery instruments that include an alignment assembly for adjusting a position of a guide tool relative to a patient. The alignment assembly includes a proximal housing and a distal housing configured to be connected to the guide tool, and at least one linkage system adjusts a relative angle between the proximal housing and the distal housing.
The linkage system includes a first linkage system and a second linkage system arranged so that the first and second linkage systems provide angular adjustment in two different directions oriented 90 degrees relative to each other. Each linkage system translates rotational input motion to linear output motion, supporting a pivoting relationship between the distal housing and the proximal housing and/or the carriage.
The disclosure also describes a varying-profile surgical guide wire with a tapered or trocar distal tip and a reduced-diameter transition region positioned so as to remain outside bone. The transition region enables a more reliable sever point and reduces interference when instruments are placed over the severed guide wire, in the context of total ankle replacement alignment, including relative angle adjustment in coronal plane and sagittal plane directions.
Claims Coverage
The provided claim content includes one independent claim, describing an alignment assembly with two linkage systems that provide two orthogonal angular adjustment directions and each linkage system translating rotational input motion to linear output motion. Dependent claims refine the arrangement and functional mapping of the adjustments.
Two orthogonal linkage systems translating rotational to linear motion
An alignment assembly comprising a proximal housing, a distal housing connectable to a guide tool, and at least one linkage system that adjusts a relative angle between the proximal housing and the distal housing, wherein the at least one linkage system includes a first linkage system and a second linkage system providing angular adjustment in two different directions oriented 90 degrees relative to each other, and each linkage system translates rotational input motion to linear output motion.
Two-direction angular adjustment mapped to anatomical planes and device elements
First and second linkage systems configured to provide angular adjustment in two different directions corresponding to a coronal plane adjustment for one connection and a sagittal plane adjustment for another connection, including a distal housing, a carriage, and the proximal housing/distal housing relationships as described.
Threaded angular adjustment shafts converting rotational input to linear output and pivoting
First and second angular adjustment shafts each configured to translate rotational motion to linear movement via threaded engagement with corresponding linkage shafts, thereby pivoting the distal and proximal housing and/or the carriage relative to each other in respective directions.
Intermediate housing between proximal and distal housings
An alignment assembly further including an intermediate housing located between the proximal and distal housings.
Single tool engaging both angular adjustment shafts
The alignment assembly wherein a single tool rotationally engages both the first and second angular adjustment shafts.
The claim scope centers on an alignment assembly that adjusts a guide tool position using two 90-degree-oriented linkage systems that convert rotational input motion into linear output motion for angular repositioning, with further refinements for anatomical plane mapping, threaded shaft mechanisms, an intermediate housing, and single-tool engagement.
Stated Advantages
Documented Applications
No documented applications found
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