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Crux vena cava filter.
Erin H Murphy1, Eric D Johnson, George E Kopchok
1General Surgery Resident, University of Texas Southwestern Medical Center, Dallas, TX 75903, USA.
Expert Review of Medical Devices
|September 16, 2009
Summary
Retrievable inferior vena cava filters offer pulmonary embolic prophylaxis but can face retrieval complications. The novel Crux filter aims for easier retrieval and improved efficacy, showing promise in preclinical and early human studies.
Area of Science:
- Vascular surgery
- Medical device technology
- Cardiovascular research
Background:
- Inferior vena cava (IVC) filters are used for pulmonary embolism (PE) prophylaxis in patients with anticoagulation contraindications.
- While retrievable filters reduce long-term complications associated with permanent devices, retrieval failures due to factors like device tilting and thrombus load occur in up to 30% of cases.
- These retrieval failures negate the advantages of retrievable filter technology.
Purpose of the Study:
- To introduce and evaluate the Crux vena cava filter, a novel device designed for improved retrievability and efficacy.
- To assess the safety and user-friendliness of the Crux filter in preclinical and early clinical settings.
Main Methods:
- The Crux vena cava filter's design features, including self-centering, low profile, and fatigue resistance, are highlighted.
- Preclinical safety and usability were assessed in an ovine model.
- Initial human implantation data is presented.
Main Results:
- The Crux filter demonstrated safety and user-friendliness in an ovine model.
- The device has been successfully implanted in human subjects, indicating initial feasibility.
Conclusions:
- The Crux vena cava filter represents a novel approach to IVC filtration, potentially overcoming limitations of existing retrievable filters.
- Early data suggests the Crux filter is safe, user-friendly, and feasible for human implantation, warranting further investigation.
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