PEEK Braided Suture Knot Security and Strength
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Solution Overview
Problem
Current surgical sutures lack high strength, reliable knot tie-down characteristics, and tissue compatibility, particularly in orthopedic surgery, where materials like ultrahigh molecular weight polyethylene (UHMWPE) provide strength but not acceptable handling qualities, and existing materials are not biologically inert or resistant to hot environments.
Innovation Solution
Development of braided sutures using polyether-ketone (PEEK) fibers, optionally combined with UHMWPE, to enhance mechanical properties, handling, and visibility, with PEEK fibers providing strength, stability, and resistance to hot environments, and incorporating contrasting colored fibers for improved visibility during surgical procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ultrahigh molecular weight polyethylene (UHMWPE) is used to provide high strength, then mechanical strength is improved, but knot tie-down characteristics and handling qualities deteriorate
Solution Approach 1:
The patent combines UHMWPE fibers with PEEK fibers to create a composite suture material. The UHMWPE provides high mechanical strength while the PEEK component improves knot tie-down characteristics and handling qualities, resolving the contradiction between strength and ease of operation.
2Ease of operation
If conventional suture materials are used, then handling characteristics are acceptable, but mechanical strength is insufficient for orthopedic applications
Solution Approach 1:
The patent creates a composite suture using UHMWPE and PEEK fibers where the UHMWPE provides exceptional mechanical strength for orthopedic applications while the PEEK maintains acceptable handling characteristics, reversing the traditional trade-off.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the suture material by incorporating PEEK fibers with specific properties (chemical resistance, wear resistance, thermal stability) to enhance the overall performance while maintaining handling characteristics.
3Stability of the object's composition
If materials resistant to hot environments are used, then stability in hot water/steam is improved, but tissue compatibility and biological inertness deteriorate
Solution Approach 1:
The patent combines materials with complementary properties: UHMWPE provides chemical resistance and stability in hot environments, while PEEK contributes excellent chemical resistance and biological inertness, together creating a suture that is both heat-stable and tissue-compatible.
Solution Approach 2:
The patent utilizes the unique thermal and chemical parameter profile of PEEK (stable up to 480°F, excellent chemical resistance) to create a suture that maintains its properties in autoclave conditions while being biologically inert.
4Reliability
If PEEK fibers are incorporated to improve handling and tissue compatibility, then knot security and tissue reaction are improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates PEEK fibers into the suture construction to improve knot security and tissue compatibility. The composite structure allows the PEEK fibers to enhance reliability while the overall manufacturing process remains scalable using standard textile processing techniques.
Data Source
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AI summary
A high strength abrasion resistant surgical suture material with improved tie down characteristics and tissue compliance with braided fibers formed of ether-ketone variant. The suture features a multifilament jacket formed of braided fibers of ether-ketone variant, optionally braided with fibers of polyester, silk, nylon, ultrahigh molecular weight polyethylene or aramid fibers. The braided jacket surrounds a core formed of twisted fibers of ether-ketone variant or ultrahigh molecular weight polyethylene. The suture has exceptional strength, is ideally suited for most orthopedic procedures, and can be attached to a suture anchor or a curved needle.