A new vena caval filter for percutaneous placement and retrieval: experimental study

Area of Science:

• Vascular surgery
• Medical device innovation
• Interventional radiology

Background:

• Pulmonary thromboembolic disease poses a significant risk.
• Existing vena caval filters have limitations in placement and retrieval.
• A need exists for improved prophylactic devices.

Purpose of the Study:

• To describe a new percutaneously insertable and retrievable vena caval filter.
• To evaluate the safety and efficacy of this novel filter design.

Main Methods:

• The new vena caval filter was designed for percutaneous insertion via an angiographic catheter.
• Controlled penetration of the caval wall secures the filter.
• In vitro testing and in vivo placement/retrieval in mongrel dogs were performed.

Main Results:

• The filter demonstrated easy and safe placement and removal in canine models.
• In vitro studies showed high effectiveness and reduced positioning dependency compared to the Greenfield filter.
• The device's securement mechanism involves controlled caval wall penetration.

Conclusions:

• The novel vena caval filter is safe and effective for percutaneous insertion and retrieval.
• It offers advantages over existing devices, particularly regarding positioning.
• The filter is a potential candidate for prophylactic use in patients at high risk for pulmonary thromboembolism.