Assessment of tension between bone anchors

Patent metadata

Field	Value
Publication number	US-2024138949-A1
Application number	US-202418406692-A
Country	US
Kind code	A1
Filing date	Jan 8, 2024
Priority date	Oct 31, 2019
Publication date	May 2, 2024
Grant date	—

Abstract

A system for interconnecting bones includes an implantable member configured to be mechanically coupled to a first bone, configured to be mechanically coupled to a second bone, configured to provide substantially no resistance to compression of the implantable member, configured to support a tensile load within a predetermined range of tensile loads extending from a first load to a second load, configured to have a predetermined elasticity within the range of tensile loads, configured to have a first characteristic at the first load, and configured to have a second characteristic at the second load. The system also includes a means for measuring the first characteristic and the second characteristic. And the system includes a means for calculating a tension between the first bone and the second bone based on the first characteristic and the second characteristic.

First claim

What is claimed is:

1 . A system for interconnecting bones, the system comprising:
an implantable member configured to be mechanically coupled to a first bone, configured to be mechanically coupled to a second bone, configured to provide substantially no resistance to compression of the implantable member, configured to support a tensile load within a predetermined range of tensile loads extending from a first load to a second load, configured to have a predetermined elasticity within the range of tensile loads, configured to have a first characteristic at the first load, and configured to have a second characteristic at the second load; a means for measuring the first characteristic and the second characteristic; and a means for calculating a tension between the first bone and the second bone based on the first characteristic and the second characteristic, wherein the first characteristic is a first opacity, and wherein the second characteristic is a second opacity.

2 . A system for interconnecting bones, the system comprising:
an implantable member configured to be mechanically coupled to a first bone, configured to be mechanically coupled to a second bone, configured to provide substantially no resistance to compression of the implantable member, configured to support a tensile load within a predetermined range of tensile loads extending from a first load to a second load, configured to have a predetermined elasticity within the range of tensile loads, configured to have a first characteristic at the first load, and configured to have a second characteristic at the second load; a means for measuring the first characteristic and the second characteristic; and a means for calculating a tension between the first bone and the second bone based on the first characteristic and the second characteristic, wherein the first characteristic is a first magnetic force-displacement, and wherein the second characteristic is a second magnetic force-displacement.

3 . A method for applying a tension force between a pair of bone anchors, the method comprising the steps of:
attaching a first bone anchor to a first vertebra; attaching a second bone anchor to a second vertebra; attaching a first portion of a flexible member to the first bone anchor; attaching a second portion of the flexible member to the second bone anchor such that there is slack in the middle portion of the flexible member between the first and second portions; reducing the length of the middle portion and removing the slack; measuring the size of a feature of the middle portion after said removing; tensioning the middle portion after said measuring; remeasuring the size of the feature of the middle portion after said tensioning; and comparing the measured size to the remeasured size and determining the state of tension in the middle portion.

Assignees

• Orthopediatrics Corp

Inventors

• Prygoski Matthew
• Detlefsen Richard
• Tozakoglou Evangelos
• Daniluck John V

Classifications

• A61B90/06 Primary

  Measuring instruments not otherwise provided for · CPC title

• A61B17/0401

  Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors (A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811) · CPC title

• A61B17/7053

  with parts attached to bones or to each other by flexible wires, straps, sutures or cables · CPC title

• A61B2017/564

  Methods for bone or joint treatment · CPC title

• A61B17/842 Primary

  Flexible wires, bands or straps (A61B17/72, A61B17/82, A61B17/86 take precedence) · CPC title