MEDICAL DEVICE AND METHOD

摘要

A vessel-occluding medical device for the use in diagnosis and/or treatment of cardiovascular disease in the human body includes an outer tube, an inner tube slidably housed within the outer tube, and a tubular sleeve comprising a generally U-shaped, direction reversing region, which moves along the length of the tubular sleeve, to assume radially contracted and radially expanded state as the inner and outer tubes move between the first and second positions. When the tubular sleeve is in the radially expanded state, the inner portion of the tubular sleeve has a funnel-shaped surface and a longitudinally-extending opening to permit material to pass therethrough for receipt of material into the inner tube.

主权项

1. A catheter device for use in performing procedures in blood vessels, such as removing clots, the device comprising:
an outer tube having a proximal end and a distal end; an inner tube moveably disposed within the outer tube and having a proximal end, a distal end and an inner tube lumen therebetween; a flexible, tubular, braided mesh sleeve formed on a conically-shaped mandril and comprising multiple Nitinol strands, each of the strands having a diameter of 0.0015-0.0025 inches, wherein the sleeve comprises:
a distal end joined to the distal end of the outer tube;a proximal end joined to the distal end of the inner tube;a polymer-coated portion; andan uncoated portion; wherein the sleeve moves from a radially contracted configuration to a radially expanded configuration by moving at least one of the tubes to position the outer tube farther proximally relative to the inner tube, and wherein, when the tubular sleeve is in the radially expanded state, an inner portion of the tubular sleeve has a funnel-shaped surface and an opening in fluid communication with the inner tube lumen.