Articular Capsule Retractor for Hip Arthroscopy Access
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Solution Overview
Problem
Arthroscopic procedures face challenges in accessing the joint capsule, particularly in the peripheral compartment during hip arthroscopy, due to the joint capsule inhibiting access.
Innovation Solution
An articular capsule retractor system comprising a flexible construct with a dermal abutting member and an anchor, where the flexible construct includes a strand extending between ends, and the anchor is positioned through the capsule and dermal layer to retract the capsule by pulling the ends, facilitating access and manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the joint capsule is left in its natural position, then the joint structure remains intact and undisturbed, but access to the peripheral compartment during hip arthroscopy is inhibited
Solution Approach 1:
The retractor system acts as an intermediary device between the surgeon and the joint capsule. The flexible construct with dermal abutting member and anchor creates a mechanical mediator that facilitates capsule manipulation without direct manual manipulation, enabling access to the peripheral compartment while maintaining capsule integrity
Solution Approach 2:
The retractor system segments the capsule manipulation function into distinct components: the dermal abutting member interfaces with the skin, the flexible construct provides tension distribution, and the anchor secures to the capsule. This segmentation allows each component to perform its specific function optimally, resolving the access inhibition problem
2Ease of operation
If the joint capsule is manipulated to facilitate access, then surgical access is improved, but the complexity of the procedure and devices increases
Solution Approach 1:
The flexible construct serves multiple functions simultaneously: it transmits tension from the dermal abutting member to the anchor, distributes forces across the capsule, and provides a mechanism for both retraction and manipulation. This multi-functionality reduces the need for multiple separate devices, managing complexity while improving access
3Illumination intensity
If tension is applied to retract the capsule, then access and visibility are enhanced, but the force required may damage the capsule or surrounding tissues
Solution Approach 1:
The system changes the physical parameters of force application by using a flexible construct that distributes tension over a larger area and time period. The flexibility allows for gradual tensioning, converting a high-force sudden application into a lower-force sustained application, thereby enhancing visibility while preserving capsule integrity
Solution Approach 2:
The flexible construct acts as a cushioning element that absorbs and distributes mechanical stresses before they reach the capsule. This prior cushioning prevents concentration of forces that could damage the capsule or surrounding tissues while still achieving the necessary retraction for visibility
Data Source
AI summary
An articular capsule retractor including a flexible construct, a dermal abutting member, and an anchor. The flexible construct includes a strand extending between a first end and a second end. The dermal abutting member is coupled to the flexible construct and is configured to abut a dermal layer. The anchor is coupled to the flexible construct such that the strand extends through a passageway defined by the anchor. Pulling the first end and the second end draws the dermal abutting member and the anchor together.