📊 Evidence-Based Reference
Guidezilla II Guide Extension Catheter Guidezilla II Long Guide Extension Catheter
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Summary: The Guidezilla II is a guide extension catheter used primarily in percutaneous coronary interventions to enhance guide catheter support. Key evidence highlights its use in complex saphenous vein graft interventions and innovative auxiliary support techniques.
FDA Clearance Information
Pathway ?
510(k)
Number ?
K163314 ↗
Decision Date ?
March 23, 2017
Product Code ?
DQY Catheter, Percutaneous
Device Class ?
Class 2
Evidence ?
0 studies
The Guidezilla II guide extension catheter, manufactured by Boston Scientific, was cleared via the FDA 510(k) pathway on March 23, 2017. It is classified as a Class 2 device under product code DQY.
What It Is
The Guidezilla II is a guide extension catheter designed to provide enhanced backup support during percutaneous coronary interventions (PCI). It facilitates deep intubation and coaxial alignment of the guide catheter, improving access to coronary arteries.
FDA-Cleared Indications
- Temporary placement in the coronary vasculature to facilitate the delivery of interventional devices during PCI.
- Provides additional backup support and coaxial alignment for a guiding catheter during coronary interventions.
- Used to assist delivery of devices through tortuous, angulated, calcified or otherwise challenging coronary anatomy.
Clinical Applications
- Supporting delivery of coronary stents during PCI.
- Facilitating delivery of balloons, atherectomy equipment and other coronary interventional devices when guide-catheter support is limited.
- Improving guide-catheter engagement and coaxial alignment in difficult coronary anatomy.
- Providing deep-seating support for selected complex coronary interventions, including some saphenous vein graft procedures.
Reported off-label uses
- Use as an auxiliary support catheter in selected complex peripheral vascular interventions has been described, but this is outside the device's coronary labeling.
- Use in noncoronary vascular beds or for applications other than temporary coronary device delivery may be reported in practice, but should be evaluated under applicable institutional and regulatory requirements.
Off-label use: these uses are reported in practice or the literature but are not part of the FDA-cleared indications. Physicians may use a cleared device off-label based on their medical judgment; the manufacturer may not promote off-label uses.
Evidence Summary
The available literature includes a case report and a study on complex saphenous vein graft interventions, published between 2019 and 2025. These studies explore innovative techniques and the device's role in challenging PCI scenarios.
Reported Outcomes
Published studies report successful use of the Guidezilla II in enhancing guide catheter support and facilitating complex PCI procedures. The device has been shown to improve access and delivery in challenging coronary anatomies, such as calcified saphenous vein grafts.
Safety Profile
Reported complications include the potential for vascular trauma due to deep intubation. However, specific adverse events were not detailed in the provided evidence, indicating a need for further safety data.
Evidence Limitations
The evidence is limited to a small number of studies, primarily case reports, which may not provide comprehensive safety and efficacy data. Further research is needed to establish long-term outcomes and broader clinical applicability.
Practical Considerations
- The catheter is intended for use with compatible coronary guide catheters and interventional devices; compatibility depends on the specific catheter size, inner diameter and device being delivered.
- Operators must maintain coaxial alignment and avoid excessive force, deep engagement or advancement against resistance, which can injure the vessel or damage the catheter.
- It is a temporary-use catheter and is not implanted permanently; duration depends on the procedure and should follow the labeling and institutional protocol.
- MRI safety should be confirmed in the current Boston Scientific instructions for use. Do not assume the catheter is MR safe or MR conditional after placement without device-specific documentation.
- Potential complications include coronary dissection, perforation, spasm, thrombosis, embolization, ischemia, bleeding and vascular injury. Contraindications and warnings should be reviewed in the current labeling.
Frequently Asked Questions
What are the clinical indications for Guidezilla II?
The Guidezilla II is indicated for use in percutaneous coronary interventions to enhance guide catheter support, particularly in complex coronary anatomies.
What outcomes have been reported in clinical studies?
Studies have reported successful enhancement of guide catheter support and improved delivery of interventional devices in challenging PCI scenarios.
What complications have been reported?
Reported complications include potential vascular trauma, but specific adverse events were not detailed in the available studies.
Disclaimer: This page compiles publicly available regulatory and published clinical evidence for educational reference.
It does not constitute medical advice, product endorsement, or a recommendation for clinical use.
Always consult manufacturer documentation and clinical judgment for patient care decisions.