Knotless Anchor Assembly with Adjustable Compression Member

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current knotless anchors in the market have limitations, such as requiring a secondary anchor and lacking the ability to adjust tissue tension during or after the repair, leading to under or over-tensioning, which can result in repair failure and re-tear.

Innovation Solution

A knotless anchor assembly comprising an anchor and a compression member, where the anchor is driven into bone and the tension member is secured within the anchor body, allowing for adjustable tension through the compression member, eliminating the need for a secondary anchor and enabling independent use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If current knotless anchors are used, then knot-related problems are addressed, but the ability to adjust tissue tension is lost and secondary anchors are required

Engineering Contradiction:

Improveprevention of tissue strangulationVSAvoidability to adjust tissue tension

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The anchor assembly incorporates a dynamic tensioning mechanism that allows the surgeon to adjust and optimize tissue tension after implantation. The compression member can be selectively engaged or disengaged to lock or adjust the tension member, providing post-implantation tension optimization without requiring additional anchors or devices.

Inventive Principle:

Principle #15Dynamics

2Productivity

If knotless anchors are used, then operative time is decreased, but control over tissue tensioning is reduced

Engineering Contradiction:

Improveoperative timeVSAvoidcontrol over tissue tension

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The anchor assembly is designed to be self-contained with all tensioning control features integrated into the single anchor device. The compression member and tension member work together to provide self-adjusting tension control, eliminating the need for separate secondary anchors while maintaining full surgical control over tissue tensioning throughout the procedure.

Inventive Principle:

Principle #25Self-service

3Strength

If tension is applied to secure the repair, then repair strength is improved, but tissue strangulation and necrosis may occur

Engineering Contradiction:

Improverepair strengthVSAvoidtissue strangulation and necrosis

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The dynamic tensioning mechanism allows the surgeon to apply optimal tension for repair strength while maintaining the ability to adjust and reduce tension if signs of tissue strangulation appear. The compression member can be selectively engaged to lock tension or disengaged to release tension, preventing tissue necrosis while maintaining repair integrity.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20230000483A1Knotless anchor assembly and methods thereof

Publication Date: 2023.01.05 DUNAMIS MEDICAL TECH LLC

AI summary

A knotless anchor assembly method and device comprising an anchor and a compression member, wherein the anchor further comprises a pilot tip and anchor body. During procedures to tension the knotless anchor assembly, the anchor is driven into bone or other surface or component, and the tension member is urged into the anchor body recess. The compression member is secured in the anchor body to lock the tension member in place. The knotless anchor assembly gives the surgeon or user the ability to optimize tensioning by having the ability to change tension in the tension member by adjusting the compression member during or after the repair.