Dual-Bore Suture Guide Cannula for Precise Anchor Placement
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Solution Overview
Problem
Conventional surgeries for anchoring soft tissue to bone, such as remplissage procedures, lack visual confirmation of anchor placement and often result in improperly positioned knots due to blind suturing, compromising the security of the attachment.
Innovation Solution
A cannula with dual needle guide bores and a tip portion that allows precise positioning of two anchors in bone and enables suturing without tying knots within the body, ensuring the suture lies entirely beneath the muscle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional cannula and blind suturing are used, then the surgical procedure is simple, but the precision of anchor placement and knot positioning is poor
Solution Approach 1:
The cannula is segmented into multiple functional components: a main body portion with first and second needle guide bores, a tip portion with a bore, and a connecting portion. This segmentation allows each component to serve a specific function (guiding needles, receiving anchors, routing suture) while collectively achieving precise anchor placement and secure knot positioning without requiring complex external guidance systems.
Solution Approach 2:
The needle guide bores act as intermediaries that guide the penetrator and anchors into precise positions within the bone. The bores provide a controlled pathway that ensures accurate placement of anchors at predetermined locations, eliminating the need for blind insertion and improving measurement precision while maintaining relatively simple device structure.
2Reliability
If blind knot-tying is performed, then the surgical procedure is quick, but the security of the knot and suture positioning is compromised
Solution Approach 1:
The cannula is pre-configured with needle guide bores and a connecting portion that define the exact pathway for suture placement. The anchors are positioned in advance through these guided bores, and the connecting portion is designed to receive and route the suture between anchors. This preliminary configuration ensures that when the suture is placed, it automatically follows the correct path and the knot forms at the proper location, improving reliability without significant time loss.
3Manufacturing precision
If single needle guide bore is used, then the device is simple, but the precision of dual anchor placement is insufficient
Solution Approach 1:
The needle guide system is segmented into two separate bores (first and second needle guide bores) positioned at specific locations on the cannula. Each bore is dedicated to guiding a specific anchor to its precise target location. This segmentation allows for accurate dual anchor placement while keeping each individual bore simple in structure, avoiding the need for a single complex multi-functional guide.
Solution Approach 2:
The solution moves from a single-point guidance system to a multi-point guidance system by adding spatial dimensionality. The first and second needle guide bores are positioned at different locations and orientations on the cannula, creating a three-dimensional arrangement that enables precise placement of two separate anchors at different bone locations, thereby improving manufacturing precision without excessive complexity.
Data Source
AI summary
A cannula can comprise a main body portion having an outer peripheral surface, a longitudinal axis, a transverse axis that is perpendicular to the longitudinal axis, and opposing first and second ends that are spaced relative to the longitudinal axis. A through-bore can extend through the main body portion. The through bore can comprise a first guide bore, a second guide bore spaced from the first guide bore relative to the transverse axis, and a connecting portion that extends between the first bore and the second bore. A tip portion can extend from the second end of the main body portion relative to the longitudinal axis. The tip portion can comprise a bore therethrough that is coaxial with the first guide bore.