đź“Š Evidence-Based Reference
Vena Cava Filter
Vena-Tech
Summary: The Vena-Tech vena cava filter is a device used to prevent thromboembolism in high-risk patients. It is primarily used when anticoagulation is contraindicated. Key evidence highlights complications associated with retrieval and long-term use.
FDA Clearance Information
Pathway ?
510(k)
Number ?
K901454 ↗
Decision Date ?
May 29, 1991
Product Code ?
DTK Filter, Intravascular, Cardiovascular
Device Class ?
Class 2
Evidence ?
0 studies
The Vena-Tech vena cava filter was cleared by the FDA through the 510k pathway on May 29, 1991. It is manufactured by Vena-Tech and classified as a Class 2 medical device.
What It Is
The vena cava filter is a medical device implanted into the inferior vena cava to prevent pulmonary embolism by capturing blood clots. It is intended for use in patients at high risk of thromboembolism, particularly when anticoagulation therapy is not suitable.
FDA-Cleared Indications
- Prevention of pulmonary embolism in patients at risk for thromboembolism.
- Use when anticoagulant therapy is contraindicated.
- Use when complications of anticoagulant therapy occur.
- Use when anticoagulant therapy is unsuccessful in preventing thromboembolism.
Clinical Applications
- Placement in the inferior vena cava for patients with venous thromboembolism who cannot receive anticoagulation.
- Protection against pulmonary embolism in patients with documented or suspected deep vein thrombosis when anticoagulation is unsuitable.
- Use after complications from anticoagulant therapy prevent continued treatment.
- Use when pulmonary embolism or other thromboembolic events occur despite anticoagulation.
Reported off-label uses
- Prophylactic placement in selected trauma patients considered at high risk for pulmonary embolism but without documented venous thromboembolism.
- Prophylactic placement in selected critically ill patients when clinicians judge the risk of pulmonary embolism to be high and anticoagulation cannot be used.
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 literature includes 15 studies, comprising systematic reviews, case series, and narrative reviews, published up to 2024. These studies explore complications, retrieval techniques, and clinical guidelines for vena cava filter use.
Reported Outcomes
Published studies report that vena cava filters effectively prevent thromboembolism in high-risk patients. However, there is a noted increase in complications with prolonged filter dwell time. The filters are particularly beneficial in patients with contraindications to anticoagulation.
Safety Profile
Reported complications include filter migration, tilt, and thrombosis, with increased risks during retrieval. Long-term complications may involve vena cava erosion and post-thrombotic syndrome, particularly with extended filter placement.
Evidence Limitations
Current evidence is limited by a lack of large-scale randomized controlled trials. Many studies focus on retrospective data, and there is a need for more prospective research to better understand long-term outcomes and refine retrieval techniques.
Practical Considerations
- The filter is delivered through a catheter, commonly through the femoral or internal jugular vein, and positioned in the inferior vena cava under fluoroscopic imaging.
- Vena cava filters are available in different designs and sizes; selection depends on inferior vena cava diameter, access anatomy, thrombus location, and the specific device labeling.
- The available FDA record should be reviewed for retrieval status and instructions. A permanent filter should not be assumed to be removable.
- MRI compatibility depends on the exact filter model and labeling; the device record alone does not establish that every Vena-Tech filter is MRI safe or MRI conditional.
- Potential complications include access-site bleeding, filter migration or tilt, caval thrombosis or perforation, recurrent pulmonary embolism, and difficulty with retrieval when retrieval is attempted.
Procedures that use this device
Frequently Asked Questions
What are the clinical indications for vena cava filter?
The vena cava filter is indicated for preventing thromboembolism in patients with contraindications to anticoagulation, such as those with deep venous thrombosis or cancer-associated thrombosis.
What outcomes have been reported in clinical studies?
Clinical studies have reported effective prevention of thromboembolism, particularly in high-risk patients, with noted complications increasing over time.
What complications have been reported?
Safety data from evidence indicate complications such as filter migration, tilt, thrombosis, and vena cava erosion, especially with prolonged use.
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.