Cook's permanent vena cava filter:

Cook Medical has received US FDA 510(k) clearance to market its permanently implanted vena cava filter for capturing blood clots caused by medical conditions such as trauma and surgery before they can reach the lungs and cause a pulmonary embolism. The device, called Celect, was last year approved for permanent and retrieval indications in Canada, Australia and Europe. Trials are currently underway to study other aspects of the product, including its retrievability, said the Bloomington, Indiana firm. Celect employs a conical shape with a strut design that improves centering in the vessel and reduces in-growth, except at the desired end points.