Collapsible medical device having an open lumen
The present disclosure provides collapsible medical devices that are formed from a braided tubular member configured to allow the braided tubular member to be terminated into one or more marker bands while maintaining an open lumen from a proximal end to a distal end. The collapsible medical device including the braided tubular member can be easily pulled down into a delivery sheath or other delivery device so that it is suitable for use with a number of delivery devices. The marker bands, which provide one or more attachment points for a medical device/delivery system, are positioned at one or more locations on the braid such that the braid is fixed and cannot unravel, thus preventing entanglement between individual braid wires and malformation of the device.
1. A collapsible medical device comprising:
a tubular member formed of a plurality of wires and having a preset, expanded configuration and a collapsed configuration, the tubular member having a center portion wherein the wires are in a braided configuration, and a distal end and a proximal end wherein the wires are in an unraveled configuration;
an open lumen extending from the proximal end to the distal end configured to allow passage of a fluid therethrough in the preset, expanded configuration;
at least one braid marker coupled to the tubular member at an interface between the center portion and the proximal end;
at least one braid marker coupled to the tubular member at an interface between the center portion and the distal end;
at least one securement mechanism coupled to the proximal end;
at least one securement mechanism coupled to the distal end;
wherein each securement mechanism is configured to secure at least a portion of the plurality of wires in the unraveled configuration near an outer circumference of the open lumen; and
wherein the plurality of wires in the unraveled configuration are unraveled along a longitudinal line between the respective at least one securement mechanism coupled to the proximal and distal ends and the respective at least one braid marker at the interfaces between the center portion and the proximal and distal ends.
2. The collapsible medical device of claim 1 , wherein the at least one securement mechanism coupled to the proximal and distal ends is a marker band.
3. The collapsible medical device of claim 1 , wherein the plurality of wires are constructed of a memory-shape alloy.
4. The collapsible medical device of claim 3 , wherein the memory-shape alloy is nitinol.
5. The collapsible medical device of claim 1 , wherein the plurality of wires are substantially the same length.
6. The collapsible medical device of claim 1 , wherein the device includes from 1 to about 12 securement mechanisms on each of the proximal end and the distal end.