| abstract |
An inflatable device ( 1 ) for use within the vasculature of a body and having an expandable annular body (Ia) which is expandable by inflation of a series of inflation lumen ( 2 ) defined therein, the device having inflated (b) and non-inflated (a) states and inner ( 3 ) and outer ( 4 ) annular walls, the device being adapted so that inflationary pressure within the lumen moves the device from the non-inflated state toward the inflated state by radially outward expansion of both the outer and inner walls so that the annular body expands to form an annular structure with a central lumen defined by the inner wall ( 3 ). Non-compliant or semi-compliant balloons ( 36 ) are provided in the inflation lumen ( 2 ). The device may be employed as an embolic filter or an introducer catheter. |