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Spinal Cord Stimulation

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  • Injex Anchoring System

    View all SCS Products

    Features and Specifications

    Summary

    Medtronic understands the need for anchor retention, lead integrity, simple anchor placement, and patient comfort. Through decades of experience in designing leads, our extensive research has shown that immobilizing internal lead wires may damage the lead. That's why the Injex® anchoring system uses a unique compression-fit anchor design that maintains lead integrity by allowing the lead wires to float without undue restraint.

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    Introducing the Injex Anchoring System

    (:57, 3.7 MB)

    This video shows the bumpy and bi-wing Injex anchors and the anchoring system that offers retention without compromise.

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    Implanting the Injex Bi-wing Anchor

    (1:51, 7.3 MB)

    This video demonstrates the technique for implanting the Injex bi-wing anchor.

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    Removing the Injex Bi-wing Anchor

    (1:09, 4.4 MB)

    This video demonstrates the technique for removing the Injex bi-wing anchor.

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    Implanting the Injex Bumpy Anchor

    (1:57, 7.6 MB)

    This video demonstrates the technique for implanting the Injex bumpy anchor.

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    Removing the Injex Bumpy Anchor

    (1:09, 4.4 MB)

    This video demonstrates the technique for removing the Injex bumpy anchor.

    Specifications

    The Injex® anchor is available in 2 models: bumpy and bi-wing. The chart below compares both models and anchors from other manufacturers.

      Medtronic Injex Bumpy Medtronic Injex Bi-wing Boston Scientific Clik™ St. Jude Medical Swift Lock™
    Height 0.157 0.133 0.22 0.182

    Mean stiffness per unit length (lbf/in/in)

    (flexibility)

    0.0039 0.0036

    0.045

    1054% greater stiffness than Injex bumpy

    1150% greater stiffness than Injex bi-wing

    1.04

    26567% greater stiffness than Injex bumpy

    28789% greater stiffness than Injex bi-wing

    Material Silicone; barium sulfate loaded Silicone; barium sulfate loaded Silicone; polyether urethane sleeve (lines inner diameter) Silicone; barium sulfate loaded

    Clik™ is a trademark of Boston Scientific Corporation
    Swift-Lock™ is a trademark of St. Jude Medical, Inc.

    Kit Contents

    The 97791 and 97792 Injex anchoring system accessory kits consist of:

    • 2 anchor dispenser tools preloaded with anchors
    • 1 anchor removal tool

     

    Features

    Although all anchors are designed to secure leads, only Medtronic has published a product performance report and applied the findings – along with experience – to design a lead anchoring system that offers retention without compromise.

    Uniform Compression Instead of Set-screw Restraint

    The Injex® anchoring system eliminates the need to secure the anchor with medical adhesive, screws, or springs.

    • Once deployed from its dispenser, the one-piece silicone anchor compresses automatically and uniformly onto the lead
    • Lead wires float without undue restraint, which may reduce the risk of damage and deformation

    Injex Bumpy

    Automatic and uniform compression

    In comparison, below is an X-ray showing the effect of the set-screw design of the Boston Scientific Click™ Anchor.

    Compare to set-screw anchor design

    A set-screw anchor design may cause concave deformation

    With this set-screw design:

    • Significant and focused pressure is applied against the lead wires, which may cause concave deformation
    • Retention is achieved via a “pinch-point” method that prevents independent movement of lead wires

    Retention and Integrity Without Screws or Twisting

    With its uniform compression-fit design, Injex:

    • Ensures consistent lead retention across the entire length of the anchor without undue stress on the lead
    • Achieves anchor retention and maintains lead integrity without using screws or springs that could fail

    Injex Bi-Wing

    Retention and integrity without screws or twisting

    Below is an X-ray showing a twist design (St. Jude Medical Swift-Lock™ Anchor), where:

    • Focused force applied against lead wires may cause deformation
    • Retention achieved via a twisting action may create kinks in the lead wires

    Compare to twisting action

    Retention achieved via a twisting action may create kinks in the lead wires


    Maximum Holding Force Without Compromising Lead Integrity

    The Injex anchor offers up to 58% greater retention strength than its predecessor, Titan™ anchor.1

    Injex Bi-Wing 29% increase vs Titan, Injex Bumpy 58% increase vs Titan

    Improved retention strength vs Titan anchor


    Simple Anchor Placement

    Injex simplifies anchor placement with its unique dispenser, which provides consistent, reliable positioning.

    • Preloaded tool dispenses the radiopaque anchor onto the lead in a single motion
    • The anchor is embedded easily and securely into the fascia
    • No need for sutures to attach the anchor to the lead
    • A separate tool is included for easy anchor removal without damaging the lead

    View anchor procedure videos


    Patient Comfort

    The Injex anchor is designed for patient comfort with its soft silicone material, lowest profile, and greatest flexibility.

    • Silicone
    • No moving parts
    • Flexible

    Reference
    1. Medtronic data on file

    United States