Surgical Device Anchor Assembly for Tissue-Bone Contact
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Arthroscopic procedures require a method to securely attach soft tissue to bone with a large area of contact, as existing anchor systems with spaced attachment points do not provide sufficient contact area for effective tissue repair.
Innovation Solution
A surgical device with a shaft and handle, featuring an anchor assembly with a cavity and insertion member, and a suture threader with a clip and loop, allowing for multiple attachment points and secure fixation of tissue to bone through a transverse through hole, utilizing a cannulated body with gears and spring mechanism for controlled movement and tensioning of the insertion member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple spaced anchor points are used, then the area of contact between tissue and bone is increased, but the device complexity increases
Solution Approach 1:
The device is divided into an outer member and an inner member that can move independently relative to each other. The outer member engages with the anchor while the inner member engages with the insertion member, allowing separate control of anchor placement and insertion member advancement. This segmentation enables multiple attachment points without requiring a single complex device structure.
Solution Approach 2:
The inner member is slidably received within the outer member, creating a nested structure. The inner member includes a distal portion configured to engage the insertion member, while the outer member includes a distal portion configured to engage the anchor. This nested configuration allows the device to maintain a compact form while providing multiple engagement points for secure tissue-to-bone attachment.
2Manufacturing precision
If a cannulated body with gears and spring mechanism is used for controlled movement, then the control precision of insertion member advancement is improved, but the device complexity increases
Solution Approach 1:
The cannulated body acts as an intermediary mechanism between the user's manual input and the insertion member advancement. It includes a plug with a top portion configured for engagement with the proximal end of the body and a bottom portion coupled to the top portion, with a spring located between first and second portions. This intermediary structure translates rotational or linear input into controlled linear advancement of the insertion member through the anchor.
Solution Approach 2:
The patent replaces direct manual advancement of the insertion member with a mechanical system involving gears and a spring mechanism. The proximal end of the body includes gears that engage with corresponding gears on the plug, providing mechanical advantage and precise control over the insertion member's movement. This mechanical substitution allows for controlled tensioning and advancement without requiring direct manual manipulation of the insertion member itself.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enables broader area contact between tissue and bone, providing secure attachment and facilitating effective tissue repair by allowing multiple anchor points and controlled tensioning, enhancing the stability of the repair.
Implementation Method 1
a spring located between the first and second portions
Data Source
AI summary
The present disclosure relates to a surgical device including a shaft having an outer member and an inner member slidably received within the outer member, a handle coupled to the shaft, and a means for providing movement to the inner member coupled to the inner member. A method of tissue repair is also disclosed.